A weekly entry about the life of our estuary and watershed.
Naked Goby. (Smithsonian Environmental Research Center.)
by Erik Baard
Skinny dipping in the Newtown Creek Superfund Site might seem unwise, particularly in February, but it’s a way of life for naked gobies (Gobiosoma bosc). These very small, bottom-dwelling fish of the Eastern Seaboard and Gulf states are extremely common yet rare to see. That’s a shame because gobies — one of the most diverse families of fish, with over 2,000 species — have rich and fascinating lives packed into typically less than four inches and four years.
Ecologists for city, state, and federal agencies did encounter naked gobies in early studies to profile the life and pollutants of what became HarborLAB’s home waterway. They discovered an abundance of goby eggs at the mouth of the creek but not further in, indicating that spawning happened where cleaner East River waters swirled in with each tidal cycle. No surprise given that naked gobies and their eggs and spawn are often found in the fish-protecting screens covering intake tubes at the nearby Ravenswood Power Plant. Bear in mind, however, that this is opposite of the natural state of affairs. Fish normally lay eggs and spawn in sheltered areas outside the swift main channel of waterways. The East River is dredged, constricted by landfill, and edged with bulkheads that make for even faster currents. The slower-moving four-mile stretch of the Newtown Creek should by rights be the East River’s nursery.
As it is, only adult “gobies were prevalent in the mid-section of the Creek,” according to the Fish and Wildlife Service report linked above. Still, what a testament to this species’ hardiness, given that the creek bed (commonly described as being like “black mayonnaise”) is sedimented with toxins and stripped of naked gobies’ natural habitat of oyster beds and salt grass clusters. Females prefer to lay their amber-colored eggs into empty oyster shells. In the Newtown Creek, they make do with rock, crumbled concrete bulkheads, partly interred plastic trash, bottles, and other debris. In the winter, they bury themselves into that poisonous black mayonnaise.
(South Florida Water Management District)
Naked gobies feed on worms and small crustaceans, which concentrate in their tissue the toxins of a century of oil spills, refinery and tannery effluents, and illegal dumping. Cloaked by the muck and the murk, these “naked” prey fish for better known species like striped bass, eels, and bluefish are still taking no chances. The species is scaleless and camouflaged in green and brown blotches. Their eyes are close together, atop the head. At a glance they look like lizards. The young are translucent.
Naked goby pelvic fins have evolved to fuse into suction cups, a neat trick for anchoring themselves. Scientists have noted that gobies can remember how to navigate complicated obstacle courses for at least 40 days, and judge and remember spatial relationships, useful for hopping from tidal pool to tidal pool. Some cousin species of goby have also evolved complex behaviors and symbiotic relationships. For example, one species climbs waterfalls that to human scale is the equivalent of climbing Mt. Everest three times over — check out this video! Others groom the parasites off larger fish. Another enjoys an “Odd Couple” relationship with a large burrowing shrimp. The fish and crustacean cohabitate and deposit eggs in the same burrow. They touch each other (with tail and antennae respectively) constantly to know if the other is agitated or retreating, relying on each other’s complementary senses. And we are still discovering new species of goby!
HarborLAB gives great thanks to Green Apple Cleaners for gently and thoroughly removing salt, mud, grit, and greasy muck from over 50 of our life vests!Some of you might recall meeting company Co-Founder David Kistner and his twins when they volunteered at HarborLAB events!
Our adult and juvenile life vests are used by thousands of people each season in saltwater and on all manner of shorelines. That’s a great way to get really dirty. We need life vests to be clean for our winter Instruction for Inclusion pool program, so who better to ask than longtime supporter Green Apple Cleaners? This pioneering company is the only clothing cleaner in the NYC metropolitan area to use exclusively the methods recommended by the Environmental Protection Agency: high tech, efficient water systems and captured and compressed carbon dioxide. The CO2 is captured from brewers’ emissions and cleaning machines recapture and reuse the gas for several cycles.
The dry cleaning fluid perc (tetrachloroethene, or perchloroethylene) is a common contaminant in soil and water (including at Superfund cleanup sites) and a hazard to human health. This is both a consumer and even more an environmental justice issue because a great number of dry cleaning industry workers are lower-income immigrant people of color. They face ailments and potential ailments ranging from skin and eye irritation to neurological and reproductive problems, organ failure, and cancer. Other methods, like silicon and hydrocarbon, are dubiously marketed as “green.” Silicon accumulates in fish tissue and contaminates water bodies, and “hydrocarbon” is just another name for petroleum products. Who knew “casual Fridays” were protecting the Earth?
Naturally our life vests were washed in low-water machines, not dry cleaned. Clean life vests last longer and Green Apple Cleaners’ slower spin and plant-derived solvents help guard against wear and tear. That saves us money on maintenance and replacement, leaving more funds available for free environmental education programming! We are grateful to Green Apple Cleaners for this service and for using benign methods that reduce water waste and protect our marine ecosystems.
Children’s life vests getting spiffy again at Green Apple Cleaners.
More about Green Apple Cleaners in a CNN report here:
HarborLAB caused quite a stir recently by drawing attention to the fact that the U.S. Environmental Protection Agency isn’t testing plant tissues in the Newtown Creek. This great research gap had not been addressed before. We raised the point at the October meeting of the Newtown Creek Community Advisory Group with the EPA about Superfund progress.
Our concern is informed by our periodic biota surveys. We thank the United Nations Federal Credit Union and Con Ed for their support of our environmental work.
The EPA noted in its presentation that it tests the tissues of some fish species, especially those most likely to be eaten by people, but admitted in response to HarborLAB’s questioning that no plant tests were conducted or scheduled to be conducted. The EPA also asserted that because the creek was so thoroughly bulkheaded, there wasn’t a plant population to test. HarborLAB has conducted bioblitzes of the creek and strongly disagreed, suggesting that nonprofits and universities could begin plant tissue tests even if the EPA wouldn’t. Representatives from Riverkeeper, North Brooklyn Boat Club, and LaGuardia Community College quickly seconded HarborLAB’s concerns.
HarborLAB’s launch already boasts indigenous, salt-tolerant goldenrod, pokeberry, milkweed, and other species that support birds and pollinators. We’re working to add cordgrass, beach plum, and more as part of our GreenLaunch project. Marsh grasses, reeds, and other plants fringe the creek where there are no bulkheads or where bulkheads have crumbled. Above the bulkheads but still within occasional flood zones are a number of plant species, whether native, invasive, or cultivated. There are even fruit trees, including fig, apple, pear, and mulberry. Within the creek, HarborLAB has observed sea lettuce, bladderwrack, mosses, and more.
At the request of LaGuardia Community College biologist Sarah Durand, PhD, HarborLAB has been photographing shoreline and aquatic plants. Dr. Durand and her students have begun growing marsh grass in buckets and planters as experiments in anticipation of installing habitat restoration platforms. We will soon join the Newtown Creek CAG, which counts Dr. Durand as a steering committee member, in formally urging the EPA to reconsider its assessment and add plant tissue testing.
It’s absolutely necessary that the EPA expand testing to include plants and smaller animal organisms, like invertebrates and killifish who spend their entire lives in the creek. These are the complex organism building blocks this blighted corner of the estuary. As Newtown Creek Alliance Mitch Waxman remarked to HarborLAB after the meeting on the narrowness of the EPA’s work: “What the EPA is doing is a human health impact study, not an environmental impact study.”
Gallery of Newtown Creek plants by Thomas Zellers and Erik Baard.
Red algae species spotted at the bottom of the “steps” of the Waste water Treatment Plant nature walk. Also saw some planted Spartina there.
Green moss growing near the end of the Dutch Kills, one of the few green things growing so close to the water line.
You must be logged in to post a comment.