medieval
发表于 2025-3-26 22:46:32
Samuel Pfeiferal reasons and, in particular, because it is often difficult or impossible to identify the real geographic boundaries of a population. Our population models (Figures 2.13 and 3.9) dealt with the problem of organisms moving into and out of the system by incorporating net migration (immigration-emigra
languid
发表于 2025-3-27 02:09:49
Samuel Pfeiferon biology as a discipline (Chap. 1, this Vol.). Early applications of PVA largely focused on the use of demographic models to identify minimum viable population sizes, but the term has since broadened to encompass a much wider range of approaches (Beissinger and Westphal 1998; Chaps. 6,9, this Vol.
白杨鱼
发表于 2025-3-27 06:18:32
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钝剑
发表于 2025-3-27 10:20:25
Samuel Pfeifergue and the Population and Family Study Centre at Brussels. This co-operation has resulted in the joint pUblication of the journal BevoLking en Gezin (Population and Family) in the Dutch language. However, there has been a need for wider circulation of the Dutch language studies and research in the
油膏
发表于 2025-3-27 15:02:32
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FLING
发表于 2025-3-27 20:00:12
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Basilar-Artery
发表于 2025-3-28 01:24:54
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两栖动物
发表于 2025-3-28 05:45:26
Samuel Pfeiferve also been responsible for many serious problems. Here, in this book, attention is focused upon one, perhaps the most important, of these problems: the relationship between Population and Resources. The accelerating growth in world population running in parallel with world economic growth has brou
大气层
发表于 2025-3-28 09:15:15
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Mundane
发表于 2025-3-28 14:16:25
ion, envi ronment, and development. Relatively high population density and small land areas, without much in the way of natural resources, do not provide the best of circumstances for improving the living conditions of the popu lation, especially a fast-growing one. The result is often stunted eco