Navigation Links
Study shows parasites outweigh predators
Date:7/23/2008

(Santa Barbara, Calif.) - In a study of free-living and parasitic species in three estuaries on the Pacific coast of California and Baja California, a team of researchers from the University of California, Santa Barbara, the United States Geological Survey, and Princeton University has determined that parasite biomass in those habitats exceeds that of top predators, in some cases by a factor of 20. Their findings, which could have significant biomedical and ecological implications, appear in the July 24 issue of the science journal Nature.

According to Armand Kuris, a professor of zoology in UCSB's Department of Ecology, Evolution, and Marine Biology and a lead author of the paper, the study's findings have a potential impact on the perceived role of parasites in an ecosystem. From an ecological perspective, parasites serve both as regulators to prevent species from becoming numerically dominant and as indicators of the health of a particular ecosystem. The study shows for the first time that parasites might drive the flow of energy in ecosystems.

"The total amount of energy flow in ecosystems due to infectious processes must be enormous - even greater than we'd expect given the large parasite biomass," Kuris said. "I expect the amount of energy going into host tissue repair and replenishment is also huge. An implication of our study is that we should pay more attention to the energetics of disease."

Biomass is the amount of living matter that exists in a given habitat. It is expressed either as the weight of organisms per unit area or as the volume of organisms per unit volume of habitat. Until now, scientists have believed that because parasites are microscopic in size they comprise a small fraction of biomass in a habitat while free-living organisms such as fish, birds, and other predators comprise the vast majority.

The researchers quantified the biomass of free-living and parasitic species in the three estuaries a
'/>"/>

Contact: Andrea Estrada
andrea.estrada@ia.ucsb.edu
805-893-4620
University of California - Santa Barbara
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Rutgers biologist to study worms in Amazon, glaciers
2. Study suggests past climate changes may have promoted the formation of new species in the Amazon
3. Sugar study is sweetener for stem cell science
4. MSU researcher uses grant to study little-known but largely useful microbes
5. Scripps study sets high economic value on threatened Mexican mangroves
6. Study reveals air pollution is causing widespread and serious impacts to ecosystems
7. Gene panel predicts lung cancer survival, study finds
8. Study: Migrant laborers valuable to horticulture industry
9. Study shows increased education on nanotech, human enhancement increases public concerns
10. Study: Future snowmelt in West twice as early as expected; threatens ecosystems and water reserves
11. UCLA study identifies mechanism behind mind-body connection
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/15/2014)... Biologists at UC San Diego have succeeded in ... hormone responsible for growth and resistance to drought. ... studies to determine how the hormone helps plants ... by the continuing increase in the atmosphere,s carbon ... achievement appears in the April 15 issue of ...
(Date:4/15/2014)... have found a less invasive way to extract ... study how the mouth,s natural defenses ward off ... immune cells (white blood cells known as "leukocytes") ... mouthor reject foreign tissues, such as in failed ... and preventing such health issues as oral cancers, ...
(Date:4/15/2014)... (KNAW) has announced the names of five internationally renowned ... million US dollars prize money in total). The laureates ... science. , This year marks the 50th anniversary of ... Erwin Chargaff in 1964. , KNAW juries have ... , Christopher M. Dobson, John Humphrey Plummer ...
Breaking Biology News(10 mins):Biologists develop nanosensors to visualize movements and distribution of plant hormone 2New method isolates immune cells for researchers to study how they ward off oral diseases 2Five scientists awarded prestigious Heineken Prizes 2
... are the surprising culprits in delivering pollutants ?through their ... study shows. , The most common form of wildlife ... of the human-made contaminants to some coastal ecosystems, the ... pollutants such as mercury and DDT to as much ...
... discovered a novel way in which the brain size ... a signaling pathway that controls the orientation in which ... The way these cells are sliced during development is ... gives rise to two mature neurons that are incapable ...
... begun to clarify how one of the body's molecules controls ... and on to tissues to fight infection -- a crucial ... and causing autoimmune diseases. , The traffic control system -- ... on T cells -- usually prevents T cells from launching ...
Cached Biology News:Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows 2Brain size may depend upon how neural cells are cleaved 2Brain size may depend upon how neural cells are cleaved 3Discovery of T-cell 'traffic control' boosts new drug promise 2Discovery of T-cell 'traffic control' boosts new drug promise 3Discovery of T-cell 'traffic control' boosts new drug promise 4
(Date:1/15/2014)... 2014 The Microcompetition with Foreign DNA ... disease. One of these latent viruses is the Epstein ... rheumatoid arthritis (RA). Rheumatoid arthritis (RA) is a chronic ... by the theory, a study found that RA patients ... (1). , What is Microcompetition? , Dr. Hanan ...
(Date:1/15/2014)... Sunnyvale, CA (PRWEB) January 15, 2014 ... of high throughput research solutions, today announced that ... companies, has received delivery of Freeslate’s CM ... form screening. , Lupin, headquartered in Mumbai, ... quality, affordable generic and branded formulations and Active ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, ... p.m. , Location: Warrington Country Club, 1360 Almshouse Road, ... Foundation, the only national nonprofit organization solely dedicated to ... quality of life for those affected worldwide, will host ... Warrington Country Club in Warrington, Pa. , Each ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider ... major scientific, regulatory, business, and media events in ... , today announced its former associate Virginia Cox , ... office. Virginia Cox re-joins ... Commissioner for the Office of External Affairs at the U.S. ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2
... Calif., Jan. 5 Beckman Coulter, Inc. (NYSE: ... and marketer of products that simplify, automate, and ... Garrett, Beckman Coulter,s chairman, president and chief executive ... Morgan Healthcare Conference on Monday, January 12, 2009 ...
... - YM BioSciences Inc. (NYSE Alternext US:YMI, ... develops and commercializes differentiated products for patients ... clearance from Canadian regulatory authorities to initiate ... nimotuzumab, its EGFR-targeting antibody, in combination with ...
... and Development of Anti-Inflammatory Drugs Based on Collaborators, ... Jan. 5 Research published in Nature ... interactions between two small signaling proteins called chemokines ... development of atherosclerosis in mice. San Diego-based Carolus ...
Cached Biology Technology:YM BIOSCIENCES RECEIVES CLEARANCE TO INITIATE RANDOMIZED DOUBLE-BLIND CLINICAL TRIALS OF NIMOTUZUMAB IN LUNG CANCER AND BRAIN METASTASES FROM LUNG CANCER 2YM BIOSCIENCES RECEIVES CLEARANCE TO INITIATE RANDOMIZED DOUBLE-BLIND CLINICAL TRIALS OF NIMOTUZUMAB IN LUNG CANCER AND BRAIN METASTASES FROM LUNG CANCER 3YM BIOSCIENCES RECEIVES CLEARANCE TO INITIATE RANDOMIZED DOUBLE-BLIND CLINICAL TRIALS OF NIMOTUZUMAB IN LUNG CANCER AND BRAIN METASTASES FROM LUNG CANCER 4YM BIOSCIENCES RECEIVES CLEARANCE TO INITIATE RANDOMIZED DOUBLE-BLIND CLINICAL TRIALS OF NIMOTUZUMAB IN LUNG CANCER AND BRAIN METASTASES FROM LUNG CANCER 5YM BIOSCIENCES RECEIVES CLEARANCE TO INITIATE RANDOMIZED DOUBLE-BLIND CLINICAL TRIALS OF NIMOTUZUMAB IN LUNG CANCER AND BRAIN METASTASES FROM LUNG CANCER 6YM BIOSCIENCES RECEIVES CLEARANCE TO INITIATE RANDOMIZED DOUBLE-BLIND CLINICAL TRIALS OF NIMOTUZUMAB IN LUNG CANCER AND BRAIN METASTASES FROM LUNG CANCER 7Research Published in Nature Medicine Shows Disruption of Chemokine Interactions Inhibits Atherosclerosis in Mice 2Research Published in Nature Medicine Shows Disruption of Chemokine Interactions Inhibits Atherosclerosis in Mice 3
... coli containing a clone of the human Topoisomerase ... II alters the topological state of nucleic acids ... transient break which generates a separate DNA helix ... DNA passage mechanism, the enzyme can relax negatively ...
RNase-Free DNase 50 l...
supplied with 10x reaction buffer...
... RNase H degrades, as an endoribonuclease, ... DNA hybrids of natural origin, e.g. ... synthetic complexes, e.g. poly(A) x poly(dT). ... and 3-OH termini. Nearly no activity ...
Biology Products: