Piotr Kittel , Olga Antczak-Orlewska , Karina Apolinarska , Daniel Okupny , Mirosław Makohonienko , Marta Rudna , Joanna Rennwanz , Robert Sobczyk , Aleksandra Leszczyk , Mateusz Płóciennik , Dmitry Tsvirko , Bartosz Kotrys , Tomasz Goslar , Jerzy Sikora
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引用次数: 0
Abstract
Local lithology has a strong influence on lake biocenoses, including macrophytes and invertebrate communities. Calcium carbonate (CaCO3) content may drive ecosystem components from plankton (Cladocera), through various trophic groups of macrobenthos (Chironomidae) to molluscs settled on plants and bottom of the littoral zone. This study reconstructs the impact of carbonates on the biota in a small palaeolake during the Late Weichselian and Holocene in the recently glaciated area in Northern Poland. The main litho-geochemical component of the studied lacustrine deposits is calcium carbonate (CaCO3), ranging from 0 to 98.7 % of the sediment content. The variability of the CaCO3 content reflects changes in hydrological and geomorphological conditions within the palaeolake catchment area. The multi-proxy analyses enabled the reconstruction of a complex environmental history of the studied kettle hole lake. Oligo-/mesotrophic conditions with charophyte meadows during the Late Weichselian supported diverse chironomid communities. Cladocera became more abundant in the Early Holocene, reflecting hydroclimatic changes. The transition into macrophytic meso-/eutrophic conditions in the lake was reflected in the SiO2bio and TOC increase. This phase ended with a period of the highest CaCO3 concentration in the lake’s history, which supported mollusc assemblages. The final terrestrialisation followed the maximum decalcification in the catchment. Some Chironomidae appeared to be tolerant to relatively high carbonate concentrations, but this group feeds mainly on the bottom FPOM and most of the taxa declined when CaCO3 exceeded 70 %. The mollusc abundance and richness were correlated with the carbonate content in the lake. Hardwater lakes defy simple interpretation in palaeolimnology. The classification of invertebrates according to their tolerance for carbonate content presented here helps in reconstructing palaeocenoses reaction to litho-chemical changes in lake basins.
期刊介绍:
Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment.
Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.