Effects of twice-over rotational grazing on songbird nesting success in years with and without flooding

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dc.contributor.authorCarnochan, Stacey
dc.contributor.authorDe Ruyck, Christopher
dc.contributor.authorKoper, Nicola
dc.date.accessioned2019-06-11T17:44:14Z
dc.date.available2019-06-11T17:44:14Z
dc.date.issued2018
dc.date.submitted2019-06-11T17:33:18Zen
dc.description.abstractRotational grazing is sometimes promoted for grassland bird conservation, but the benefits to wildlife have not been comprehensively documented. We examined effects of twice-over rotational grazing on nesting success of grassland songbirds in south-western Manitoba, Canada in comparison to season-long grazing. We monitored nesting attempts and collected structural vegetation data in 2011 (during a 1/300 flood event), and 2012 (average water levels), for five species of obligate grassland bird species (n=110) and one shrub-nesting species (n=41). Nesting analyses were conducted using logistic exposure models. Nesting success was 2.4-4 times lower in twice-over grazed pastures compared with season-long grazed pastures, perhaps because of the increased cattle density during the short grazing periods of the twice-over system. Nests protected by shrubs from grazing activities of cattle did not show this pattern. Grazing system did not have an effect on vegetation structure. This suggests that twice-over rotational grazing does not benefit grassland songbirds in northern mixed-grass prairies, and that caution must be taken before implementing this grazing system in areas intended to promote biodiversity conservation.en_US
dc.identifier.citationCarnochan, S. J., De Ruyck, C., and Koper, N. 2018. Effects of twice-over rotational grazing on songbird nesting success in years with and without flooding. Rangeland Ecology and Management. 71: 776-782.en_US
dc.identifier.doihttps://doi.org/10.1016/j.rama.2018.04.013
dc.identifier.urihttp://hdl.handle.net/1993/33971
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsopen accessen_US
dc.subjectMixed-grass prairie, rangeland management, rotational grazing, season-long grazing, twice-over grazing, nesting successen_US
dc.titleEffects of twice-over rotational grazing on songbird nesting success in years with and without floodingen_US
dc.typeArticleen_US
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