Navigation Links
A river flipped: Humans trump nature on Texas river
Date:8/16/2010

HOUSTON -- (Aug. 16, 2010) -- A new study by geochemists at Rice University finds that damming and other human activity has completely obscured the natural carbon dioxide cycle in Texas' longest river, the Brazos.

"The natural factors that influence carbon dioxide cycling in the Brazos are fairly obvious, and we expected the radiocarbon signature of the river to reflect those influences," said study co-author Caroline Masiello, assistant professor of Earth science at Rice. "But it looks like whatever the natural process was in the Brazos, in terms of sources and sinks of carbon dioxide, it has been completely overprinted by human activities."

The study, which is available online in the journal Biogeochemistry, is the first to document such an overwhelming influence of human activity on carbon dioxide in a major river.

With humans adding some 8.5 gigatons of carbon dixoide to the atmosphere each year through the burning of fossil fuels, scientists are increasingly interested in studying how the atmosphere and biosphere exchange carbon dioxide. Plants take up carbon dioxide from the air via photosynthesis and store it in their leaves and stems. Some of that stored carbon gets buried in the soil and locked away for hundreds or thousands of years. But much is also washed into rivers, where rapid decomposition can quickly return it to the atmosphere. Understanding when and where that plant carbon dioxide is returned to the atmosphere is essential if policymakers are to plan effective carbon-sequestration strategies.

One method scientists use to gauge how effectively ecosystems store carbon is radiocarbon dating. The technique involves precisely measuring the amount of radioactive carbon-14 in samples from an ecosystem. Because about half of the carbon-14 atoms in a material will decay and become nitrogen-14 every 5,730 years, scientists can determine the age of a material based on how much carbon-14 it still contains.


'/>"/>
Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. UC Riverside receives 6 grants for tobacco-related research
2. UC Riverside researchers measure diesel emissions on the freeway
3. UC Riverside faculty member joins elite group of entomologists
4. Rapid growth in adolescence leads to fewer offspring, UC Riverside biologists find
5. UC Riverside entomologist to oversee centralized database of bee specimens
6. UC Riverside entomologist helps manage invasion threats posed to Californias avocados
7. UC Riverside botanist receives Botanical Society of Americas highest honor
8. Co-discoverer of 4.4-million-year-old Ardi to give talk at UC Riverside on human evolution
9. U of Minn. study finds rising levels of dioxins from common soap ingredient in Mississippi River
10. UC Riverside plant cell biologist receives top scientific honor
11. Public lecture at UC Riverside to highlight Californias environment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2015)... 27, 2015   Codonics (codonics.com), ... and image documentation solutions and Omnicell ... automation solutions, is pleased to announce their ... Safe Label System® (SLS), an award-winning FDA ... the Omnicell Anesthesia Workstation, helps prevent medication ...
(Date:5/22/2015)... -- According to a new market research ... Emotion, Forensic), by Software (Middleware, Databases), by Hardware (Cameras, Integrated ... Home) - Global Forecast to 2020", published by MarketsandMarkets, ... 2015 to $6.19 Billion by 2020, at a CAGR ... Tables and   43 Figures spread through 140 Pages ...
(Date:5/20/2015)... , May 20, 2015 NXT-ID, Inc. ... that its wholly owned subsidiary, 3D-ID LLC, a company ... Team Battelle for the biometrics technology portion of the ... Contract from the Department of the Army. ... products developed for government, law enforcement and security agencies. ...
Breaking Biology News(10 mins):Codonics and Omnicell Expand Partnership 2Codonics and Omnicell Expand Partnership 3Codonics and Omnicell Expand Partnership 4Facial Recognition Market Worth $6.19 Billion by 2020 2Facial Recognition Market Worth $6.19 Billion by 2020 3NXT-ID, Inc Announces Participation as Member of Team Battelle for TIES Contract Award 2NXT-ID, Inc Announces Participation as Member of Team Battelle for TIES Contract Award 3
... 2009 - Collaboration in prostate cancer translational research in ... achieved in recent years but also to streamline current ... overlaps. This was amongst the goals of the two-day ... opened today in Amsterdam, The Netherlands. "It ...
... Outstanding International Horticulturist Award from the American Society for ... recognition of her longstanding and valuable contribution to international ... award on 25 July 2009 at the annual ASHS ... co-editor of the books Genetics and Genomics of Rosaceae ...
... -- Predation is one of the most fundamental and fascinating ... predators on Earth. However, their hunting pattern is difficult to ... a result, shark predatory behavior has remained much of a ... using geographic profiling -- a criminal investigation tool used to ...
Cached Biology News:Prostate Cancer Translational Research in Europe meeting: Search for biomarkers continues 2Prostate Cancer Translational Research in Europe meeting: Search for biomarkers continues 3Geographic profiling applied to track hunting patterns of white sharks in South Africa 2
(Date:6/2/2015)... , June 02, 2015 Research ... of Jain PharmaBiotech,s new report "Biomarkers - ... This report follows the broad definition ... be objectively measured and evaluated as an indicator ... as pharmacological responses to a therapeutic intervention. Tests ...
(Date:6/2/2015)... Research and Markets( http://www.researchandmarkets.com/research/l5jcdk/genotyping_market ) has announced ... Application & by Products - Global Forecast to 2020" ... genotyping market is expected to reach $17.0 Billion in ... of 22.3% during the forecast period of 2015 to ... the availability of a range of products for wide ...
(Date:6/2/2015)... --  Hospira, Inc. (NYSE: HSP ), a ... – a global biopharmaceutical company – has received approval ... Brazil – for Remsima (infliximab), ... Brazil . The medication will be ... infliximab in 26 European countries and in ...
(Date:6/2/2015)... “Stem Cell Therapy to help dogs suffering from ... used often as an adjunct to surgery in large specialty ... aware or comfortable enough with the techniques to offer it ... for the last resort cases - when nothing else works ... paw to get around. It is an easy procedure, and ...
Breaking Biology Technology:Global Biomarkers Market Report 2015 - Technologies, Markets and Companies Analysis and Forecasts 2014-2024 2Global Biomarkers Market Report 2015 - Technologies, Markets and Companies Analysis and Forecasts 2014-2024 3Genotyping Market Report 2015 by Technology, Application & by Products - Global Forecast to 2020 for the $17 Billion Market 2ANVISA Approves First Infliximab Biosimilar in Brazil 2ANVISA Approves First Infliximab Biosimilar in Brazil 3ANVISA Approves First Infliximab Biosimilar in Brazil 4ANVISA Approves First Infliximab Biosimilar in Brazil 5VetStem Biopharma, Proudly Announces a New Long Term Partnership with VCA West Los Angeles in Support of Stem Cell Therapy Training and Clinical Opportunities. 2VetStem Biopharma, Proudly Announces a New Long Term Partnership with VCA West Los Angeles in Support of Stem Cell Therapy Training and Clinical Opportunities. 3
... ChemoCentryx, Inc. today announced positive preclinical results for its ... the American Society of Nephrology. CCR2 inhibition in diabetic ... serum markers of renal function, and hyperglycemia.  These data ... Inhibition in Diabetic Mice Results in a Rapid and ...
... Nov. 10, 2011 Sequenom, Inc. (NASDAQ: SQNM ... today announced the Company,s participation at the Lazard Capital Markets ... York City November 15-16, 2011. Harry F. Hixson, ... Director and EVP of Research and Development, will present on ...
... The report " Lung Cancer Drugs ... http://www.marketsandmarkets.com/Market-Reports/lung-cancer-drugs-market-508.html ] " analyzes and studies the major ... Browse in-depth TOC on   ... 2020). Get Free 10% ...
Cached Biology Technology:ChemoCentryx Presents Positive Results for Novel CCR2 Inhibitor in Preclinical Models of Diabetic Nephropathy at the 44th Annual Meeting of the American Society of Nephrology 2ChemoCentryx Presents Positive Results for Novel CCR2 Inhibitor in Preclinical Models of Diabetic Nephropathy at the 44th Annual Meeting of the American Society of Nephrology 3Sequenom Announces Participation at the Lazard Capital Markets 8th Annual Healthcare Conference 2MarketsandMarkets: Lung Cancer Drugs Market in G7 Countries Worth $13 Billion by 2020 2MarketsandMarkets: Lung Cancer Drugs Market in G7 Countries Worth $13 Billion by 2020 3MarketsandMarkets: Lung Cancer Drugs Market in G7 Countries Worth $13 Billion by 2020 4
Mouse monoclonal antibody to ST8SIA2 - ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 2...
Mouse monoclonal antibody raised against a partial recombinant COG2. NCBI Entrez Gene ID = COG2...
Mouse monoclonal antibody raised against a partial recombinant RAB11B. NCBI Entrez Gene ID = RAB11B...
...
Biology Products: