Rainfall as a trigger of ecological cascade effects in an Australian groundwater ecosystem
Open Access
- 12 February 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 11 (1), 1-15
- https://doi.org/10.1038/s41598-021-83286-x
Abstract
Groundwaters host vital resources playing a key role in the near future. Subterranean fauna and microbes are crucial in regulating organic cycles in environments characterized by low energy and scarce carbon availability. However, our knowledge about the functioning of groundwater ecosystems is limited, despite being increasingly exposed to anthropic impacts and climate change-related processes. In this work we apply novel biochemical and genetic techniques to investigate the ecological dynamics of an Australian calcrete under two contrasting rainfall periods (LR—low rainfall and HR—high rainfall). Our results indicate that the microbial gut community of copepods and amphipods experienced a shift in taxonomic diversity and predicted organic functional metabolic pathways during HR. The HR regime triggered a cascade effect driven by microbes (OM processors) and exploited by copepods and amphipods (primary and secondary consumers), which was finally transferred to the aquatic beetles (top predators). Our findings highlight that rainfall triggers ecological shifts towards more deterministic dynamics, revealing a complex web of interactions in seemingly simple environmental settings. Here we show how a combined isotopic-molecular approach can untangle the mechanisms shaping a calcrete community. This design will help manage and preserve one of the most vital but underrated ecosystems worldwide.Funding Information
- Australian Research Council (LP140100555)
- Curtin University of Technology (Curtin International Postgraduate Research Scholarship)
- Australian Institute of Nuclear Science and Engineering (AINSE postgraduate scholarship)
This publication has 70 references indexed in Scilit:
- Predictive functional profiling of microbial communities using 16S rRNA marker gene sequencesNature Biotechnology, 2013
- phyloseq: An R Package for Reproducible Interactive Analysis and Graphics of Microbiome Census DataPLOS ONE, 2013
- Anaerobic utilization of toluene by marine alpha- and gammaproteobacteria reducing nitrateMicrobiology, 2012
- Ants and termites increase crop yield in a dry climateNature Communications, 2011
- Global patterns of 16S rRNA diversity at a depth of millions of sequences per sampleProceedings of the National Academy of Sciences of the United States of America, 2010
- VIEWPOINT. Is the Australian subterranean fauna uniquely diverse?Invertebrate Systematics, 2010
- Microbial communities in karst groundwater and their potential use for biomonitoringHydrogeology Journal, 2008
- KEGG: Kyoto Encyclopedia of Genes and GenomesNucleic Acids Research, 2000
- Beneficial effects of plants in the remediation of soil and groundwater contaminated with organic materialsCritical Reviews in Environmental Science and Technology, 1993
- Basic local alignment search toolJournal of Molecular Biology, 1990