气候变化领域集成服务门户(CCPortal): Reviews and syntheses: How do abiotic and biotic processes respond to climatic variations in the Nam Co catchment (Tibetan Plateau)?

CCPortal

DOI	10.5194/bg-17-1261-2020
	Reviews and syntheses: How do abiotic and biotic processes respond to climatic variations in the Nam Co catchment (Tibetan Plateau)?
	Anslan, Sten; Rad, Mina Azizi; Buckel, Johannes; Galindo, Paula Echeverria; Kai, Jinlei; Kang, Wengang; Keys, Laura; Maurischat, Philipp; Nieberding, Felix; Reinosch, Eike; Tang, Handuo; Tuong Vi Tran; Wang, Yuyang; Schwalb, Antje
通讯作者	Nieberding, F (通讯作者)
发表日期	2020
ISSN	1726-4170
EISSN	1726-4189
起始页码	1261
结束页码	1279
卷号	17 期号:5
英文摘要	The Tibetan Plateau (TP) is the largest alpine plateau on Earth and plays an important role in global climate dynamics. On the TP, climate change is happening particularly fast, with an increase in air temperature twice the global average. The particular sensitivity of this high mountain environment allows observation and tracking of abiotic and biotic feedback mechanisms. Closed lake systems, such as Nam Co on the central TP, represent important natural laboratories for tracking past and recent climatic changes, as well as geo-biological processes and interactions within their respective catchments. This review gives an interdisciplinary overview of past and modern environmental changes using Nam Co as a case study. In the catchment area, ongoing rise in air temperature forces glaciers to melt, contributing to a rise in lake level and changes in water chemistry. Some studies base their conclusions on inconsistent glacier inventories, but an ever-increasing deglaciation and thus higher water availability have persisted over the last few decades. Increasing water availability causes translocation of sediments, nutrients and dissolved organic matter to the lake, as well as higher carbon emissions to the atmosphere. The intensity of grazing has an additional and significant effect on CO2 fluxes, with moderate grazing enhancing belowground allocation of carbon while adversely affecting the C sink potential through reduction of above-surface and subsurface biomass at higher grazing intensities. Furthermore, increasing pressure from human activities and livestock grazing are enhancing grassland degradation processes, thus shaping biodiversity patterns in the lake and catchment. The environmental signal provided by taxon-specific analysis (e.g., diatoms and ostra-cods) in Nam Co revealed profound climatic fluctuations between warmer-cooler and wetter-drier periods since the late Pleistocene and an increasing input of freshwater and nutrients from the catchment in recent years. Based on the reviewed literature, we outline perspectives to further understand the effects of global warming on geodiversity and biodiversity and their interplay at Nam Co, which acts as a case study for potentially TP-level or even worldwide processes that are currently shaping high mountain areas.
关键词	WESTERN NYAINGENTANGLHA MOUNTAINS KOBRESIA-PYGMAEA ECOSYSTEM DISSOLVED ORGANIC-MATTER ALPINE MEADOW LAKE LEVEL NYAINQENTANGLHA RANGE PLANT-COMMUNITIES GENETIC DIVERSITY SOIL PROPERTIES WATER
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:000518835100003
来源期刊	BIOGEOSCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260071
推荐引用方式 GB/T 7714	Anslan, Sten,Rad, Mina Azizi,Buckel, Johannes,et al. Reviews and syntheses: How do abiotic and biotic processes respond to climatic variations in the Nam Co catchment (Tibetan Plateau)?[J]. 中国科学院青藏高原研究所,2020,17(5).
APA	Anslan, Sten.,Rad, Mina Azizi.,Buckel, Johannes.,Galindo, Paula Echeverria.,Kai, Jinlei.,...&Schwalb, Antje.(2020).Reviews and syntheses: How do abiotic and biotic processes respond to climatic variations in the Nam Co catchment (Tibetan Plateau)?.BIOGEOSCIENCES,17(5).
MLA	Anslan, Sten,et al."Reviews and syntheses: How do abiotic and biotic processes respond to climatic variations in the Nam Co catchment (Tibetan Plateau)?".BIOGEOSCIENCES 17.5(2020).