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- Title
Volcanic caves: priorities for conserving the Azorean endemic troglobiont species.
- Authors
Borges, Paulo A. V.; Cardoso, Pedro; Amorim, Isabel R.; Pereira, Fernando; Constância, João P.; Nunes, João C.; Barcelos, Paulo; Costa, Paulino; Gabriel, Rosalina; de Lurdes Dapkevicius, Maria
- Abstract
Azorean lava-tubes and volcanic pits adequately sampled for arthropod fauna were evaluated for species diversity and rarity. An iterative partial multiple regression analysis was performed to produce a multi-criteria index (Importance Value for Cave Conservation, IV-CC) incorporating arthropod species diversity indices but also including indices qualifying cave geological and management features (e.g., the diversity of geological structures, threats, accessibility). Additionally, we calculated complementarity solutions (irreplaceability and Fraction-of-Spare measures) for each cave with different targets per species, i.e., the minimum number of caves needed for each species to be represented either once or twice. Our results clearly show that to preserve all troglobiont arthropods endemic to the Azores, it is crucial to protect several caves per island. As many as 10 and 15 caves are needed to include one or two occurrences, respectively, per species.
- Subjects
VOLCANOES; CAVE ecology; ARTHROPODA; BIOSPELEOLOGY; MULTIPLE regression analysis; STRUCTURAL geology; CONSERVATION biology
- Publication
International Journal of Speleology, 2012, Vol 41, Issue 1, p101
- ISSN
0392-6672
- Publication type
Article
- DOI
10.5038/1827-806X.41.1.11