Individual study: Effects of nesting cover removal by mowing and spring burning on breeding dabbling ducks Anser spp., Lower Souris National Wildlife Refuge, North Dakota, USA
Martz G.F. (1967) Effects of nesting cover removal on breeding puddle ducks. The Journal of Wildlife Management, 31, 236-247
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Mow or cut natural grasslands
A replicated and controlled study in between five and eight meadows in the Lower Souris National Wildlife Refuge, North Dakota, USA, in 1961-1962 (Martz 1967), found that duck pair density (mainly blue-winged teal Anas discors and gadwall A. strepera) was 6% lower in three areas mown in August than in five control areas. This difference was not significant and gadwall mostly nested in unmanaged areas beside mowed meadows and blue-winged teal frequently nested in mowed meadows. Nest success did not differ significantly between mowed and unmown meadows. A total of 398 nests were surveyed.
Use prescribed burning on grasslands
A replicated and controlled study in meadows in North Dakota, USA (Martz 1967), in 1961 found that there were 38% fewer pairs of ducks in burned areas of meadow, compared to unburned areas. This study is discussed in more detail in ‘Mow natural grasslands’.