Navigation Links
Loss of top animal predators has massive ecological effects
Date:7/14/2011

STONY BROOK, NY"Trophic Downgrading of Planet Earth," a review paper that will be published on July 15, 2011, in the journal Science, concludes that the decline of large predators and herbivores in all regions of the world is causing substantial changes to Earth's terrestrial, freshwater, and marine ecosystems. The paper claims that the loss of apex consumers from ecosystems "may be humankind's most pervasive influence on nature." The research was funded primarily by the Institute for Ocean Conservation Science at Stony Brook University with support from The Pew Charitable Trusts. The paper is co-authored by the Institute's executive director, Dr. Ellen K. Pikitch, and the lead author is Dr. James A. Estes, professor of ecology and evolution at the University of California at Santa Cruz.

The review, conducted by an international team of 24 scientists, illuminates the patterns and far-reaching impacts of predation and herbivory on the structure and dynamics of global ecosystems. The researchers relied on both experimental and observational evidence, which provides a strong basis for their conclusions.

"By looking at ecosystems primarily from the bottom up, scientists and resource managers have been focusing on only half of a very complex equation," said Dr. Estes. "These findings demonstrate that top consumers in the food web are enormous influencers of the structure, function, and biodiversity of most natural ecosystems."

Apex consumers include animals such as big cats, wolves, bison, sharks, and great whales, and are typically large, long-lived, and not amenable to laboratory experiments. As a result, the effects of removing them from ecosystems are not easy to document. The team of scientists reviewed an accumulation of theoretical and empirical evidence on how the decline of top predators and herbivores has affected Earth's ecosystems on land, in freshwater, and in the ocean. Their findings suggest that "trophic downgrading
'/>"/>

Contact: Cindy Yeast
cdyeast@earthlink.net
720-542-9455
Stony Brook University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. Researchers find animal with ability to survive climate change
3. Researchers note differences between people and animals on calorie restriction
4. Earliest animal footprints ever found -- discovered in Nevada
5. Details of evolutionary transition from fish to land animals revealed
6. Drug-embedded microparticles bolster heart function in animal studies
7. Swamping bad cells with good in ALS animal models helps sustain breathing
8. Moderate use averts failure of type 2 diabetes drugs in animal model
9. Grapes may aid a bunch of heart risk factors, animal study finds
10. Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25
11. Discovery of giant roaming deep sea protist provides new perspective on animal evolution
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Loss of top animal predators has massive ecological effects
(Date:9/19/2014)... it the Jimmy Durante of dinosaurs a ... profile. The new dinosaur, named Rhinorex condrupus ... and Brigham Young University, lived in what is ... the Late Cretaceous period. , Rhinorex, which translates ... a close relative of other Cretaceous hadrosaurs like ...
(Date:9/19/2014)... unveiled today by researchers from several Harvard University ... both experienced and aspiring researchers with the intellectual ... robots made from soft, flexible materials. , With ... and other advances in manufacturing technology, soft robotics ... principles drawn from conventional rigid robot design, but ...
(Date:9/19/2014)... study the unique bioelectric signaling system of the electric ... The OU researcher is working to understand how ... signals used to map the world around them. ... 500-600 discharges a second throughout their lives. The ... but necessary for survival. , "There is evidence that ...
Breaking Biology News(10 mins):New hadrosaur noses into spotlight 2Soft robotics 'toolkit' features everything a robot-maker needs 2
... aquatic organisms by the discharge of certain steroids and pharmaceutical ... as the compounds degrade, the ecological risks naturally decline. ... of these bioactive organic compounds may transform in a way ... study led by the University of Iowa and published online ...
... of Health (NIH) has launched the first phase of the ... that aims to improve access to and analysis of data ... of genetic information on the microbes that naturally colonize our ... available as a free public dataset , allowing users ...
... SANTA MONICA, CA -- A new urine test for ... now commercially available to men nationwide through the University ... utility of the PSA blood test, increases physicians, ability ... in patients, and may help tens of thousands of ...
Cached Biology News:Study finds steroids may persist longer in the environment than expected 2Study finds steroids may persist longer in the environment than expected 3NIH launches first phase of microbiome cloud project 2Prostate Cancer Foundation announces new urine test for prostate cancer available 2Prostate Cancer Foundation announces new urine test for prostate cancer available 3
(Date:9/19/2014)... disease risks, the biological characteristics people care most about ... heightthe textbook example of a complex traitattributes like risk ... genetic and environmental influences, making it challenging to find ... typically mate two individuals that differ in key waysfor ... study their descendents, looking for genes that tend to ...
(Date:9/19/2014)... September 18, 2014 Scientists at NYU Langone Medical ... the efficiency of the process for turning adult cells ... compounds, including vitamin C. Using the new technique in ... obtained from adult skin cells by more than 20-fold ... is efficient and reliable, and thus should generally accelerate ...
(Date:9/19/2014)... that use light, rather than electricity, to move ... energy efficiency is a growing concern as chips, ... components of optical circuits light emitters, modulators, ... build. One promising light source for optical chips ... properties when deposited as a single, atom-thick layer. ...
(Date:9/19/2014)... 19, 2014 Follow us ... to revolutionize the world has attracted diverse players ... small start-ups. The early years of nanotechnology development ... due to the high risks involved, which deterred ... for this evolving technology have been growing over ...
Breaking Biology Technology:Want to link genes to complex traits? Start with more diversity 2NYU Langone scientists report reliable and highly efficient method for making stem cells 2NYU Langone scientists report reliable and highly efficient method for making stem cells 3Toward optical chips 2Toward optical chips 3Growing R&D Investments & Developments in Nanomaterials to Drive the Global Nanotechnology Market, According to New Report by Global Industry Analysts, Inc. 2Growing R&D Investments & Developments in Nanomaterials to Drive the Global Nanotechnology Market, According to New Report by Global Industry Analysts, Inc. 3Growing R&D Investments & Developments in Nanomaterials to Drive the Global Nanotechnology Market, According to New Report by Global Industry Analysts, Inc. 4
... are used in a wide variety of applications ... and aerospace applications. Thermal analysis is routinely used ... growing trend to use nanostructured materials has made ... an atomic force microscope-based technique called nanoscale thermal ...
... laboratory has found a way to turn common carbon ... with properties expected to prove useful in electronic, optical ... scientist Pulickel Ajayan, in collaboration with colleagues in China, ... one-step chemical process that is markedly simpler than established ...
... cell therapy manufacturing division, Progenitor Cell Therapy ("PCT"), ... NBS ) ("NeoStem" or the "Company"), announced today ... and regulatory services related to the development of ... injectable suspension of microencapsulated insulin-producing, pancreatic islet cells ...
Cached Biology Technology:Magnetic actuation enables nanoscale thermal analysis 2Graphene quantum dots: The next big small thing 2Graphene quantum dots: The next big small thing 3Islet Sciences, Inc. Selects NeoStem's Manufacturing Subsidiary Progenitor Cell Therapy for Product Manufacturing 2Islet Sciences, Inc. Selects NeoStem's Manufacturing Subsidiary Progenitor Cell Therapy for Product Manufacturing 3Islet Sciences, Inc. Selects NeoStem's Manufacturing Subsidiary Progenitor Cell Therapy for Product Manufacturing 4
Recommended for use as a cell culture substratum at 0.1-0.2 mg/cm 2 or 5-10 μl/cm 2 . Optimal concentration depends on cell type as well as the application or research objectives. Type B...
Monoclonal antibodies conjugated with rhodamine...
... a trademark of Merck KGaA. Physical form: Solution in ... 2 mM MgCl 2 , and 20 mM NaCl ... sperm DNA to acid-soluble oligonucleotides equivalent to a ΔA ... 8.0 at 37 C (reaction volume 2.625 ml). Assay: ...
Mouse polyclonal antibody to BTG2 - BTG family, member 2...
Biology Products: