DOI: 10.1007/s10584-017-2074-1
Scopus记录号: 2-s2.0-85029471808
论文题名: 14,000 years of climate-induced changes in carbon resources sustaining benthic consumers in a small boreal lake (Lake Tollari, Estonia)
作者: Simon B. ; Anneli P. ; Christian H. ; Ilmar T.
刊名: Climatic Change
ISSN: 0165-0009
EISSN: 1573-1480
出版年: 2017
卷: 145, 期: 2018-01-02 起始页码: 205
结束页码: 219
语种: 英语
英文关键词: Carbon stable isotope
; Climate change
; Human impact
; Paleolimnology
; Subfossil chironomid
Scopus关键词: Biogeochemistry
; Biological materials
; Biomass
; Catchments
; Climatology
; Deforestation
; Ecology
; Ecosystems
; Global warming
; Isotopes
; Lakes
; Organic carbon
; Organic compounds
; Paleolimnology
; Agricultural practices
; Carbon stable isotopes
; Climate variability
; Holocene thermal maximums
; Human impact
; Mean air temperatures
; Organic matter inputs
; Subfossil chironomid
; Climate change
; Allerod
; anthropogenic effect
; benthos
; bioclimatology
; biomass
; Bolling
; Boreal
; carbon isotope
; catchment
; climate variation
; fly
; food web
; Holocene
; Hypsithermal
; lake ecosystem
; organic carbon
; organic matter
; paleoclimate
; paleolimnology
; stable isotope
; subfossil
; temperature effect
; Estonia
; Chironomidae
英文摘要: In order to forecast the influence of future climate change on lake ecosystems, the paleolimnological approaches are needed to understand the impact of past climate variability. We reconstruct temporal changes in carbon resources sustaining chironomid biomass over the last 14,000 years, by means of carbon stable isotope analysis of subfossil chironomids (δ13CHC), with the aim of identifying the response of carbon processing in the benthic food web to climate change. We find a negative linear correlation between reconstructed summer mean air temperature and δ13CHC values, revealing that (i) the contribution of allochthonous organic carbon to the chironomid biomass is high during the coldest and low-productive period, (ii) the aquatic organic matter is the main carbon source during intermediate climate conditions, and (iii) a significant part of the chironomid biomass is sustained by methane-derived carbon during the Holocene Thermal Maximum and the Bølling-Allerød. This study confirms that climate change may significantly affect the recycling process of organic carbon in the benthic food web of small lakes. However, deforestation and agricultural practices within the catchment area induced important organic matter inputs into the lake sediments, which seem to disrupt the observed relationship between climate variability and carbon processing in the benthic food web. In this context, complementary studies are needed to better understand the combined effects of the ongoing global warming and human activities on the lake carbon cycling. © 2017, Springer Science+Business Media B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83876
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Center for Limnology, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartumaa, Estonia; Institute of Geology, Tallinn University of Technology, Tallinn, Estonia; UMR INRA 1137, Ecologie et Ecophysiologie Forestière, PTEF081, Université de Lorraine, Champenoux, France
Recommended Citation:
Simon B.,Anneli P.,Christian H.,et al. 14,000 years of climate-induced changes in carbon resources sustaining benthic consumers in a small boreal lake (Lake Tollari, Estonia)[J]. Climatic Change,2017-01-01,145(2018-01-02)