Habitat fragmentation and the species–area relationship: a focus on total species richness obscures the impact of habitat loss on habitat specialists

Habitat fragmentation and the species– area relationship: a focus on total species richness obscures the impact of habitat loss on habitat specialists

Conservation Biogeography and Macroecology Group, School of Geography and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK, Azorean Biodiversity Group (ABG CITA-A) and Portuguese Platform for Enhancing Ecological Research & Sustainability (PEERS), Departamento de Cîencias Agr arias, University of the Azores, Rua Capit~ao Jo~ao d0 Avila, Pico da Urze, 9700-042, Angra ...

Habitat Loss and Fragmentation

Glossary Cover type A term used by the geographers for a type of mapped feature (e.g., forest, freshwater, or grassland). The dominant natural cover type in a landscape is often used to approximate habitat. Fragmentation per se The breaking apart of habitat while keeping habitat amount constant. Habitat The place where an organism normally lives. Habitat fragmentation The breaking apart of habi...

Habitat fragmentation, species loss, and biological control.

Fragmentation of habitats in the agricultural landscape is a major threat to biological diversity, which is greatly determined by insects. Isolation of habitat fragments resulted in decreased numbers of species as well as reduced effects of natural enemies. Manually established islands of red clover were colonized by most available herbivore species but few parasitoid species. Thus, herbivores ...

Habitat Fragmentation and Species Barriers

Habitat Loss and Changes in the Species-Area Relationship

The species-area relationship (SAR) has been used successfully to predict extinction from extent of habitat reduction. These extinction estimates assume that species have uniformly distributed range requirements and a minimum abundance level required for persistence; how many species are lost depends solely on how much habitat is removed, not on where it is removed. We consider another limiting...