气候变化领域集成服务门户(CCPortal): Investigating the impact of anthropogenic land use on a hemiboreal lake ecosystem using carbon/nitrogen ratios and coupled-optical emission spectroscopy

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DOI	10.1016/j.palaeo.2019.01.007
	Investigating the impact of anthropogenic land use on a hemiboreal lake ecosystem using carbon/nitrogen ratios and coupled-optical emission spectroscopy
	Stivrins N.; Liiv M.; Brown A.; Banerjea R.Y.; Heinsalu A.; Veski S.
发表日期	2019
ISSN	0031-0182
起始页码	1
结束页码	9
卷号	518
英文摘要	Anthropogenic impacts on lake ecosystems have increased substantially towards the present. However, the strength and timing in most cases are not evaluated in detail, missing valuable information on the response and recovery of an aquatic system. In this study, we use the sediment total organic carbon/total nitrogen ratio (C/N) and inductively coupled-optical emission spectroscopy (ICP-OES) elements and the available information about the biological processes to explore anthropogenic land use impact on the lake ecosystem. As a case study we selected a hemiboreal lake Trikātas (Latvia, NE Europe). The Pearson correlation was used to statistically test the correlations of all variables. Our results show that the C/N ratio lowered immediately with the onset of crop cultivation at 500 BCE. Extensive forest clearance and an abrupt increase in land use are reflected through the associated chemical elements from ICP-OES and the increasing presence of herbivore dung spores since 1200 CE. These changes concur with the excess of fish remains suggesting a decrease in fish populations. Interestingly, anthropogenic land use driven erosion and accompanied calcium carbonate (CaCO 3 ) matter influx favoured the abundance of Chara spp. in Lake Trikātas since 500 CE, which currently forms the protected specific habitat-type (H3140) of the European Union. At present, specific submerged macrophyte Chara habitat-type diminished almost entirely due to increased nutrient input, phytoplankton blooming, hypertrophic conditions and reduced light availability. The continued land use practices led to a switch in organic matter source in the lake from macrophytes to solely algal origin. The current study underlines the need of additional methods used to detect the sensitivity of lake ecosystem to external disturbances such as minor anthropogenic land use that might not necessarily be apparent in more traditional analyses such as palynology. © 2019 Elsevier B.V.
英文关键词	Chara; Environmental change; EU H3140; Non-pollen palynomorphs; Paleolimnology; Soil erosion
语种	英语
scopus关键词	abundance; anthropogenic effect; environmental change; habitat type; lake ecosystem; land use change; macrophyte; organic matter; paleolimnology; phytoplankton; soil erosion; spectroscopy; total organic carbon; Europe; Lake Trikatas; Latvia; algae; Chara
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151074
作者单位	Department of Geography, Faculty of Geography and Earth Sciences, University of Latvia, Jelgavas street 1, Riga, LV-1004, Latvia; Department of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia; Lake and Peatland Research Centre, Purvisi, Puikule, Alojas District, Latvia; Department of Archaeology, University of Reading, Whiteknights, PO Box 227, Reading, RG6 6AB, United Kingdom; Wessex Archaeology, Portway House, Old Sarum Park, Salisbury, SP4 6ED, United Kingdom
推荐引用方式 GB/T 7714	Stivrins N.,Liiv M.,Brown A.,et al. Investigating the impact of anthropogenic land use on a hemiboreal lake ecosystem using carbon/nitrogen ratios and coupled-optical emission spectroscopy[J],2019,518.
APA	Stivrins N.,Liiv M.,Brown A.,Banerjea R.Y.,Heinsalu A.,&Veski S..(2019).Investigating the impact of anthropogenic land use on a hemiboreal lake ecosystem using carbon/nitrogen ratios and coupled-optical emission spectroscopy.Palaeogeography, Palaeoclimatology, Palaeoecology,518.
MLA	Stivrins N.,et al."Investigating the impact of anthropogenic land use on a hemiboreal lake ecosystem using carbon/nitrogen ratios and coupled-optical emission spectroscopy".Palaeogeography, Palaeoclimatology, Palaeoecology 518(2019).