Bird use of Conservation Reserve Program fields enrolled in the CP1 (cool-season grasses and legumes) and CP2 (warm-season native grasses) options in south-east Nebraska, USA
Published source details
Delisle J.M. & Savidge J.A. (1997) Avian use and vegetation characteristics of Conservation Reserve Program fields. The Journal of Wildlife Management, 61, 318-325
Published source details Delisle J.M. & Savidge J.A. (1997) Avian use and vegetation characteristics of Conservation Reserve Program fields. The Journal of Wildlife Management, 61, 318-325
This study is summarised as evidence for the following.
Restore or create grasslandsAction Link
Restore or create grasslands
A replicated study from May 1991 to March 1995 in an agricultural landscape in Nebraska, USA (Delisle & Savidge 1997), found that species richness and abundance did not differ between five fields planted with cool-season, non-native, grasses and legumes and five planted with warm-season native grasses (all planted between 1987-1988; all between 20-40 ha). Dickcissels and grasshopper sparrows were the most abundant species during the breeding season (49-78% of total bird abundance). Common yellowthroats Geothlypis trichas and sedge wrens were more abundant on warm-season fields. American tree sparrows Spizella arborea were the most abundant native species during winter and were more abundant on warm-season fields. Bobolinks were significantly more abundant on cool-season fields, as were meadowlarks Sturnella spp. during winter.