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:10/29/2014)... is open for the Society of Interventional ... 2015 is the one place where interventional ... health care professionals can come together to ... technologies being presented, discussed and tested. ... invasive, image-guided medicine, SIR 2015 will feature ...
(Date:10/29/2014)... chemicals from household and industrial products are in the ... for most of them, scientists have yet to determine ... first step toward doing that by estimating which substances ... is published in the ACS journal Environmental Science ... note that the risks to human health of any ...
(Date:10/29/2014)... LANSING, Mich. – As bodies decompose, their types ... the clues they provide could mean the difference ... , Michigan State University is using a more ... help Detroit death-scene investigators examine these changing populations. ... as geographical location of death, gender, race, socioeconomic ...
Breaking Biology News(10 mins):SIR 2015: Interventional radiology shapes tomorrow's medicine 2MSU partners with Detroit to investigate death scenes 2
(Date:10/30/2014)... 30, 2014 A new report, commissioned by ... takes an in-depth look at Indiana,s ... resulted over two different time frames: 1993 to 2002 ... of future opportunities for investment growth.  The Life ... report shows gains in innovation dollars as well as ...
(Date:10/30/2014)... 2014) – The severe flooding that devastated a wide ... destructive if the bridges, roads and other infrastructure had ... from the University of Colorado Denver. , "People need ... Jimmy Kim, PhD, associate professor of structural engineering at ... and lead author the study. "There is an assumption ...
(Date:10/27/2014)... -- The Italian company Roadrunnerfoot has ... its artificial "lower limb", after the German giant ...      (Photo: http://photos.prnewswire.com/prnh/20141027/713097 ) , ... judgement has arrived: Roadrunnerfoot, the small Italian company ... prostheses with composite materials, has won against global ...
(Date:10/27/2014)... 2014 The “Molecular Diagnostic Market ... Technology (PCR, INAAT, DNA Sequencing), End User (Hospital, ... - Global Forecast to 2018” provides a detailed ... current market trends, and strategies impacting the global ... forecasts of the revenue and share analysis. , ...
Breaking Biology Technology:New report shows Indiana's gains in life sciences innovation capital outpace the nation 2New report shows Indiana's gains in life sciences innovation capital outpace the nation 3New report shows Indiana's gains in life sciences innovation capital outpace the nation 4New report shows Indiana's gains in life sciences innovation capital outpace the nation 5CU Denver study says upgrading infrastructure could reduce flood damage 2Italian Lower Limb Prosthesis Company Wins Lawsuit Against German Giant Ottobock 2Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 2Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 3Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 4Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 5
Cached News: