If you need an accessible version of this item please contact JSTOR User Support

Marine Mammals and Their Environment in the Twenty-First Century

John Harwood
Journal of Mammalogy
Vol. 82, No. 3 (Aug., 2001), pp. 630-640
Stable URL: http://www.jstor.org/stable/1383602
Page Count: 11
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Marine Mammals and Their Environment in the Twenty-First Century
Preview not available

Abstract

Critical habitat for marine mammals is defined in terms of the functioning ecological units required for successful breeding and foraging. This definition is used to consider the potential effects of environmental change in the 21st century on abundance and distribution of marine mammals. Critical habitat for breeding can be identified relatively easily for pinnipeds and some coastal and freshwater cetaceans. Critical habitat for foraging is more difficult to define, particularly for pelagic species. However, telemetry-based studies have indicated that relatively localized areas may be particularly important for some species. Habitat degradation, as a result of reduction in prey density and increased risks of mortality due to human activity, is likely to be a problem for most species. Ice-breeding seals, particularly those that are endemic to inland seas and large lakes, are most likely to be affected by climate change. Climate change will also affect distribution and availability of prey in the short and long term. Although highly mobile species, such as marine mammals, can respond more rapidly to effects of climate change than their terrestrial counterparts, central-place foragers, such as many otariid seals, may still be seriously affected.

Page Thumbnails

  • Thumbnail: Page 
630
    630
  • Thumbnail: Page 
631
    631
  • Thumbnail: Page 
632
    632
  • Thumbnail: Page 
633
    633
  • Thumbnail: Page 
634
    634
  • Thumbnail: Page 
635
    635
  • Thumbnail: Page 
636
    636
  • Thumbnail: Page 
637
    637
  • Thumbnail: Page 
638
    638
  • Thumbnail: Page 
639
    639
  • Thumbnail: Page 
640
    640