Tess Nelson, Grant C. Hose, Jodie Dabovic, Kathryn L. Korbel
{"title":"盐度对农业景观中地下水微生物群落的主要影响","authors":"Tess Nelson, Grant C. Hose, Jodie Dabovic, Kathryn L. Korbel","doi":"10.1071/mf23014","DOIUrl":null,"url":null,"abstract":"<strong> Context</strong><p>Understanding the impacts of salinity on groundwater microbial communities is imperative, because these communities influence groundwater chemistry, quality, and its suitability for use by humans and the environment.</p><strong> Aim</strong><p>To assess groundwater salinisation and its influence on groundwater microbial communities within the Murray–Darling Basin (MDB), Australia.</p><strong> Methods</strong><p>Alluvial aquifers were sampled from 41 bores, within the Lachlan, Murrumbidgee and Murray catchments. Environmental DNA (eDNA), microbial activity and water-quality variables were measured to evaluate microbial communities, which were then correlated with electrical conductivity (EC) and other environmental variables.</p><strong> Results</strong><p>Our results indicated widespread groundwater salinisation within the MDB, with EC ranging from 63 to 51 257 μS cm<sup>−1</sup>. The highest EC values were recorded in the Murray catchment; however, mean EC values did not differ significantly among catchments (<i>P</i> > 0.05). The composition of microbial communities differed significantly between sites with low (<3000 μS cm<sup>−1</sup>) and high (>3000 μS cm<sup>−1</sup>) EC. Microbial activity, richness and abundances were all greater at low- than high-EC sites.</p><strong> Conclusions</strong><p>Changes to microbial communities as demonstrated here may have impacts on biogeochemical cycling and ecosystem resilience.</p><strong> Implications</strong><p>The detrimental ecological impacts of salinity are not limited to groundwater microbes, but present a larger ecological issue affecting all groundwater-dependent ecosystems.</p>","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"96 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Salinity as a major influence on groundwater microbial communities in agricultural landscapes\",\"authors\":\"Tess Nelson, Grant C. Hose, Jodie Dabovic, Kathryn L. Korbel\",\"doi\":\"10.1071/mf23014\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<strong> Context</strong><p>Understanding the impacts of salinity on groundwater microbial communities is imperative, because these communities influence groundwater chemistry, quality, and its suitability for use by humans and the environment.</p><strong> Aim</strong><p>To assess groundwater salinisation and its influence on groundwater microbial communities within the Murray–Darling Basin (MDB), Australia.</p><strong> Methods</strong><p>Alluvial aquifers were sampled from 41 bores, within the Lachlan, Murrumbidgee and Murray catchments. Environmental DNA (eDNA), microbial activity and water-quality variables were measured to evaluate microbial communities, which were then correlated with electrical conductivity (EC) and other environmental variables.</p><strong> Results</strong><p>Our results indicated widespread groundwater salinisation within the MDB, with EC ranging from 63 to 51 257 μS cm<sup>−1</sup>. The highest EC values were recorded in the Murray catchment; however, mean EC values did not differ significantly among catchments (<i>P</i> > 0.05). The composition of microbial communities differed significantly between sites with low (<3000 μS cm<sup>−1</sup>) and high (>3000 μS cm<sup>−1</sup>) EC. Microbial activity, richness and abundances were all greater at low- than high-EC sites.</p><strong> Conclusions</strong><p>Changes to microbial communities as demonstrated here may have impacts on biogeochemical cycling and ecosystem resilience.</p><strong> Implications</strong><p>The detrimental ecological impacts of salinity are not limited to groundwater microbes, but present a larger ecological issue affecting all groundwater-dependent ecosystems.</p>\",\"PeriodicalId\":18209,\"journal\":{\"name\":\"Marine and Freshwater Research\",\"volume\":\"96 1\",\"pages\":\"\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-01-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Marine and Freshwater Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1071/mf23014\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"FISHERIES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Marine and Freshwater Research","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1071/mf23014","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FISHERIES","Score":null,"Total":0}
Salinity as a major influence on groundwater microbial communities in agricultural landscapes
Context
Understanding the impacts of salinity on groundwater microbial communities is imperative, because these communities influence groundwater chemistry, quality, and its suitability for use by humans and the environment.
Aim
To assess groundwater salinisation and its influence on groundwater microbial communities within the Murray–Darling Basin (MDB), Australia.
Methods
Alluvial aquifers were sampled from 41 bores, within the Lachlan, Murrumbidgee and Murray catchments. Environmental DNA (eDNA), microbial activity and water-quality variables were measured to evaluate microbial communities, which were then correlated with electrical conductivity (EC) and other environmental variables.
Results
Our results indicated widespread groundwater salinisation within the MDB, with EC ranging from 63 to 51 257 μS cm−1. The highest EC values were recorded in the Murray catchment; however, mean EC values did not differ significantly among catchments (P > 0.05). The composition of microbial communities differed significantly between sites with low (<3000 μS cm−1) and high (>3000 μS cm−1) EC. Microbial activity, richness and abundances were all greater at low- than high-EC sites.
Conclusions
Changes to microbial communities as demonstrated here may have impacts on biogeochemical cycling and ecosystem resilience.
Implications
The detrimental ecological impacts of salinity are not limited to groundwater microbes, but present a larger ecological issue affecting all groundwater-dependent ecosystems.
期刊介绍：
Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed.
Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences.
Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.
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