干旱区生态环境知识资源中心(Arid): Getting to the Root of Organic Inputs in Groundwaters: Stygofaunal Plant Consumption in a Calcrete Aquifer

Arid

DOI	10.3389/fevo.2022.854591
	Getting to the Root of Organic Inputs in Groundwaters: Stygofaunal Plant Consumption in a Calcrete Aquifer
	Sacco, Mattia; Campbell, Matthew A.; Nevill, Paul; Humphreys, William F.; Blyth, Alison J.; Grierson, Pauline F.; White, Nicole E.
通讯作者	Saccò, M
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
ISSN	2296-701X
出版年	2022
卷号	10
英文摘要	Groundwater environments interact with and support subterranean biota as well as superficial aquatic and terrestrial ecosystems. However, knowledge of subterranean energy flows remains incomplete. Cross-boundary investigations are needed to better understand the trophic structures of groundwater ecosystems and their reliance on carbon inputs from aboveground. In this study we used carbon and nitrogen stable isotope analyses combined with radiocarbon fingerprints to characterise organic flows in groundwater ecosystems. We coupled these data with DNA metabarcoding of the gut contents of stygofauna to further elucidate organic matter (OM) sources and shifts in diet preferences. Samples were collected from the arid zone Sturt Meadows calcrete aquifer under low rainfall (LR) and high rainfall (HR) conditions. Bayesian modelling of Delta C-14, delta C-13, and delta N-15 data indicated that primary consumers (copepods) incorporated mainly particulate organic carbon (POC) under LR but during HR shifted to root derived material (either exudates or direct root grazing). By contrast, diets of secondary consumers (amphipods) were dominated by root material under both LR and HR. Our DNA metabarcoding-based results indicate that amphipods relied primarily on root inputs from perennial trees (likely Eucalyptus and Callitris) during the dry season (LR). Under HR, diets of both amphipods and copepods also included organic material derived from a broad range of more shallow rooted shrubs, and ephemeral herbs and grasses. Our findings illustrate the complexity of functional linkages between groundwater biota and surface terrestrial ecosystems in environments where aboveground productivity, diversity and OM flux to groundwater are intimately linked to often episodic rainfall.
英文关键词	groundwater stygofauna vegetation organic matter sources seasonal rainfall DNA metabarcoding stable isotope analysis radiocarbon
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000778433500001
WOS关键词	DEPENDENT ECOSYSTEMS ; AUSTRALIA ; FAUNA ; DIVERSITY ; ECOLOGY ; WATER
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392709
推荐引用方式 GB/T 7714	Sacco, Mattia,Campbell, Matthew A.,Nevill, Paul,et al. Getting to the Root of Organic Inputs in Groundwaters: Stygofaunal Plant Consumption in a Calcrete Aquifer[J],2022,10.
APA	Sacco, Mattia.,Campbell, Matthew A..,Nevill, Paul.,Humphreys, William F..,Blyth, Alison J..,...&White, Nicole E..(2022).Getting to the Root of Organic Inputs in Groundwaters: Stygofaunal Plant Consumption in a Calcrete Aquifer.FRONTIERS IN ECOLOGY AND EVOLUTION,10.
MLA	Sacco, Mattia,et al."Getting to the Root of Organic Inputs in Groundwaters: Stygofaunal Plant Consumption in a Calcrete Aquifer".FRONTIERS IN ECOLOGY AND EVOLUTION 10(2022).