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Invertebrate and Microbial Response to Hyporheic Restoration of an Urban Stream. WATER 2021. [DOI: 10.3390/w13040481] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
All cities face complex challenges managing urban stormwater while also protecting urban water bodies. Green stormwater infrastructure and process-based restoration offer alternative strategies that prioritize watershed connectivity. We report on a new urban floodplain restoration technique being tested in the City of Seattle, USA: an engineered hyporheic zone. The hyporheic zone has long been an overlooked component in floodplain restoration. Yet this subsurface area offers enormous potential for stormwater amelioration and is a critical component of healthy streams. From 2014 to 2017, we measured hyporheic temperature, nutrients, and microbial and invertebrate communities at three paired stream reaches with and without hyporheic restoration. At two of the three pairs, water temperature was significantly lower at the restored reach, while dissolved organic carbon and microbial metabolism were higher. Hyporheic invertebrate density and taxa richness were significantly higher across all three restored reaches. These are some of the first quantified responses of hyporheic biological communities to restoration. Our results complement earlier reports of enhanced hydrologic and chemical functioning of the engineered hyporheic zone. Together, this research demonstrates that incorporation of hyporheic design elements in floodplain restoration can enhance temperature moderation, habitat diversity, contaminant filtration, and the biological health of urban streams.
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Wang F, Lin D, Li W, Dou P, Han L, Huang M, Qian S, Yao J. Meiofauna promotes litter decomposition in stream ecosystems depending on leaf species. Ecol Evol 2020; 10:9257-9270. [PMID: 32953059 PMCID: PMC7487239 DOI: 10.1002/ece3.6610] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 11/10/2022] Open
Abstract
Litter decomposition, a fundamental process of nutrient cycling and energy flow in freshwater ecosystems, is driven by a diverse array of decomposers. As an important component of the heterotrophic food web, meiofauna can provide a trophic link between leaf-associated microbes (i.e., bacteria and fungi)/plant detritus and macroinvertebrates, though their contribution to litter decomposition is not well understood. To investigate the role of different decomposer communities in litter decomposition, especially meiofauna, we compared the litter decomposition of three leaf species with different lignin to nitrogen ratios in litter bags with different mesh sizes (0.05, 0.25, and 2 mm) in a forested stream, in China for 78 days. The meiofauna significantly enhanced the decomposition of leaves of high-and medium- quality, while decreasing (negative effect) or increasing (positive effect) the fungal biomass and diversity. Macrofauna and meiofauna together contributed to the decomposition of low-quality leaf species. The presence of meiofauna and macrofauna triggered different aspects of the microbial community, with their effects on litter decomposition varying as a function of leaf quality. This study reveals that the meiofauna increased the trophic complexity and modulated their interactions with microbes, highlighting the important yet underestimated role of meiofauna in detritus-based ecosystems.
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Affiliation(s)
- Fang Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Dunmei Lin
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Wei Li
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Pengpeng Dou
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Le Han
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Mingfen Huang
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Shenhua Qian
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Jingmei Yao
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
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Rossi F, Mallet C, Portelli C, Donnadieu F, Bonnemoy F, Artigas J. Stimulation or inhibition: Leaf microbial decomposition in streams subjected to complex chemical contamination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 648:1371-1383. [PMID: 30340282 DOI: 10.1016/j.scitotenv.2018.08.197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 08/14/2018] [Accepted: 08/15/2018] [Indexed: 06/08/2023]
Abstract
Leaf litter decomposition is a key mechanism in headwater streams, allowing the transfer of nutrients and energy into the entire food web. However, chemical contamination resulting from human activity may exert a high pressure on the process, possibly threatening the structure of heterotrophic microbial communities and their decomposition abilities. In this study, the rates of microbial Alnus glutinosa (Alnus) leaf decay were assessed in six French watersheds displaying different land use (agricultural, urbanized, forested) and over four seasons (spring, summer, autumn, winter). In addition, for each watershed at each sampling time, both upstream (less-contaminated) and downstream (more-contaminated) sections were monitored. Toxicities (estimated as toxic units) predicted separately for pesticides and pharmaceuticals as well as environmental parameters (including nutrient levels) were related to microbial decay rates corrected for temperature and a range of fungal and bacterial community endpoints, including biomass, structure, and activity (extracellular ligninolytic and cellulolytic enzymatic activities). Results showed that agricultural and urbanized watersheds were more contaminated for nutrients and xenobiotics (higher pesticides and pharmaceuticals predicted toxicity) than forested watersheds. However, Alnus decay rates were higher in agricultural and urbanized watersheds, suggesting compensatory effects of nutrients over xenobiotics. Conversely, fungal biomass in leaves was 2-fold and 1.4-fold smaller in urbanized and agricultural watersheds than in the forested watersheds, respectively, which was mostly related to pesticide toxicity. However, no clear pattern was observed for extracellular enzymatic activities except that β-glucosidase activity positively correlated with Alnus decay rates. Together, these results highlight microbial communities being more efficient for leaf decomposition in polluted watersheds than in less contaminated ones, which is probably explained by changes in microbial community structure. Overall, our study showed that realistic chemical contamination in stream ecosystems may affect the biomass of Alnus-associated microbial communities but that these communities can adapt themselves to xenobiotics and maintain ecosystem functions.
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Affiliation(s)
- Florent Rossi
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France.
| | - Clarisse Mallet
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France
| | - Christophe Portelli
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France
| | - Florence Donnadieu
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France
| | - Frédérique Bonnemoy
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France
| | - Joan Artigas
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France
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Majdi N, Traunspurger W. Leaf fall affects the isotopic niches of meiofauna and macrofauna in a stream food web. FOOD WEBS 2017. [DOI: 10.1016/j.fooweb.2017.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mora-Gómez J, Elosegi A, Duarte S, Cássio F, Pascoal C, Romaní AM. Differences in the sensitivity of fungi and bacteria to season and invertebrates affect leaf litter decomposition in a Mediterranean stream. FEMS Microbiol Ecol 2016; 92:fiw121. [PMID: 27288197 DOI: 10.1093/femsec/fiw121] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/01/2016] [Indexed: 11/13/2022] Open
Abstract
Microorganisms are key drivers of leaf litter decomposition; however, the mechanisms underlying the dynamics of different microbial groups are poorly understood. We investigated the effects of seasonal variation and invertebrates on fungal and bacterial dynamics, and on leaf litter decomposition. We followed the decomposition of Populus nigra litter in a Mediterranean stream through an annual cycle, using fine and coarse mesh bags. Irrespective of the season, microbial decomposition followed two stages. Initially, bacterial contribution to total microbial biomass was higher compared to later stages, and it was related to disaccharide and lignin degradation; in a later stage, bacteria were less important and were associated with hemicellulose and cellulose degradation, while fungi were related to lignin decomposition. The relevance of microbial groups in decomposition differed among seasons: fungi were more important in spring, whereas in summer, water quality changes seemed to favour bacteria and slowed down lignin and hemicellulose degradation. Invertebrates influenced litter-associated microbial assemblages (especially bacteria), stimulated enzyme efficiencies and reduced fungal biomass. We conclude that bacterial and fungal assemblages play distinctive roles in microbial decomposition and differ in their sensitivity to environmental changes, ultimately affecting litter decomposition, which might be particularly relevant in highly seasonal ecosystems, such as intermittent streams.
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Affiliation(s)
- Juanita Mora-Gómez
- GRECO, Institute of Aquatic Ecology, University of Girona, Campus Montilivi, 17071 Girona, Spain
| | - Arturo Elosegi
- Faculty of Science and Technology, University of the Basque Country, UPV/EHU, PO Box 644, 48080 Bilbao, Spain
| | - Sofia Duarte
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Fernanda Cássio
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Cláudia Pascoal
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Anna M Romaní
- GRECO, Institute of Aquatic Ecology, University of Girona, Campus Montilivi, 17071 Girona, Spain
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Abril M, Muñoz I, Menéndez M. Heterogeneity in leaf litter decomposition in a temporary Mediterranean stream during flow fragmentation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 553:330-339. [PMID: 26930306 DOI: 10.1016/j.scitotenv.2016.02.082] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/11/2016] [Accepted: 02/12/2016] [Indexed: 05/05/2023]
Abstract
In temporary Mediterranean streams, flow fragmentation during summer droughts originates an ephemeral mosaic of terrestrial and aquatic habitat types. The heterogeneity of habitat types implies a particular ecosystem functioning in temporary streams that is still poorly understood. We assessed the initial phases of leaf litter decomposition in selected habitat types: running waters, isolated pools and moist and dry streambed sediments. We used coarse-mesh litter bags containing Populus nigra leaves to examine decomposition rates, microbial biomass, macroinvertebrate abundance and dissolved organic carbon (DOC) release rates in each habitat type over an 11-day period in late summer. We detected faster decomposition rates in aquatic (running waters and isolated pools) than in terrestrial habitats (moist and dry streambed sediments). Under aquatic conditions, decomposition was characterized by intense leaching and early microbial colonization, which swiftly started to decompose litter. Microbial colonization in isolated pools was primarily dominated by bacteria, whereas in running waters fungal biomass predominated. Under terrestrial conditions, leaves were most often affected by abiotic processes that resulted in small mass losses. We found a substantial decrease in DOC release rates in both aquatic habitats within the first days of the study, whereas DOC release rates remained relatively stable in the moist and dry sediments. This suggests that leaves play different roles as a DOC source during and after flow fragmentation. Overall, our results revealed that leaf decomposition is heterogeneous during flow fragmentation, which has implications related to DOC utilization that should be considered in future regional carbon budgets.
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Affiliation(s)
- Meritxell Abril
- Departament d'Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
| | - Isabel Muñoz
- Departament d'Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Margarita Menéndez
- Departament d'Ecologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
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Majdi N, Boiché A, Traunspurger W, Lecerf A. Predator effects on a detritus-based food web are primarily mediated by non-trophic interactions. J Anim Ecol 2014; 83:953-62. [DOI: 10.1111/1365-2656.12189] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 11/24/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Nabil Majdi
- EcoLab; Université de Toulouse; UPS; INPT; Toulouse France
- EcoLab; CNRS; Toulouse France
| | - Anatole Boiché
- EcoLab; Université de Toulouse; UPS; INPT; Toulouse France
- EcoLab; CNRS; Toulouse France
| | | | - Antoine Lecerf
- EcoLab; Université de Toulouse; UPS; INPT; Toulouse France
- EcoLab; CNRS; Toulouse France
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GONÇALVES JR JOSÉF, REZENDE RENANS, MARTINS NARLIANEM, GREGÓRIO RENERS. Leaf breakdown in an Atlantic Rain Forest stream. AUSTRAL ECOL 2012. [DOI: 10.1111/j.1442-9993.2011.02341.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Febria CM, Beddoes P, Fulthorpe RR, Williams DD. Bacterial community dynamics in the hyporheic zone of an intermittent stream. ISME JOURNAL 2011; 6:1078-88. [PMID: 22158391 DOI: 10.1038/ismej.2011.173] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The dynamics of in situ bacterial communities in the hyporheic zone of an intermittent stream were described in high spatiotemporal detail. We assessed community dynamics in stream sediments and interstitial pore water over a two-year period using terminal-restriction fragment length polymorphism. Here, we show that sediments remained saturated despite months of drought and limited hydrologic connectivity. The intermittency of stream surface water affected interstitial pore water communities more than hyporheic sediment communities. Seasonal changes in bacterial community composition was significantly associated with water intermittency, phosphate concentrations, temperature, nitrate and dissolved organic carbon (DOC) concentrations. During periods of low- to no-surface water, communities changed from being rich in operational taxonomic units (OTUs) in isolated surface pools, to a few OTUs overall, including an overall decline in both common and rare taxa. Individual OTUs were compared between porewater and sediments. A total of 19% of identified OTUs existed in both porewater and sediment samples, suggesting that bacteria use hyporheic sediments as a type of refuge from dessication, transported through hydrologically connected pore spaces. Stream intermittency impacted bacterial diversity on rapid timescales (that is, within days), below-ground and in the hyporheic zone. Owing to the coupling of intermittent streams to the surrounding watershed, we stress the importance of understanding connectivity at the pore scale, consequences for below-ground and above-ground biodiversity and nutrient processing, and across both short- and long-time periods (that is, days to months to years).
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Affiliation(s)
- Catherine M Febria
- Surface and Groundwater Ecology Research Group, University of Toronto Scarborough, Toronto, Ontario, Canada.
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Tank JL, Rosi-Marshall EJ, Griffiths NA, Entrekin SA, Stephen ML. A review of allochthonous organic matter dynamics and metabolism in streams. ACTA ACUST UNITED AC 2010. [DOI: 10.1899/08-170.1] [Citation(s) in RCA: 520] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jennifer L. Tank
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana 46556 USA
| | | | - Natalie A. Griffiths
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana 46556 USA
| | - Sally A. Entrekin
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana 46556 USA
| | - Mia L. Stephen
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana 46556 USA
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