Stewardship and Sampling on Lake Ontario
July 15, 2008
Before leaving dock yesterday afternoon at the Coast Guard Station in Youngstown, NY, teachers aboard the R/V Peter L. Wise Lake Guardian welcomed guest speaker Rene’ Rickard, Tuscarora Environment Office Administrator, who augmented her informative talk about Tuscarora environmental beliefs with artifacts including porcupine quills and a feathered headpiece that are used in cultural activities.

The teachers were impressed by the genuine concern and appreciation that the Tuscarora have concerning the plants and animals in the environment. Rickard encouraged the group to empower their students to become better stewards, through concepts such as “reduce, reuse, recycle” and minimizing our carbon footprint. “Be thankful that our natural world still provides for us,” Rickard said, “and think about what we are leaving for future generations.” As a Tuscarora, part of New York’s Oneida territory since around 1722, she added, “We are very thankful that Mother Earth still provides for us.”
From Mother Earth to Google Earth, visitors to our blog can now follow the Guardian as it charts a course around Lake Ontario. Click the map image below to launch a real-time Google Map outlining the Guardian’s route. (Courtesy of Lisa Matthies, GIS Instructor in Social Sciences at New York’s Erie Community College’s North Campus)
Also included on the map are the numerous field stations where water, mud and bottom sediment samples are being drawn by teachers with assistance from SUNY Environmental Science and Forestry researcher Dr. Greg Boyer and NYSG’s Coastal Education Specialist Helen Domske. Stations range from offshore to nearshore locales including Toronto, Oswego and Rochester. Samples drawn at the variety of stops will help the team of teachers and investigators to make some assessments, such as: What is the difference between the eastern and western Lake Ontario basin? And, how does the nearshore compare with offshore waters?
Water samples are drawn (using a Rosette sampler, as seen, below, in images 1-6) at the various “stations” along the lake (and at different depths - surface, thermocline and one meter off the lake bottom) to analyze chemistry and water quality - factors such as surface temperature, dissolved oxygen, pH, and fluorescence (a measure of algae abundance). Biological studies of the water column involve counts of microscopic phytoplankton - photosynthetic organisms like green algae, cyanobacteria, diatoms and dinoflagellates - and zooplankton, a primary food source for Great Lake sportfish such as walleye and yellow perch.


A Secchi disc, pictured below, is used to determine the water’s turbidity, a measure of clarity.
A Ponar grab (below, in pictures 1-4) helps to pull up mud samples for biologial studies of the Lake’s benthic animals, including worms, snails, crustaceans (shrimp-like creatures) and chironomids (midge fly larvae). But, as you’ll also see below, in pictures 5-8, what comes up most are Zebra and Quagga mussels. SUNY ESF researcher Boyer is seen holding a tray of mussels from just one site sample (picture 5). Back in the classroom, Domske inspects the tray (picture 6) and looks to determine, with the help of Wisconsin Sea Grant’s Jim Lubner (picture 7), which are which - Quagga or Zebra mussels (left to right, picture 8).


While filter-feeder activities of these exotic Quagga and Zebra mussel have helped to increase the Lakes’ water clarity, that in itself has introduced more concerns. For example, clearer water allows more light to penetrate, which in turn makes it more conducive for algae, like the pervasive Cladophora, to thrive, especially in warmer temperatures.
“The problem with Cladophora in Lake Ontario and other coastal waters,” says Domske, “is that when storms cause it to break off, dead sections of the plant pile up near the shore, where they rot and give off an offensive odor.” While the sight of Cladophora may not be pleasant to visitors of the shoreline, it is not harmful to humans.
In the pictures below, (1) Boyer points to Michelle Tabone, a teacher, holding a glass jar with Cladophora and Zebra mussels. The sample was collected during a 6 a.m. field station sample. (2) Cladophora, a common filamentous algae, as illustrated by Cynthia Armstrong for NYSG’s Coastlines.

At some of the field stations, Boyer and the teachers are also gathering box core samples, which provide a more in-depth study of Lake Ontario’s bottom sediments. Boyer is seen below, right, with Domske, showing an example of a recently drawn core sample.
















