Navigation Links
Dead clams tell many tales
Date:10/29/2007

Inventories of living and dead organisms could serve as a relatively fast, simple and inexpensive preliminary means of assessing human impact on ecosystems. The University of Chicago's Susan Kidwell explains how measuring the degree of live-dead mismatch could be used as an ecological tool in the Oct. 26 early online edition of the Proceedings of the National Academy of Sciences.

"We affect ecosystems in many different ways, but the effects of our actions are hard to pin down because we rarely have scientific data from before the onset of those impacts," said Kidwell, the William Rainey Harper Professor in Geophysical Sciences at Chicago.

Detailed ecological data, when they exist at all, often go back no more than 50 years. But scientists would prefer a deeper historical perspective that covers centuries or even a millennium. Live-dead studies can provide some of the needed perspective, according to Kidwell. In these studies, scientists collect data on the living organisms and the skeletal remains found in a specific ecosystem, then evaluate how closely they match.

"Death assemblages are what we call time-averaged. They're like time exposures," Kidwell said, "because skeletal remains can hang around for a long time. In fact, through radiocarbon and other dating methods we know that shells can persist within the upper few inches of the sea floor for decades and even millennia in some circumstances."

Scientists have conducted many such studies over the last several decades. Their initial motivation had nothing to do with documenting the ecological impact of humans. The goal instead was to determine to what extent natural processes altered the record that living organisms had left behind for potential fossilization.

Kidwell's research focuses on coastal and open-marine settings, where disruptions range from dredging and bottom-fishing to the chemical byproducts of urbanization and agriculture that flow
'/>"/>

Contact: Steve Koppes
skoppes@uchicago.edu
773-702-8366
University of Chicago  
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Mutation in clams protects against paralytic shellfish poisoning but raises human health risk
2. RNA found in the cellular centrosome of surf clams
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Dead clams tell many tales
(Date:7/9/2015)... Research and Markets( ... "Biometrics for Banking; Market & Technology Analysis, ... their offering. The adoption for banking ... and the forecast is that by 2020 it ... involved in delivering biometric systems to the banking ...
(Date:7/8/2015)... YORK , July 8, 2015 Summary ... globally, and the fourth most fatal, with a mortality ... The poor prognosis of pancreatic cancer patients has highlighted ... treatment, which is not being met by the current ... an array of products with varying molecule types and ...
(Date:7/8/2015)... Florida , July 8, 2015 ... evolving as this summer,s must have products such as wearables, ... demand as popularity for biometrics based devices continues to rapidly ... NXT-ID, Inc. (NASDAQ: NXTD ), Google Inc. (NASDAQ: ... (NYSE: FIT ), GoPro, Inc. (NASDAQ: GPRO ) ...
Breaking Biology News(10 mins):Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3Frontier Pharma: Pancreatic Cancer - Identifying and Commercializing First-in-Class Innovation 2Frontier Pharma: Pancreatic Cancer - Identifying and Commercializing First-in-Class Innovation 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 2Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 4Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 5Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 6
... release is available in German . ... establishment of twelve new Collaborative Research Centres (CRC) beginning 1 ... at its spring meeting in Bonn. The new CRCs will ... 112 million euros (including a 20% programme allowance for indirect ...
... HOUSTON -- (May 28, 2010) -- A team ... critical effects at the heart of the latest high-temperature ... it. In new research appearing online today in ... University-led team offers new evidence about the quantum features ...
... 27, 2010 Ardipithecus ramidus a purported ... the Year" is coming under fire from scientists who ... there were dense woodlands at the African site where the ... abundant evidence for open savanna habitats," says University of Utah ...
Cached Biology News:DFG approves 12 new collaborative research centers 2DFG approves 12 new collaborative research centers 3DFG approves 12 new collaborative research centers 4DFG approves 12 new collaborative research centers 5DFG approves 12 new collaborative research centers 6Zeroing in on quantum effects 2Zeroing in on quantum effects 3Out of the woods for 'Ardi' 2Out of the woods for 'Ardi' 3Out of the woods for 'Ardi' 4
(Date:7/29/2015)... Research and Markets ... the "Global Biosimilars Market, 2015 - 2025" ... Global Biosimilars Market, 2015 - 2025, report provides ... market. With the blockbuster biologics losing patent protection ... are being viewed as viable substitutes to the ...
(Date:7/29/2015)... Inc., an early stage biotech startup based on perinatal ... the Musculoskeletal Transplant Foundation of Edison NJ ... round of development of the proprietary AmnioCept™ product line ... AmnioChor,s technology allows cryopreservation of the amniotic membrane of ... those tissues. Amnion is a well-established source of multipotent ...
(Date:7/29/2015)... 2015  Pfenex Inc. (NYSE MKT: PFNX) announced today ... released on Thursday, August 13, 2015, before the open ... will host a conference call to discuss the financial ... outlining the financial results and business update will be ... call 1-866-376-8058 (US) or 1-412-542-4131 (international) and reference Pfenex ...
(Date:7/29/2015)... ... July 29, 2015 , ... The third Medical Innovation Impact Index (MI3) Alert ... particular, drug/device combinations. The current system received a score of 0 (range -10 to ... Innovation (iPCI) of Fairleigh Dickinson University’s ( FDU ) Rothman Institute of Innovation ...
Breaking Biology Technology:Global Biosimilars Market to 2025: Monoclonal Antibodies (mAbs), Insulin, Interferons, G-CSF/ GM-CSF, Erythropoietins and Others 2Global Biosimilars Market to 2025: Monoclonal Antibodies (mAbs), Insulin, Interferons, G-CSF/ GM-CSF, Erythropoietins and Others 3The Musculoskeletal Transplant Foundation Agrees to Invest in AmnioChor 2Pfenex To Report Second Quarter 2015 Results and Provide Business Update on Thursday, August 13, 2015 2Third Medical Innovation Impact Index Issued by Fairleigh Dickinson University’s Initiative for Patient-Centered Innovation (iPCI) 2Third Medical Innovation Impact Index Issued by Fairleigh Dickinson University’s Initiative for Patient-Centered Innovation (iPCI) 3
... turn a profit, and it operates in a biotech space where ... research tool manufacturer NimbleGen Systems to file an initial ... bit of evidence that the Wisconsin biotech company is going places. ... and visibility for NimbleGen, which saw its revenues grow to $13.5 ...
... second time this year, a tech-based company in Wisconsin has ... public. Called an initial public offering, this kind of business ... who are directly involved, but to others who may follow ... company, has filed papers with the Securities and Exchange ...
... Wis . - Every surgical operation requires proper wound ... and a Madison start-up business has received a $100,000 ... , , Nerites Corp ., which develops tissue repair ... received a $100,000 Small Business Innovation Research ...
Cached Biology Technology:IPO-bound NimbleGen traveling in fast company 2IPO-bound NimbleGen traveling in fast company 3IPO-bound NimbleGen traveling in fast company 4Wisconsin IPOs are a harbinger of growing tech economy 2Wisconsin IPOs are a harbinger of growing tech economy 3