Hudson Valley of New York, in the northeastern United States, is one of the
most complex and diverse river ecosystems in America. Striking the proper
balance between public use and protection of this unique natural resource is a
major challenge. That is the focus of Hudsonia, a nonprofit organization that
promotes scientific research, policy analysis and better public understanding
of the Hudson River environment. VOA's Adam Phillips reports.
nearing sunset, and Erik Kiviat peers through his binoculars at the riot of
animal and plant life on Tivoli South Bay. The 100-hectare bay is a small inlet
off the Hudson River, the great eastern New York state waterway that flows more
than 500 kilometers south out of the Adirondack Mountains, through the state
capital at Albany, on to New York City's harbor, and out to the Atlantic Ocean.
a biologist, is cofounder and director of Hudsonia. From his
place within the reeds, he sees a complex natural ecosystem: great egret birds,
small killifish, dragonflies, beetles, frogs, wild rice, bulrushes, yellow iris
and scores of other animal and plant species. He also sees train tracks, river
barges and other signs of the Hudson River's important role over the past three
centuries as a major commercial artery.
points to the water chestnut leaves covering most of the bay's surface as an
example of how human activities have changed the river's ecology.
been in North America for maybe 150 years, and it does very well in these
shallow, sunny, nutrient-rich alkaline bodies of water that are so common
around human habitations," he says.
adds that the successful acculturation of so-called "invasive"
species, like water chestnut and
spatterdock, has been accelerating in recent decades due to the globalization
of commerce and other human activities that transport plants and animals and
fungi back and forth from one part of the world to another.
organization is dedicated to two separate yet allied purposes: solid
environmental research of the Hudson watershed and the enlightened use of the
region's environmental resources. The two often appear to conflict. For
example, Kiviat acknowledges that people often are upset by any visual change
to a landscape with which they are familiar. On the other hand, change is a
given in any natural environment. Sometimes that change is slow. Sometimes it
knows well that public responses to any change can vary widely. For instance,
those who love the aesthetic quality of open water may dislike the blanket of
water chestnuts that has covered most of Tivoli South Bay over the past half
century. Recreational fishers, on the other hand, know that the underwater
stems of the water chestnut are a favored habitat for snails, insects and other
invertebrates, which help to attract fish.
"And at the same time," says
Kiviat, "[due to the density of the plant's stem systems] there isn't much
dissolved oxygen under that water chestnut in the summer. So the fish can't get
in there very effectively to eat all that good stuff that's in there waiting
adds that just as human actions over the years have disturbed the Hudson ecology,
they can also help now to bring it into better balance. Kiviat and some of his scientific colleagues
who are interested in Tivoli South Bay say it should be possible to break up
its 90 hectares of water chestnut into smaller patches interspersed with
shallow open water.
way," he says, "we would, in theory … get some more dissolved oxygen
into the water, make some space for fish, let the fish get into all that good
food that's in the water chestnut, and then let people who fish – the fishers –
get to the fish."
scientists conduct extensive field research up and down the river, often with
the assistance of environmentally conscious local volunteers. That fieldwork
forms the basis of the group's recommendations for more sustainable and
responsible management of the Hudson.
Still, Kiviat emphasizes that Hudsonia is not an advocacy organization
in the sense that they don't take sides in land-use planning controversies.
don't say 'This is a project that should or shouldn't be built on this
particular site,'" he says. "We try to take good scientific data
about our environment and about people, and then we use that information to
help people do a better job of doing the things their community
is doing that through its Biodiversity Resources Center. The center creates detailed habitat maps
that help local policy-makers and the public in town development and
conservation planning. Hudsonia's
research and education division keeps a watchful eye on the area's wetlands
and waterways.It also supports
preservation efforts for threatened species, such as the Blanding's Turtle.
Still, challenges such as climate change, invasive species
and human-caused contamination continue to threaten the ecology of the Hudson
Valley region. While good science and timely planning may help mitigate the
worst dangers, prospects for the overall health of the Hudson Valley are