Navigation Links
Research: Snails were overlooked contributors to marsh destruction

s of influences resulted in overlooking "top down" ones ?in this case, top-down controls potentially spurred by climate change.

"For ecology in general, the take-home lesson here is that increasing climatic extremes, such as drought stress, can trigger formation of grazer fronts and subsequent waves of habitat die-off in an otherwise stable ecosystem," Silliman said. "For marsh ecology, the message is even clearer: The long-standing paradigm that bottom-up forces rule is officially dead."

Climate change aside, the study also falls in line with other recent studies highlighting the role of predators or other top-down animals. "This study adds to a growing body of evidence showing strong top-down regulation of ecosystems processes, including sharks in the Gulf of Mexico and wolves in Yellowstone Park," Silliman said.

Native and abundant, dime- to quarter-sized periwinkle snails can often be seen hanging on cordgrass above the water line. Contrary to appearances, they don't actually eat the grass, or at least not much of it. Instead, they crunch up the surface to make it easier for colonization by fungi. In a process described as fungal farming, the snails then eat the fungi.

Periwinkle snails normally coexist happily with marsh grasses. But the drought so weakened cordgrass that it began dying off. Snails then moved in, finishing off weakened and dying patches. When these disappeared and exposed mudflats emerged, large numbers of snails moved off the flats and concentrated on the edge of the die off, where healthy grass remained. This migration resulted in the formation of grazer "fronts," which attacked and destroyed more marsh in "waves" of runaway consumption, the authors write.

A team of scientists from UF, the Netherlands Institute of Ecology, Louisiana State University and Brown University reached that conclusion after observations and experiments at 12 randomly selected die-off sites in Louisiana, Georgia and South Caro
'"/>

Source:University of Florida


Page: 1 2 3

Related biology news :

1. Twenty Years of Malaria Research: Outcomes and Perspectives
2. Man-made wetlands effectiveness similar to natural marsh
3. Iraqs marshes show progress toward recovery
4. How healthy is that marsh? Biologists count parasites
5. Species unique to tidal marshes face threats
6. The vicious cycle of rainforest destruction
7. Protein found to shield pancreatic cancer cells from self-destruction
Post Your Comments:
(Date:4/20/2014)... breast and pancreatic cancers also promote drug-resistance and ultimately ... San Diego School of Medicine have discovered a molecule, ... tumors that appears responsible for inducing tumor metastasis by ... , The findings, published in the April 20, 2014 ... point to new therapeutic opportunities for reversing drug resistance ...
(Date:4/20/2014)... -- Using corn crop residue to make ethanol and ... greenhouse gases than gasoline, according to a study published ... , The findings by a University of Nebraska-Lincoln team ... be used to meet federal mandates to ramp up ... stover -- the stalks, leaves and cobs in cornfields ...
(Date:4/18/2014)... population predicted to reach 9 billion by 2050 ... considers human-altered landscapes such as farmland, according to ... that supports it might be an increasingly scarce ... of the land surface is directly affected by ... impacts such as climate change. But what if ...
Breaking Biology News(10 mins):Cancer stem cells linked to drug resistance 2Study casts doubt on climate benefit of biofuels from corn residue 2Study casts doubt on climate benefit of biofuels from corn residue 3Stanford researchers rethink 'natural' habitat for wildlife 2Stanford researchers rethink 'natural' habitat for wildlife 3Stanford researchers rethink 'natural' habitat for wildlife 4
... of biodiversity, but there has been no effective way ... areas. As a result, we have limited understanding of ... are affecting these delicate ecosystems. A major advance in ... Asner of the Carnegie Institution,s Department of Global Ecology ...
... 2008) With the sequencing of the human genome ... a genes and other DNA sequences can vary widely between ... our species, genetic diversity but it has also been linked ... Harbor Protocols ( www.cshprotocols.org/TOCs/toc6_08.dtl ) features a new method ...
... the human malaria parasite, Plasmodium falciparum, which is responsible ... from becoming sexually mature. The discovery ... resistance, which is a major public health problem and ... cycle of Plasmodium falciparum is complex, and it is ...
Cached Biology News:Revolution in rain forest monitoring with MacArthur grant 2Cold Spring Harbor Protocols features methods for analyzing genomes and plant cells 2
(Date:1/14/2014)... (PRWEB) January 14, 2014 EquitiesIQ, a ... Inc. (OTCQB: ALQA). Alliqua is an emerging biomedical company ... the wound care market. , Free report download: ... with a seasoned management team and Board, which launched ...
(Date:1/14/2014)... 2014 In recent years, growing suspicion ... in product development and promotion has led to unprecedented ... fueled by concerns about the insidious impact of commercialization ... spectacular fines to the world’s biggest pharmas for illegal ...
(Date:1/14/2014)... UK (PRWEB) January 13, 2014 Bob ... with more than 20 years in the industry, has ... photonics . Hainsey will serve as the society’s Science ... Dr. Hainsey join SPIE as our Technology Strategist, further ...
(Date:1/14/2014)... BioMedomics, Inc. , a Point of Care ... novel disease specific POC tests, announced today that it has ... of $690,000. The investment is from private investors and is ... of private investors has significant successful experience in early investments ...
Breaking Biology Technology:EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2BioMedomics, Inc. Closes $690K Round of Financing 2
... The " Anesthesia Drugs Market (2011 ... studies the U.S. market for intravenous anesthesia drugs with special focus on ... import system for controlled substances in U.S. and U.S. market entry strategy. ...   " Anesthesia Drugs Market (2011 - ...
... was able to reach for and sip from a drink on ... by using her thoughts to direct a robotic arm. ... is evaluating the safety and feasibility of an investigational device called ... brain-computer interface (BCI) intended to put robotics and other assistive technology ...
...  Questcor Pharmaceuticals, Inc. (NASDAQ: QCOR ) announced ... Company,s common share repurchase program authorization by an additional ... 2008, the Company has returned $236 million to shareholders ... preferred shares, representing approximately 27% of its shares as ...
Cached Biology Technology:Anesthesia Drugs Market in U.S. worth $7 Billion by 2015: MarketsandMarkets 2Anesthesia Drugs Market in U.S. worth $7 Billion by 2015: MarketsandMarkets 3Paralyzed individuals use thought-controlled robotic arm to reach and grasp 2Paralyzed individuals use thought-controlled robotic arm to reach and grasp 3Paralyzed individuals use thought-controlled robotic arm to reach and grasp 4Paralyzed individuals use thought-controlled robotic arm to reach and grasp 5Questcor Pharmaceuticals Expands Repurchase Program 2Questcor Pharmaceuticals Expands Repurchase Program 3Questcor Pharmaceuticals Expands Repurchase Program 4Questcor Pharmaceuticals Expands Repurchase Program 5
... are designed to rapidly and reliably ... our patented APA Technology. APAgene provides ... extraordinarily competitive price. All necessary ingredients ... Locator Kit can be used for ...
... Linkage: This CLS number ... created to easily match Cornings ... availability yet, please order under ... or contact customer service for ...
... system automates the denaturation and hybridization steps ... convenience for clinical and research personnel. The ... of sample types, is easy to use, ... 50% while ensuring overall precision and accuracy ...
... Buffer is a convenient, premixed, ... samples and Perfect RNA Markers. ... no dilution and is suitable ... Simply mix equal volumes of ...
Biology Products: