Nutrient availability affected shallow-lake ecosystem response along the Late-Glacial/Holocene transition
| العنوان: | Nutrient availability affected shallow-lake ecosystem response along the Late-Glacial/Holocene transition |
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| المؤلفون: | Petra Houfková, Anna Tichá, Vlasta Jankovská, Daniel Vondrák, Tomáš Bešta |
| المصدر: | Hydrobiologia. 846:87-108 |
| بيانات النشر: | Springer Science and Business Media LLC, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, biology, Ecology, 010604 marine biology & hydrobiology, fungi, Aquatic Science, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Nutrient, Diatom, Environmental science, Sedimentary rock, Glacial period, Eutrophication, Relative species abundance, Holocene, Trophic level |
| الوصف: | Shallow lowland lakes undergo long-lasting natural eutrophication processes, which can be studied through the development of communities of aquatic organisms. However, records showing millennial-scale trophic status variability in these water bodies are rare. Two radiocarbon-dated sedimentary profiles from former (now destroyed by brown coal mining) Lake Komořany (Central Europe, Czech Republic) served for a multi-proxy study of biological remains (diatoms, chironomids, pollen) supplemented by X-ray fluorescence (XRF) and loss-on-ignition (LOI). The age–depth model and palynostratigraphy confirm a continuous Late-Glacial to Early-Holocene record. The results suggest consistent in-lake conditions with high nutrient availability since the lake origin in the Late-Glacial period. A distinct shift at the Late-Glacial/Holocene boundary evidenced by an enhancement in diatom valve concentration and a lithological interface was foregone by a qualitative change in diatom and chironomid assemblages along with rise in LOI. It suggests that a major transformation occurred before the onset of the Holocene. As this qualitative change was characterized by a decrease in relative abundance of nutrient-demanding species, we propose an indirect climatic control by means of nutrient availability as the main driver of the aquatic species composition. |
| تدمد: | 1573-5117 0018-8158 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::a4fefab15e83ee23219541200bb394d1 https://doi.org/10.1007/s10750-019-04054-7 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........a4fefab15e83ee23219541200bb394d1 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15735117 00188158 |
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