Journal ArticleDOI
Insular Biogeography in Continental Regions. I. The Northern Andes of South America
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In order to test whether the theory of insular biogeography also applies to a continental situation, species diversity and endemism were studied among the birds living in islands of paramo vegetation above timberline in the northern Andes of South America.Abstract:
In order to test whether the theory of insular biogeography also applies to a continental situation, species diversity and endemism were studied among the birds living in islands of paramo vegetation above timberline in the northern Andes of South America Stepwise regression analyses were performed, assuming that measures of environmental diversity (especially area) and of isolation (interisland distances) permit prediction of species numbers and numbers of endemics in a continental situation, as they do in archipelagos With seven independent variables included in the equations, prediction of species diversity and endemism was extremely good From 92% to 97% of the variance in species numbers can be accounted for by regression, the best fit (97%) being obtained with a linear model From 87% to 93% of the variance in number of endemics can be predicted by regression, a semilog model providing the best fit (93 % ) The Andean islands conform to archipelagos in two ways: first, because the species-area curread more
Citations
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Turnover Rates in Insular Biogeography: Effect of Immigration on Extinction
TL;DR: This new model predicts that when immigration rates are high relative to extinction rates, turnover rate is directly related to the distance between an island and the source of colonizing species.
Journal ArticleDOI
The statistics and biology of the species-area relationship
Edward F. Connor,Earl D. McCoy +1 more
TL;DR: It is proposed that the exponential and power function models of the species-area relationship result from the way in which individuals are distributed among species, and specific values of the slope of the power function are often construed to * Order of authorship determined by the toss of a coin.
Journal ArticleDOI
The distance decay of similarity in biogeography and ecology
Jeffrey C. Nekola,Peter S. White +1 more
TL;DR: In this article, the authors investigated how similarity changes with distance in biological communities, and explored whether growth form, dispersal type, rarity, or support affected the rate of distance decay in similarity.
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The island dilemma: lessons of modern biogeographic studies for the design of natural reserves
TL;DR: The main conclusions are as follows: the number of species that a reserve can hold at equilibrium is a function of its area and its isolation, and larger reserves, and reserves located close to other reserves, can hold more species.
References
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Journal ArticleDOI
An equilibrium theory of insular zoogeography
TL;DR: As the area of sampling A increases in a ecologically uniform area, the number of plant and animal species s increases in an approximately logarithmic manner, or s = bAk, (1) where k < 1, as shown most recently in in the detailed analysis of Preston (1962).
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Ecological Parameters and Plant Species Diversity
TL;DR: The regulation of plant species diversity was studied for 14 islands, four island groups, and 10 coastal mainland areas of California and Baja California using several kinds of models to suggest area is the best single predictor of species diversity.
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Species Abundance: Natural Regulation of Insular Variation
TL;DR: The variation in number of species on large islands can be predicted more accurately than the variation on small ones, and multiple linear regression gives better "goodness of fit" than curvilinear analysis.