Effect of forest patch size and isolation on reproductive success of Great Tit in fragmented secondary-forests

Abstract

Abstract: The effect of forest patch size and isolation on reproductive success of Great Tit(Parus major)in fragmented se-condary-forests was studied in Zuojia Natural Protection Area of Jilin Province by collecting data on breeding success,clutch-size,laying date,egg weight,brood-size and number fledged of Great Tit in 18 large(20～30hm²),medium(10～20hm²),and small(6～10hm²)patches,and two extensive forests(>100hm²).All the forest patches were GPS tested.The results showed that isolation had no effect on reproductive success of Great Tit,and Great Tit laid 7.2 days earlier in extensive forests than in all forest patches.Clutches in extensive forests and large forest patches were slightly larger than those in medium and small forest patches,and eggs were heavier in extensive forests than in the patches.Patch size had no effect on brood-size and number fledged.The lost rate of the nests was high in medium and small fo- rest patches because of intense competition.

Key words: Great Tit, Fragment, Forest patch size, Isolation, Reproductive success

CLC Number:

Q958.11

DENG Wenhong, GAO Wei . Effect of forest patch size and isolation on reproductive success of Great Tit in fragmented secondary-forests[J]. Chinese Journal of Applied Ecology, 2001, (4): 527-531.

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