cucumber
发表于 2025-3-21 18:39:10
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SPASM
发表于 2025-3-21 22:44:06
Introductione can proceed to the study of the more intractible problems of how they got there. However, to quote from MacArthur (1972), “To do science is to search for repeated patterns, not simply to accumulate facts.” The existence of repeated non-random patterns in species distributions implies the operation
scotoma
发表于 2025-3-22 01:47:29
Biogeographic patterns: a perceptual overviewthe aims, approaches and methods of biogeography. The need for such a discussion reflects the fact that biogeography lacks cohesion and consistency (Chapter 1). There is too little sound knowledge of biogeographical processes, reflected by disparity about what can be assumed or should be investigate
Indict
发表于 2025-3-22 04:54:27
Species diversityal variation in the richness of plant and animal species. A simple explanation eluded Wallace, Bates, Darwin, Humboldt and the other great naturalists of the last century. In the intervening hundred years, biogeographers, ecologists, and palaeontologists have identified many other spatial and tempor
fixed-joint
发表于 2025-3-22 09:27:32
Relationship of species number to area, distance and other variablese centre of distribution and the spread around the centre are different for each species, as can readily be seen in any atlas of distribution. The consequence of this is that, again in general, larger areas will contain more species than smaller areas. However, the species—area relationship is not s
Commemorate
发表于 2025-3-22 14:32:32
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完成
发表于 2025-3-22 18:46:56
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碎片
发表于 2025-3-22 22:18:26
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Bridle
发表于 2025-3-23 01:24:58
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CRUE
发表于 2025-3-23 09:32:19
Extinctionecies that have existed on Earth most are now extinct, and about 250 000 extinctions are known from the fossil record (Raup and Sepkoski, 1984; Raup, 1986). Among fossilizable marine organisms about 72% of the families (2 400 of 3 300) and 78% of the genera (9 250 of 11 800) are known to be extinct