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Title

Cryptic matters: overlooked species generate most butterfly beta-diversity

AuthorsVodă, Raluca ; Dapporto, Leonardo; Dincă, Vlad ; Vila, Roger
Issue DateApr-2015
PublisherJohn Wiley & Sons
CitationEcography 38(4): 405-409 (2015)
AbstractThe cryptic fraction of biodiversity is composed of morphologically similar species that are or have been overlooked by scientists. Although current research is increasingly documenting new cases, cryptic species are frequently ignored in large-scale studies and monitoring programs, either because they have not yet been discovered, or because of the practical difficulties involved in differentiating them. However, it is unknown if this could represent a bias extending beyond the number of missed species. By analyzing the butterfly fauna of the west Mediterranean (335 species), we defined cryptic species based on the current consensus of the scientific community, compared their properties to other congeneric species and investigated the consequences of their inclusion/exclusion in beta-diversity analyses. We show that, as defined, the cryptic fraction of butterfly diversity represents about 25% of the west Mediterranean fauna and is overwhelmingly composed by groups of species that are not sympatric. Our results show that co-occurrence among cryptic species is significantly lower than among congeneric non-cryptic species. Accordingly, albeit the frequency of cryptic species is homogenously distributed over the study area, their distribution pattern accounts for most beta-diversity turnover over sea (from 50 to 100%). Beta-diversity turnover, a direct measure of the frequency of species replacement from site to site, is recognized as a fundamental parameter in ecology and is widely used to detect biogeographic patterns. These findings represent a change of paradigm in showing that cryptic diversity comprises original qualitative aspects in addition to merely quantitative ones. This highlights the importance of differentiating cryptic species for various research fields and opens the door to the study of further potential particularities of cryptic diversity.
Publisher version (URL)http://dx.doi.org/10.1111/ecog.00762
URIhttp://hdl.handle.net/10261/150494
DOI10.1111/ecog.00762
ISSN0906-7590
E-ISSN1600-0587
Appears in Collections:(IBE) Artículos
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