干旱区生态环境知识资源中心(Arid): Elucidating stygofaunal trophic web interactions via isotopic ecology

Arid

DOI	10.1371/journal.pone.0223982
	Elucidating stygofaunal trophic web interactions via isotopic ecology
	Sacco, Mattia; Blyth, Alison J.; Humphreys, William F.; Kuhl, Alison; Mazumder, Debashish; Smith, Colin; Grice, Kliti
通讯作者	Sacco, M (corresponding author), Curtin Univ, WA Organ Isotope Geochem Ctr, Sch Earth & Planetary Sci, Inst Geosci Res, Bentley, WA, Australia.
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2019
卷号	14 期号:10
英文摘要	Subterranean ecosystems host highly adapted aquatic invertebrate biota which play a key role in sustaining groundwater ecological functioning and hydrological dynamics. However, functional biodiversity studies in groundwater environments, the main source of unfrozen freshwater on Earth, are scarce, probably due to the cryptic nature of the systems. To address this, we investigate groundwater trophic ecology via stable isotope analysis, employing delta C-13 and delta N-15 in bulk tissues, and amino acids. Specimens were collected from a shallow calcrete aquifer in the arid Yilgarn region of Western Australia: a well-known hotspot for stygofaunal biodiversity. Sampling campaigns were carried out during dry (low rainfall: LR) and the wet (high rainfall: HR) periods. delta C-13 values indicate that most of the stygofauna shifted towards more C-13-depleted carbon sources under HR, suggesting a preference for fresher organic matter. Conversion of delta N-15 values in glutamic acid and phenylalanine to a trophic index showed broadly stable trophic levels with organisms clustering as low-level secondary consumers. However, mixing models indicate that HR conditions trigger changes in dietary preferences, with increasing predation of amphipods by beetle larvae. Overall, stygofauna showed a tendency towards opportunistic and omnivorous habits-typical of an ecologically tolerant community-shaped by bottom-up controls linked with changes in carbon flows. This study provides baseline biochemical and ecological data for stygofaunal trophic interactions in calcretes. Further studies on the carbon inputs and taxa-specific physiology will help refine the interpretation of the energy flows shaping biodiversity in groundwaters. This will aid understanding of groundwater ecosystem functioning and allow modelling of the impact of future climate change factors such as aridification.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000532566600064
WOS关键词	ACID DELTA-C-13 ANALYSIS ; BOTTOM-UP FORCES ; TOP-DOWN ; STABLE-ISOTOPES ; ORGANIC-MATTER ; AMINO-ACIDS ; FOOD WEBS ; GROUNDWATER BIODIVERSITY ; CALCRETE AQUIFER ; RELATIVE ROLES
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369801
作者单位	[Sacco, Mattia; Blyth, Alison J.; Grice, Kliti] Curtin Univ, WA Organ Isotope Geochem Ctr, Sch Earth & Planetary Sci, Inst Geosci Res, Bentley, WA, Australia; [Humphreys, William F.] Western Australian Museum, Collect & Res Ctr, Welshpool, WA 6986, Australia; [Humphreys, William F.] Univ Western Australia, Sch Biol Sci, Crawley, WA, Australia; [Kuhl, Alison] Univ Bristol, Bristol Biogeochem Res Ctr, Sch Chem, Organ Geochem Unit, Bristol, Avon, England; [Mazumder, Debashish] Australian Nucl Sci & Technol Org ANSTO, Locked Bag 2001, Kirrawee Dc, NSW, Australia; [Smith, Colin] La Trobe Univ, Dept Archaeol & Hist, Bundoora, Vic, Australia
推荐引用方式 GB/T 7714	Sacco, Mattia,Blyth, Alison J.,Humphreys, William F.,et al. Elucidating stygofaunal trophic web interactions via isotopic ecology[J]. University of Western Australia,2019,14(10).
APA	Sacco, Mattia.,Blyth, Alison J..,Humphreys, William F..,Kuhl, Alison.,Mazumder, Debashish.,...&Grice, Kliti.(2019).Elucidating stygofaunal trophic web interactions via isotopic ecology.PLOS ONE,14(10).
MLA	Sacco, Mattia,et al."Elucidating stygofaunal trophic web interactions via isotopic ecology".PLOS ONE 14.10(2019).