e-journal

Local population genetic structure of the montane caddisfly Drusus discolor is driven by overland dispersal and spatial scaling

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1. Streams and rivers represent a special and complex case of dendritic networks, where comparable stretches of river habitat are isolated from each other by river stretches with different abiotic conditions as well as the terrestrial matrix. The capacity of stream insects for ‘within-network’ (i.e. instream) and ‘out-of-network’ (i.e. lateral overland) dispersal varies dramatically, making them good models for studying how these different dispersal modes affect community or population structure, and how landscape structure affects dispersal.
2. In this study, we genotyped 1129 individuals of the montane caddisfly species Drusus discolor from
44 sampling sites for 20 microsatellite loci to assess local population structure and the importance of overland dispersal and gene flow in two central German highlands. Using species distribution models, we assessed whether suitability of the terrestrial habitat between streams influenced genetic structuring among sampling sites.
3. Our results generally indicate high levels of overland dispersal at small and medium distances and show that the surrounding landscapes or catchment boundaries do not drive population structure in the study species. The data further show a significant change in spatial autocorrelation at about 20 km distance in both regions, indicating that dispersal is distance-limited and reduced at distances above 20 km.

Keywords: dendritic network, landscape genetics, microsatellites, population structure, species distribution model

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Informasi Detail

Judul Seri

Freshwater Biology

No. Panggil

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Penerbit

Germany : John Wiley & Sons Ltd., 2014

Deskripsi Fisik

Freshwater Biology (2015) 60, 209–221

Bahasa

English

ISBN/ISSN

doi:10.1111/fwb.1248

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

(2015) 60, 209–221

Subjek

PERIKANAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia/Agus

Versi lain/terkait

Lampiran Berkas

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