首页|Assessments of extinction risk for bryophytes from Madagascar and Indian Ocean islands
Assessments of extinction risk for bryophytes from Madagascar and Indian Ocean islands
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NSTL
Gebruder Borntraeger
In this paper, assessments of extinction risk for 41 species of bryophytes found on Madagascar and/or adjacent islands of the western Indian Ocean are presented, which are taken from assessments of a sample of 1500 bryophyte species selected at random from around the world. This is itself a contribution towards the IUCN Red List and the Red List Index, which measures trends in extinction risk of biodiversity and is one of the headline indicators of the UN Convention on Biological Diversity. Assessments of the selected species followed the IUCN Red List Categories and Criteria and represent a significant further step in the evaluation of threatened Indian Ocean bryophytes. There are 35 species endemic to one or other Indian Ocean island, while six are shared with the African continent. Of these 41 species, all but one species is listed here as being either threatened with extinction (classified as Vulnerable, Endangered or Critically Endangered) or Near Threatened under IUCN Red List criteria. From this we estimate that more than one third (>37%) of Indian Ocean bryophytes overall and more than half (>54%) of bryophytes found in Madagascar are threatened with extinction, after accounting for additional widespread species in the sample that are considered to be of Least Concern. The principal threat is overwhelmingly from relentless, small-scale deforestation and conversion of natural habitats for subsistence agriculture, and a large majority of the threatened bryophytes assessed in this paper are localised endemics often known from historical collections in single or very few locations.
bryophytesIndian Ocean islandsIUCN Red ListMadagascarthreatened speciesRED LISTGLOBAL BIODIVERSITYCONSERVATIONFLORAPROGRESSFORESTSDEFORESTATIONVEGETATIONINDICATORSREVISION
Araujo, Ana Claudia、Signorino, Giuseppe、Brummitt, Neil
NSTL
Gebruder Borntraeger
