生境破碎化对动物种群存活的影响.pdfVIP

23 11 Vol. 23, No . 11 2003 11 ACT A ECOLOGICA SINICA Nov . , 2003 武正军, 李义明* ( , 100080) : , , , , , : , , 3S , , : ; ; ; ; Effects of habitat fragmentation on survival of animal populations ( , , 100080, ) . WU Zheng-Jun, LI Yi-Ming Institute of Zoology Chinese A cademy of S ciences Be ij ing China Ac - ta Ecologica Sin ica , 2003, 23( 11) : Abstract: As one of major factors at tributed to the loss of biodiversit y, habitat fragment ation has become one of central issues in conservation biology and ecology . Alt hough theories of island biogeography, metapopulat ion and landscape ecology have been developed t o mainly explain effects of habit at fragmenta- tion, it is still immature to get generally comprehensive insight on it . M ore recently , habitat fragmentation . has m ainly been used t o strictly refer t o the change in spatial configuration of fragmented patches Simula- tion models and some statist ical studies suggested t hat there might be a threshold in proportion of suitable . habitat in landscape below which populations decrease very quic ly Distinguishing relative effect s of habi- tat fragm entation and habitat loss on populat ion extinction threshold has important implication for conser- vation, but empirical evidences are st ill of scarce in testing t he effect of fragmentat ion on the population . , extinction t hreshold Because edge effect area effect and isolation effect can influen