HOME >> BIOLOGY >> NEWS
Catastrophic shift in species diversity and productivity of an ecosystem

Ecology and environmental management is largely predicated on the view that ecosystems respond to environmental changes in a smooth and straightforward way. However, in Ecology Letters, May, Schmitz reports on a long-term field experiment that may prompt a hard, critical look at this reigning view. In the experimental system, top predators instrumentally control species diversity and productivity of the ecosystem. This control comes about by causing herbivores to feed on and suppress the abundance of a highly productive plant that otherwise would out-compete many other plant species. Alteration of this control by a predator removal experiment caused rapid increase in the abundance of the competitive dominant plant. It also caused an abrupt, catastrophic loss of plant species diversity. Attempts to restore plant diversity by reintroducing the predators back into the system failed. This failure happened because the ecosystem became locked into an alternate stable state in which herbivores were incapable of suppressing the now highly productive, competitively dominant plant. The study provides a cautionary tale that ecosystem management which alters predator abundances even slightly may cause dramatic and irreversible shifts in the productivity and diversity of ecosystems.


'"/>

Contact: Kate Stinchcombe
kate.stinchcombe@oxon.blackwellpublishing.com
Blackwell Publishing Ltd.
4-May-2004


Page: 1

Related biology news :

1. Catastrophic decline of Africas apes, Nature says
2. Catastrophic draining of huge lakes tied to ancient global cooling event
3. Evidence for sympatric speciation by host shift in the sea
4. Biological oceanographers examine regime shifts in complex marine ecosystems
5. Hormonal changes in satisfied and dissatisfied shift workers across a shift cycle
6. Research reveals use of tree rings and ocean temperature shifts in anticipating megadroughts
7. Rare fossilized tube feet suggest functional shift through time
8. Clues from analysis of fish bones supports theory of climate shift 5000 years ago, onset of El Nio
9. Hebrew University and Ben-Gurion researchers find that stress causes shift in gene products
10. Frequent pressure shifts increase risk of blindness in glaucoma patients
11. Population shifts, not storms, have caused rise in property losses

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/6/2019)... ... ... Keck Graduate Institute (KGI) President Sheldon Schuster has announced Martin Zdanowicz as the ... is highly regarded as an innovative leader who prioritizes student success and faculty development,” ... build on the success of the KGI School of Pharmacy and Health Sciences.” , ...
(Date:8/1/2019)... ... August 01, 2019 , ... The GENSPEED platform is a compact, fast and ... fully developed with over 100 units deployed in the field for multiple applications. ... collaboration with axiVEND will give us a foothold in the USA to better support ...
(Date:8/1/2019)... ... 2019 , ... USDM Life Sciences (USDM) announces that Jay Crowley, Vice President ... addressing challenges with the upcoming EU MDR IVDR regulations . , ... variety of positions over his 26 years at the FDA, including developing the framework ...
Breaking Biology News(10 mins):
(Date:6/18/2019)... YORK and SOMERSET, N.J. (PRWEB) , ... June ... ... Catalent Biologics, today announced that they have entered into an agreement for production ... product candidates, IC-100 for the treatment of rhodopsin-mediated autosomal dominant retinitis pigmentosa (RHO-adRP) ...
(Date:6/12/2019)... EGG HARBOR TOWNSHIP, N.J. (PRWEB) , ... June ... ... premier manufacturer of custom built, helium-based leak testing instruments for the Pharmaceutical, Biotechnology, ... partnership agreement with Shanghai Zillion has been signed. The agreement will grant exclusive ...
(Date:6/11/2019)... ... June 10, 2019 , ... ... in an upcoming episode, scheduled to broadcast 4Q/2019. Check your local listings for ... will educate viewers about how its technology facilitates laboratories to improve efficiency and ...
(Date:6/11/2019)... ... June 11, 2019 , ... Mytonomy, the ... national leader in opioid treatment, announced today they are partnering to combat the ... recently deployed its virtual care platform at the Mayo Clinic to drive shared ...
Breaking Biology Technology:
Cached News: