干旱区生态环境知识资源中心(Arid): Carbon Uptake in Surface Water Food Webs Fed by Palaeogroundwater

Arid

DOI	10.1029/2018JG004925
	Carbon Uptake in Surface Water Food Webs Fed by Palaeogroundwater
	Mazumder, Debashish 1; Saintilan, Neil 2; Hollins, Suzanne 1; Meredith, Karina 1; Jacobsen, Geraldine 1; Kobayashi, Tsuyoshi 3; Wen, Li 3
通讯作者	Mazumder, Debashish
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2019
卷号	124 期号:5 页码:1171-1180
英文摘要	The use of C-14 to elucidate sources of carbon within freshwater aquatic ecosystems is challenging the assumption that modern autochthonous carbon dominates energy flows. We measured the uptake of old carbon through several trophic levels of a wetland fed by groundwater of the Great Artesian Basin, Australia, the largest artesian basin in the world. Stable isotopes (delta C-13 and delta N-15) and radiocarbon (C-14) were used to quantify food chain links and connection between groundwater and surface water food webs. Our results suggest that old groundwater was the dominant carbon source even at the highest trophic levels, with predatory fish returning apparent carbon ages of up to 11ka. Stable isotope analysis (delta C-13 and delta N-15) identified trophic links between fish, aquatic insects, and algae with smaller contributions from particulate organic matter to the food webs. As natural mound springs and associated wetlands are the only source of reliable water during dry periods over vast areas of the western Great Artesian Basin, the result has potential implications for the interpretation of archaeological artifacts associated with indigenous passage within the interior. Plain Language Summary The Great Artesian Basin, the largest and deepest artesian basin in the world, contains water up to millions of years old, and this water discharges to create small wetlands in the dry interior of Australia. We examined the source and transfer of carbon within an ecosystem fed by groundwater from the Great Artesian Basin, using stable and radioactive isotopes. In the first demonstration of groundwater contribution to ecosystem carbon in semiarid or arid regions, we found very old carbon to be the dominant carbon source to all levels of the food chain, including fish, which returned ages of up to 11,000years old. Our results have implications for the dating of artifacts from interior Australia, where these wetlands were utilized by aboriginal peoples for millennia.
英文关键词	old carbon food web groundwater surface water Great Artesian Basin
类型	Article
语种	英语
国家	Australia
收录类别	SCI-E
WOS记录号	WOS:000477719600009
WOS关键词	GREAT ARTESIAN BASIN ; ORGANIC-MATTER ; ANCIENT CARBON ; GLACIER ; GEOCHEMISTRY ; BIOLABILITY ; RECHARGE ; STORAGE ; SYSTEM ; VALUES
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217087
作者单位	1.Australian Nucl Sci & Technol Org, Kirrawee, NSW, Australia; 2.Macquarie Univ, Dept Environm Sci, Sydney, NSW, Australia; 3.NSW Off Environm & Heritage, Sci Div, Sydney South, NSW, Australia
推荐引用方式 GB/T 7714	Mazumder, Debashish,Saintilan, Neil,Hollins, Suzanne,et al. Carbon Uptake in Surface Water Food Webs Fed by Palaeogroundwater[J],2019,124(5):1171-1180.
APA	Mazumder, Debashish.,Saintilan, Neil.,Hollins, Suzanne.,Meredith, Karina.,Jacobsen, Geraldine.,...&Wen, Li.(2019).Carbon Uptake in Surface Water Food Webs Fed by Palaeogroundwater.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(5),1171-1180.
MLA	Mazumder, Debashish,et al."Carbon Uptake in Surface Water Food Webs Fed by Palaeogroundwater".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.5(2019):1171-1180.