chapel 发表于 2025-3-25 03:45:12

Functions, Procedures and Packages,users want the same thing: reliable supplies of clean water. Rivers — and their entire catchments — therefore need to be actively managed in such a way as to balance the needs of the various users and to ensure that both the quantity and quality of the resource are maintained. For example, an import

柔美流畅 发表于 2025-3-25 09:43:20

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Triglyceride 发表于 2025-3-25 13:03:05

Entities, Architectures, and Processes,Standing waters exhibit great variety, ranging from small shallow temporary pools through ponds and lakes to enormous waters that may be over 20 000 km. in area and 500 m in depth (Figures 1.3, 1.5, 7.1–7.6).

胎儿 发表于 2025-3-25 18:11:21

Decision Theory and Real Decisions:The general conclusion from recent species conservation reviews is that protection given to most native aquatic species and their habitats in the majority of countries is inadequate in terms both of the establishment of appropriate reserves and of legislation.

宽宏大量 发表于 2025-3-25 21:10:41

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miscreant 发表于 2025-3-26 00:44:35

Species conservation,The general conclusion from recent species conservation reviews is that protection given to most native aquatic species and their habitats in the majority of countries is inadequate in terms both of the establishment of appropriate reserves and of legislation.

LINES 发表于 2025-3-26 08:16:22

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carbohydrate 发表于 2025-3-26 12:04:39

Paul Withington II,Larry W. Fullerton become more and more important to humans. Further, extended leisure time in modern societies has increased pressure on recreational facilities for aquatic activities like angling, wildfowling, sailing, swimming, water skiing and power-boating.

palliative-care 发表于 2025-3-26 14:59:14

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cacophony 发表于 2025-3-26 20:34:04

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查看完整版本: Titlebook: Conservation Management of Freshwater Habitats; Lakes, rivers and we P. S. Maitland,N. C. Morgan Book 1997 Chapman & Hall 1997 Wildlife.con