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| Registros recuperados: 2.368 | |
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| Spoel, S. van der. |
| Biodiversity can be considered to be a human appreciation of the biological entity diversity. Diversity can be expressed numerically on the basis of taxa found, but it can also be expressed as the contribution of a specimen to the diversity, for which a formula is proposed. Diversity is the sum of the taxonomic or numerical diversity, and the ecological, genetical, historical, and phylogenetic diversity. Moreover, each group, or larger taxon, has its own characteristic diversity. These types of diversity are considered separately. One formula is tentatively proposed to calculate the overall diversity. Diversity in nature is variable, which is demonstrated in a diagram for comparison with societyinduced diversity changes. Diversity in the pelagic fluctuates... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Biodiversity; Diversity calculation; Ecology; Pelagic; Phylogeny. |
| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/504018 |
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| Sket, B.; Arntzen, J.W.. |
| A morphologically distinct cavernicolous salamander Proteus anguinus from southeastern Slovenia (Bela Krajina) is described as P. a. parkelj ssp. n. It differs from P. a. anguinus in a dark pigmentation, fully developed eyes, a skull with broader and shorter bones and fewer teeth, a voluminous jaw musculature that gives the head a bulky appearance, a proportionally longer trunk with a higher number of vertebrae, shorter extremities, and a shorter tail. Most of these traits are considered to be plesiomorphic character states. An allozyme analysis over 40 loci has shown the new dark pigmented taxon to be genetically similar to a white and troglomorphic neighbouring population from Stična (DNei = 0.23). Both populations in turn are genetically dissimilar to a... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Urodela; Proteus; Taxonomy; Morphology; Allozyme analysis; Ecology; Distribution. |
| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/503865 |
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| Registros recuperados: 2.368 | |
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