Influence of riparian buffer width on bird assemblages in western Oregon

  • Published source details Hagar J.C. (1999) Influence of riparian buffer width on bird assemblages in western Oregon. Journal of Wildlife Management, 63, 484-496.


This study is summarised as evidence for the following.

Action Category

Provide or retain un-harvested buffer strips

Action Link
Bird Conservation
  1. Provide or retain un-harvested buffer strips

    A replicated, controlled study from May-June in 1994 in 12 riparian buffer-strip (18-70 m wide) sites and four unlogged riparian sites of old-growth forest in Oregon, USA (Hagar 1999) found that 27 species were recorded at unlogged and 42 species at buffer-strip sites:  eight species were more abundant in unlogged and 12 species more abundant in buffer-strip sites. Four species that were more abundant in unlogged stands increased with increasing width of riparian buffers. However, four other species were rarely observed in even the widest buffers sampled (40-70 m). Overall, bird species richness and abundance were not related to buffer-strip width, but the author recommends buffer widths >40 m and maintaining a high density of trees within the buffer.

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