欢腾
发表于 2025-3-26 22:05:33
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祸害隐伏
发表于 2025-3-27 04:24:34
Caryad,Thomas Römer,Vera Zingsemction are analysed by taxonomic group, against time, and between islands and continental land masses. From species—area curves based upon extrapolation of the rate of habitat loss (particularly tropical forests) estimates have been produced of the future rates of species extinctions. These estimates
angiography
发表于 2025-3-27 06:45:57
inct in nature as the result of large-scale habitat changes over the next few hundred years (Soulé .., 1986). One assumption necessary to fulfill this goal is that there will be a natural community waiting to receive the species to be reintroduced. This assumption may not be warranted for two reason
冷淡一切
发表于 2025-3-27 11:38:46
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insolence
发表于 2025-3-27 13:58:54
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流浪者
发表于 2025-3-27 21:27:31
netic units each species contains (Avise, 1989, 1992; May, 1990; Vane-Wright, Humphries and Williams, 1991; Dizon .., 1992). This paper includes a brief discussion of definitions of species and their population subdivisions, the genetic costs and risks associated with conservation programmes focused
即席
发表于 2025-3-28 00:47:49
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垫子
发表于 2025-3-28 05:06:43
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WAIL
发表于 2025-3-28 09:11:18
Zusammenfassung und Gesamtausblick,ly practical changes to the way zoo animals are kept can have highly beneficial effects on their behaviour and physiology. Carlstead, Seidensticker and Baldwin (1991), for example, found that providing bears with hidden food and manipulable objects greatly increased activity and exploration at the e
一个姐姐
发表于 2025-3-28 11:35:53
Warum lohnt sich der Blick ins Gehirn?,ny that the Romans artificially extended the natural range of the rabbit (.) from southern Spain to most of western Europe (although the Normans are credited with the introduction of the species into Britain). The Romans, too, are said to have moved the fallow deer (.) from its ancestral range in th