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:7/22/2014)... disease causing agents, some viruses can perform crucial ... the world we live in today, according to ... Microbiology. , "Viruses participate in essential Earth processes ... from contributing to biogeochemical cycles, shaping the atmospheric ... Roossinck of Pennsylvania State University, a member of ...
(Date:7/22/2014)... some point, most kids will hear that drinking milk helps make ... But do these messages foster the idea that if something is ... new study in the Journal of Consumer Research , when ... to eat it. , "We predicted that when food is presented ... achieve a goal such as learning how to read or count, ...
(Date:7/22/2014)... Buccola, MSN, APRN, PMHCNS-BC, CNE, Assistant Professor of ... Orleans School of Nursing, contributed samples used in ... associated with schizophrenia and also suggesting a possible ... study, Biological insights from 108 schizophrenia-associated genetic loci, ... Nature , available at http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13595.html., ...
Breaking Biology News(10 mins):Report on viruses looks beyond disease 2LSUHSC contributes to work identifying new DNA regions associated with schizophrenia 2
(Date:7/22/2014)... Even within a phylum so full of mean little ... arthropods for its cruelty -- at least to crickets. Native ... is a most predatory sort of parasite. It swoops onto ... of larvae, and leaves its wicked brood to invade, kill ... of this would be possible without the fly,s ability to ...
(Date:7/22/2014)... rod-shaped metal nanoparticles in water with ultrasound and they,ll ... Why? No one yet knows exactly. But researchers at ... clocked their speedand it,s fast. At up to 150,000 ... than any nanoscale object submerged in liquid ever reported. ... up the possibility that they could be used not ...
(Date:7/22/2014)... , July 22, 2014   BioTE ... therapy using natural, bio-identical hormone pellets, today announced ... MD to the company.   Dr. Rouzier is joining ... physician.      Dr. Rouzier was residency ... UCLA and is a board certified emergency physician ...
(Date:7/22/2014)... July 22, 2014 CTD Holdings, Inc. ... pharmaceutical, medical device, cosmetics, and other markets, announced today ... a group of qualified private investors led by Novit ... , The transaction involved the signing of a ... shares of Common Stock at a price per share ...
Breaking Biology Technology:Fly-inspired sound detector 2Fly-inspired sound detector 3Fly-inspired sound detector 4NIST shows ultrasonically propelled nanorods spin dizzyingly fast 2Dr. Neal Rouzier Joins BioTE Medical 2Dr. Neal Rouzier Joins BioTE Medical 3CTD Holdings Closes $1.725 Million Private Placement 2CTD Holdings Closes $1.725 Million Private Placement 3
Cached News: