Feeds:
Posts
Comments

Posts Tagged ‘ecology’

After millions of years in the air, birds might be a bit insulted that they’re blamed for downing planes when one of these giant metal leviathans hurtles into their flock. I mean, imagine a whale crash landing into your bicycle parade and then complaining of “bike strikes.”

Still, many people have asked for links to learn more about bird strikes, and the estuary birds of our region. So here’s a quick link list!

BIRD STRIKES:

Nonprofit:

http://www.birdstrike.org/events/signif.htm

FAA:

http://wildlife-mitigation.tc.faa.gov/public_html/index.html

Rotors:

http://www.flightglobal.com/articles/2008/11/21/319198/bird-strike-emerges-as-open-rotor-concern.html

 

BIRDS OF NYC:

NYC Audubon:

http://www.nycaudubon.org/kids/birds/

NYC Birds:

http://www.nycbirds.com/

Brooklyn Bird Club:

http://www.brooklynbirdclub.org/trips.htm

Cornell University Database:

http://www.birds.cornell.edu/

 

And now a hot apple cider toast to the pilot! Let’s hope the authorities focus on better detection and avoidence and not fewer birds!

Advertisements

Read Full Post »

 

Neighborhoodcats.org photo of JFK cat protest.

Neighborhoodcats.org photo of JFK cat protest.

by Erik Baard

Australia is learning that it’s traded one form of “cute overload” for another, and there might be lessons for New York City.

 

As reported in this article, Australia attacked its cat overpopulation problem in the interest of preserving its indigenous bird species. The trouble is, without the feline predators around, a rabbit population explosion ensued, stripping away ground foliage needed for safe bird nesting.

 

The conflict between cat lovers and conservationists, which is often an inner one, spans the globe. In NYC it’s found focus on Jamaica Bay and the JFK Airport. Emotional pleas and conservation science studies have crashed upon walls of bureaucracy in recent years as airport officials cleared out a stray cat population. One ironic twist is that some airport managers have claimed that the cats are attracting birds, with their food and feces, and posing a hazard to planes. While bird strikes are very real, environmental concerns on Jamaica Bay center on ground nesting birds.

 

Cats are the flashpoint where empathy and responsibility crash in on themselves.

 

We feel for the cats, cast off in a breach of our social contract with them as a companion species. Activists might have a point in calling the feral ones, though born outside of human housing, “homeless.” That’s certainly true for abandoned pets. But we also grasp the suffering that attends habitat loss and losing young, as birds and other small species struggle to hold on under assault from feline predators.

 

Our sense of responsibility is weighty because we’ve both marginalized local species to a fringe of habitat and introduced an effective predator.

 

The greatest point of consensus is that cats should be adopted only responsibly (for life, and neutered), and that they should be kept indoors. But in cases where colonies already exist, sterilization and reintroduction seems is the most humane and effective means of dealing with the cat population. Infertile cats will still hold territory, preventing a rapid repopulation of the area by breeding cats from adjacent neighborhoods. With rats, another species that’s forever the subject of population control schemes, denying food helps disperse a population and keep them busy seeking sustenance instead of breeding. When social animals have a central food source, they gather and find mates, and have the surplus energy to breed and bear young.

 

Just ask the rabbits down under!

Read Full Post »

by Erik Baard

Eastern White Pines. Photo by US Fish and Wildlife Service.

Eastern White Pines. Photo by US Fish and Wildlife Service.

 

 

Far inland, a wind

lifts fine snow from ancient pines.

Shimmers like sea spray.

 

 

I wrote that haiku twenty years ago intending to show the sensual commonality of contrasting locales, pointing toward our shared experiences across superficial cultural divides. Only today, while poking around data piles about pines in this tanenbaum time of year, did I learn of the deep connection Eastern White Pines once had with the ocean.

 

Within twenty years of landing on the Eastern White Pine-spired shores of New England, the Pilgrims were exporting trunks for ship masts to ports as far away as Madagascar. The New World, from Nova Scotia to Georgia and out west to Minnesota, boasted Eastern White Pines standing over 80’ (24m), with reports of individual trees soaring up to 230’ (70m). Though this species is the tallest pine in North America, healthy ones are also pin straight.

 

As the colonies grew, so did competition for use of Eastern White Pines. In no mood to pay market rates for its materials, the British government carved the trunks of choice trees with the “broad arrow,” reserving them for Navy ships and exacted heavy penalties from violators. Colonists came to resent that heavy-handed claim on their assets and began falsely marking lesser stands while selling the navy’s best as more profitable lightweight, strong, knotless, and pale (hence the tree’s name) plank wood. Though it’s little remembered today, friction over the issue contributed to revolutionary sentiments among New Englanders. During the vicious “Pine Tree Riot” a sheriff was lashed with pine switches and his horses were maimed. One might say the Minute Men thumbed their noses at the crown by putting an Eastern White Pine in the white canton of their flag, where the cross of St. George used to be.

 

You can still see a broad arrow carved into white pine in New York City today, but not in a way one might expect. The pinewood door of an 18th century mansion belonging to the wealthy, rebel Blackwell family of western Queens bears the mark from a British soldier’s saber as a sign of punitive confiscation. The house has long since been demolished, but the door (with melted bottle windows in a neat bit of early recycling) is on display at the Greater Astoria Historical Society.

 

The rapid growth of the new United States was fed by raging deforestation. Henry David Thoreau was troubled: “The pine is no more lumber than man is, and to be made into boards and houses is no more its true and highest use than the truest use of a man is to be cut down and made into manure,” he wrote in Autumn

                                                                                        

Of course, human appreciation the Eastern White Pine long precedes that European imperial tussling and Yankee commoditization. Native Americans depended on the trees for much more than their wood. Their Vitamin C-rich needles can be made into a tisane, or “herbal tea.” The inner bark, called the cambium, can be beaten into a flour extender in hard times. Cones can be stewed and the seeds are edible. The sap, resin, and tar have medicinal value. Resin can be used to waterproof materials, from baskets to boats.

 

Across a wide swath of North America, Eastern White Pines feed white-winged crossbills (whose bills are specialized for prying open cones), pileated woodpeckers, flying squirrels, red squirrels, beavers, snowshoe hares, porcupines, mice, rabbits, and voles. Bald eagles, moths, chickadees, morning doves, common grackles,and  nuthatches shelter in them when they stand, while in fallen trees you’ll find woodpeckers and hibernating black bears nesting. They become such a bedrock of the ecosystem because they efficiently spread seeds by wind and mature trees are somwhat fire resistant.

 

Sadly, it’s tough to find what naturalists reverently call the “virgin whites,” specimens aged over 350 years. After centuries of rampant exploitation (and vulnerability to blister rust that’s carried by cultivated ribes) we’re beginning to make restitution. A few mature stands can be found within the boroughs, notably along the Kazimiroff Nature Trail in Pelham Bay Park in the Bronx and at the Jackson Pond pine grove of Forest Park in Queens. In northern Manhattan, visit Inwood Hill Park near Payson Street. Look for tall, blue-green pines with finely serrated needles measuring between 2” and 5” (5-13cm), and bundled in groups of five. The cones are soft and slender and about 5” long. For me, the most beautiful part of this tree is its almost fractal expression: branches, needles, and cones all spiral in a Fibonacci sequence.

 

Here’s a great little video lecture snippet:

 

 

 

Conifers like the East White Pine are marvelously well adapted to snow and cold. The smaller and more numerous needles (compared with typically broad, deciduous leaves) remain evergreen and exceptionally dark to absorb maximum sunlight in the dim northern winter. Photosynthesis isn’t the aim in the dormant season, but rather simple heat, because like humans, trees survive best in a limited temperature range. With few pores and a waxy coat, they also retain water well. Unlike the skyward reaching branches of some species, their branches angle downwards before curling up at the end, to slough off snow before the weight can cause damage.

 

 

Future generations of New Yorkers will enjoy more Eastern White Pines than we do. It’s a core species of the Million Trees NYC drive. A crew of volunteers from the LIC Community Boathouse was happy to plant white pines in Floyd Bennett Field under the guidance of Friends of Gateway. Our little Charlie Brown Christmas Tree-like saplings surrounded dying Japanese black pines, which were planted under a “Beautify America” program spearheaded by Ladybird Johnson. Those exotic transplants are falling to the blue stain fungus, which doesn’t affect indigenous white pines, explained Dave Lutz, chair of Friends of Gateway. Earth Day NY rounded up people to plant some more for the NYC Department of Parks and Recreation this autumn and I was glad to participate. Another recent “Million Trees” planter of a white pine was Carl XVI Gustaf, the King of Sweden. Volunteer tree planters are needed.

 

For an urbanite, the greatest value of a stand of Eastern White Pines might be spiritual, in a way that transcends any one religion or the Christmas holiday. As Thoreau wrote, “I saw the sun falling on a distant white-pine wood…It was like looking into dreamland.” When we look upon the tree for itself, and not for its uses, the effect is immediate and the cause is clear for why the Haudenosaunee (Iroquois) people called this the Great Tree of Peace.

Read Full Post »

by Erik Baard

If a seal falls ill in the Gowanus Canal, a turtle catches an autumnal chill in Montauk, and a dolphin gets marsh bound in the Great South Bay, there’s a good chance they’ll end up as roommates at the Riverhead Foundation for Marine Research and Preservation.

As New York State’s only authorized marine mammal and sea turtle rescue group, the Riverhead Foundation is called upon to perform rescues and verify unusual sightings throughout the southern New York salty shorelines — the Long Island Sound, Atlantic Ocean, New York Bight and New York Harbor. The small, overstretched staff is like an aquatic A-Team housed within the Atlantis Marine World Aquarium, a well-run regional attraction where sting rays poke up to kiss you right upon entering the door. Really. Well, okay, and be fed.

 

raykiss

(This photo and those following, unless otherwise specified, were taken by trip participant Sofia Theologitis.)

Our Nature Calendar group of five was ushered into the back rooms where the Riverhead Foundation does its work of assessing, monitoring, and healing animals held in cylindrical tanks for eventual release into the ocean or transfer to another aquarium. The most frequent guests are seals and turtles (we saw about ten of them, representing a mix of species that including harbor seals and a loggerhead turtle that had arrived an hour before us), though dolphins and porpoises are regulars too.

(I learned about the foundation eight years ago when I was with a pod of fellow winter kayakers who confirmed Harry Spitz’s sighting of the first community of seals in New York Harbor in 120 years, and wrote about it for the New York Times.) 

You’ll know that turtles are in residence if upon stepping off the decontamination shoe pad you’re hit with a wave of warm, moist air. Some “cold stunned” turtles appear dead because they’ve been immobilized by temperature drops, before they could migrate to warmer waters.

“They get washed ashore like any other debris,” said rescue program supervisor Julika Wocial, who trains the public in making proper sighting and stranding reports . “Don’t assume a turtle is dead unless it’s decomposed or missing a head.”

Other turtles can’t dive well because of trapped gas pockets in their shells. This makes it hard to feed, leaves them vulnerable to predators and boat injuries, and above-surface shells sections can degrade with prolonged air exposure (as with the patient below). A bubble can be drained, but evenly distributed gas is a challenge. Sometimes weights are added, or the turtle is found unfit for release.

Flipper injuries like the one photographed below were common (suspected shark bites) among turtles, as are propeller lacerations. Even double rear amputees can survive in the wild, explained Robert DiGiovanni Jr., director and senior biologist at the foundation.

floater

 gimp4

Whirl pools at the center of seal tanks mimic ocean currents and combat muscle atrophy.

Seal pox further weakened a few already struggling pinipeds. The viral disease, which isn’t transmittable to humans, runs its course with the severity and duration of our experience of chicken pox. Instead of many small pustules dotting the skin, however, seals get several larger, hard knobs near their faces and flippers.

Seal pox lesion.

Seal pox lesion.

Perhaps more surprising was how common eye injuries are among seals. Of course, those at the foundation were being rehabilitated and weren’t representative of the general population. It makes sense, however, that seals would often get bitten or poked around the eyes as they rooted around the seabed.

seal1

The staff takes special care to not bond with the animals, so that they retain natural behaviors and a healthy aversion to humans upon release. As social mammals with expressive faces, seals make this particularly difficult. Well, at least for me. The female seal I photographed below and I had some immediate chemistry. Ms. Wocial mildly reprimanded me for lingering and chatting with this pirate-eyed beauty.

ladylove

 

Staff and highly-trained volunteers work together in both rescues and releases, with the latter being sometimes nearly ceremonial. Sponsors who “adopt” seals and turtles come out, as do reporters and other friends of the foundation. Sometimes a dolphin must be gently ushered out of its tank by a wall of staff and volunteers wearing dry suits, with arms interlocked. Slight injuries, sometimes quite painful, are common among the humans.

Costs for rescue, rehabilitation, and release range from $6500 for a seal to $120,000 for a dolphin. Medical machines are always needed, Mr. DiGiovanni said, and often come through hospital donations. One recent acquisition greatly improving the Riverhead Foundation’s field work is a portable unit to test for blood gases, electrolytes, and glucose levels.

Released patients of the rescue hospital have paid back their human tenders with unprecendented revelations. Tracking devices on their backs have mapped migration patterns, not only north-to-south, but inshore and offshore, where deeper waters have steadier temperatures, according to Mr. DiGiovanni. The foundation doesn’t necessarily deliver animals to places near their rescue locations because they usually swim hundreds or thousands of miles within weeks or months of returning to the wild.

Our own path was more predictable. As people now contaminated by seal pox, we were slipped out the back door. Our hosts apologized for the necessity, and stopped short of making us wear leper bells.

GET INVOLVED

ADOPT” a rescued animal, make a cash or in-kind DONATION or become a MEMBER.

(One trip participant, Neena Dhamoon, is already raising funds from officemates, friends, and family!)

To volunteer, please email: volunteers@riverheadfoundation.org

(Different skill levels are needed, ranging from basic office help to *gentle* dolphin wrestling, after much training.)

Read Full Post »

Bumblebee on an eggplant flower East Harlem. Photo by Kevin Matteson. 

 

by Erik Baard

 

There can be no local foods, community garden, and green spaces movement in New York City without a healthy bee population, and that’s a resource we could lose. Our first defense is simply to look a little more carefully at our backyards and gardens.

 

Bee Watchers 2008 wants to train you to observe bees with free sessions in all five boroughs: at Alley Pond Environmental Center (May 19, 6PM), Central Park’s North Meadow Recreation Center (May 21, 6PM), the Greenbelt Nature Center (6PM, May 20), Prospect Park Audubon Center (May 21, 6PM), and Ranaqua, the Bronx headquarters of the NYC Department of Parks and Recreation (May 22, 6PM). You’ll also be equipped with five native New York flowering plants and a sunflower.

 

For an informative flyer and contact information, click here:

bee-flyer-may-9

 

Being a Bee Watcher is fun, but this is also an urgent mission that has the backing of the Greenbelt Native Plant Center, New York City Urban Park Rangers, and the Center for Biodiversity and Conservation at the American Museum of Natural History.

 

“We’ve already lost some species. At least two bumble bee species that used to be quite abundant haven’t been seen in years,” said Elizabeth Johnson, manager of the Metropolitan Biodiversity Program at the American Museum of Natural History.

 

“At this point we’re trying to drum up business for bee watching,” added Kevin Matteson, a Fordham University biologist conducting the program.

 

A third of human food stocks depend directly on the services of pollinators, which include insects, birds, and mammals. In the northeast, we rely on bees most (like the bumblebee pollinating an East Harlem eggplant in the photo by Matteson above – click to enlarge). New York State boasts about 423 species. 

 

“Most people have no idea that we have so many local species. They’re amazed at the metallic shiny green ones, the blueish ones. It gets people excited,” Johnson said. (If you happen to spot a bee or other insect that fascinates you, drop a note to wildeyed@naturecalendar.com and we’ll share your observations with readers.)

 

While 219 species have been spotted living in NYC (54 in East Harlem and the South Bronx alone), nearly a fifth of those aren’t native, according to Matteson.

 

The mysterious population collapse of the honeybee, a species imported from Europe aboard sailing ships, has gotten considerable media attention, and rightfully so. But habitat destruction and exotic diseases could pose a great threat to our indigenous partners in sustaining edible and flowering local plants.

 

“We don’t know a lot about most of our native bees. Where do they live? What kinds of habitat needs do they have? We have a lot to figure out about pollinator service and it would help to know how quickly bees show up at their plants in the Spring, and how often, and then correlate that with surrounding land use,” Johnson explained.

 

The honeybee is an exceptional species not only for its production of the syrupy sweets, but for its large colony combs, which are occupied for years. They even huddle for warmth in winter. Most bees live in less enduring groups, or even in relatively solitary fashion: a queen might never see her offspring, laying eggs and sealing them off with provisions before moving on. Many burrow underground or bore into wood, crawl into hollow twigs, or even take over abandoned mouse holes.

 

Development often wipes out bee food sources like wildflowers or even invasive flowers. Paving also eliminates burrowing species from an area.

 

Your community garden or backyard is an oasis in the asphalt desert, but you might see fewer flowers, fruits, and vegetables because a building has gone up on what was a weed-strewn lot a block or two away. A green roof with plants that support bees and butterflies might compensate for that loss, but you won’t get it unless you’re armed with data supporting your case.

 

For the sake of your community’s green spaces, join Bee Watchers 2008 by calling Kevin Matteson at 646-3730250 or emailing him at kevmatteson (at) gmail.com.

 

Read Full Post »