HOME >> BIOLOGY >> NEWS
Shrinking ponds signal warmer, dryer Alaska

FAIRBANKS, Alaska--A first-of-its kind analysis of fifty years of remotely sensed imagery from the 1950s to 2002 shows a dramatic reduction in the size and number of more than 10,000 ponds in Alaska. The analysis, by University of Alaska Fairbanks scientists and published this week in the Journal of Geophysical Research, indicates that these landscape-level changes in arctic ponds are associated with recent climate warming in Alaska and may have profound effects on climate and wildlife.

Over the past 50 years, Alaska has experienced a warming climate with longer growing seasons, increased permafrost thawing, an increase in water loss due to evaporation from open water and transpiration from vegetation, and yet no substantial change in precipitation.

The shrinking of these closed-basin ponds may be indicative of widespread lowering of the water table throughout low-lying landscapes in Interior Alaska, write the authors. A lowered water table negatively affects the ability of wetlands to regulate climate because it enhances the release of carbon dioxide by exposing soil carbon to aerobic decomposition.

"Alaska is important in terms of waterfowl production and if you have a lowering of the water table that could have a potentially huge impact on waterfowl production," said Dave Verbyla, co-author and professor in the School of Natural Resources and Agricultural Sciences at UAF.

"This is an issue relevant to flyway management in terms of all the waterfowl that might use the Yukon Flats National Wildlife Refuge and overwinter elsewhere, and this is something that goes beyond the refuges in Alaska," said A. David McGuire, co-author and professor of ecology at the Institute of Arctic Biology at UAF.

National Wildlife Refuges cover more than 77 million acres in Alaska and make up 81% of the national refuge system. These refuges provide breeding habitat for millions of waterfowl and shorebirds that overwinter in more souther
'"/>

Contact: Marie Gilbert
marie.gilbert@uaf.edu
907-474-7412
University of Alaska Fairbanks
12-Oct-2006


Page: 1 2

Related biology news :

1. 1,000-year-old Arctic ponds disappearing due to global warming
2. Global warming is evaporating Arctic ponds, new study shows
3. Same species responds differently to same warming, depending on location
4. Ovarian cancer responds to aspirin derivative with chemo
5. UCLA researchers observe how the immune system recognizes and responds to cancer
6. Fish in ponds benefit flowering plants
7. Heart responds to fasting by remodeling vital energy-producing components
8. Increase in creeping vines signals major shift in southern US forests
9. Insulin sensitizer also serves as energy-conserving signal to the brain
10. Endosome-mediated signaling in plants
11. University of Colorado invention may allow thirsty crops to signal farmers

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/24/2017)... 24, 2017 Research and Markets has announced ... Analysis & Trends - Industry Forecast to 2025" report to ... The ... a CAGR of around 15.1% over the next decade to reach ... analyzes the market estimates and forecasts for all the given segments ...
(Date:3/22/2017)... , March 21, 2017 ... Cloud used by retailers such as 1-800-Flowers and ... platform — Product Recommendations and Replenishment. Using Optimove,s machine ... more personalized product and replenishment recommendations to their ... also on predictions of customer intent drawn from ...
(Date:3/16/2017)... - Against identity fraud with DERMALOG solutions "Made in Germany "  ... ... multi-biometric solutions provide a crucial contribution against identity fraud. (PRNewsFoto/Dermalog Identification Systems) ... Used combined in one project, multi-biometric solutions provide a crucial contribution against identity ... ...
Breaking Biology News(10 mins):
(Date:4/27/2017)... ... April 27, 2017 , ... ... today announced their digital pathology technology has the potential to eliminate subjectivity in ... centers in The Netherlands as part of the 2017 ISBI CAMELYON Digital ...
(Date:4/27/2017)... ... April 27, 2017 , ... During the course of ... testing for 1,25-Dihydroxyvitamin D can enhance clinical practice. Participants will learn the medical ... D. , Dr. Gregory Plotnikoff, senior consultant with Minnesota Personalized Medicine, will be ...
(Date:4/27/2017)... (PRWEB) , ... April 27, 2017 , ... ... the 2017 Borlaug CAST Communication Award goes to Jayson Lusk, a consummate communicator ... forms of media to advocate for science, as he explains how innovation and ...
(Date:4/26/2017)... ... 26, 2017 , ... WonderWorks, Myrtle Beach’s science focused amusement ... of deep space exploration and inspire space enthusiasts. The exhibit features interactive exhibits ... guest appearance by former Shuttle Astronaut Don Thomas. , The intergalactic weekend kicks ...
Breaking Biology Technology:
Cached News: