Engaging Youth in the Environment Is Focus of 36th Annual BAEER Fair on January 19

The 36th annual Bay Area Environmental Education Resource (BAEER) Fair is just around the corner on Saturday, January 19, 2013. This resource-rich event is designed for teachers, community educators, students, families and all concerned about the environment we share.

Drop by MMWD’s booth for information on our free school education programs in water conservation and watershed ecology and restoration.

For those 18 or older, sign up for our Frog Docent training on March 2. The foothill yellow-legged frog is native to parts of the Mt. Tamalpais Watershed and is listed as both a federal and state species of “special concern.” MMWD needs help from the community to stop the decline and help restore a healthy population within the watershed.

For those eight years or older, sign up for our Turtle Observer training on March 23 to help us monitor and record activity of California’s only native fresh water turtle, the Western pond turtle, a federally listed “vulnerable species.” This program is great for students, families or individuals.

The BAEER Fair is from 10:00 a.m. to 4:30 p.m. at the Marin Civic Center located in San Rafael. General admission is $12.00, high school students and seniors $10.00, youth $8.00 and children 6 and under are free. Admission to the event is paid at the entrance door. Check out the BAEER website to learn more about the 2013 workshops and exhibitors, and visit MMWD’s website to discover our free water education programs for schools in our service area.

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The Western Pond Turtles of Mt. Tamalpais

by Ben Schleifer

When I go on a hike, I always hope to see a rare species of animal. Usually, these evasive animals can hear me coming from far away and avoid my heavy footfall, but on those seldom occasions I do see one, I feel like I have experienced something special. Most people go their whole lives without seeing a bear, or a moose, or a bald eagle in the wild, and knowing I have seen those makes an exhausting outdoor trip seem worthwhile. Still, you do not have to travel on a tiring journey to see a rare species of animal. There are many in and around Marin, and if you have ever been to the reservoirs of the Marin Municipal Water District you might have seen one or two. The Actinemys marmorata, or western pond turtle, is one of those subtle rare species that might have escaped your notice.

Western pond turtle at Carson Falls
(photo courtesy of Lorri Gong)

These brown-to-black turtles are found in ponds and lakes all over western North America. Their only truly distinctive characteristic is a motley yellow and brown neck, so unless they are basking on a warm spring day, they are not easy to identify. Still, the western pond turtle is the only native freshwater turtle in California, and they are species in decline. They are recognized as a vulnerable species in California. Their dwindling numbers are in part due to loss of habitat and competition with other, invasive turtles like the red-eared slider. Both western pond turtles and red-eared sliders are found on the reservoirs of MMWD, which has been implementing practices to help protect our native California species.

Scientists at MMWD have been monitoring the turtle populations of both species since 2003. In 2009 an AmeriCorps intern suggested the district set up a program to monitor these turtles with citizen scientists—an idea that has now been implemented for the last three springs. AmeriCorps interns at MMWD, like myself, train volunteers in turtle identification and data collection. Then these volunteers walk around the beautiful lakes of MMWD collecting observations. We have Turtle Observers ranging from seven years of age to seventy years of age, and they are all contributing to our knowledge about these turtles on the watershed.

A native western pond turtle flanked by two non-native red-eared sliders at Phoenix Lake
(photo courtesy of Lorri Gong)

In 2012, our Turtle Observers made 41 visits for 76 hours of observations at the MMWD reservoirs. They made 327 individual turtle observations, and from these observations, we estimated the reservoirs have seven western pond turtles and 27 non-natives. These numbers will help the scientists at MMWD know where to focus their turtle-trapping efforts to remove the invasive turtles. The Turtle Observers also informed countless hikers and bike riders about the native and non-native turtles, and shared with some lucky visitors the experience of seeing a rare species.

We train new Turtle Observers each spring. If you or a young budding scientist you know would like to take part in the amazing outdoor field science of turtle observing, please contact MMWD at volunteerprogram@marinwater.org.

If you would like to see how this year’s numbers compare to 2010 and 2011, click here.

I would like to personally thank all the Turtle Observers who turned in turtle report data sheets. It is a testament to what these folks value that they are willing to give their time to protecting and monitoring this native species. Thank you so much to Colin Lester, Sean Tipett, Kathy Tama, Shelly Hauser, Laurel Kelly, Matthew Brod Naeve, Richard Alden Feldon, Marge Gibbs, Eliza and Shelly Peppel, and Lorri Gong.

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“Citizen Scientists” Help Monitor Mt. Tam’s Native Turtles

by Jeff Jablonski

Citizen science is a process that has been going on for centuries. Laypeople often aid scientific research by collecting data across a variety of topics. In recent years, more and more opportunities are springing up for ordinary citizens to get involved in all sorts of projects. I want to highlight one group of volunteers who have been working on Mt. Tam the past few years to help monitor our ecosystems.

MMWD’s Turtle Observer program started in 2009 with the goal of identifying non-native turtles encroaching on habitat of the native western pond turtles in the lakes and streams of the Mt. Tamalpais Watershed. The western pond turtle (Actinemys marmorata) is a federally listed “vulnerable species.” Volunteers are trained to identify western pond turtles and common invasive species like red-eared sliders and cooters. Armed with binoculars and data sheets, they head out to the lakes and creeks of Mt. Tam to count and classify the local inhabitants. This season, observers tracked populations in Lake Lagunitas, Alpine Lake and Bullfrog Creek. On a single trip, as many as 40 turtles were seen basking on logs or swimming in the waters.

Our volunteers allow us to accomplish ecological monitoring far more efficiently than staff could do on our own. The data and observations they contribute help our ecologists to more accurately estimate our turtle populations, better assess the health of the watershed, and make natural resource management decisions.

Volunteer Turtle Observers at work on the Mt. Tamalpais Watershed

Perhaps just as important as the data collected is the fun people can have gathering it. Citizen science is a great way to get out and enjoy nature on your own or with friends and family. The turtle observer program is open to children ages eight and up, and this year almost half of all excursions were made by at least two people. And since the turtles are out when it’s sunny and warm, there is no better time to enjoy a hike or relax by the lake!

Turtle Observers start in March and continue through the beginning of the summer. If you or someone you know is interested in participating, check our website or send an email to volunteerprogram@marinwater.org early next year.

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The Amazing Journey: Turtle Edition

by Eric Ettlinger

When I think of wildlife migrations I think of wildebeest on the Serengeti, gray whales off the California coast, and arctic terns migrating between hemispheres. I definitely don’t think of pond turtles. In fact, having observed the same turtles loafing about in MMWD’s reservoirs year after year, I assumed turtles barely moved from one end of a log to another. But if you observe wildlife long enough, you’ll always gain respect for their abilities.

Checking the smolt trap on Lagunitas Creek

Each spring, MMWD’s Fisheries Department operates a rotary screw trap in Lagunitas Creek near Point Reyes Station, to monitor salmon smolts as they migrate to the ocean. Fish are swept into the trap and funneled into a live box, where they are counted and released each morning. For two months the trap captured migrating coho salmon and steelhead smolts, as well as 13 other species of fish. The trap also captures amphibians, crustaceans, lots of debris and the very occasional turtle. One morning in late April we captured a western pond turtle, which to my great surprise looked familiar. At the edge of its carapace (shell), on the ninth marginal scute (the ninth square on the edge of the carapace, counting clockwise), was a distinctive notch. As far as I know, I’m the only biologist in the watershed marking turtles, so that was likely my mark designating this as Turtle #9. I measured the turtle, took some pictures and sent him on his way.

Western Pond Turtle #9, with arrow showing notch in marginal scute

Back in the office I reviewed the data from six years of turtle monitoring in MMWD’s reservoirs. MMWD began a non-native turtle removal project in 2004 to reduce competition between non-native and smaller, native turtles. In 2004 and 2005 I removed 79 red-eared sliders from Phoenix Lake, outside of Ross. These were provided to a turtle rescue organization that would find new, and hopefully permanent, homes for them. As part of that project, volunteers go out each spring and count native and non-native turtles in district reservoirs to track the ratios of turtle species. Native turtles are once again the majority in two lakes, but non-natives still dominate in another.

Turtle #9 was one of 17 western pond turtles captured and marked in Phoenix Lake while non-natives were being removed. In 2004 his carapace measured 176 millimeters (6.9 inches), and when he was recaptured in 2009, still in Phoenix Lake, he had grown two millimeters. By 2011 he had grown an additional two millimeters and had migrated 16 miles, straight as the crow flies, into another watershed. Of course he didn’t travel straight as the crow flies. His most likely route was to trek one mile west and approximately 500 vertical feet up to Bon Tempe Lake in the Lagunitas Creek watershed, and then down to Alpine Lake. Obstacles from there include Alpine Dam (135 feet high) and Peters Dam (215 feet high), before a turtle can get to the undammed reaches of Lagunitas Creek. By this point Turtle #9 would have traveled over nine miles, with nine more creek miles to go before reaching our rotary screw trap in Point Reyes Station.

Why would a small turtle undertake such a journey? Young males of many species disperse to find open territories, but this was a fully-grown male, from a lake recently cleared of 79 non-native competitors. Maybe he started out looking for new mating opportunities close by and just kept going. Another possibility, although remote, is that he hitchhiked. While that sounds absurd, turtles often get moved around by people. Usually it’s a female, traipsing overland to lay her eggs, that’s picked up by a well-meaning person and put into the closest body of water, which isn’t always where she came from. But someone driving a turtle to Point Reyes Station is an even more implausible theory than a turtle making the journey alone.

Which brings me to the sermon part of this post. Everyone loves turtles, but that love can have consequences for the objects of our affection. When we see a turtle shuffling across dry land, our inclination is often to put it back in the water. This forces the likely heavily pregnant female to start her nesting journey all over again. If you see a turtle on a busy road, help it by moving it in the direction it’s going, but otherwise leave it alone. And if you have a pet turtle that was once cute but is now a large, smelly paperweight, please don’t release it into the wild. Contact the Marin Humane Society instead. You may think you’re sending your turtle on an amazing journey, but along the way it may compete with or spread diseases to our native turtles, which almost always prefer to loaf about in peace.

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Help Protect Mt. Tam’s Native Frogs and Turtles

by Kathryn Deery

Spring on Mt. Tamalpais brings a bright palette of wildflowers, stirring animals, gushing waterfalls and a flood of visitors! Mt. Tamalpais is our backyard, but whose home is it? Two fascinating species that live here are the Foothill Yellow-legged Frog (Rany boylii) and the Western Pond Turtle (Actinemys marmorata). Unfortunately, both species are facing challenges: The Foothill Yellow-legged Frog is a species of “special concern” and the Western Pond Turtle is a federally listed “vulnerable species.”

Foothill Yellow-legged Frog

Little Carson Falls is one of Mt. Tam’s most hoppin’ spots for both Foothill Yellow-legged Frog and visitors. The frogs breed and lay their eggs in and around the pools of the waterfalls—which is also where hikers might tread or where dogs lap up cool water. The egg masses provide a nutritious cradle for the soon-to-be tadpoles but are no match against hiking boots and paws. Human encroachment on frog breeding habitat is one more threat on top of the threat of predators, like rough-skinned newts and non-native bullfrogs.

Western Pond Turtle

Just as the longer, warmer days draw visitors outside, the Western Pond Turtle also comes out to bask on the logs of Lake Lagunitas. Exotic species such as the red-eared slider, a common pet turtle, inhabit the same niche as the vulnerable Western Pond Turtle. The sliders take away food and habitat from California’s only native fresh water turtle. In late spring, the female Western Pond Turtles find a nesting site away from the water and lay eggs in a shallow hole that they cover with dirt. Visitors should keep a sharp eye for turtles and not interrupt their migration.

MMWD is looking for volunteers to help protect these creatures by interacting with the public, monitoring habitat conditions and recording behavior. Join us for frog docent training this Saturday, February 27, and for turtle observer training on Saturday, March 13. Learn species biology, animal observation skills and techniques for interacting with the public. Last year, docents made contact with over 400 visitors. Let’s work together to protect these special species who live on the mountain we all know and love!

For more information please visit our website.

To register for the trainings please email volunteerprogram@marinwater.org or call (415) 945-1128. Frog docents must be at least 18 years old. Turtle observers can be as young as 8 years old if accompanied by an adult.

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