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Home range, habitat selection, and movements of California black rails at tidal marshes at San Francisco Bay, California

The Condor

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Abstract

Little is known about the movements and habitat selection of California Black Rails (Laterallus jamaicensis coturniculus) in coastal California. We captured 130 Black Rails, of which we radio-marked 48, in tidal marshes in San Francisco Bay during 2005 and 2006. Our objective was to examine their home ranges, movements, and habitat selection to improve the species' conservation. The mean fixed-kernel home range was 0.59 ha, the mean core area was 0.14 ha. Home ranges and core areas did not differ by year or site. Males had significantly larger home ranges and core areas than did females. All sites combined, Black Rails used areas with > or = 94% total vegetative cover, with perennial pickleweed (Sarcocornia pacifica) the dominant plant. The rails' habitat selection varied by year and site but not by sex. A multivariate analysis of variance indicated that Black Rails selected areas with pickleweed taller and denser than average, greater cover and height of alkali bulrush (Bolboschoenus maritimus) and common saltgrass (Distichlis spicata), more stems between 20 and 30 cm above the ground, maximum vegetation height, and shorter distance to refugia. On average, Black Rails moved 27.6 +/- 1.8 (SE) m daily and 38.4 +/- 5.5 m during extreme high tides. Understanding the California Black Rail's movements, home range, and habitat use is critical for management to benefit the species.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Home range, habitat selection, and movements of California black rails at tidal marshes at San Francisco Bay, California
Series title:
The Condor
Volume
111
Issue:
4
Year Published:
2009
Language:
English
Publisher:
Cooper Ornithological Society
Publisher location:
Norman, OK
Contributing office(s):
Western Ecological Research Center
Description:
12 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
599
Last page:
610
Number of Pages:
11
Country:
United States
State:
California
Other Geospatial:
San Francisco Bay