The foraging of hedgerow birds in four types of vegetation in Karbach
Abstract
For guideing conservation of birds, and furnishing fresh evidence to "optimal foraging strategy (OFS)". This study was made in the foraging of hedgerow birds in four types of vegetation (OM-overgrown meadow, MM-managed meadow, GM-grazed meadow, and DV-dry grass vegetation) through the non-breeding season. The results shown: (1) There is no significant difference distribution of the invertebrate in four types of the vegetation (F ratio = 0.258. P = 0.856), however there is significant difference foraging rate of birds (F ratio = 3.519, P = 0.193). (2) There is negative regression between the highness of fresh grass and the foraging rate of birds in the three types of fresh meadow (r2 = 0,996, intercept = -14.55, slope = 14.358). This investigation highlights the importance of CM (3) In DV, the forage of birds was less than both in MM and GM, but many birds fed there, and the forage species was the most one in four types of the vegetation. The analysis shows (1) the foraging of the hedgerow birds should follows OFS, and (2)the most is the diversity of dry grass, the most is the diversity of forage species in the four types of the vegetation.
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