Welcome to the Calvert SAV blog for the 2018-2019 school year! The purpose of this site is to share the results of the CHESPAX seventh grade SAV project and to keep students, teachers, and other folks up to date on our progress throughout the season.
That's A Wrap, Folks
October 29, 2018
2018's 7th grade Chespax trips have wound to a close after a windy day out on the water. But what does that mean for everything creek and data related?
Coming up in the next few days there will be compiled and completed charts and graphs and tables detailing how well the creek did this Fall 2018 season!
So stay tuned for some awesome data!
Coming up in the next few days there will be compiled and completed charts and graphs and tables detailing how well the creek did this Fall 2018 season!
So stay tuned for some awesome data!
Whether the Weather Matters
October 19, 2018
When we think of plants and creek health, weather isn't always the first thing that comes to mind as a factor. Trees might get blown over in the wind or knocked over in the rain, but how would that affect the SAV down at the bottom of the creek?
Storms actually have a pretty big effect on the SAV population in the creek. All the wind and rain cause sediment from the shoreline to be pushed into the creek, increasing the turbidity and generally clouding up the water. This cloudiness causes the SAV to be unable to get the right amount of sunlight that they need to perform photosynthesis, making it so that they can't flourish and survive.
These large storms can cause large currents as well, making it so that the SAV holding onto the bottom of the creek is ripped out of the ground and pulled downstream. The currents can also pull out all the seeds that were sowed by the SAV for the next season. A bad storm can have quite the impact on the SAV beds in our creek! In fact, in Fall of 2011, two large storms came through the area, causing pretty bad flooding for the county. When the 7th graders went out on the SAV trips the next year in 2012, they didn't find much SAV at all! The storm had ripped out all the roots and all the seeds, leaving the creek almost bare.
The silver lining on all of this is that our creek is resilient, meaning that even if something bad like a storm happens, the creek always has the ability to bounce back and recover from disasters.
Storms actually have a pretty big effect on the SAV population in the creek. All the wind and rain cause sediment from the shoreline to be pushed into the creek, increasing the turbidity and generally clouding up the water. This cloudiness causes the SAV to be unable to get the right amount of sunlight that they need to perform photosynthesis, making it so that they can't flourish and survive.
These large storms can cause large currents as well, making it so that the SAV holding onto the bottom of the creek is ripped out of the ground and pulled downstream. The currents can also pull out all the seeds that were sowed by the SAV for the next season. A bad storm can have quite the impact on the SAV beds in our creek! In fact, in Fall of 2011, two large storms came through the area, causing pretty bad flooding for the county. When the 7th graders went out on the SAV trips the next year in 2012, they didn't find much SAV at all! The storm had ripped out all the roots and all the seeds, leaving the creek almost bare.
The silver lining on all of this is that our creek is resilient, meaning that even if something bad like a storm happens, the creek always has the ability to bounce back and recover from disasters.
The State of the Creek Address
October 11, 2018
For over a month now, 7th graders with Calvert County Public Schools have been going out onto Cocktown Creek, just off of the Patuxent River by Kings Landing Park, to survey and observe how the creek is doing with its health. As more results are coming back, a better picture of the creek is coming to light and the distribution and health of SAV can be more clearly seen.
Overall, the most common species in the creek so far is the invasive Hydrilla (Hydrilla verticilliata), with every trip out onto the creek coming back with multiple boats finding a sample of the species. While it's good that SAV is being found this commonly, Hydrilla is an invasive species, having pushed out the once abundant native species, Wild Celery. Unlike years past, however, the students haven't found the large, choking mats of it that were found previously near the back of the creek.
Another species commonly found in the creek so far has been the Coontail (Ceratophyllum demersum). Most boats come back with a sample of Coontail, with only two or three trips not finding any. Like the Hydrilla, the Coontail can be found throughout the creek, but so far seems to be most common in the middle sections.
The other species of SAV, like the Naiad and Common Waterweed, are less common than both Hydrilla and Coontail, but can still be found in certain areas of the creek. So far Naiads, Common Waterweed, and a single Curly Pondweed have been found by the students!
All in all, in terms of SAV, things aren't looking as bad as they have been back on Cocktown Creek. We eagerly look forward to seeing what is discovered in the next few weeks by the 7th graders!
Overall, the most common species in the creek so far is the invasive Hydrilla (Hydrilla verticilliata), with every trip out onto the creek coming back with multiple boats finding a sample of the species. While it's good that SAV is being found this commonly, Hydrilla is an invasive species, having pushed out the once abundant native species, Wild Celery. Unlike years past, however, the students haven't found the large, choking mats of it that were found previously near the back of the creek.
Another species commonly found in the creek so far has been the Coontail (Ceratophyllum demersum). Most boats come back with a sample of Coontail, with only two or three trips not finding any. Like the Hydrilla, the Coontail can be found throughout the creek, but so far seems to be most common in the middle sections.
The other species of SAV, like the Naiad and Common Waterweed, are less common than both Hydrilla and Coontail, but can still be found in certain areas of the creek. So far Naiads, Common Waterweed, and a single Curly Pondweed have been found by the students!
All in all, in terms of SAV, things aren't looking as bad as they have been back on Cocktown Creek. We eagerly look forward to seeing what is discovered in the next few weeks by the 7th graders!
Like a Needle in a Haystack (Baystack??)
October 2, 2018
A first for Chespax was found last week with Ms. Liston's class of 7th graders during the seine haul done along our beach!
This is an Atlantic Needlefish (Strongylura marina), a fish commonly found in the lower bay that preys on smaller fish.
What was it doing this far up the Patuxent? With all the wind and weather that we've been getting lately, there's a high chance that this fish might have been caught up in a current that brought it all the way to our net! Let's hope that it found its way back to the Bay proper!
This is an Atlantic Needlefish (Strongylura marina), a fish commonly found in the lower bay that preys on smaller fish.
What was it doing this far up the Patuxent? With all the wind and weather that we've been getting lately, there's a high chance that this fish might have been caught up in a current that brought it all the way to our net! Let's hope that it found its way back to the Bay proper!
A Very Neat Find!
September 27, 2018
Yesterday on their SAV survey, Ms. Liston's 7th grade class from Windy Hill Middle School found an impressive find! Curly Pondweed, one of our native types of SAV, has not been found this year during our surveys, so seeing it yesterday was a very welcome sight!
Curly pondweed can be identified by the wavy edges of the leaf, and while not an important food source for local wildlife, still provides great hiding spots for young fish and shrimp, as well as helps keep sediment out of the creek!
Curly pondweed can be identified by the wavy edges of the leaf, and while not an important food source for local wildlife, still provides great hiding spots for young fish and shrimp, as well as helps keep sediment out of the creek!
Fish Species and What They Can Indicate
September 24, 2018
What comes to mind when you think of water? Probably one of the first things is fish, or at least fishing. Our 7th graders that have been coming on the Chespax trips to King's Landing Park get to do just that during their visits. Using waders and a seine net, groups of four go into the water and bring back what they can catch.
Here are some of the fish that have been found by the classes that have gone out!
Here are some of the fish that have been found by the classes that have gone out!
But what does finding all these fish mean for our SAV and the health of the creek? We pulled up juvenile Rockfish (or Striped Bass for those of you who know it by that name), which can indicate that there is an abundance of smaller fish for the Rockfish to prey upon! An abundance of smaller fish means that the SAV beds must be doing good as well, since those smaller fish depend on the SAV for shelter and food. So by pulling up predator fish, like Rockfish and White Perch, we can make the conclusion that the SAV beds must be healthy, otherwise we wouldn't see those larger fish!
What Does Rain Mean for SAV?
September 17, 2018
With what remains of Hurricane Florence bearing down on our location at King's Landing Park, what does this mean for the SAV and creek?
When it rains heavily, what can happen are a few things that affect SAV. First, heavy rains can bring with them lots of run-off, including phosphorites, fertilizers, other chemicals from farming or lawn care, and loads of soil and silt. Chemicals in the water can influence algae growth, which will block the sunlight from getting down into the water, as well as create dead zones in the water after the algae dies. Silt and soil can also clog up the water, making sure that sunlight can't reach down to the SAV that needs it to grow.
Rain also changes the water chemistry of the creek. Inundation of fresh water into the creek will lower the salinity, sometimes almost to zero parts per thousand (ppt) at the back of the creek! While some SAV, like the Naiad, thrive in fresh water, other species need just a little bit of salinity in order to grow.
So how will the upcoming rain affect the SAV in the creek? Will we see more Naiad species or will there be less overall? Stay tuned for updates as we head out again for another survey!
When it rains heavily, what can happen are a few things that affect SAV. First, heavy rains can bring with them lots of run-off, including phosphorites, fertilizers, other chemicals from farming or lawn care, and loads of soil and silt. Chemicals in the water can influence algae growth, which will block the sunlight from getting down into the water, as well as create dead zones in the water after the algae dies. Silt and soil can also clog up the water, making sure that sunlight can't reach down to the SAV that needs it to grow.
Rain also changes the water chemistry of the creek. Inundation of fresh water into the creek will lower the salinity, sometimes almost to zero parts per thousand (ppt) at the back of the creek! While some SAV, like the Naiad, thrive in fresh water, other species need just a little bit of salinity in order to grow.
So how will the upcoming rain affect the SAV in the creek? Will we see more Naiad species or will there be less overall? Stay tuned for updates as we head out again for another survey!
An Interesting Find!
September 13, 2018
The first students have gone out onto Cocktown Creek to aid in our survey of SAV! The 7th graders all headed out on their canoes upstream, stopping at two separate locations to survey the SAV there. Hydrilla was the most commonly found, with every boat in both groups finding the species, followed by some Coontail, found by all boats in the second group. Common waterweed was the next most common one, found by a number of boats in the second group, closer to the mouth of the river.
There was, however, an interesting find while the second group was moored for their lunches. A piece of Naiad, found floating close to where they stopped! Unfortunately for our data, that piece was unable to be counted as part of the survey, as we didn't know where it had come from or what section of the creek it could be found.
Other fun finds included an osprey, a bald eagle, a red-bellied turtle, a really cool looking grasshopper, and a few laughing gulls out on the Patuxent! Make sure you stay tuned for any more interesting finds or cool stories that happen over the course of our trips!
There was, however, an interesting find while the second group was moored for their lunches. A piece of Naiad, found floating close to where they stopped! Unfortunately for our data, that piece was unable to be counted as part of the survey, as we didn't know where it had come from or what section of the creek it could be found.
Other fun finds included an osprey, a bald eagle, a red-bellied turtle, a really cool looking grasshopper, and a few laughing gulls out on the Patuxent! Make sure you stay tuned for any more interesting finds or cool stories that happen over the course of our trips!
Gearing up for Survey Season!
September 12, 2018
It's a little over a full week since school started and you know what that means? 7th graders from around the county are going to be making their way to King's Landing Park to participate in CHESPAX's annual SAV Survey! Each 7th grade science class will be headed out onto the waters of Cocktown Creek, canoeing down it to see what kind of SAV they can find.
These science classes not only get to canoe, but also will be participating in several other activities helping assess Bay health. The students will be seining for fish and invertebrates, testing water quality, among other activities. How do you think the Bay is doing? Keep up to date with the findings and stories right here!
These science classes not only get to canoe, but also will be participating in several other activities helping assess Bay health. The students will be seining for fish and invertebrates, testing water quality, among other activities. How do you think the Bay is doing? Keep up to date with the findings and stories right here!
Fall Preliminary SAV Survey
September 6, 2018
The Sun beat down overhead as we rowed out onto the Patuxent, heading for the mouth of Cocktown Creek in the sweltering heat and humidity of the early morning. Despite the heat, the mood was already set high thanks to a pair of Bald Eagles being spotted merely minutes into the trip. Fish leaped from the water, shad and other species we didn't see long enough to ID, either hunting or escaping our canoe as it traveled further into the creek. Kingfishers cried out overhead and even the occasional osprey!
But this trip was about the SAV, finding it and seeing how things looked in the creek before the students begin arriving next week. Hydrilla verticillia (also known as Hydrilla) is an invasive species of SAV that's pretty abundant in the creek now. We found quite a bit of it, even more the further away from the mouth of the creek that we traveled. Hydrilla was found at the back of the creek in large mats, covering almost a quarter of the width of the creek.
But this trip was about the SAV, finding it and seeing how things looked in the creek before the students begin arriving next week. Hydrilla verticillia (also known as Hydrilla) is an invasive species of SAV that's pretty abundant in the creek now. We found quite a bit of it, even more the further away from the mouth of the creek that we traveled. Hydrilla was found at the back of the creek in large mats, covering almost a quarter of the width of the creek.
But Hydrilla wasn't the only species of SAV that was found during the preliminary survey. Common Waterweed(Elodea canadensis) and Coontail (Ceratophylum demersum) were both found in smaller quantities along the other markers on the creek.
Outside of a tree that was down about midway up the creek, we were able to progress with little to no difficulty, so conditions should be perfect for the students when they arrive! We're all looking forward to what they are going to find when they're out there surveying!
Outside of a tree that was down about midway up the creek, we were able to progress with little to no difficulty, so conditions should be perfect for the students when they arrive! We're all looking forward to what they are going to find when they're out there surveying!
Spring SAV Surveys Come to a Close
June 4, 2018
The 2017-2018 school year has been notable for our 7th grade SAV surveys. This year has shown a decline in SAV, both in diversity and quantity. This was clear in the fall and continued into the spring. While cold temperatures seem to be part of the problem, the experience of the teachers at CHESPAX tells them that there are other factors at work. Water clarity is certainly a problem, but that like is a result of the declining SAV, not the the cause.
Interestingly, in this very slow season with many 'no SAV found' surveys, a species of SAV was found one time that had NEVER been found on Cocktown Creek in all the years of this survey. On May 21, 2018, the students from Ms. Skiados' class that were in Ms. Popernack's canoe found a specimen of Southern Naiad (pictured below). Finding this species gives hope that maybe with the decline of hydrilla, some native species may find their way back into our creek.
Interestingly, in this very slow season with many 'no SAV found' surveys, a species of SAV was found one time that had NEVER been found on Cocktown Creek in all the years of this survey. On May 21, 2018, the students from Ms. Skiados' class that were in Ms. Popernack's canoe found a specimen of Southern Naiad (pictured below). Finding this species gives hope that maybe with the decline of hydrilla, some native species may find their way back into our creek.
Right now we are not able to pinpoint the exact cause of the SAV decline, however, the ongoing nature of this survey allows us to create the big picture over time. By comparing this year's data to past years and upcoming years, we may be able to piece together the likely causes of the decline, and hopefully see the SAV bounce back quickly.
If you have any thoughts on the water clarity or surprisingly low SAV numbers, let us know! You can view this year and historic data on the CHESPAX website: www.calvertnet.k12.md.us/departments/instruction/instruction_program_information/chespax/sav_page/
If you have any thoughts on the water clarity or surprisingly low SAV numbers, let us know! You can view this year and historic data on the CHESPAX website: www.calvertnet.k12.md.us/departments/instruction/instruction_program_information/chespax/sav_page/
The Wildlife
May 22, 2018
SAV may be the focus of our 7th grade survey, but no trip to Kings Landing would be complete without noting the wildlife both in the water and around the shores! Our birds around the river and creek have been abundant with bald eagles, ospreys, and cormorants being seen regularly. Northern water snakes and turtles are a common sight on sunny days, and the fishing has picked up in the past week! Below are some of our favorite finds this spring!
It may look like SAV...
May 16, 2018
This week at CHESPAX we were very excited thinking we had found another species of SAV in Cocktown Creek. The green beauty pictured above was found by multiple canoes within a group and seemed to fit the qualifications for SAV. However, upon further inspection we realized we'd found another type of algae known as Muskgrass. This type of algae is often mistaken for SAV, but lacks true leaves, stems, or roots. While not what we were hoping to find during our survey, it does serve some purpose as it provides good to excellent food value for waterfowl.
Slow spring for SAV
May 15, 2018
It’s been a cold spring (snow days in late March ring a bell?!). Just like the slow start to spring, we had a slow start to our SAV surveys! CHESPAX had to delay the start of 7th grade canoeing trips by more than a week, and even then, we came up with no SAV for the first few trips. Slowly, the horned pond weed is starting to be found on a regular basis but has yet to be found by every canoe in a group as is typical for late spring. Additionally, only 2 (Coontail first and recently Hydrilla) other species have been found indicating potentially low diversity of SAV species. After surveying the creek multiple times we can say with confidence that this isn’t normal! So what in Cocktown Creek is going on here?!
Weather watch!
Our little creek’s SAV species like just the right temperature, not too cold, but not too hot. The water temperatures have been lower than normal, which leads us to believe that maybe the SAV are just getting a slow start this spring and once we have consistently warm weather we will see significant growth. However, as we observed last fall, sediment continues to be a big problem. Our secchi depth readings are low and our turbidity is high. If the water is murky and the SAV cannot get sunlight, they will not grow well. On the flip side, SAV helps reduce the sediment in the water, so it can be hard to solve the sediment issue without the SAV.
Below is a picture of Cocktown Creek where SAV (particularly hydrilla) was once abundant. We have noticed a significant decline in the 2017-2018 school year.
Weather watch!
Our little creek’s SAV species like just the right temperature, not too cold, but not too hot. The water temperatures have been lower than normal, which leads us to believe that maybe the SAV are just getting a slow start this spring and once we have consistently warm weather we will see significant growth. However, as we observed last fall, sediment continues to be a big problem. Our secchi depth readings are low and our turbidity is high. If the water is murky and the SAV cannot get sunlight, they will not grow well. On the flip side, SAV helps reduce the sediment in the water, so it can be hard to solve the sediment issue without the SAV.
Below is a picture of Cocktown Creek where SAV (particularly hydrilla) was once abundant. We have noticed a significant decline in the 2017-2018 school year.
Scientists say…
CHESPAX has spoken with other scientists researching around the bay, and they’ve asked about our salinity levels over the 2017 summer. High salt levels in the summer can lead to poor hydrilla growth in the following seasons, and we definitely noticed a decrease last fall that has continued to this spring. Unfortunately, we do not monitor water quality in our creek over the summer, but some continuous monitoring stations along the Patuxent River indicate salinity could have been a factor (http://eyesonthebay.dnr.maryland.gov/ ). Amidst reports of increased bay grasses around the Chesapeake, we find our lack of SAV even more puzzling. However, the problem does not seem contained to our creek alone. Check out this article about Anne Arundel SAV http://www.capitalgazette.com/news/environment/ac-cn-no-grasses-20180510-story.html.
Keeping track!
Although each 7th grader is only out here for one day, their data is incredibly important to scientists tracking the health of the Chesapeake Bay. Citizen scientists are collecting data all around the bay and tracking information. This data is compiled and allows scientists to track SAV and water quality. As they start noticing trends they can predict what the causes might be. If you have a hypothesis on what’s causing the SAV decline, share it! We’d love to hear your thoughts.
CHESPAX has spoken with other scientists researching around the bay, and they’ve asked about our salinity levels over the 2017 summer. High salt levels in the summer can lead to poor hydrilla growth in the following seasons, and we definitely noticed a decrease last fall that has continued to this spring. Unfortunately, we do not monitor water quality in our creek over the summer, but some continuous monitoring stations along the Patuxent River indicate salinity could have been a factor (http://eyesonthebay.dnr.maryland.gov/ ). Amidst reports of increased bay grasses around the Chesapeake, we find our lack of SAV even more puzzling. However, the problem does not seem contained to our creek alone. Check out this article about Anne Arundel SAV http://www.capitalgazette.com/news/environment/ac-cn-no-grasses-20180510-story.html.
Keeping track!
Although each 7th grader is only out here for one day, their data is incredibly important to scientists tracking the health of the Chesapeake Bay. Citizen scientists are collecting data all around the bay and tracking information. This data is compiled and allows scientists to track SAV and water quality. As they start noticing trends they can predict what the causes might be. If you have a hypothesis on what’s causing the SAV decline, share it! We’d love to hear your thoughts.
Calvert County 7th Graders Make a Difference!
The Daily Press reports that 'anti-pollution' efforts in the Chesapeake Bay are working to restore submerged aquatic vegetation (SAV)! The article sites an ongoing study that has tracked SAV since 1984 - this is what our 7th graders from Calvert County contribute too! The information collected by our 7th graders each year is submitted and being used to prove that our save the bay efforts are working and making a positive impact on the health of the Chesapeake Bay. Click the picture to read the full article.
SAV Biodiversity
SAV beds are in global decline, and scientists are working to halt (and reverse) this trend before it's too late. It looks like species biodiversity may hold promise for replanting these beds. Check out this article from Science Daily!
www.sciencedaily.com/releases/2017/11/171108131836.htm
www.sciencedaily.com/releases/2017/11/171108131836.htm
Fall 2017 SAV surveys are complete!
Thank you to all the students, teachers, and chaperones who came out to Kings Landing! We wrapped up a strange fall season on Halloween. As we look at the data, many questions arise concerning the status of Cocktown Creek, and our section of the Patuxent River.
As mentioned in previous posts, the number one thing that has jumped out at us this fall was the lack of Hydrilla in the creek! Not long ago, the masses of Hydrilla were so thick in some areas that a canoe could not pass through. This fall, there were days where not even a single canoe team found a specimen of Hydrilla. The Naiad species also took a noticeable drop from recent fall seasons. To pile on to the declining SAV numbers, there were five trips in which canoe teams went out and did not find a single piece of SAV!!! (See Chart below or click the link to download the PDF)
As mentioned in previous posts, the number one thing that has jumped out at us this fall was the lack of Hydrilla in the creek! Not long ago, the masses of Hydrilla were so thick in some areas that a canoe could not pass through. This fall, there were days where not even a single canoe team found a specimen of Hydrilla. The Naiad species also took a noticeable drop from recent fall seasons. To pile on to the declining SAV numbers, there were five trips in which canoe teams went out and did not find a single piece of SAV!!! (See Chart below or click the link to download the PDF)
sav___found_fall_2017.pdf | |
File Size: | 180 kb |
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Even more puzzling, is the increase in Common Waterweed. Despite its name, this SAV species was once a rare find on Cocktown Creek, but it was found by 40% of canoe teams this season! For the first time in recent memory, we had relative abundance scores of “3” for Common Waterweed . Could the drop in Hydrilla be allowing this native species to thrive?
Other areas of the Patuxent River have had marked improvements this year, both to the north and south of Kings Landing. However, in our section we had poor water quality, as seen through high turbidity numbers and low secchi depth readings. In fact, water clarity has not been so low since 2012 after Tropical Storm Lee and Hurricane Irene (see chart below or click link to download the PDF).
Other areas of the Patuxent River have had marked improvements this year, both to the north and south of Kings Landing. However, in our section we had poor water quality, as seen through high turbidity numbers and low secchi depth readings. In fact, water clarity has not been so low since 2012 after Tropical Storm Lee and Hurricane Irene (see chart below or click link to download the PDF).
secchi_depth_2011-2017.pdf | |
File Size: | 168 kb |
File Type: |
Our SAV data is just one piece of the puzzle as scientists look at the health of the Chespeake Bay and surrounding bodies of water. An interesting piece of the puzzle has been observed by our 7th graders this fall. Our data brings up some interesting questions. Has the decline in Hydrilla been caused by poor water clarity? Or, do we have poor water clarity due to the decline in Hydrilla? We know that an important function of SAV is to clean the water. Without SAV, sediment moves freely as seen in the picture below taken by a drone near marker 4 on Cocktown Creek.
Have there been other factors contributing to the low amounts of SAV, such as an increase in salinity or summer storms? As our classes turn in the data from fall surveys to the US Fish and Wildlife Service, and others around the Chesapeake Bay contribute their information, perhaps we will gain insight as to what our piece of the puzzle means. We do know that if we can work to increase water clarity, we should have thriving SAV beds, abundant wildlife, and ultimately a healthy ecosystem.
Check it out!
While we are having some unusual observations this fall on Cocktown Creek, there is positive news from the shores of Solomons! Check out this article from Chesapeake Biological Lab.
www.umces.edu/news/bay-grasses-return-shores-solomons-will-they-persist
www.umces.edu/news/bay-grasses-return-shores-solomons-will-they-persist
Fall SAV trips are underway!
September was a busy month, and our groups have explored every part of Cocktown Creek at least once, making some interesting observations.
*One of the most notable observations so far is the lack of Hydrilla in the creek. In past seasons, this SAV species was abundant and found in every part of the creek. This season it is somewhat of a rare find and is sparse where it is found.
*Along the same lines, there has been a low density and low variety found throughout the creek, with Coontail being the most commonly found SAV.
*There has been a specimen of Horned Pondweed found this month, which is unusual for the warmer waters of fall.
*On a positive note, the wildlife sightings have been wonderful with Bald Eagles, Osprey, Red Bellied Turtles, Great Blue Herons and water snakes being spotted on multiple trips.
*Our Seventh Grade fishers have also come up with a variety of species in their seine hauls including the interesting Hogchoker seen here.
The data collected from Calvert County seventh graders will be compared to data around the Chesapeake Bay area to see if other areas are having similar observations or if it is confined to a small area. Information on the water quality may start giving us insight into the reasons for low SAV counts. While temperature may be slightly on the high side, algae and turbidity readings are right around average. The visibility is low in the water as shown through low Secchi depth numbers. It will be interesting to see how the story plays out this fall as each seventh grade class adds another piece to the SAV puzzle.
Spring surveys are complete!
From the entire CHESPAX Staff, we want to say Thank You for another great season out on the Creek. It was a windy season, and the transparency tube measurements were just a bit lower than seasons past. The interesting story is that of Horned Pond Weed. As shown above, the seventh graders found Horned Pond Weed less than 50% of the time, quite a decrease. Additionally, the usual "horns" - flowering parts of the plant- were not evident even once from all that were collected. This was a first in our CHESPAX memory! Overall, the Bay Journal reports that the SAV in the Bay region is doing well, so we look forward to seeing what next school year brings. Link to Bay Journal article
The seventh graders collected many Shad and Croaker this season, these numbers seem to ebb and flow over the years.
The seventh graders collected many Shad and Croaker this season, these numbers seem to ebb and flow over the years.
Spring Is Here...
Our seventh graders have been out on the Creek and their data has a story to tell. They have completed almost two cycles on the creek. It is what we are NOT finding that is the story. The students are finding that Horned Pondweed is very scarce compared to past years. Hydrilla is still relatively abundant and they even found a few samples of Curly Pondweed (pic. above). Could the lack of Horned Pondweed be due to low temperatures? The Turbidity (secchi depth) readings have been very low, averaging under 30 cm---very far from the optimal 100 cm target, let's see what the rest of the season brings. We had a Rough Greensnake cross our path, and Mr. Harten was kind enough to let the students get to see the snake up close.
Here is a link to this season and past years' data. If any class can look at the years past and compare water temperatures or if they have a different hypothesis of why we are low on Horned Pondweed this year, let us know and we will post their findings here.
Don't forget to keep checking the OSPREY CAM - the eggs should begin hatching in a couple of weeks.
~See you on the Creek,
CHESPAX Staff
Here is a link to this season and past years' data. If any class can look at the years past and compare water temperatures or if they have a different hypothesis of why we are low on Horned Pondweed this year, let us know and we will post their findings here.
Don't forget to keep checking the OSPREY CAM - the eggs should begin hatching in a couple of weeks.
~See you on the Creek,
CHESPAX Staff
Fall 2016 Updates
The Fall 2016 SAV survey season ended on Halloween. Not surprisingly, Hydrilla was the most abundant species found throughout Cocktown Creek. The seventh graders’ data showed that the diversity of species, especially in the back part of the Creek, has dropped significantly over the past several years. Where we used to collect 6-7 species, we are only finding 1 or 2. This change impacts our feathered friends who are dependent upon our native species for their nutrition. It was encouraging that the seventh graders found many samples of Common Waterweed this season and we look forward to seeing if this turns into a pattern in the spring.
In looking at water quality, the data suggests the SAV is struggling for sunlight. In Vivo Chlorophyll (ug/l) averaged out at 36, 24 & 23 for the front, middle and back of the creek respectively. We like to see the numbers < 25. Turbidity (NTU) was 19, 15 & 13, close to zero is ideal. The Sechhi Depth (cm) readings averaged at 25, 33 & 42, but >100 cm is optimal for healthy SAV growth. Look at the chart above to see how your class trip compares to this season's averages.
The fish data shows that we continue to get a variety of species, with two American Eels caught this season. The largest catch of the season goes to Windy Hill Middle with over 3,400 Grass Shrimp caught during the 8 seine hauls.
See you in the spring of 2017 ~CHESPAX Staff
Email us if you would like receive the Excel files for this season
Fall 2016 SAV data, fish data, water quality data & past data
In looking at water quality, the data suggests the SAV is struggling for sunlight. In Vivo Chlorophyll (ug/l) averaged out at 36, 24 & 23 for the front, middle and back of the creek respectively. We like to see the numbers < 25. Turbidity (NTU) was 19, 15 & 13, close to zero is ideal. The Sechhi Depth (cm) readings averaged at 25, 33 & 42, but >100 cm is optimal for healthy SAV growth. Look at the chart above to see how your class trip compares to this season's averages.
The fish data shows that we continue to get a variety of species, with two American Eels caught this season. The largest catch of the season goes to Windy Hill Middle with over 3,400 Grass Shrimp caught during the 8 seine hauls.
See you in the spring of 2017 ~CHESPAX Staff
Email us if you would like receive the Excel files for this season
Fall 2016 SAV data, fish data, water quality data & past data
At this point in the season, our seventh graders have finished almost 6 complete surveys of the Creek. Consistent with years past, Hydrilla dominates the scene, although one other species has been collected in more sections of the Creek than usual – Common Waterweed. It has been found in almost every section of the creek this season. This is very good news as we have seen a diversity of species shrinking over the past several years. Our seventh graders continue to haul in a wide variety of fish during their seining activity. Of note would be a large mummichog (pictured). Did you know the mummichog was chosen to be the first fish sent into space to live in SkyLab back in the 1973? We have also collected a few Naked Gobies and even a juvenile Atlantic Croaker (pictured). NMS raised their season Inland Silverside record to 169 and the Grass Shrimp season record of 145 is now held by WHMS. Our next update will look at the water quality data for the season. See you on the Creek! ~CHESPAX Staff
Click here for this season’s SAV and Water Quality data & Click here for this season’s Fish data
Click here for more information about the mummichog
Visit the CHESPAX webpage for all of the past data
Click here for this season’s SAV and Water Quality data & Click here for this season’s Fish data
Click here for more information about the mummichog
Visit the CHESPAX webpage for all of the past data
Our seventh grade classes have surveyed each section of the creek about two times at this point in the season. Their data has shown that Hydrilla continues to be the biggest part of the story here on Cocktown Creek. Students and chaperones have also collected Coontail, Naiad and even a few samples of Common Waterweed. Mr. Hendrix’s class had a close view of a Bald Eagle flying by on September 27th, quite possibly the bird was fueling up before its migration further south. We know that the intersection between SAV and wildlife, like the bald eagle, exists through the robust fish populations along the Patuxent.
Our seventh grade classes have collected some interesting fish already this year. Following our patterns of seasons past, we have collected numerous Inland Silversides, Mummichogs, Grass Shrimp and White Perch. Ms. Miller’s class also captured an American Eel (pictured) and Mr. Pellock’s class holds this season’s record for juvenile Striped Bass (3). As the season continues, we will see if anyone tops Ms. Skiados’ Silverside season record of 154 or Mr. Roth’s season record of 36 Bay Anchovies. You can click the following links to view this season’s data so far SAV & Fish or click here for years past. See you on the Creek! ~CHESPAX staff
Our seventh grade classes have collected some interesting fish already this year. Following our patterns of seasons past, we have collected numerous Inland Silversides, Mummichogs, Grass Shrimp and White Perch. Ms. Miller’s class also captured an American Eel (pictured) and Mr. Pellock’s class holds this season’s record for juvenile Striped Bass (3). As the season continues, we will see if anyone tops Ms. Skiados’ Silverside season record of 154 or Mr. Roth’s season record of 36 Bay Anchovies. You can click the following links to view this season’s data so far SAV & Fish or click here for years past. See you on the Creek! ~CHESPAX staff
Spring 2016 Updates
May 3, 2016
Bay Grasses increase 29% in Maryland Waters
"Underwater grass abundance increased 29 percent between 2014 and 2015 in Maryland waters, indicating an improvement in water quality, according to the Department of Natural Resources.The vegetation growth hit a new record, 52,277 acres, putting the state at 94 percent of its 2017 goal of 57,000 acres."
Bay Grasses increase 29% in Maryland Waters
"Underwater grass abundance increased 29 percent between 2014 and 2015 in Maryland waters, indicating an improvement in water quality, according to the Department of Natural Resources.The vegetation growth hit a new record, 52,277 acres, putting the state at 94 percent of its 2017 goal of 57,000 acres."
Fall 2015 Updates
October 27, 2015
When both groups entered cocktown creek, they were greeted by an unfamiliar face. It is hard to tell if this morning greeting was a male or female. Beavers are almost identical from male to female. Nonetheless, it was a great surprise and photo opportunity. I hope to see more animal encounters next spring when we continue to search for more S.A.V. |
October 22, 2015
Have you ever wondered how you could help the growth of S.A.V. A group of Volunteers are in the process this year to help the regrowth of Wild Celery. "This submerged aquatic vegetation was a good sign for the group of people stepping into waders on the shore on a hot afternoon in early September. The Anacostia Watershed Society’s truck bed was full of wild celery, an SAV species that once grew in the Anacostia, and one they’d like to see return as both a contributor to, and harbinger of better waters." |
September 14, 2015
Mrs. Thames class from Northern Middle School found a wide variety of S.A.V. including Coontail, Naiad, Hydrilla, Common Waterweed and WILD CELERY. We are excited to have a great example to show in the classroom to all the other classes. Here's hoping for a great year and more opportunities to find Wild Celery.
Mrs. Thames class from Northern Middle School found a wide variety of S.A.V. including Coontail, Naiad, Hydrilla, Common Waterweed and WILD CELERY. We are excited to have a great example to show in the classroom to all the other classes. Here's hoping for a great year and more opportunities to find Wild Celery.
Spring 2015 Field Updates
Horned Pondweed S.A.V. is like the daffodils of the spring time. When you walk around and see daffodils budding and flowering you know spring has come. That is the same way it is on the water when Horned Pond weed is found. Horned Pondweed grows slim leaves that are thread like. It can be easily confused with Slender Pond weed. Horned pond weed has distinctive horned seeds on the leaves
Just like us, the birds are looking forward to spring. Soon, Ospreys will be joining the residential bald eagles. I have seen a rise of bald eagles and usually spot them throughout the county along route 4 soaring in the sky. Recently, there has been a study how Hydrilla, a Submerged Aquatic Vegetation (S.A.V.), is affecting birds like the Coot that eats the Hydrilla, which releases a brain altering toxin. This nuerotoxin affects the bird where it becomes an easy prey for the Bald Eagle. However, the Bald Eagle could be affected by this toxin by developing a deadly disease in their system. For more information check out this link.
Fall 2014 Field Updates
October 21, 2014
Dr. Curry, the new superintendent of Calvert County Public Schools joined Mr. Roth's 7th grade class from Southern Middle School on their CHESPAX Field Trip. Dr. Curry tweeted his thoughts and sights throughout the day. |
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October 23, 2014
Today may mark the end of an era. The elusive and mysterious wild celery made an appearance on Cocktown Creek today around marker #8. A piece was scraped up by a student from Calvert Middle School in Mrs. Campbell science class. The tide was extremely low which is why this patch has not been seen yet this school year. Could this be the beginning of the return of the Wild Celery SAV? Only time will tell. For now we are delighted to see its return. The piece was small, and was an unofficial collection. We are still determining if it was Wild Celery or a piece of marsh grass. |
October 21, 2014
Here is something we found during our Seine Fish Haul. It isn't a fish but an insect called a Water Strider. Water strider's are about a half inch long with a thin body and three sets of legs. A water strider’s front legs are much shorter than the two sets of back legs. The shorter legs are used for catching and holding onto food. Water striders eat insects and larvae on the surface of water, such as mosquitoes and fallen dragonflies. Check out this link for more information about Water Striders |