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Wintering shorebirds increase after kelp (macrocystis) recovery

Article Abstract:

Censuses were conducted on wintering shorebird populations along the rocky shoreline in Palos Verdes Peninsula, CA, during periods when kelp was absent and after it had been restored. A comparison of data from both studies revealed that wintering species most associated with rocky shorelines had increased significantly from previous levels, with Black and Ruddy Turnstones exhibiting the greatest increases. It was concluded that kelp restoration along the peninsula was beneficial for local shorebirds and that ecological systems with histories of habitat degradation could still recover.

Author: Bradley, David W., Bradley, Richard A.
Publisher: Cooper Ornithological Society
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1993
Animals, Animal wintering, Shore birds, Shorebirds, Kelps

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Demography of a California least tern colony including effects of the 1982-1983 El Nino

Article Abstract:

A California colony of banded least terns was studied over seven years from 1983 to 1989. The return rate of breeding adults was age-related, being higher for birds four years and older. The rate of return of banded chicks as breeding adults was 0.16 and overall breeding adult survival rate was 0.88. The colony was highly productive, with a productivity ratio greater than 1.0 for all except two seasons. The 1982 to 1983 El Nino sharply reduced food supply, resulting in a large population decrease in the colony and producing a bimodal age distribution.

Author: Atwood, Jonathan L., Massey, Barbara W., Bradley, David W.
Publisher: Cooper Ornithological Society
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1992
El Nino, El Nino Current, Natural history

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Species and subspecies limits in Least Terns

Article Abstract:

A number of evidence support the necessity to taxonomically separate Least Terns (Sterna antillarum) from Little Terns (S. albifrons). Specifically, all Least Tern populations on Americas' west coast should be considered under one subspecies, namely, browni. These developments came at the wake of recent debates on the issues of the specific distinctness of the Least Tern from the Little Tern and the need to apply at least one subspecific name to breeding populations of Least Terns in western Mexico.

Author: Massey, Barbara W.
Publisher: Cooper Ornithological Society
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1998
Identification and classification, Species, Species (Biology)

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Subjects list: Research, Environmental aspects, California, Bird populations, Terns
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