Das Zoologische Forschungsmuseum Alexander Koenig

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Ecological specialisation is associated with genetic structure in the ant-associated butterfly family Lycaenidae

Erscheinungsjahr: 
2018
Vollständiger Titel: 
Ecological specialisation is associated with genetic structure in the ant-associated butterfly family Lycaenidae
Autor/-innen des ZFMK: 
Org. Einordnung: 
Publiziert in: 
Proceedings of the Royal Society B: Biological Sciences
Publikationstyp: 
Zeitschriftenaufsatz
DOI Name: 
10.1098/rspb.2018.1158
Keywords: 
ecological islands, myrmecophily, DNA barcoding, haplotype diversity, divergence, isolation by distance
Bibliographische Angaben: 
Schär, S., Eastwood, R., Arnaldi, K., Talavera, G., Kaliszewska, Z., Boyle, J., Espeland, M., Nash, D., Vila, R., Pierce, N. (2018): Ecological specialisation is associated with genetic structure in the ant-associated butterfly family Lycaenidae. Proceedings of the Royal Society B 285 (1886): 20181158
Abstract: 

The role of specialization in diversification can be explored along two geologi- cal axes in the butterfly family Lycaenidae. In addition to variation in host- plant specialization normally exhibited by butterflies, the caterpillars of most Lycaenidae have symbioses with ants ranging from no interactions through to obligate and specific associations, increasing niche dimensionality in ant-associated taxa. Based on mitochondrial sequences from 8282 specimens from 967 species and 249 genera, we show that the degree of ecological specialization of lycaenid species is positively correlated with genetic divergence, haplotype diversity and an increase in isolation by distance. Nucleotide substitution rate is higher in carnivorous than phytophagous lycaenids. The effects documented here for both micro- and macroevolution- ary processes could result from increased spatial segregation as a consequence of reduced connectivity in specialists, niche-based divergence or a combination of both. They could also provide an explanation for the extraordinary diversity of the Lycaenidae and, more generally, for diversity in groups of organisms with similar multi-dimensional ecological specialization.