1
|
Juvigny-Khenafou NPD, Burgazzi G, Steiner N, Harvey E, Terui A, Piggott J, Manfrin A, Feckler A, Leese F, Schäfer RB. Effects of flow reduction and artificial light at night (ALAN) on litter decomposition and invertebrate communities in streams: A flume experiment. Sci Total Environ 2024; 912:168836. [PMID: 38016568 DOI: 10.1016/j.scitotenv.2023.168836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/03/2023] [Revised: 11/19/2023] [Accepted: 11/22/2023] [Indexed: 11/30/2023]
Abstract
River ecosystems are heavily impacted by multiple stressors, where effects can cascade downstream of point sources. However, a spatial approach to assess the effects of multiple stressors is missing. We assessed the local and downstream effects on litter decomposition, and associated invertebrate communities of two stressors: flow reduction and artificial light at night (ALAN). We used an 18-flow-through mesocosm system consisting of two tributaries, where we applied the stressors, merging in a downstream section. We assessed the changes in decomposition rate and invertebrate community structure in leaf bags. We found no effect of ALAN or its interaction with flow reduction on the litter decomposition or the invertebrate community in the tributaries. Flow reduction alone led to a 14.8 % reduction in decomposition rate in the tributaries. We recorded no effect of flow reduction on the macroinvertebrates community composition in the litter bags. We also observed no effects of the spatial arrangement of the stressors on the litter decomposition and macroinvertebrate community structure downstream. Overall, our results suggest the impact of stressors on litter decomposition and macroinvertebrate communities remained local in our experiment. Our work thus calls for further studies to identify the mechanisms and the conditions under which spatial effects dominate over local processes.
Collapse
Affiliation(s)
- Noël P D Juvigny-Khenafou
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany.
| | - Gemma Burgazzi
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Nikita Steiner
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Eric Harvey
- Centre de Recherche sur les Interactions Bassins-Versants, Écosystèmes Aquatiques (RIVE) Université du Québec à Trois-Rivières, Canada
| | - Akira Terui
- Department of Biology, University of North Carolina at Greensboro, Greensboro, USA
| | - Jeremy Piggott
- Trinity Centre for the Environment & Discipline of Zoology, School of Natural Sciences, Trinity College Dublin, The University of Dublin, College Green, Dublin 2, Ireland
| | - Alessandro Manfrin
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Alexander Feckler
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany; Eußerthal Ecosystem Research Station, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Florian Leese
- Aquatic Ecosystem Research, University of Duisburg-Essen, Essen, Germany
| | - Ralf B Schäfer
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| |
Collapse
|
2
|
Miliša M, Stubbington R, Datry T, Cid N, Bonada N, Šumanović M, Milošević D. Taxon-specific sensitivities to flow intermittence reveal macroinvertebrates as potential bioindicators of intermittent rivers and streams. Sci Total Environ 2022; 804:150022. [PMID: 34517322 DOI: 10.1016/j.scitotenv.2021.150022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 06/24/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
As complex mosaics of lotic, lentic, and terrestrial habitats, intermittent rivers and ephemeral streams (IRES) support high biodiversity. Despite their ecological importance, IRES are poorly represented in routine monitoring programs, but recent recognition of their considerable-and increasing-spatiotemporal extent is motivating efforts to better represent IRES in ecological status assessments. We examine response patterns of aquatic macroinvertebrate communities and taxa to flow intermittence (FI) across three European climatic regions. We used self-organizing map (SOM) to ordinate and classify sampling sites based on community structure in regions with continental, Mediterranean and oceanic climates. The SOM passively introduced FI, quantified as the mean annual % flow, and visualized its variability across classified communities, revealing a clear association between community structure and FI in all regions. Indicator species analysis identified taxa indicative of low, intermediate and high FI. In the continental region, the amphipod Niphargus was indicative of high FI and was associated with groundwater-fed IRES, whereas indicators of Mediterranean IRES comprised Odonata, Coleoptera and Heteroptera taxa, which favor lentic conditions. In the oceanic region, taxa indicative of relatively high FI included leuctrid stoneflies and a limnephilid caddisfly, likely reflecting the colonization of IRES by aerial adults from nearby perennial reaches. The Diptera families Chironomidae and Simuliidae showed contrasting FI preferences among regions, reflecting environmental heterogeneity between regions and the coarse taxonomic resolution to which these organisms were identified. These region-specific community and taxon responses of aquatic biota to FI highlight the need to adapt standard biotic indices to enable effective ecological status assessments in IRES.
Collapse
Affiliation(s)
- Marko Miliša
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Rachel Stubbington
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
| | - Thibault Datry
- INRAE, UR RiverLy, Centre de Lyon-Villeurbanne, 5 rue de la Doua CS20244, 69625 Villeurbanne Cedex, France
| | - Núria Cid
- INRAE, UR RiverLy, Centre de Lyon-Villeurbanne, 5 rue de la Doua CS20244, 69625 Villeurbanne Cedex, France; FEHM-Lab (Freshwater Ecology, Hydrology and Management), Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Diagonal 643, 08028 Barcelona, Catalonia, Spain
| | - Núria Bonada
- FEHM-Lab (Freshwater Ecology, Hydrology and Management), Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Diagonal 643, 08028 Barcelona, Catalonia, Spain
| | - Marina Šumanović
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Djuradj Milošević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia.
| |
Collapse
|
3
|
Arias-Real R, Muñoz I, Gutierrez-Cánovas C, Granados V, Lopez-Laseras P, Menéndez M. Subsurface zones in intermittent streams are hotspots of microbial decomposition during the non-flow period. Sci Total Environ 2020; 703:135485. [PMID: 31761375 DOI: 10.1016/j.scitotenv.2019.135485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 07/11/2019] [Revised: 11/08/2019] [Accepted: 11/10/2019] [Indexed: 06/10/2023]
Abstract
The microbial decomposition of organic matter is a fundamental ecosystem process that transforms organic matter and fuels detritus-based food webs, influencing biogeochemical cycles such as C-cycling. The efficiency of this process can be compromised during the non-flow periods of intermittent and ephemeral streams (IRES). When water flow ceases, sediments represent the last wet habitat available to microorganisms and may play an important role in sustaining microbial decomposition. However, despite the increasing prevalence of IRES due to climate change and water abstraction, it is unclear to what degree the subsurface habitat can sustain microbial decomposition during non-flow periods. In order to gather information, we selected 20 streams across Catalonia (Spain) along a gradient of flow intermittency, where we measured microbial decomposition and fungal biomass by placing wood sticks in both the surface and subsurface zones (15 cm below the streambed) over the course of one hydrological year. Our results showed that microbial decomposition and fungal biomass were consistently greater in the subsurface zone than in the surface zone, when intermittency increased. Although flow intermittency was the main driver of both microbial decomposition and fungal biomass, phosphorus availability in the water, sediment C:N ratio and sediment grain size also played relevant roles in surface and subsurface organic matter processing. Thus, our findings demonstrate that although the OM processing in both zones decreases with increased intermittency, the subsurface zone made an important contribution during the non-flow periods in IRES. Therefore, subsurface activity during non-flow periods has the potential to affect and maintain ecosystem functioning.
Collapse
Affiliation(s)
- Rebeca Arias-Real
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain..
| | - Isabel Muñoz
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
| | - Cayetano Gutierrez-Cánovas
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain.; Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal.; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Verónica Granados
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
| | - Pilar Lopez-Laseras
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
| | - Margarita Menéndez
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
| |
Collapse
|
4
|
Oprei A, Zlatanović S, Mutz M. Grazers superimpose humidity effect on stream biofilm resistance and resilience to dry-rewet stress. Sci Total Environ 2019; 659:841-850. [PMID: 31096414 DOI: 10.1016/j.scitotenv.2018.12.316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 09/30/2018] [Revised: 12/17/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Temperate low order streams increasingly experience intermittency and drying due to climate change. In comparison to well-studied Mediterranean streams, drying events in canopied temperate streams occur under higher ambient humidity which probably affects the metabolic response to drying. Previous work on drying sediments (in temperate streams) did not consider the interactions of trophic levels. We hypothesized that preservation of sediment moisture due to high humidity increases resistance to drying in temperate streambed biofilms and fast resilience of biofilm activity after flow resumption. We also expected the presence of macroinvertebrate grazers to modulate the biofilm response to dry-rewet stress. Following a two-level factorial design in 24 microcosms, we tested the effect of drying intensity (moderate and intense) and grazer presence and absence (P. antipodarum) on the activity of biofilm colonizing shallow hyporheic sediment. We measured the community respiration over a drying period of 27 days, a single rewetting event and a follow-up of three days. Grazer presence stimulated biofilm community respiration (CRmic) in the permanently wet control, but decreased biofilm resistance to desiccation (<0.2% of pre-disturbed activity), regardless of drying intensity. In the absence of grazers, higher atmospheric humidity in moderately drying microcosms resulted in maintaining a film of adhesive water and low CRmic (29% of pre-disturbed respiration) until the end of the drying period. After flow resumption, the CRmic increased within 8 h, achieving 79-83% of pre-disturbed respiration (no grazers) and 15-41% (with grazers), respectively. Results show that short dry periods in temperate streams, even under high humidity, impact the streambed biofilm community negatively. The complex response and strong effect of grazer presence indicates that experiments including interactions of trophic levels and settings mimicking environmental factors during dry-rewet stress are needed.
Collapse
Affiliation(s)
- Anna Oprei
- Department of Freshwater Conservation, BTU-Cottbus Senftenberg, 15526 Bad Saarow, Germany.
| | - Sanja Zlatanović
- Department of Freshwater Conservation, BTU-Cottbus Senftenberg, 15526 Bad Saarow, Germany
| | - Michael Mutz
- Department of Freshwater Conservation, BTU-Cottbus Senftenberg, 15526 Bad Saarow, Germany
| |
Collapse
|
5
|
Jensen CK, McGuire KJ, McLaughlin DL, Scott DT. Quantifying spatiotemporal variation in headwater stream length using flow intermittency sensors. Environ Monit Assess 2019; 191:226. [PMID: 30887248 DOI: 10.1007/s10661-019-7373-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 07/10/2018] [Accepted: 03/07/2019] [Indexed: 05/27/2023]
Abstract
Scientists and policymakers increasingly recognize that headwater regions contain numerous temporary streams that expand and contract in length, but accurately mapping and modeling dynamic stream networks remain a challenge. Flow intermittency sensors offer a relatively new approach to characterize wet stream length dynamics at high spatial and temporal resolutions. We installed 51 flow intermittency sensors at an average spacing of 40 m along the stream network of a high-relief, headwater catchment (33 ha) in the Valley and Ridge of southwest Virginia. The sensors recorded the presence or absence of water every 15 min for 10 months. Calculations of the wet network proportion from sensor data aligned with those from field measurements, confirming the efficacy of flow intermittency sensors. The fine temporal scale of the sensor data showed hysteresis in wet stream length: the wet network proportion was up to 50% greater on the rising limb of storm events than on the falling limb for dry antecedent conditions, at times with a delay of several hours between the maximum wet proportion and peak runoff at the catchment outlet. Less stream length hysteresis was evident for larger storms with higher event and antecedent precipitation that resulted in peak runoff > 15 mm/day. To assess spatial controls on stream wetting and drying, we performed a correlation analysis between flow duration at the sensor locations and common topographic metrics used in stream network modeling. Topography did not fully explain spatial variation in flow duration along the stream network. However, entrenched valleys had longer periods of flow on the rising limbs of events than unconfined reaches. In addition, large upslope contributing areas corresponded to higher flow duration on falling limbs. Future applications that explore the magnitude and drivers of stream length variability may provide further insights into solute and runoff generation processes in headwater regions.
Collapse
Affiliation(s)
- Carrie K Jensen
- Department of Forest Resources and Environmental Conservation (MC 0324), Cheatham Hall, RM 313, Virginia Tech, 310 West Campus Drive, Blacksburg, VA, 24061, USA.
- Virginia Water Resources Research Center (MC 0444), Cheatham Hall, STE 210, Virginia Tech, 310 West Campus Drive, Blacksburg, VA, 24061, USA.
| | - Kevin J McGuire
- Department of Forest Resources and Environmental Conservation (MC 0324), Cheatham Hall, RM 313, Virginia Tech, 310 West Campus Drive, Blacksburg, VA, 24061, USA
- Virginia Water Resources Research Center (MC 0444), Cheatham Hall, STE 210, Virginia Tech, 310 West Campus Drive, Blacksburg, VA, 24061, USA
| | - Daniel L McLaughlin
- Department of Forest Resources and Environmental Conservation (MC 0324), Cheatham Hall, RM 313, Virginia Tech, 310 West Campus Drive, Blacksburg, VA, 24061, USA
- Virginia Water Resources Research Center (MC 0444), Cheatham Hall, STE 210, Virginia Tech, 310 West Campus Drive, Blacksburg, VA, 24061, USA
| | - Durelle T Scott
- Department of Biological Systems Engineering (MC 0303), Seitz Hall, RM 202A, Virginia Tech, 155 Ag Quad Lane, Blacksburg, VA, 24061, USA
| |
Collapse
|
6
|
Smeti E, von Schiller D, Karaouzas I, Laschou S, Vardakas L, Sabater S, Tornés E, Monllor-Alcaraz LS, Guillem-Argiles N, Martinez E, Barceló D, López de Alda M, Kalogianni E, Elosegi A, Skoulikidis N. Multiple stressor effects on biodiversity and ecosystem functioning in a Mediterranean temporary river. Sci Total Environ 2019; 647:1179-1187. [PMID: 30180326 DOI: 10.1016/j.scitotenv.2018.08.105] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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: 06/01/2018] [Revised: 08/07/2018] [Accepted: 08/07/2018] [Indexed: 06/08/2023]
Abstract
The hydrological and biological complexity of temporary rivers as well as their importance in providing goods and services is increasingly recognized, as much as it is the vulnerability of the biotic communities in view of climate change and increased anthropogenic pressures. However, the effects of flow intermittency (resulting from both seasonal variations and rising hydrological pressure) and pollution on biodiversity and ecosystem functioning have been overlooked in these ecosystems. We explore the way multiple stressors affect biodiversity and ecosystem functioning, as well as the biodiversity-ecosystem functioning (B-EF) relationship in a Mediterranean temporary river. We measured diversity of benthic communities (i.e. diatoms and macroinvertebrates) and related ecosystem processes (i.e. resource use efficiency-RUE and organic matter breakdown-OMB) across a pollution and flow intermittency gradient. Our results showed decreases in macroinvertebrate diversity and the opposite trend in diatom assemblages, whereas ecosystem functioning was negatively affected by both pollution and flow intermittency. The explored B-EF relationships showed contrasting results: RUE decreased with higher diatom diversity, whereas OMB increased with increased macroinvertebrate diversity. The different responses suggest contrasting operating mechanisms, selection effects possibly driving the B-EF relationship in diatoms and complementarity effects driving the B-EF relationship in macroinvertebrates. The understanding of multiple stressor effects on diversity and ecosystem functioning, as well as the B-EF relationship in temporary rivers could provide insights on the risks affecting ecosystem functioning under global change.
Collapse
Affiliation(s)
- Evangelia Smeti
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece.
| | - Daniel von Schiller
- Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Ioannis Karaouzas
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Sofia Laschou
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Leonidas Vardakas
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Sergi Sabater
- Catalan Institute for Water Research (ICRA), Scientific and Technologic Park of the University of Girona, Girona, Spain; Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Elisabet Tornés
- Catalan Institute for Water Research (ICRA), Scientific and Technologic Park of the University of Girona, Girona, Spain; Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Luis Simón Monllor-Alcaraz
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Nuria Guillem-Argiles
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Elena Martinez
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Damià Barceló
- Catalan Institute for Water Research (ICRA), Scientific and Technologic Park of the University of Girona, Girona, Spain; Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Miren López de Alda
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Eleni Kalogianni
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Arturo Elosegi
- Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Nikolaos Skoulikidis
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| |
Collapse
|
7
|
Rubio-Gracia F, Almeida D, Bonet B, Casals F, Espinosa C, Flecker AS, García-Berthou E, Martí E, Tuulaikhuu BA, Vila-Gispert A, Zamora L, Guasch H. Combined effects of hydrologic alteration and cyprinid fish in mediating biogeochemical processes in a Mediterranean stream. Sci Total Environ 2017; 601-602:1217-1225. [PMID: 28605839 DOI: 10.1016/j.scitotenv.2017.05.287] [Citation(s) in RCA: 2] [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: 03/31/2017] [Revised: 05/30/2017] [Accepted: 05/31/2017] [Indexed: 06/07/2023]
Abstract
Flow regimes are important drivers of both stream community and biogeochemical processes. However, the interplay between community and biogeochemical responses under different flow regimes in streams is less understood. In this study, we investigated the structural and functional responses of periphyton and macroinvertebrates to different densities of the Mediterranean barbel (Barbus meridionalis, Cyprinidae) in two stream reaches differing in flow regime. The study was conducted in Llémena Stream, a small calcareous Mediterranean stream with high nutrient levels. We selected a reach with permanent flow (permanent reach) and another subjected to flow regulation (regulated reach) with periods of flow intermittency. At each reach, we used in situ cages to generate 3 levels of fish density. Cages with 10 barbels were used to simulate high fish density (>7indm-2); cages with open sides were used as controls (i.e. exposed to actual fish densities of each stream reach) thus having low fish density; and those with no fish were used to simulate the disappearance of fish that occurs with stream drying. Differences in fish density did not cause significant changes in periphyton biomass and macroinvertebrate density. However, phosphate uptake by periphyton was enhanced in treatments lacking fish in the regulated reach with intermittent flow but not in the permanent reach, suggesting that hydrologic alteration hampers the ability of biotic communities to compensate for the absence of fish. This study indicates that fish density can mediate the effects of anthropogenic alterations such as flow intermittence derived from hydrologic regulation on stream benthic communities and associated biogeochemical processes, at least in eutrophic streams.
Collapse
Affiliation(s)
- Francesc Rubio-Gracia
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain.
| | - David Almeida
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Berta Bonet
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Frederic Casals
- Department of Animal Science - Wildlife, University of Lleida, 25198 Lleida, Catalonia, Spain; Forest Sciences Centre of Catalonia (CTFC), 25280 Solsona, Catalonia, Spain
| | - Carmen Espinosa
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Alexander S Flecker
- Department of Ecology and Evolutionary Biology, Cornell University, NY 14853, USA
| | - Emili García-Berthou
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Eugènia Martí
- Integrative Freshwater Ecology Group, Centre d'Estudis Avançats de Blanes, CSIC, Accés a la Cala St. Francesc, 17300 Blanes, Catalonia, Spain
| | - Baigal-Amar Tuulaikhuu
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Anna Vila-Gispert
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Lluis Zamora
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| | - Helena Guasch
- GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Catalonia, Spain
| |
Collapse
|