So how do trees survive below-freezing temperatures? They can’t move south or generate heat like a mammal. Sure, the below-ground parts of a tree are kept insulated by a layer of snow, and that is important to winter survival, but the exposed parts of a tree are not so protected. » Continue Reading.
Posts Tagged ‘science’
With the onset of winter, downy and hairy woodpeckers become more apparent– knocking away in our woods and stopping by our birdfeeders. With strikingly similar feather patterns, the two can be hard to distinguish if one only catches a glimpse. Both have black wings with white markings; white bellies, sides, and backs; and distinctively white- and black-striped heads. Males of both species have red patches on the backs of their heads, which females lack.
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Animals display a dazzling variety of colors, particularly in the tropics. But even here in northern New England where wildlife diversity is comparatively limited, we enjoy a rich palette of colors and patterns. The majority of colors are produced by pigments–particles of color chemicals found within specialized cells. These include melanins, which are found in nearly all organisms and produce the earthy tones common to many animals (including humans), and carotenoids, which produce colors primarily in the red to yellow end of the spectrum (think northern cardinal and American goldfinch).
What’s surprising, however, is that pigments that produce blue coloration are all but unknown in the animal kingdom, even though we have plenty of blue-colored animals, particularly among birds, butterflies, and fish. So if it’s not pigments, what makes an animal blue? » Continue Reading.
It seems each autumn, I start noticing sunsets more. They are so pink, so orange, so bright. I’ve always chalked up my autumnal sunset attention to my mood shifting with the changing season; perhaps I’m feeling a little wistful at summer’s end and reflecting on nature’s splendor more than usual. But according to the National Oceanic and Atmospheric Administration (NOAA), the colors we see during sunsets really are more vibrant in fall and winter than they are in spring and summer – seasonal melancholia has got nothing to do with it.
The intensity of sunset and sunrise colors has to do with Rayleigh scattering. I spoke with meteorologist Chris Bouchard of the Fairbanks Museum and Planetarium in St. Johnsbury, Vermont, who kindly dropped some knowledge on this scattering business.
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It’s one of the pleasures of fall: walking in the woods on a warm day, scuffing my feet through a deep layer of newly fallen leaves. Looking down, I notice the gold coins of aspen leaves against the bread-knife serrations of brown beech leaves. My feet make that “swoosh, swoosh” sound that takes me back to when I was a kid.
It’s November and the color blast has faded. The woods are gray and brown. The much admired “fall foliage” has drifted earthward to become the more prosaic “leaf litter.” I understand the term, but the word litter grates a little. It connotes trash, yet leaves are just the opposite of trash. Their contribution to forest health, to the ecosystem, is incalculable. They help make the forest what it is.
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A new effort to protect the rare Bicknell’s Thrush by an alliance of North American scientists and conservationists is taking the unusual step of funding a team of Dominican biologists to work in the migratory songbird’s Caribbean wintering habitat.
The Bicknell’s Thrush Habitat Protection Fund at the Adirondack Community Trust has awarded a $5,000 grant to Grupo Jaragua, whose biologists will study the thrush in forested mountains on the Dominican Republic’s border with Haiti. The grant recognizes a need to protect the songbird across its entire range, particularly in its threatened winter destinations. » Continue Reading.
The Adirondack Lakes Survey Corporation (ALSC) recently completed collections of dragonfly larvae in acid rain sensitive Adirondack surface waters in a new study of mercury pollution.
ALSC staff assisted Dr. Sarah Nelson of the University of Maine Mitchell Center and School of Forest Resources, and collaborators at the SERC Institute, Maine Sea Grant, the USGS Mercury Research Lab, and Dartmouth College, who have been developing the concept of using dragonfly larvae as bio-sentinels for mercury concentrations in northeast lakes and streams. Dragonfly larvae or immature dragonflies live in the water for the first year or years of their lives. » Continue Reading.
Applications are being accepted for the training that will begin in January 2013. The program is open to anyone who has an interest in expanding their gardening experience and knowledge. Participants learn to improve their own gardens and landscapes, including scientifically-based gardening information in a relaxed and supportive atmosphere.
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When asked to name the fastest animal on earth, many people will respond “cheetah.” But it is the peregrine falcon – a cliff-dwelling raptor –that holds that title with the ability to reach speeds of 200+ MPH as they stoop (dive) in flight. (The cheetah tops out at a mere 70 MPH).
Equally remarkable is the fact that this speed demon of the skies was nearly wiped out 50 years ago; its recovery ranks among the great success stories of conservation biology and endangered species management.
Historically, the eastern peregrine falcon population was centered in New England and the Adirondack Mountains, ranging south along the spine of the Appalachians to western Georgia. In 1940,the population was estimated at 350 pairs; by the mid-1960s, the species was completely gone from the region, a victim of the devastating pesticide DDT. » Continue Reading.
Here are some objects for the unaided eye for the month of July. All of these objects, although small, should be visible without the help of binoculars or a telescope, so long as you have clear dark skies.
Light pollution is a killer for seeing these objects with your unaided eye. To find out how dark your location is, use the Google Map Overlay of light pollution. If you are in a blue, gray or black area then you should have dark enough skies. You may still be able to see some of these objects in a green location. If you aren’t in a dark sky location you may still be able to see these objects with a pair of binoculars or telescope.
You can find help locating the night sky objects listed below by using one of the free sky charts at Skymaps.com (scroll down to Northern Hemisphere Edition and click on the PDF for July 2012). The map shows what is in the sky in July at 10 pm for early July; 9 pm for late July. » Continue Reading.
The 2012 spring turkey season opens today (May 1) in all of upstate New York lying north of the Bronx-Westchester County boundary. An analysis of the 2011 spring turkey take, including a county-by-county breakdown, can be found on the DEC website. Take figures for the 2011 fall turkey season and county-by-county breakdown can also be found online.
DEC is looking for turkey hunters to participate in their ruffed grouse drumming survey as hunters are ideally suited for monitoring ruffed grouse during the breeding season. Turkey hunters can record the number of grouse they hear drumming while afield to help DEC track the distribution and abundance of this game bird. To get a survey form, go online or call (518) 402-8886. To participate in DEC’s Summer Wild Turkey Sighting Survey or other wildlife surveys visit the “Citizen Science” page of the DEC website. » Continue Reading.
I raised the binoculars to my eyes and stared into the tree canopy above me. Carefully scanning the bare winter branches, nothing out of sorts was noted. I continued down the trail searching for clues that invasive insects may be lurking in the forest.
As Hamilton County Soil and Water Conservation District’s Conservation Educator, part of my job entails monitoring and managing lands and waters for invasive species. I can’t do it alone, and partnerships are essential to detect invasions early and deploy a quick response. Since 2009, the District has teamed up with the United States Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) to survey our forests for invasive insects that cost the United States vast amounts of money in economic and ecological damage each year. » Continue Reading.
Do you have questions about the connection between last year’s flooding and global climate change? Are you skeptical about the causes of climate change? Are you looking for options to cut your energy bills and reduce your dependence on fossil fuels?
An upcoming Community Climate Forum is expected to address all of these issues, and more. The forum, sponsored by the Wildlife Conservation Society (WCS) Adirondack Program and the Adirondack Green Circle, is scheduled for April 22, from 4 to 6 p.m. at the Pendragon Theater in Saranac Lake. » Continue Reading.
When bird watchers joined this year’s Great Backyard Bird Count (GBBC), they recorded the most unusual winter for birds in the count’s 15-year history. With 17.4 million bird observations on 104,000 checklists, this was the most detailed four-day snapshot ever recorded for birdlife in the U.S. and Canada. Participants reported 623 species, during February 17–20, including an influx of Snowy Owls from the arctic, early-migrating Sandhill Cranes, and Belted Kingfishers in northern areas that might normally be frozen over.
“The maps on the GBBC website this year are absolutely stunning,” said John Fitzpatrick, executive director of the Cornell Lab of Ornithology. “Every bird species has a captivating story to tell, and we’re certainly seeing many of them in larger numbers farther north than usual, no doubt because of this winter’s record-breaking mild conditions.” » Continue Reading.
When entomologist James Needham arrived in Upper Saranac Lake in 1900 on a mission to study Adirondack aquatic insects, he found no room at the Saranac Inn. For the first 10 days, Needham, State Entomologist Ephraim P. Felt, and their assistant Cornelius Betten, were forced to find lodging two miles from the Adirondack Fish Hatchery where they hoped to “collect and study the habits of aquatic insects, paying special attention to the conditions necessary for the existence of the various species, their relative value as food for fishes, the relations of the forms to each other, and their life histories.” Although their study was short, it was also a historic first, up until that time all that had been written about Adirondack aquatic insects amounted to a few short paragraphs by former State Entomologist J. A. Lintner (1889).
The daily trek to their study area didn’t diminish their enthusiasm. “I arrived at Saranac Inn on the evening of June 12m and at once began looking over the ground,” Needham recalled. “Dr. Felt came on the 14th, and spent the day with me canvassing the situations to be studied… and the regular work of the session was at once begun, to be continued without cessation to the date of closing [on August 20].” The study session was the first of a comprehensive study of aquatic insects in the state funded by the NYS Museum that also included short surveys in Old Forge and Lake George, and two additional trips to the Saranac Inn.
Needham and Felt identified a number waters to be studied. They were provided by the hatchery a space to work, the use of several hatching troughs for insect breeding, a carpenter bench and tools to build specialized breeding cages, and a small boat. They brought with them or acquired additional equipment necessary to sweep vegetation, raise insects, and store their collections. “Extensive use was made of white wash bowls, soup plates and saucers in the examination of our catch,” Needham reported.
The entomologists chose Little Clear creek on the hatchery grounds for their study area, which proved to be the most fruitful, but also the hatchery’s three fish propagating ponds, Little Clear, Little Green, and Bone. Twice they made trips to Lake Colby, Stony Brook (just north of Axton) and St. Regis, at the end of the carry from Little Clear, and the first week they spent mornings and evenings at Lake Clear.
The study they produced, “Aquatic Insects of the Adirondacks” (NYS Museum Bulletin 47, September 1901, link to pdf), proved to be the most important study of the subject for more than 100 years. It was one of the first truly scientific studies of aquatic insects in North America, and yielded life histories of more than 100 species, the discovery of 10 new species and and two new genera, plus additional information about Chironomidae dragon flies.
Needham, who studied under renowned entomologist John Henry Comstock (1849–1931), was then refining his pretracheation insect wing theory. Although discredited in 1938 by more refined studies, Needham’s work was the basis for the Comstock–Needham System of naming insect wing veins, considered “an important step in showing the homology of all insect wings.” Needham later replaced Comstock as head of the Department of Entomology at Cornell, a position he held for more than 20 years.
A new study by Luke Myers (a Saranac native) and Timothy Mihuc of the Lake Champlain Research Institute at SUNY Plattsburgh, along with Boris Kondratieff of Colorado State University, highlights the role of Needham and Betten in the rise to prominence of of aquatic insect entomology in New York State in the early 20th century and treads new ground as an important update to our knowledge of aquatic insects in the Adirondack region.
After four years of studying mayflies, caddisflies and stoneflies, Myers (who did much of the fieldwork with the assistance of self-taught caddisfly expert D.E. Ruiter), Mihuc, and Kondratieff have produced what is being considered the most comprehensive biodiversity study of those aquatic insects in the Adirondacks.
According to a story by Mike Lynch in the Adirondack Daily Enterprise, “Myers and his team examined 25,000 specimens from 465 locations. They found 509 species of mayflies, caddisflies and stoneflies, including 99 that were reported in this state for the first time. They also discovered several species new to science and some species of conservation concern.”
Even given the new techniques and equipment available to modern researchers, that’s no mean feat. It’s also one that will be a welcome addition to those interested in the biodiversity of Adirondack wetlands and their place in the larger ecology of the region.
Photos: Above, Little Clear creek, Adirondack Fish Hatchery (1900 NYS Museum Photo); Middle, illustration from the 1901 report “Aquatic Insects – Sepedon and Tetanecera”; Below, Luke Myers working on the Raquette River near Axton Landing (Photo Provided).