Individual study: Four native sparrow species exhibit poor reproductive success on reclaimed surface coal mine grassland at Valley Point, West Virginia, USA
Wray II T., Strait K.A. & Whitmore R.C. (1982) Reproductive success of grassland sparrows on a reclaimed surface mine in West Virginia. The Auk, 99, 157-164
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Restore or create grasslands
A replicated, controlled study in 1978-1980 on a 41.5 ha reclaimed coal mine site in West Virginia, USA (Wray et al. 1982), found that clutch sizes of grasshopper, savannah Passerculus sandwichensis, vesper Pooecetes gramineus and field sparrows Spizella pusilla were similar to those reported for natural grasslands but nest predation rates were high and the main cause of nest failure in all years. Of 185 nests located, 80 (43%) were thought to be predated. Thus, although providing new habitat, low reproductive success suggests that the grassland may not benefit sparrow populations as immigration will be necessary to maintain breeding numbers.