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Comparison Of Microclimate At Grassland Bird Nests With Different Substrates, Kimberly M. Suedkamp Wells, Samuel D. Fuhlendore
Comparison Of Microclimate At Grassland Bird Nests With Different Substrates, Kimberly M. Suedkamp Wells, Samuel D. Fuhlendore
The Prairie Naturalist
We compared the effects of two different nest placement strategies (shrubs vs. bunchgrasses) on microclimate conditions for grasshopper sparrow (Ammodramus savannarum) and lark sparrow (Chondestes grammacus) in Oklahoma. We predicted that the intensity and duration of extreme temperatures (greater than 39° C) and their variability would be reduced at shrub nests compared to bunchgrass nests. A verage maximum temperatures were similar at nests of grasshopper sparrow and lark sparrow, but confidence intervals were more variable and included biologically detrimental temperatures at grasshopper sparrow nests compared to lark sparrow nests. The proportion of time greater than 39° …