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RECORD NUMBER: 28 OF 120

OLS Field Name OLS Field Data
Main Title Landscape Connectivity: Different Functions at Different Scales.
Author Noss., R. F. ;
CORP Author Corvallis Environmental Research Lab., OR.
Publisher 1990
Year Published 1990
Report Number EPA/600/D-90/079;
Stock Number PB90-246372
Additional Subjects Climatic changes ; Biogeography ; Ecology ; Spatial distribution ; Management planning ; Vegetation ; Dispersing ; Reprints ; Habitats ; Environmental effects ; Conservation law ; Biocompatibility ; Species diversity ; Temporal distribution ; Natural resources management ; Biological evolution ; Basic interactions ; Landscape
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB90-246372 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 12/03/1990
Collation 14p
Abstract
Connectivity is more than corridors, and corridors are more than linear strips of habitat. Rather, connectivity involves linkages of habitats, species, communities, and ecological processes at spatial scales ranging from fencerows to biomes, and at temporal scales ranging from daily movements of animals to migrations of floras and faunas as climate changes over centuries and millennia. Any piece of land or water may be either a corridor or a barrier to dispersal, depending on the life histories of the organisms concerned. Biogeographers use the term 'filters' to describe areas through which organisms disperse, because species that are poor at dispersing through the habitats involved will be selectively removed. Human activity may either increase connectivity (favoring biological invasions) or decrease connectivity (favoring extinction of isolated populations). Roads are particularly troublesome as barriers, conduits for exotic invasions, and mortality sinks. A general recommendation for conservation of biological diversity is to maintain landscapes with high connectivity of natural habitats, but with low connectivity of artificial habitats such as roadsides, clearcuts, and agricultural fields. Special attention should be given to the needs of species that require broad corridors of habitat with little disturbance by humans, to minimizing opportunities for spread of exotic species, and to maintaining corridors at regional and continental scales to accomodate migration of all native species as climate changes.