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Trevathan-Tackett SM, Kepfer-Rojas S, Engelen AH, York PH, Ola A, Li J, Kelleway JJ, Jinks KI, Jackson EL, Adame MF, Pendall E, Lovelock CE, Connolly RM, Watson A, Visby I, Trethowan A, Taylor B, Roberts TNB, Petch J, Farrington L, Djukic I, Macreadie PI. Ecosystem type drives tea litter decomposition and associated prokaryotic microbiome communities in freshwater and coastal wetlands at a continental scale. Sci Total Environ 2021; 782:146819. [PMID: 33838377 DOI: 10.1016/j.scitotenv.2021.146819] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/22/2021] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
Wetland ecosystems are critical to the regulation of the global carbon cycle, and there is a high demand for data to improve carbon sequestration and emission models and predictions. Decomposition of plant litter is an important component of ecosystem carbon cycling, yet a lack of knowledge on decay rates in wetlands is an impediment to predicting carbon preservation. Here, we aim to fill this knowledge gap by quantifying the decomposition of standardised green and rooibos tea litter over one year within freshwater and coastal wetland soils across four climates in Australia. We also captured changes in the prokaryotic members of the tea-associated microbiome during this process. Ecosystem type drove differences in tea decay rates and prokaryotic microbiome community composition. Decomposition rates were up to 2-fold higher in mangrove and seagrass soils compared to freshwater wetlands and tidal marshes, in part due to greater leaching-related mass loss. For tidal marshes and freshwater wetlands, the warmer climates had 7-16% less mass remaining compared to temperate climates after a year of decomposition. The prokaryotic microbiome community composition was significantly different between substrate types and sampling times within and across ecosystem types. Microbial indicator analyses suggested putative metabolic pathways common across ecosystems were used to breakdown the tea litter, including increased presence of putative methylotrophs and sulphur oxidisers linked to the introduction of oxygen by root in-growth over the incubation period. Structural equation modelling analyses further highlighted the importance of incubation time on tea decomposition and prokaryotic microbiome community succession, particularly for rooibos tea that experienced a greater proportion of mass loss between three and twelve months compared to green tea. These results provide insights into ecosystem-level attributes that affect both the abiotic and biotic controls of belowground wetland carbon turnover at a continental scale, while also highlighting new decay dynamics for tea litter decomposing under longer incubations.
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Affiliation(s)
- Stacey M Trevathan-Tackett
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, 221 Burwood Hwy, Burwood, VIC 3125, Australia.
| | - Sebastian Kepfer-Rojas
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Rolighedsvej 23, 1958 Frederiksberg, Denmark
| | - Aschwin H Engelen
- Centre for Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Paul H York
- James Cook University, Centre for Tropical Water and Aquatic Ecosystem Research (TropWATER), Cairns, Queensland 4870, Australia
| | - Anne Ola
- The University of Queensland, School of Biological Sciences, St. Lucia, Queensland 4072, Australia
| | - Jinquan Li
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia; National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Jeffrey J Kelleway
- School of Earth, Atmospheric and Life Sciences, GeoQuEST Research Centre, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Kristin I Jinks
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Emma L Jackson
- Coastal Marine Ecosystems Research Centre, CQUniversity, Gladstone, QLD 4680, Australia
| | | | - Elise Pendall
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2751, Australia
| | - Catherine E Lovelock
- The University of Queensland, School of Biological Sciences, St. Lucia, Queensland 4072, Australia
| | - Rod M Connolly
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Anne Watson
- School of Natural Sciences, University of Tasmania, Sandy Bay, TAS 7005, Australia
| | - Inger Visby
- Derwent Estuary Program, 24 Davey St Hobart, TAS 7001, Australia
| | - Allison Trethowan
- RiverConnect - Greater Shepparton City Council, Shepparton, VIC 3630, Australia
| | - Ben Taylor
- Nature Glenelg Trust, PO Box 2177, Mt Gambier, SA 5290, Australia
| | | | - Jane Petch
- Melbourne Water, South East Regional Office, Worsley Road, Bangholme, VIC 3175, Australia
| | | | - Ika Djukic
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland
| | - Peter I Macreadie
- Deakin University, Centre for Integrative Ecology, School of Life and Environmental Sciences, 221 Burwood Hwy, Burwood, VIC 3125, Australia
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Joglekar SN, Darwai V, Mandavgane SA, Kulkarni BD. A methodology of evaluating sustainability index of a biomass processing enterprise: a case study of native cow dung-urine biorefinery. Environ Sci Pollut Res Int 2020; 27:27435-27448. [PMID: 31621028 DOI: 10.1007/s11356-019-06309-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
Agriculture and its allied sector contribute significantly to the gross domestic product of every country. Several small-scale enterprises engaged in waste biomass processing have been setup recently. Such industrial setups not only help in solving the waste management issues but also play an important role in offering employment at the grass root level generating a significant social impact along with economic advantage to the local entrepreneur. Hence, assessment of such biomass processing enterprise (BPE) based on economic, environment, and social parameters has become necessary. In this paper, a general framework for sustainability assessment is discussed using a case study of cow dung-urine biorefinery as a representative BPE. Real-time data of BPE has been collected for evaluation and a sustainability index (SI) is evaluated using multicriteria decision method. The SI is calculated as per the weightage assigned and value function of the indicator and criteria. The SI for the BPE was observed to be 0.69 for the chosen set of criteria and indicator and weightages. A sensitivity analysis has been performed to check the dependence of the results on the weightages assigned to various criteria and indicators. It was also observed that the results were more sensitive to the indicators having a low value function.
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Affiliation(s)
- Saurabh N Joglekar
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology, South Ambazari road, Nagpur, Maharashtra, 440010, India.
| | - Vivek Darwai
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology, South Ambazari road, Nagpur, Maharashtra, 440010, India.
| | - Sachin A Mandavgane
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology, South Ambazari road, Nagpur, Maharashtra, 440010, India.
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Antwis RE, Edwards KL, Unwin B, Walker SL, Shultz S. Rare gut microbiota associated with breeding success, hormone metabolites and ovarian cycle phase in the critically endangered eastern black rhino. Microbiome 2019; 7:27. [PMID: 30770764 PMCID: PMC6377766 DOI: 10.1186/s40168-019-0639-0] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/29/2019] [Indexed: 05/20/2023]
Abstract
BACKGROUND Host microbiomes play a role in hormone production and subsequent fertility in humans, but this is less well understood in non-model organisms. This is of particular relevance to species in zoo-based conservation breeding programmes, as relationships between host microbiome composition and reproductive output may allow for the development of microbial augmentation strategies to improve success. Here, we characterise faecal bacterial communities of breeding and non-breeding eastern black rhino (Diceros bicornis michaeli) using 16S rRNA gene amplicon sequencing and quantify progestagen and glucocorticoid metabolite concentrations through enzyme immunoassays to identify such relationships. RESULTS We identified significant differences in black rhino gut microbiome composition according to ID, institution, breeding success and ovarian cycle phase. In particular, the gut microbiome during pregnancy and post-parturition was significantly altered. Around a third of bacterial genera showed more than ± 10% correlation with either progestagen and/or glucocorticoid concentration, and in general, microbial genera correlated with both hormones in the same direction. Through a combination of analyses, we identified four genera (Aerococcaceae, Atopostipes, Carnobacteriaceae and Solobacterium) that were significantly associated with breeding success, pregnancy and/or post-parturition, and higher faecal progestagen metabolite concentrations. These genera had a lower-than-average relative abundance in the gut microbiome. CONCLUSION Our results indicate that many members of the gut microbiome of black rhino are associated with hormone production and breeding success, and some members of the rare microbiota appear to be particularly important. Although the directionality of the relationship is unclear, the variation in gut microbiome communities represents a potential biomarker of reproductive health. We identified four genera that were associated with multiple indicators of reproductive output; these could be candidate probiotics to improve the breeding success of black rhino in zoo-based conservation breeding programmes. Further work is required to understand the efficacy and feasibility of this, either directly through microbial augmentation (e.g. probiotics) or indirectly via dietary manipulation or prebiotics.
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Affiliation(s)
- Rachael E Antwis
- School of Environment and Life Sciences, University of Salford, Salford, UK.
| | - Katie L Edwards
- Center for Species Survival, Smithsonian Conservation Biology Institute, Front Royal, VA, USA
| | - Bryony Unwin
- School of Environment and Life Sciences, University of Salford, Salford, UK
| | - Susan L Walker
- North of England Zoological Society, Chester Zoo, Upton-by-Chester, UK
| | - Susanne Shultz
- School of Earth and Environmental Sciences, University of Manchester, Manchester, UK
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