Tsawwassen – home to big isopods, eelgrass and crabs

June 18th, 2014Blog0 comments

College of William & Mary undergraduate Danielle Hall

by Danielle Hall (College of William & Mary undergraduate student, ZENtern)

After three days of intense lab preparation and field work, the first ZEN2 site has been completed!

I arrived in British Columbia late on May 15^th and the next day we got straight to work. After prepping materials in the lab we hopped in the lab truck and headed to our field site in a town outside of Vancouver called Tsawwassen. This particular site is in an intertidal zone and we chose to work on the lowest tide of the year since, during any other time, the site would be submerged and difficult to access.

To get to the site we climbed down over two hundred steps. Next, in our fashionable rubber boots, we hiked our way through the mud to get to our site (a treacherous task since the mud had a habit of clinging to our boots). On more than one occasion help was required to extricate a sunken foot.

I was amazed at the size of the Zostera shoots. They were nearly twice the size of the eelgrass in my home field site in Virginia! Not only were the shoots large, but the isopods were comparatively gigantic as well.

Marking experimental plots in the eelgrass bed in Vancouver, British Columbia

I was joining on day two of the field work and so the 20 experimental plots were already marked with orange flags. On this day, our job was to deploy the predation assay. The purpose of this assay is to understand the relative predation rates across the different ZEN site. The experimental units, or ‘PTUs,’ consist of a piece of bait tethered to an acrylic rod. The baits ranged from local animals, like the giant isopods, to a standard control, a piece of cut dried squid. A PVC quadrat helped visualize where to place our PTUs.

A hermit crab crawls along the eelgrass bed in Vancouver, BC

Having spent several summers helping deploy previous ZEN projects in the Chesapeake Bay, I was very curious to discover the differences in eelgrass beds between the two coasts. Here, anemones abounded right on the eelgrass shoots. I was amazed that they were able to make a living on plant tissue since in all my past experiences I had only ever seen anemones attached to a hard substrate (There are anemones living in eelgrass beds in the Chesapeake Bay as well, but they are generally small and scarce.)

Nudibranch

Our lab group got particularly excited about a pair of nudibranchs who then became the stars of a Hollywood-esque photoshoot. Meanwhile a bald eagle joined us for a bit, clearly finding a tasty meal within the seagrass.

The BC team poses with a Dungeness crab found in the eelgrass bed

Our second day in the field was filled with surprises. After recording the results of the predation assay (the bait was either gone – eaten, presumably – or present), we continued with collecting samples. After combing through the plots at least two times, Celine – another ZEN participant – uncovered quite a surprise: a huge Dungeness crab hiding in the mud! And he was not too happy that we were intruding in his home. One of the other women, Jemma, mustered up the guts to pick up the feisty crab, and we all gathered around to take a picture with our new friend.

The ZEN team in BC hard at work

Day two was a long afternoon of working in our plots. So long in fact that the tide decided to turn despite the fact that we still had half our plots to process. A race ensued. We were optimistic. The tide was persistent. We lost. I was in the process of taking sediment core samples when I noticed the tide line getting ever so close, though I was determined to finish. When I peeked over my shoulder, I decided I could finish three more plots. I didn’t even finish the one I was on.  Soon water was rushing into our site.

Danielle (left) and the BC team celebrate a successful ZEN sampling

I abandoned my own task to help others finish collecting algae. We developed an effective method of the two hand scoop, where we quickly ran both hands through the plot to work like a sieve. Soon the water engulfed our boots which was followed by multiple exclamations, but together we finished all the plots. Looking towards the shore, our samples and coolers were being carried by the tide. It took all our effort to traverse back to the shore, and on the way retrieve the heavy, runaway samples.

Danielle is a rising senior at the College of William and Mary. As a ZENtern she will be working with the lab of Dr. Mary O’Connor at the University of British Columbia in Vancouver, as well as back at the Virginia Institute of Marine Science with Dr. Emmett Duffy’s Marine Biodiversity Lab during summer 2014. She has been volunteering in Dr. Duffy’s lab for the past two years and is from Massachusetts. Aside from her passion for science, Danielle is an avid dancer.

Thankful for my day job

November 29th, 2012Blog0 comments

Pamela Reynolds, ZEN Coordinator

by Pamela Reynolds, ZEN Coordinator

This past week in the States we celebrated the Thanksgiving Holiday, which encouraged me reflect on all that I am thankful for – family, friends, and great colleagues near and far!

Continuing along the theme of creative collaborators, a film recently sent to me from grad student Ross Whippo in ZEN partner Dr. Mary O’Connor’s lab at the University of British Columbia in Vancouver, Canada, reminds me what a great career I have as a marine ecologist. What does your lab do?