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:2/2/2017)... 1, 2017  Central to its deep commitment ... worldwide, The Japan Prize Foundation today announced the ... pushed the envelope in their respective fields of ... scientists are being recognized with the 2017 Japan ... only contribute to the advancement of science and ...
(Date:1/30/2017)...   Invitae Corporation (NYSE: NVTA ... today announced that it will report its fourth quarter ... on Monday, February 13, 2017, and Invitae,s management team ... p.m. Eastern / 1:45 p.m. Pacific. ... financial results, guidance, and recent developments and will spend ...
(Date:1/25/2017)... YORK , Jan. 25, 2017 The ... Access Management (IAM) lifecycle is comprised of a ... for the purpose of maintaining digital identities and ... resources and applications. There are significant number of ... from time to time by optimizing processes and ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... ... February 23, 2017 , ... Brain Sentinel, Inc. has received ... SPEAC® System, the Brain Sentinel® Seizure Monitoring and Alerting System. The adjunctive seizure ... periods of rest. A lightweight, non-invasive monitor is placed on the belly of ...
(Date:2/23/2017)... ... , ... The Greater Gift Initiative, Inc , (GGI) a Winston-Salem, NC ... GGI's mission is to advance global health and highlight the greater good of clinical ... each clinical trial volunteer. The vision of GGI is to serve as a philanthropic ...
(Date:2/23/2017)... ... February 22, 2017 , ... ... , have been named Fellows of the Society this year, the Fellows Committee ... the multidisciplinary fields of optics, photonics, and imaging as well as their service ...
(Date:2/22/2017)...  PrimeVax Immuno-Oncology, Inc. announced today its CEO, ... Biocom Global Life Science Partnering Conference.  The presentation will ... the Torrey Pines Lodge, in San Diego.  ... who have chosen our company, amongst numerous others, to ... and clinical researchers," said Mr. Chen. "In contrast to ...
Breaking Biology Technology:
Cached News: