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The benefits of crops and field management practices to wintering waterbirds in the Sacramento–San Joaquin River Delta of California

Published online by Cambridge University Press:  29 October 2015

W. David Shuford ,
Matthew E. Reiter ,
Khara M. Strum ,
Michelle M. Gilbert ,
Catherine M. Hickey  and
Gregory H. Golet
W. David Shuford*
Affiliation:
Point Blue Conservation Science, 3820 Cypress Dr., Suite 11, Petaluma, CA 94954, USA.
Matthew E. Reiter
Affiliation:
Point Blue Conservation Science, TomKat Field Station, P.O. Box 747, Pescadero, CA 94060, USA.
Khara M. Strum
Affiliation:
Point Blue Conservation Science, 3820 Cypress Dr., Suite 11, Petaluma, CA 94954, USA.
Michelle M. Gilbert
Affiliation:
Point Blue Conservation Science, 3820 Cypress Dr., Suite 11, Petaluma, CA 94954, USA.
Catherine M. Hickey
Affiliation:
Point Blue Conservation Science, 3820 Cypress Dr., Suite 11, Petaluma, CA 94954, USA.
Gregory H. Golet
Affiliation:
The Nature Conservancy, 190 Cohasset Road, Suite 177, Chico, CA 95926, USA.
*
*Corresponding author: [email protected]
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Abstract

Agricultural intensification has been a major factor in the loss of global biodiversity. Still, agricultural landscapes provide important habitat for many bird species, particularly in the Central Valley of California, USA, where >90% of the natural wildlife habitat has been lost. As wildlife professionals increasingly work with agricultural producers to promote ‘wildlife-friendly’ farming, it is important to understand the relative value of specific crops and field management practices to birds. The value to wintering waterbirds of seven treatments (crop and management practice combinations) across two crops (corn and winter wheat) was assessed at Staten Island in the Sacramento–San Joaquin River Delta of the Central Valley. Significant variation in the relative abundance of waterbirds was found among management practices, and post-harvest flooding and chopping and rolling (mulching) of corn were most beneficial to waterbirds. As expected, most waterbirds were common in flooded treatments, but geese, cranes and long-legged waders also were numerous in some dry treatments. Our data suggest that a greater waterbird species richness and abundance can be achieved by maintaining a mosaic of dry and flooded crop types, varying water depths and continuing the chop-and-roll practice for flooded corn. The observed benefits of particular crops and field management practices in this study should aid in the development of incentive-based programs to improve the habitat value of other working lands both within, and outside, the Delta.

Keywords

waterbird diversitycornwinter wheatwildlife-friendly agriculturebeneficial field management practices
Type
Research Papers
Information
Renewable Agriculture and Food Systems , Volume 31 , Issue 6 , December 2016 , pp. 495 - 506
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Copyright
Copyright © Cambridge University Press 2015 

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