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Study shows how varying climate conditions impact vulnerable species

Credit: University of Arkansas
New findings on the diet of Arctic foxes, determined by the condition of their teeth, show how varying climate conditions in the Arctic affect the animals that live there.
In a study published in
Polar Biology, Peter Ungar, Distinguished Professor of anthropology at the University of Arkansas, and several co-authors analyzed tooth breakage and wear - both gross and micro - of Arctic foxes from Russia s Yamal Peninsula.
Studying the effect of varying climate conditions within this region helps scientists understand the impact of climate change on vulnerable animals and could explain future responses and adaptation, given the warming trend and thawing in Arctic areas. The researchers study is the first to combine dental proxies for short-term, or seasonal, and long-term, or lifetime, diet to better understand how resource depletion affects species differently in different locations within the Arctic. ....

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FSU researchers discover how 'cryptic species' respond differently to coral bleaching

Certain brightly colored coral species dotting the seafloor may appear indistinguishable to many divers and snorkelers, but Florida State University. ....

French Polynesia General , French Polynesia , United States , Hong Kong , Scripps Institution Of Oceanography , Erika Johnston , Jackson Powell , Scott Burgess , Peter Edmunds , Florida State University , Marine Laboratory Scott Burgess , National Science Foundation , California State University Northridge , Department Of Biological Science , Marine Laboratory Christopher Peters , California State University , Hong Kong University Of Science , Associate Professor , Biological Science Scott Burgess , Biological Science , Hong Kong University , Scripps Institution , Christopher Peters , University Of Science And Technology , Coral Bleaching , Climate Change ,

Million-Year-Old Plant Fossils Are a Greenland Ice Sheet Warning

Photo: Felipe Dana (AP)
Jars of dirt taken from a Cold War-era military caper and lost in a freezer for decades could hold crucial new information about climate change and sea level rise. A study published on Monday in Proceedings of the National Academy of Scientists says that plant fossils found in a sample of dirt collected from a mile beneath the ice in the mid-1960s suggest that the world’s pre-human climate was at one point warm enough to completely melt the Greenland ice sheet.
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The dirt researchers inspected is a sediment sample from the bottom of an ice core, retrieved by drilling down into the ice sheet that covers the majority of Greenland. It’s pretty hard to actually reach all the way down to bedrock when taking samples due to the incredible pressure from the ice, explained Drew Christ, the study’s lead author and a postdoctoral fellow at the University of Vermont. There are only a few expeditions that have actually gotten sediment from ....

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Zealandia Switch may be the missing link in understanding ice age climates

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IMAGE: Moraines constructed during repeated advance-retreat cycles of one of the glaciers that extended out from the Southern Alps in New Zealand during the last ice age. Around 18,000 years ago,.
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Credit: Photo courtesy of Aaron Putnam
Orono, Maine The origins of ice age climate changes may lie in the Southern Hemisphere, where interactions among the westerly wind system, the Southern Ocean and the tropical Pacific can trigger rapid, global changes in atmospheric temperature, according to an international research team led by the University of Maine.
The mechanism, dubbed the Zealandia Switch, relates to the general position of the Southern Hemisphere westerly wind belt the strongest wind system on Earth and the continental platforms of the southwest Pacific Ocean, and their control on ocean currents. Shifts in the latitude of the westerly winds affects the strength of the subtropical oceanic gyres and, in turn, influences the ....

United States , New Zealand , University Of Maine , Southern Alps , New Zealand General , Joellen Russell , Wallace Broecker , David Barrell , Thomasr Brown , Pacific Ocean , Aaron Putnam , George Denton , Michael Kaplan , Quesada Family Foundation , Umaine Libra Professor Of Geological Sciences , Comer Family Foundation , Cosmogenic Nuclide Laboratory , National Science Foundation , Columbia University Lamont Doherty Earth Observatory , Columbia University , Columbia University Joerg Schaefer , University Of Arizona , Southern Hemisphere , Southern Ocean , Zealandia Switch , Lamont Doherty Earth Observatory ,

Oil in the ocean photooxides within hours to days, new study finds

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IMAGE: Satellite image taken on May 9, 2010 of the Deepwater Horizon oil spill site in the Gulf of Mexico.
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Credit: MODIS on NASA s AQUA satellite, 9 May 2010 @ 190848 UTC. Downlink and processed at the UM Rosenstiel School s Center for Southeastern Tropical Advanced Remote Sensing (CSTARS)
MIAMI A new study lead by scientists at the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science demonstrates that under realistic environmental conditions oil drifting in the ocean after the DWH oil spill photooxidized into persistent compounds within hours to days, instead over long periods of time as was thought during the 2010 Deepwater Horizon oil spill. This is the first model results to support the new paradigm of photooxidation that emerged from laboratory research. ....

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