such as "Introduction", "Conclusion"..etc
As scientists, conservationists, and policy-makers wrestle with how to
balance development with maintaining biodiversity, it's important to
understand what controls patterns of biodiversity and how the
biodiversity of a system will respond to different environmental
A new study by Mark Vellend in the August 2005 issue of The American
Naturalist is the first to provide a theoretical model showing that the
two central measures of biodiversity--the number of species in a system
and the number of genetic variants within a specific species--respond
similarly to changes in their environment.
For both measures, biodiversity is higher in scenarios with larger
parcels of habitat available and where patches of intact habitat are
closer together. These results concur with field observations and
indicate that human activities that affect one type of biodiversity,
such as causing the extinction of species, will produce a similar
response in other measures of biodiversity.
For example, it has been shown that both species diversity and
genetic diversity of forest plants remain at similarly low levels in
secondary forests relative to primary forests, even when secondary
forests are upwards of 100 years old.
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