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001-es BibID:	BIBFORM059303
Első szerző:	Árva Diána (hidrobiológus)
Cím:	Effects of habitat types and within lake environmental gradients on the diversity of chironomid assemblages / Diána Árva, András Specziár, Tibor Erős, Mónika Tóth
Dátum:	2015
ISSN:	0075-9511
Megjegyzések:	Understanding the distribution of biotic diversity across various spatial scales and environmental gra-dients is important from fundamental, practical and conservation biological aspects. We applied ahierarchical diversity partitioning framework to quantify the variability of sample level - and 1-diversity, and environment related 2-diversity of benthic chironomid assemblages within and amonga priori defined habitat types, and along the gradients of individual environmental factors in a large andshallow lake (Lake Balaton, Hungary). Taxon richness (both additive and multiplicative) and Shannonindex based diversity approaches yielded highly concordant results. The -diversity was much lower and 1-diversity higher than predicted by null model and both measures varied substantially among habitattypes and along most individual environmental gradients. The 2-diversity indicated a marked variabil-ity of taxon (identified at species to genus level) pool among habitat types and higher than predictedtaxon turnover along all examined environmental gradients. Moreover, the observed 2-diversity variedgreatly among individual environmental gradients. The difference between the expected and observed 2-diversity values suggests that taxon turnover was most influential (in decreasing order) along thealgae coverage gradient, the lake bed substratum gradient and the macrophyte coverage gradient amongothers. We argue that within-lake environmental heterogeneity and its effect on the taxon richness shouldreceive more attention in biodiversity assessment and conservation. Management could benefit from theidentification of within lake gradients along which taxonomic turnover maximizes.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Limnologica. - 53 (2015), p. 26-34. -
További szerzők:	Specziár András Erős Tibor Tóth Mónika (1983-)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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