Postglacial succession of caddisfly (Trichoptera) assemblages in a central European montane lake
| Autor: | Daniel Vondrák, Niina Kuosmanen, Nick Schafstall, Richard C. Chiverrell, Jennifer L. Clear, Jolana Tátosová, Pavel Chvojka |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Subfossil biology Ecology Fauna Cell Biology Plant Science Ecological succession STREAMS biology.organism_classification 01 natural sciences Biochemistry 03 medical and health sciences 030104 developmental biology Caddisfly Genetics Period (geology) Animal Science and Zoology Glacial period Molecular Biology Ecology Evolution Behavior and Systematics Geology Holocene 010606 plant biology & botany |
| Zdroj: | Biologia |
| ISSN: | 1336-9563 0006-3088 |
| Popis: | © 2019, Institute of Zoology, Slovak Academy of Sciences. The Bohemian Forest lakes, situated along the Czech-German-Austrian border, were strongly affected by atmospheric acidification between the 1950s and the late 1980s. The subsequent chemical recovery of the lake water should precede and enable a biological recovery, including changes in caddisfly (Insecta: Trichoptera) assemblages. Nevertheless, local pre-acidification data and detailed knowledge of the lake district history are missing, making evaluation of lake recovery difficult. We performed high-resolution analysis of caddisfly remains in a 2.2 m long sediment profile from Prášilské Lake covering the complete history of the lake-catchment evolution. Caddisfly larvae are good indicators of environmental conditions and their subfossil remains are well preserved in unconsolidated waterlaid sediments. A total of 10 caddisfly morpho-taxa were found providing a record from 11,400 cal. yr. BP to the present. With the exception of Athripsodes aterrimus, all identified species are currently present in the Bohemian Forest glacial lakes or their inflow streams but not all of them are documented in Prášilské Lake. The caddisfly fauna consisted of acid-resistant, acid-tolerant and eurytopic species since the Early Holocene. Based on our results, the acid, dystrophic state of Prášilské Lake has been occurring since the lake formation. We conclude that the first signs of natural acidification appeared not later than during the Holocene onset in the Bohemian Forest region. Furthermore, we did not detect any abrupt changes in the species composition connected to the period of anthropogenic acidification during the twentieth century. This study provides for the first time a record of postglacial succession of caddisfly assemblages in a central European mountain lake. |
| Databáze: | OpenAIRE |
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