气候变化领域集成服务门户(CCPortal): Chitinous aquatic invertebrate assemblages in Quaternary lake sediments as indicators of past deepwater oxygen concentration

CCPortal

DOI	10.1016/j.quascirev.2020.106203
	Chitinous aquatic invertebrate assemblages in Quaternary lake sediments as indicators of past deepwater oxygen concentration
	Ursenbacher S.; Stötter T.; Heiri O.
发表日期	2020
ISSN	0277-3791
卷号	231
英文摘要	Chitinous aquatic invertebrate remains are abundant in late Quaternary lake sediment sequences. However, for standard analysis of invertebrate indicator groups usually only the remains of one particular invertebrate group (e.g. water fleas, midges) are systematically isolated from the sediments and analysed numerically. In a calibration study focusing on surface sediment samples from 36 small Swiss lakes, we show that the abundances of other chitinous aquatic invertebrate remains in samples prepared for chironomid analysis provide important information on in-lake oxygen conditions when assessed relative to and together with the overall number of chironomid remains. Our results show that particularly high abundances of chironomid and chaoborid remains are indicative for lakes with high and low deepwater oxygen concentrations, respectively, but that also the remains of other invertebrate groups such as Ceriodaphnia ephippia and Plumatella statoblasts tend to be more abundant in warm, stably stratified and anoxic lakes. Direct gradient analyses of the isolated invertebrate assemblages indicate that deepwater oxygen concentration during late summer is the strongest predictor for assemblage changes in our dataset, followed by variables representing temperature conditions (summer surface water temperature, altitude), summer stratification stability (temperature difference between surface and deepwater layers), water depth and the relative volume of the late summer hypoxic water layer. We show, based on invertebrate assemblages in a Lateglacial sediment sequence from Rotsee, Switzerland, that our new calibration data can provide information on past changes in deepwater oxygen availability from late Quaternary lake sediment sequences, when fossil invertebrate assemblages are added as passive samples to ordinations of the surface sediment calibration data. This provides a new approach for developing assessments of past changes in deepwater oxygen concentrations from late Quaternary sediment samples prepared for chironomid analysis. Such assessments can provide important supplementary information for e.g. interpreting palaeotemperature reconstructions based on chironomid remains. © 2020 Elsevier Ltd
英文关键词	Aquatic invertebrates; Bryozoans; Chaoborus; Chironomids; Cladocerans; Europe; Micropaleontology; Others; Oxygen; Paleolimnology; Quaternary
语种	英语
scopus关键词	Anoxic water; Calibration; Oxygen; Paleolimnology; Surficial sediments; Aquatic invertebrates; Bryozoans; Chaoborus; Chironomids; Cladocerans; Europe; Micropaleontology; Others; Quaternary; Lakes; abundance; aquatic organism; concentration (composition); deep water; fossil assemblage; invertebrate; lacustrine deposit; oxygen; paleotemperature; reconstruction; surficial sediment; Lucerne [Switzerland]; Rotsee; Switzerland; Bryozoa; Ceriodaphnia; Chaoboridae; Chaoborus; Chironomidae; Cladocera; Invertebrata; Plumatella
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151566
作者单位	Institute for Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, Bern, CH-3013, Switzerland; Geoecology, Department of Environmental Sciences, University of Basel, Klingelbergstrasse 27, Basel, CH-4056, Switzerland
推荐引用方式 GB/T 7714	Ursenbacher S.,Stötter T.,Heiri O.. Chitinous aquatic invertebrate assemblages in Quaternary lake sediments as indicators of past deepwater oxygen concentration[J],2020,231.
APA	Ursenbacher S.,Stötter T.,&Heiri O..(2020).Chitinous aquatic invertebrate assemblages in Quaternary lake sediments as indicators of past deepwater oxygen concentration.Quaternary Science Reviews,231.
MLA	Ursenbacher S.,et al."Chitinous aquatic invertebrate assemblages in Quaternary lake sediments as indicators of past deepwater oxygen concentration".Quaternary Science Reviews 231(2020).