Tag Archives: SUNY-ESF

Hail the Snails!

Need to slow down your fast-paced life?

The Chit in its natural habitat, by C. Gilbertson
The chits are well camouflaged for living in the leaf litter, by C. Gilbertson

Try watching a snail! No seriously, it’s quite calming. They glide along and seemingly know exactly where they are going. They are curious, and if you listen really carefully, you may hear them munching away when they eat!

Cody Gilbertson, a Master’s student of conservation biology at SUNY-ESF, has been working with and watching snails since 2010. On top of that, the species she works with is a small land snail that is also one of the most endangered species of New York. This little snail is quite famous because it is only found at one location in the entire world!

Not a bad field site! By P. Harper
Not a bad field site! By P. Harper

The Chittenango Ovate amber snail resides at Chittenango Falls State Park. At the base of a waterfall 167 feet in height, this unique species goes about its business amongst rocky ledges and lush vegetation. This summer, teams of volunteers signed up to help Gilbertson assess the size of the snail population and contribute data for her research.

In these snail surveys, volunteers survey small plots of snail habitat for a set amount of time, capturing small snails in tupperware containers as they go. After the collection, all the captured snails are sorted an identified, so we can figure out which are Chittenango Ovate Amber Snails (affectionately called “Chits”) and which are other snail species. After the count, the Chits are released back where they were found and the other snails are removed.

The team scrambles over rocks! By P. Harper
The team scrambles over rocks! By P. Harper

The data from these surveys is part of Gilbertson’s greater study on the life cycle of this rare snail and figuring out what is necessary for their survival. What do they eat? What conditions do they need to survive? How the heck do they live through upstate New York winters? She is looking for new methods to increase this snail’s overall numbers with a goal to help stabilize their population and create a template for other conservation efforts for land snail species.

Captive COAS_Cody Gilbertson_SUNYESF
This baby snail was born in captivity, and may provide clues to how we can protect the endangered chits. By C. Gilbertson

Another important aspect of the project is captive breeding. So far, Gilbertson has successfully bred a biologically similar snail species and yielded roughly 3000 hatchlings. She is also looking at how many other snail species live in isolated populations within New York State to find out if isolated populations are common or rare in this family of snails.

Not many people slow down to examine the small beings on earth. Some animals may almost be invisible, but they all play a big part in ecosystems and the small size of the animal does not make them less important. So next time you’re feeling rushed in life, take a moment to watch a snail, you’d be amazed at the calm steady creature before you!

Featured image is of Chittenango Falls at Chittenango Falls State Park, by Paris Harper.

Post by Cody Gilbertson and Paris Harper

Predator Study At State Parks

A research study out of the State University of New York College of Environmental Science and Forestry (SUNY-ESF) is collaborating with Fahnstock State Park and Wonder Lake State Park in Putnam County to look at predator populations as part of an ongoing study of the declining population of New England cottontails (NEC), Sylvilagus transitionalis. NEC is a rabbit native to the northeastern U.S., but studies indicate that in the past decade, the population of NEC has decreased by as much as 50%. Some populations of the cottontails are in New York State Parks, and learning more about best management practices is critical to protecting this species.

As the New England cottontail (NEC) is a declining species being considered for listing on the federal Endangered Species Act, there are a lot of ongoing efforts to create habitat for these rabbits in the Northeast. The hope is these efforts will preemptively restore populations of NEC in the region, making it unnecessary to list the species as endangered.

The two greatest contributing factors to the decline of NECs are loss of habitat and the introduction of the Eastern cottontail, Sylvilagus floridanus. While the two cottontail species are almost identical in appearance, the Eastern Cottontail generally outcompetes NECs for food and habitat, edging the native species out of its former range. While loss of habitat and the introduction of the Eastern cottontail are both factors contributing to the decline of New England Cottontail, this study looks at predation in conjunction with other management practices.

Predation accounts for almost all natural mortality in NECs. As such, increases or decreases in the predator community would have serious consequences for the cottontail population. Most management projects have focused on enhancing habitat for NECs, but this study considers whether those projects might have the unintended consequence of altering the predator communities in such a way that cottontail survival is reduced. If that’s the case, then it will be necessary to consider predator management strategies when managing habitat for NEC. Results from this study will help inform habitat managers and recover NEC populations.

The project, led by PhD student Amanda Cheeseman and Dr. Jonathan Cohen, both from SUNY-ESF, together with Scott Silver of the Wildlife Conservation Society and Putnam Highlands Audubon, uses trail cameras targeting mammal predators, in combination with visual and auditory surveys for hawks, owls, and eagles, to examine predator communities in areas where different ways of controlling and managing NEC habitat are already being practiced. The project is taking place across multiple sites in Putnam and Dutchess counties. The pictures above were taken in Fahnstock State ParkThe information from the predator study will be compared to data from radio-collared cottontails in order to get a complete picture of the predator-prey relationships in New England Cottontail habitats.

featured image is of the New England Cottontail, Sylvilagus transitionalis, by Michael Merchand, NYNHP