| Autor: |
Gutowski, Antje, Foerster, Julia, Doege, Angela, Paul, Markus |
| Zdroj: |
Algological Studies; November 2015, Vol. 148 Issue: 1 p33-56, 24p |
| Abstrakt: |
We analyzed the records of several species ofChamaesiphonA. Braun ex Grunow 1865 collected by the water management authorities of the German federal states North RhineWestphalia (NRW) and Saxony (SN). In total, 579 sampling events from 429 different sampling sites at soft water streams and rivers of the Central German Uplands (types 5, 5.1 and 9 of the German typology for running waters) were included. Samples were collected between 2006 and 2012. Sites ranged from unimpaired, nutrient-poor to nutrient-rich sites. Twelve different species ofChamaesiphonwere recorded. The epiphytic speciesC. confervicolusandC. incrustansand the epilithic speciesC. fuscus,C. polymorphusandC. starmachiiwere most common in both federal states. Uni- and multivariate methods were employed to describe autecological preferences of these taxa.C. fuscusandC. starmachiioccur at significantly lower nutrient levels and therefore are characteristic for unimpaired sites, whereasC. confervicolus,C. incrustansandC. polymorphusprefer nutrient-rich sites.C. confervicolusandC. incrustansare different in respect of the morphological features of the sampling sites like stream width, depth and substrate.C. polonicuswhich occurs in the medium range regarding nutrients and geochemical properties is known to be a tolerant species. The use ofChamaesiphonspecies for assessment and especially their classification within the PHYLIB tool is discussed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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