Habitat fragmentation’s enduring, and growing, impact on ecological communities seminar

When is the event?

This event has passed

9 December (Alice Holt)
10 December (NRS)

What time is it on?

11:00 & 14:00

Where to meet?

Forest Research
Alice Holt Lodge/ Northern Research Station
Farnham, Surrey/ Roslin Scotland

Do I need to book?

To attend please get in touch with Suzanne.Martin@forestry.gsi.gov.uk (Alice Holt) or Evelyn.Hall@forestry.gsi.gov.uk (NRS) or available as webinar.


Professor Nick Haddad, North Carolina State University will present on this topic in two seminars at Forest Research.

Alice Holt Lodge (Sport and Social Club), 11:00, 9 December 2015
NRS (Library), 14:00, 10 December 2015 or register for the webinar

For a half century, habitat fragmentation has been hypothesized to reduce biological diversity and degrade ecological communities. Drawing on results of long-term, large-scale ecological experiments that have persisted for decades, we test the effects of habitat fragmentation on species richness, community structure, and ecosystem function.

Experiments were created in grassland and forested ecosystems, at a variety of spatial scales, and varying patch size and isolation. We find consistent negative effects of fragmentation in reducing species richness and ecosystem function more than 50% after two decades. In one experiment, the Corridor Project, we test how fragmentation may be overcome by connecting otherwise isolated patches with landscape corridors. We find that the positive effects of corridors accrue nearly immediately, and are stable for nearly two decades so far.

Although recent hypotheses have questioned the role of fragmentation, we find that even after controlling for habitat amount there emerge strong and consistent effects of fragmentation and benefits of corridors.


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