HOME >> BIOLOGY >> NEWS
Sea level rise threatens marshes in Chesapeake and Delaware Bays

WASHINGTON - Chesapeake and Delaware Bays, the two largest estuaries on the east coast of the United States, are losing marshland to rising sea levels caused by greenhouse warming. Research by University of Maryland scientists suggests that virtually all coastal marshes along these bays could disappear before 2100, if the sea level continues to rise at present rates or higher rates predicted by climate models.

Loss of these marshes would be devastating, the researchers say, due to its effect on the food chain, water quality, and the amount of carbon that would be released into the oceans and atmosphere. Marshes act as carbon sinks, holding it in solid form, so it does not emerge as carbon dioxide gas. The study, by Prof. Michael S. Kearney and colleagues, is reported in the April 16 issue of Eos, a publication of the American Geophysical Union.

Kearney describes a new technique he and his colleagues developed, based on 1993 images from the Thematic Mapper instrument on the Landsat satellite, updated with more recent aerial photography and field surveys. The model measures reflectance from the marsh's soil or sediment layer, its vegetation, and the water, in order to determine its Marsh Surface Condition Index (MSCI), which tracks the overall health of the marsh. A key benefit of the MSCI is that it helps scientists focus on the role of long term sea level rise, without regard to annual variations caused by heavy storms and other transitory phenomena.

In Chesapeake Bay, the greatest degradation of marshes has occurred in the middle portion of its eastern shore at Blackwater Wildlife Refuge. The upper reaches of both Chesapeake and Delaware Bays are less degraded than the middle and lower reaches. This, the researchers say, is due to the smaller amount of river sediment, which helps the upward growth of the marsh, reaching the lower parts of the bays.

In addition, impoundments, which limit stream flows into Delaware Bay from New Jerse
'"/>

Contact: Harvey Leifert
hleifert@agu.org
202-777-7507
American Geophysical Union
11-Apr-2002


Page: 1 2

Related biology news :

1. Blue marlin in gulf have high mercury levels, A&M study shows
2. Flame retardant levels much higher in farmed salmon
3. Excess levels of nitrogen, phosphorus linked to deformed frogs
4. Study: Mothers turn fearless when peptide level drops
5. Briggs takes to the molecular level Darwins findings on plants sensing the direction of light
6. Maternal DHA levels plays important role in infant development
7. Carnegie Mellon neuroscientist develops tool to image brain function at the cellular level
8. Film found on windows after 9/11 reveals higher level of pollutants
9. Published research contains high level of statistical errors
10. Moderate alcohol consumption increases plasma levels of a protective hormone
11. Sediments in many Central Valley streams contain toxic levels of pyrethroid pesticides

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Sea level rise threatens marshes Chesapeake and Delaware Bays

(Date:3/20/2015)... , Mar. 20, 2015 Research and Markets ... addition of the "India Sensors Market Forecast ... The sensor market is projected to ... Consumer electronics, automotive, industrial and healthcare ... in the country. In addition, adoption of MEMS ...
(Date:3/20/2015)... 20, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market, announces its ... of the products featured in 2015 "I Want That" ... PM EST on the DIY Network.   ... Vegas , site of the 2015 International CES ...
(Date:3/19/2015)... , March 19, 2015  NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market, announces its ... a news clip that aired this week on ... . In a segment "The Next Great Thing", ... ,a new way to pay, and ,a really big breakthrough ...
Breaking Biology News(10 mins):India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 2NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 3NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 2NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 3
(Date:3/30/2015)... March 29, 2015 A two-day workshop ... States and plenary talks by four leading photonics researchers ... + Optoelectronics next month in Prague, Czech Republic. ... 17 conferences alongside a two-day exhibition. Sponsored by ... the event will run 13-16 April in the Clarion ...
(Date:3/30/2015)... , March 30, 2015  Naldemedine, an ... development by Shionogi & Co., Ltd., met its ... study (COMPOSE I) for the treatment of opioid-induced ... pain receiving opioid therapy. Study results showed that ... significantly improved the frequency of spontaneous bowel movement ...
(Date:3/30/2015)... and MADISON, Wis. , March ... Nakajima ,) (TSE: 4901) ("Fujifilm") and Cellular Dynamics International, ... ICEL ) ("CDI"), a leading developer and manufacturer of ... specifications, today announced that the two companies have entered ... via an all-cash tender offer to be followed by ...
(Date:3/29/2015)... 2015  Caris Life Sciences® today announced ... cell cervical cancer (SCCC) that shows multiplatform ... company,s panomic, comprehensive tumor profiling service, identified high ... explain sensitivities and resistance to common drug ... biomarkers may guide treatment strategies in rare, ...
Breaking Biology Technology:Laser Energy Advances Among Reports Set for SPIE Optics + Optoelectronics 2Laser Energy Advances Among Reports Set for SPIE Optics + Optoelectronics 3Shionogi & Co., Ltd. Announces That Naldemedine Meets Primary Endpoint In A Phase 3 Study For The Treatment Of Opioid-Induced Constipation 2Shionogi & Co., Ltd. Announces That Naldemedine Meets Primary Endpoint In A Phase 3 Study For The Treatment Of Opioid-Induced Constipation 3Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 2Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 3Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 4Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 5Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 6Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 7Fujifilm Holdings to Acquire Cellular Dynamics International, Inc. 8Study Using Caris Molecular Intelligence Multiplatform Tumor Profiling Identifies Potential Treatment Strategies for Small Cell Cervical Cancer 2Study Using Caris Molecular Intelligence Multiplatform Tumor Profiling Identifies Potential Treatment Strategies for Small Cell Cervical Cancer 3
Cached News: