%0 Journal Article
%T Diversity and distribution of Odonata (Insecta) larvae along an altitudinal gradient in Coalcom¨¢n mountains, Michoac¨¢n, Mexico
%A G¨®mez-Anaya
%A Jos¨¦ Antonio
%A Novelo-Guti¨¦rrez
%A Rodolfo
%A Bruce Campbell
%A William
%J Revista de Biolog¨ªa Tropical
%D 2011
%I Universidad de Costa Rica
%X evaluating components of landscape diversity is essential for the implementation of efficient conservation strategies. we evaluated the diversity of odonata larval assemblages from the coalcom¨¢n mountains (cm), michoac¨¢n, mexico, and related it to local (site-level) habitat variables. larvae were collected from shores, riffles and pools in five streams, counted and identified to species, twice per season during 2005. the shannon diversity index (h¡¯), margalef¡¯s richness index (r), simpson¡¯s index as a dominance measure (d) and pielou¡¯s equitability (j) were used to describe the assemblages, and renyi¡¯s diversity profiles were used to order diversity. a bray-curtis similarity index (bc) was used to evaluate beta diversity. theoretical richness was estimated using non-parametric and parametric methods. a canonical correspondence analysis (cca) was applied to explore the relationships of species with site-level environmental variables. a total of 12 245 larvae from 75 species, 28 genera and 8 families were recorded. over all sites, the dominant species were erpetogomphus elaps, macrothemis pseudimitans and argia pulla. the number of species per locality ranged from 18 to 36, and a high number of species (76%) occurred with relative abundances lower than 1%. a differential distribution of species and abundance in streams, time and strata was observed. renyi¡¯s diversity profiles showed diversity was higher in spring and on shores. most bc similarity values were smaller than 25%, indicating a high turnover rate in the cm. the high turnover rate reflects a differential distribution of the species along the altitudinal gradient, supporting the hypothesis of mexico as a betadiverse country. according to the slope of clench¡¯s curve, a reliable list of species was gathered. the cm larval assemblage is currently the largest reported for mexico, and our results support previous proposals of the cm as a species-rich area for conservation. rev. biol. trop. 59 (4): 1559-1577. epub
%K dragonfly larvae
%K diversity
%K cca
%K michoac¨¢n
%K mexico.
%U http://www.scielo.sa.cr/scielo.php?script=sci_abstract&pid=S0034-77442011000400011&lng=en&nrm=iso&tlng=en