HOME >> BIOLOGY >> NEWS
Bison Grazing Increases Biodiversity In Grasslands

Grazing by herbivorous mammals like bison increases biodiversity in North American grasslands, says National Science Foundation (NSF) ecologist Scott Collins, even during periods of frequent burning and other stresses. In fact, loss of species diversity in these grasslands due to frequent burning was reversed by bison grazing, according to Collins.

"Thus, reestablishing grazing in grasslands stressed by human activities enhances biodiversity," says the scientist. Collins' research results are published in this week's issue of the journal Science. His work was conducted at NSF's Konza Prairie Long-Term Ecological Research (LTER) site in northeastern Kansas, one of a network of 20 such NSF sites in North America and Antarctica.

Species diversity has declined in ecosystems worldwide due to habitat fragmentation, eutrophication, and land-use changes, scientists believe.

Collins and his colleagues conducted two long-term field experiments in native grasslands to assess effects of fire, addition of nitrogen, and grazing on plant species diversity. In one experiment, species richness declined on burned and fertilized areas, whereas grazing maintained diversity under these conditions. In a second experiment, loss of species diversity due to frequent burning was reversed by bison, animals that Collins calls keystone herbivores in North American grasslands.

In North American tallgrass prairies, diversity and productivity are controlled to a large extent by nitrogen availability, Collins explains. Historically, nitrogen availability in prairies was driven by interactions between frequency of fires and grazing by large herbivores. In general, spring fires enhance growth of certain grasses, and herbivores such as bison preferentially graze these grasses, keeping a system of checks and balances working properly, and allowing many plant species to flourish.

"Extirpation of native grazers, habitat fragmentation, increased
'"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-306-1070
National Science Foundation
30-Apr-1998


Page: 1 2

Related biology news :

1. Solution To Bison-Cattle Conflict In Yellowstone
2. LSU Ag Center Brucellosis Specialist May Help Stem Bison Controversy
3. Colorado State University Study Reveals Climate Change, Longer Growing Seasons Could Harm Grazing On Western Shortgrass Steppe
4. Mowing, Grazing Of Tall-Grass Prairie Increases
5. Study Suggests Vaccine Increases Survival In Ovarian And Breast Cancer Patients Following High-Dose Chemotherapy And Autologous Stem Cell Transplant
6. Stress Increases Blood Chemical Related To Heart Disease
7. Severe Falciparum Malaria Increases In Honduras
8. Lower Temperature Increases Virus Production
9. Survey Shows Students Turning To Physicians Less As Drug Abuse Increases
10. Intake Of Acetaminophen Increases Risk Of Excessive Anticoagulation In Patients Taking Warfarin
11. Iron Deficiency Increases Likelihood Of Bone Fractures

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Bison Grazing Increases Biodiversity Grasslands

(Date:10/14/2014)... research team has discovered a new kind of stem cell ... that lines liver blood vessels, according to a study published ... existence of such a cell type contradicts current theory on ... may hold clues to origins of, and future treatment for, ... single cell into a complex being made up of more ...
(Date:10/14/2014)... LA JOLLA, CA – October 14, 2014 – Scientists ... $6.6 million from the National Institutes of Health (NIH) ... most prevalent virus-induced hemorrhagic fever disease in Africa. The ... disease and why some patients die, while others survive ... researchers to understand the basic mechanism of how Lassa ...
(Date:10/14/2014)... researchers, led by the Chinese Academy of Agricultural Sciences ... a brief genomic history of tomato breeding, based ... , The C.M. Rick Tomato Genetics Resource Center at ... by providing seed of both cultivated tomato varieties and ... the first tomato genome sequence completed just two years ...
Breaking Biology News(10 mins):Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 2Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 3Scripps Research Institute team receives $6.6 million to investigate deadly Lassa virus 2
(Date:10/19/2014)... The Latin American hardware encryption display market report defines ... and forecast of revenue. This market was valued at ... $2,366.8 million by 2018, at a CAGR of 70.3% ... of the Latin American hardware encryption market report to ... also provides a glimpse of the segmentation of the ...
(Date:10/19/2014)... The Asian Automatic patient billing report defines ... forecast of revenue. The Automatic patient billing market in ... by 2018, at a developing CAGR of 7.2% from ... the Asian Automatic patient billing market, to get an ... a glimpse of the segmentation of this market in ...
(Date:10/19/2014)... The report "Unmanned Ground Vehicle Market ... Payload, Type & by Geography - Forecasts & ... ground vehicle market into various sub segments with ... The report also identifies the factors driving this ... with the adoption trends. , The unmanned ground ...
(Date:10/18/2014)... The report "1,6-Hexanediol Market by Application and ... analyzes the global market on the basis of ... details such as the key drivers, current trends ... Browse 81 Market Data Tables and 29 Figures ... “1,6-Hexanediol Market by Application and by Geography - ...
Breaking Biology Technology:The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 3The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 3Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 2Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 3Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 4Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 51,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 21,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 31,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 41,6-Hexanediol Market Projected to Reach $916.1 Million at a CAGR of 8.3% by 2019 – Report by MarketsandMarkets 5
Cached News: