By Carsten Hobohm
ISBN-10: 9400769121
ISBN-13: 9789400769120
The booklet is the 1st accomplished research of the macroecology and geobotany of endemic vascular vegetation with case-studies and analyses from various areas on the planet. Endemism is a pre-extinction phenomenon. Endemics are threatened with extinction. because of foreign nature conservation regulations and thanks to the conception of the general public the concept’s significance is expanding. Endemism may end up from varied organic and environmental methods. looking on the method conservation measures may be tailored. Endemic vascular plant taxa, within the environment in their species composition and plants forms are very important gains of landscapes and symptoms of the standard of pertaining to habitats. The e-book is a vital foundation for biologists, ecologists, geographers, planners and executives of nature reserves and nationwide parks, and other people typically attracted to nature conservation and biogeography of vascular plants.
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Extra resources for Endemism in Vascular Plants
Example text
Gaston 1996a; Mallet 1996). In practice, one can find counts of endemic species and subspecies or varieties for many regions in the world on the internet, in books and scientific journals. What we normally do not know is if these various numbers are comparable and if the taxa have been split into many, or lumped to fewer, species or subspecies. As an interim result we have to accept that comparing numbers of endemic taxa in different geographical regions might result in biased conclusions; the number of endemic subspecies in one geographical region may be comparable with the number of endemic species in another one.
If each offspring is subsequently crossed with E. woodii and the process is then repeated, after several generations, the female offspring will be close to a female of Encephalartos woodii. Genetic analysis of chloroplast DNA of F1 hybrids between E. woodii and E. natalensis showed that all chloroplasts are inherited from the female E. natalensis, indicating that multigenerational hybrid offspring would have E. natalensis chloroplasts and could never be pure E. woodii (Cafasso et al. 2001; Osborne 1986; Giddy 1984).
Three individuals are known to exist in the wild today giving this species the opportunity to avoid extinction. Loss and degradation of its sclerophyllous forest habitat is the main threat to the species (Baillie et al. 2004; Tirel and Veillon 2002). 26 Vanuatu Carpoxylon macrospermum occurs on the islands Aneityum, Tanna and Futuna of the Vanuatu Archipelago. Approximately 40 individuals exist in lowland rainforest and another 120 mature trees are cultivated around villages. Regeneration is moderate.
Endemism in Vascular Plants by Carsten Hobohm
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