Habitat associations of Mexican Spotted Owl nest and roost sites in Central Arizona.(Author Abstract): An article from: Wilson Bulletin
Book Details
Author(s)Christopher A. May, R.J. Gutierrez
PublisherWilson Ornithological Society
ISBN / ASINB0008DSGU0
ISBN-13978B0008DSGU8
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Wilson Bulletin, published by Wilson Ornithological Society on December 1, 2002. The length of the article is 7297 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: We analyzed landscape characteristics surrounding Mexican Spotted Owl (Strix occidentalis lucida) nest and roost trees in Arizona at three spatial scales: one circular plot of 201 ha (800-m radius) and two 400-m-wide "ring" plots between 800 m and 1,600 m from each nest or roost tree. The percentages of vegetation types were significantly different between 51 owl and 51 random areas only within the 201-ha circular plots. Owls selected both mature and young mixed conifer forests that had high canopy closure ([greater than or equal to]55%) more than expected based on availability. Owls selected pine (Pinus spp.) and pine-oak (Quercus spp.) forests in proportion to availability. Forty-one percent of all nests and roosts were located in mixed conifer forests, even though this forest type covered only 5% of the study area. Pine and pine-oak forests covered 78% of the study area, and 59% of nests and roosts were located in these forest types. The only forest type in which we did not locate nests and roo sts was mature open canopy ponderosa pine (P. ponderosa) forest. Owls occupied areas of predominantly younger forests, but only if residual large ([greater than or equal to]45.7 cm dbh) trees were present. Indices of landscape structure did not differ significantly between owl and random areas. Future management of Mexican Spotted Owls in areas of moderate topographic relief should focus on retention of mature forests, especially mixed conifer stands with canopy closure [greater than or equal to]55%. Residual large trees, especially Gambel oaks (Q. gambelii), are important microhabitat components in younger forests.
Citation Details
Title: Habitat associations of Mexican Spotted Owl nest and roost sites in Central Arizona.(Author Abstract)
Author: Christopher A. May
Publication:Wilson Bulletin (Refereed)
Date: December 1, 2002
Publisher: Wilson Ornithological Society
Volume: 114 Issue: 4 Page: 457(10)
Article Type: Author Abstract
Distributed by Thomson Gale
From the author: We analyzed landscape characteristics surrounding Mexican Spotted Owl (Strix occidentalis lucida) nest and roost trees in Arizona at three spatial scales: one circular plot of 201 ha (800-m radius) and two 400-m-wide "ring" plots between 800 m and 1,600 m from each nest or roost tree. The percentages of vegetation types were significantly different between 51 owl and 51 random areas only within the 201-ha circular plots. Owls selected both mature and young mixed conifer forests that had high canopy closure ([greater than or equal to]55%) more than expected based on availability. Owls selected pine (Pinus spp.) and pine-oak (Quercus spp.) forests in proportion to availability. Forty-one percent of all nests and roosts were located in mixed conifer forests, even though this forest type covered only 5% of the study area. Pine and pine-oak forests covered 78% of the study area, and 59% of nests and roosts were located in these forest types. The only forest type in which we did not locate nests and roo sts was mature open canopy ponderosa pine (P. ponderosa) forest. Owls occupied areas of predominantly younger forests, but only if residual large ([greater than or equal to]45.7 cm dbh) trees were present. Indices of landscape structure did not differ significantly between owl and random areas. Future management of Mexican Spotted Owls in areas of moderate topographic relief should focus on retention of mature forests, especially mixed conifer stands with canopy closure [greater than or equal to]55%. Residual large trees, especially Gambel oaks (Q. gambelii), are important microhabitat components in younger forests.
Citation Details
Title: Habitat associations of Mexican Spotted Owl nest and roost sites in Central Arizona.(Author Abstract)
Author: Christopher A. May
Publication:Wilson Bulletin (Refereed)
Date: December 1, 2002
Publisher: Wilson Ornithological Society
Volume: 114 Issue: 4 Page: 457(10)
Article Type: Author Abstract
Distributed by Thomson Gale
