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Old 09-29-2010, 05:53 PM   #1
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Default Grassland biodiversity

http://www.fao.org/ag/AGP/agpc/doc/c...iar/aguiar.pdf
Martin R Aguiar

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First,what are the effects of the main drivers of biodiversity loss, and what are the main trends
in the biodiversity of grasslands?
Second, how will biodiversity continue to change after extinctions take place?
Third,how can we manage grassland biodiversity in the transition to the new scenario?
Quote:
Changes are global and affect all biomes.
These changes will affect humanity through the erosion of the life-support systems of the earth(there will be a reduction in
ecosystem capability to provide natural resources and to process waste.

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Five drivers...land use,climate,nitrogen deposition,biotic exchange, and atmospheric CO2.
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Old 10-06-2010, 11:58 AM   #2
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Grassland ecoservices, are they understood by the general public?

CES - Ecosystem Services Fact Sheets: Ecosystem Services

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What Are Ecosystem Services?
Ecosystem Services are the processes by which the environment produces resources that we often take for granted such as clean water, timber, and habitat for fisheries, and pollination of native and agricultural plants. Whether we find ourselves in the city or a rural area, the ecosystems in which humans live provide goods and services that are very familiar to us.
Ecosystems provide "services" that:
• moderate weather extremes and their impacts
• disperse seeds
• mitigate drought and floods
• protect people from the sun's harmful ultraviolet rays
• cycle and move nutrients
• protect stream and river channels and coastal shores from erosion
• detoxify and decompose wastes
• control agricultural pests
• maintain biodiversity
• generate and preserve soils and renew their fertility
• contribute to climate stability
• purify the air and water
• regulate disease carrying organisms
• pollinate crops and natural vegetation
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How Are Ecosystems Services "Cut Off"
Ecosystems services are so fundamental to life that they are easy to take for granted and so large in scale that it is hard to imagine that human activities could destroy them. Nevertheless, ecosystem services are severely threatened through (1) growth in the scale of human enterprise (population size, per-capita consumption, and effects of technologies to produce goods for consumption) and (2) a mismatch between short-term needs and long-term societal well-being.
Many human activities disrupt, impair or reengineer ecosystems every day including: • runoff of pesticides, fertilizers, and animal wastes
• pollution of land, water, and air resources
• introduction of non-native species
• overharvesting fisheries
• destruction of wetlands
• erosion of soils
• deforestation
• urban sprawl



USDA Forest Service National Grasslands - Ecosystem Services from National Grasslands


PLoS ONE: Rapid Decline of a Grassland System and Its Ecological and Conservation Implications

Rapid Decline of a Grassland System and Its Ecological and Conservation Implications
Pacheco1, Patricia Manzano-Fischer1, Georgina Santos-Barrera2, Juan Cruzado1
1 Instituto de Ecología, Universidad Nacional Autónoma de México, México D.F., México, 2 Facultad de Ciencias, Universidad Nacional Autónoma de México, México D.F. México

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Our data demonstrate the rapid decline of a grassland ecosystem, and documents the dramatic loss in biodiversity over a very short time period concomitant with anthropogenic grassland degradation and the decline of a keystone species.
http://irnr.tamu.edu/uniquebios/Wilk...nddynamics.pdf


North Texas grasslands to be part of ecological project » Abilene Reporter-News

Quote:
The project is geared toward understanding how “big-scale forces” are changing the country’s ecosystem, Keller said.
“Our ecosystems are changing; they are doing so in response to some really important big-scale forces, and those are the change in climate, the change in how we are using the land and the change in how species are distributed over our national territory,” he said.
Quote:
The information will be available to anyone who wants “to come and get it,” Keller said.
“We’re not just a science organization; we’re an education organization. Our education goal is to make the citizens of the country more ecologically literate,” he said.
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