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Xing Y, Cheng L, Zheng L, Wu H, Tan Q, Wang X, Tian Q. Brownification increases the abundance of microorganisms related to carbon and nitrogen cycling in shallow lakes. ENVIRONMENTAL RESEARCH 2024; 257:119243. [PMID: 38810820 DOI: 10.1016/j.envres.2024.119243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/22/2024] [Accepted: 05/26/2024] [Indexed: 05/31/2024]
Abstract
Brownification in aquatic ecosystems under global change has attracted attention. The composition and quantity of dissolved organic matter transported from various land use types to lakes differ significantly, causing varying ecological effects of lake brownification by region. Bacterial communities make a significant contribution to the material cycle of ecosystems and are sensitive to environmental changes. In this study, a series of mesocosm systems were used to simulate forest lakes and urban lakes with different degrees of brownification, and a high-throughput amplicon sequencing technique was used to explore the changes in the composition, structure, and function of bacterial communities in shallow lakes undergoing brownification. Principal coordinate analysis (PCoA) and Jensen‒Shannon distance typing analysis both indicated significant differences in bacterial communities between forest lakes and urban lakes. The α diversity of bacterial communities in urban lakes increased with the degree of brownification. However, whether forest lakes or urban lakes, brownification increased the abundance of carbon cycling-related bacterial phyla (Proteobacteria, Poribacteria, and Chloroflexi) and nitrogen cycling-related bacterial genera (Microbacteriaceae, Limnohabitans, Comamonadaceae, Bacillus, and Rhizobiales_Incertae_Sedis). Additionally, the carbon and nitrogen cycling functions of bacterial communities in forest lakes are dominant, while those in urban lakes are dominated by functions related to light. Our study has preliminarily revealed that lake brownification promotes the growth of carbon and nitrogen cycling microorganisms, providing a new paradigm for understanding the response of lake ecosystems in different catchment areas to environmental changes and the carbon and nitrogen cycling processes in shallow lake ecosystems.
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Affiliation(s)
- Yuzi Xing
- College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Lirong Cheng
- College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Lei Zheng
- College of Water Science, Beijing Normal University, Beijing, 100875, China.
| | - Haoming Wu
- College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Qiuyang Tan
- College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Xue Wang
- College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Qi Tian
- College of Water Science, Beijing Normal University, Beijing, 100875, China
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2
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Setash CM, Behney AC, Gammonley JH, Koons DN. Riding the wetland wave: Can ducks locate macroinvertebrate resources across the breeding season? Ecol Evol 2024; 14:e11568. [PMID: 38932948 PMCID: PMC11199343 DOI: 10.1002/ece3.11568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Food availability varies considerably over space and time in wetland systems, and consumers must be able to track those changes during energetically-demanding points in the life cycle like breeding. Resource tracking has been studied frequently among herbivores, but receives less attention among consumers of macroinvertebrates. We evaluated the change in resource availability across habitat types and time and the simultaneous density of waterfowl consumers throughout their breeding season in a high-elevation, flood-irrigated system. We also assessed whether the macroinvertebrate resource density better predicted waterfowl density across habitats, compared to consistency (i.e., temporal evenness) of the invertebrate resource or taxonomic richness. Resource density varied marginally across wetland types but was highest in basin wetlands (i.e., ponds) and peaked early in the breeding season, whereas it remained relatively low and stable in other wetland habitats. Breeding duck density was positively related to resource density, more so than temporal resource stability, for all species. Resource density was negatively related to duckling density, however. These results have the potential to not only elucidate mechanisms of habitat selection among breeding ducks in flood-irrigated landscapes but also suggest there is not a consequential trade-off to selecting wetland sites based on energy density versus temporal resource stability and that good-quality wetland sites provide both.
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Affiliation(s)
- Casey M. Setash
- Colorado Parks and WildlifeFort CollinsColoradoUSA
- Department of Fish, Wildlife, and Conservation BiologyColorado State UniversityFort CollinsColoradoUSA
| | | | | | - David N. Koons
- Department of Fish, Wildlife, and Conservation BiologyColorado State UniversityFort CollinsColoradoUSA
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3
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Lee Y, Kim DH, Lee JS, Kim HS, Maszczyk P, Wang M, Yang Z, Wang DZ, Lee JS. Combined exposure to hypoxia and nanoplastics leads to negative synergistic oxidative stress-mediated effects in the water flea Daphnia magna. MARINE POLLUTION BULLETIN 2024; 202:116306. [PMID: 38574500 DOI: 10.1016/j.marpolbul.2024.116306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
In this study, we investigated the combined effects of hypoxia and NPs on the water flea Daphnia magna, a keystone species in freshwater environments. To measure and understand the oxidative stress responses, we used acute toxicity tests, fluorescence microscopy, enzymatic assays, Western blot analyses, and Ingenuity Pathway Analysis. Our findings demonstrate that hypoxia and NPs exhibit a negative synergy that increases oxidative stress, as indicated by heightened levels of reactive oxygen species and antioxidant enzyme activity. These effects lead to more severe reproductive and growth impairments in D. magna compared to a single-stressor exposure. In this work, molecular investigations revealed complex pathway activations involving HIF-1α, NF-κB, and mitogen-activated protein kinase, illustrating the intricate molecular dynamics that can occur in combined stress conditions. The results underscore the amplified physiological impacts of combined environmental stressors and highlight the need for integrated strategies in the management of aquatic ecosystems.
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Affiliation(s)
- Yoseop Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Duck-Hyun Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jin-Sol Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, South Korea
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, South Korea
| | - Piotr Maszczyk
- Department of Hydrobiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Minghua Wang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Zhou Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Da-Zhi Wang
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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4
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Holopainen S, Jaatinen K, Laaksonen T, Lindén A, Nummi P, Piha M, Pöysä H, Toivanen T, Väänänen V, Alhainen M, Lehikoinen A. Anthropogenic bottom-up and top-down impacts on boreal breeding waterbirds. Ecol Evol 2024; 14:e11136. [PMID: 38469038 PMCID: PMC10925514 DOI: 10.1002/ece3.11136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 12/12/2023] [Accepted: 12/21/2023] [Indexed: 03/13/2024] Open
Abstract
Wetland habitats are changing under multiple anthropogenic pressures. Nutrient leakage and pollution modify physico-chemical state of wetlands and affect the ecosystem through bottom-up processes, while alien predators affect the ecosystems in a top-down manner. Boreal wetlands are important breeding areas for several waterbird species, the abundances of which potentially reflect both bottom-up and top-down ecosystem processes. Here, we use long-term national monitoring data gathered from c. 130 waterbird breeding sites in Finland from the 1980s to the 2020s. We hypothesised that the physico-chemical state of the waters and increasing alien predator abundance both play a role in steering the waterbird population trends. We set out to test this hypothesis by relating population changes of 17 waterbird species to changes in water chemistry and to regional alien predator indices while allowing species-specific effects to vary with foraging niche (dabblers, invertivore divers, piscivorous divers, herbivores), nesting site, female mass and habitat (oligotrophic, eutrophic). We found niche and nesting site-specific, habitat-dependent changes in waterbird numbers. While the associations with higher phosphorus levels and browning water were in overall positive at the oligotrophic lakes, the numbers of invertivore and piscivore diving ducks were most strongly negatively associated with higher phosphorus levels and browning water at the eutrophic lakes. Furthermore, increased pH levels benefitted piscivores. Invertivore diving duck species nesting on the wetlands had declined most on sites with high alien predator indices. Large herbivorous species and species preferring oligotrophic lakes seem to be successful. We conclude that the large-scale breeding waterbird decline in Finland is closely connected to both bottom-up and top-down processes, where negative associations are emphasised especially at eutrophic lakes. Niche-, nest site- and habitat-specific management actions are required to conserve declining waterbird populations. Managing wetlands on catchments level together with alien predator control may provide important approaches to future wetland management.
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Affiliation(s)
- Sari Holopainen
- Luonnontieteellinen Keskusmuseo, Finnish Museum of Natural HistoryUniversity of HelsinkiHelsinkiFinland
- Present address:
Department of Forest SciencesUniversity of HelsinkiHelsinkiFinland
| | - Kim Jaatinen
- Nature and Game Management Trust FinlandDegerbyFinland
| | | | | | - Petri Nummi
- Department of Forest SciencesUniversity of HelsinkiHelsinkiFinland
| | - Markus Piha
- Natural Resources Institute Finland LukeHelsinkiFinland
| | - Hannu Pöysä
- Natural Resources Institute Finland LukeJoensuuFinland
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
| | | | | | | | - Aleksi Lehikoinen
- Luonnontieteellinen Keskusmuseo, Finnish Museum of Natural HistoryUniversity of HelsinkiHelsinkiFinland
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Turunen J, Aroviita J. Influence of water color and catchment lake cover on stream macroinvertebrate communities: Ecological insights into browning effects. WATER RESEARCH 2024; 250:121048. [PMID: 38157603 DOI: 10.1016/j.watres.2023.121048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/10/2023] [Accepted: 12/20/2023] [Indexed: 01/03/2024]
Abstract
Browning of streams due to increased export of dissolved organic carbon (DOC) and iron has been observed in vast areas of the northern hemisphere with likely adverse ecological effects. Lake basins in stream catchments can moderate DOC export and influence stream communities, which complicates understanding of the effects of DOC. In this study, we explored the independent and interactive effects of water color (proxy for DOC and iron) and catchment lake cover on benthic macroinvertebrate communities in 94 medium-sized boreal forest streams. We first investigated the role of lake basins and other catchment characteristics in controlling water color. We then studied the effects of water color and catchment lake cover on macroinvertebrate community composition, biodiversity, and functional feeding traits. Water color correlated negatively with catchment lake cover, whereas the correlation with peatland cover and drainage intensity was positive. PERMANOVA and GLS analyses indicated that both color and catchment lake cover had a distinct independent effect on invertebrate community composition and community attributes, without significant interactions. Color had an independent negative effect on EPT (Ephemeroptera, Plecoptera, Trichoptera) taxa richness irrespective of lake cover. Increasing water color had negative effect on relative abundance of grazer, but no significant effect on shredder trait, while lake cover had a negative effect on both of the traits. Lake cover exhibited a negative influence on collector-gatherers, and a positive effect on filter feeders, while the predators were positively affected by both factors. The results highlight that water color influences the community structure of boreal stream ecosystems, and the effects are similar regardless of catchment lake cover. Mitigation measures should be emphasized, aimed at reducing DOC and iron runoff, in land use planning and river basin management.
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Affiliation(s)
- Jarno Turunen
- Marine and Freshwater Solutions, Finnish Environment Institute, PO Box 413, Oulu 90014, Finland.
| | - Jukka Aroviita
- Marine and Freshwater Solutions, Finnish Environment Institute, PO Box 413, Oulu 90014, Finland
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6
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Rankinen K, Junttila V, Futter M, Cano Bernal JE, Butterfield D, Holmberg M. Quantification of the effect of environmental changes on the brownification of Lake Kukkia in southern Finland. AMBIO 2023; 52:1834-1846. [PMID: 37733219 PMCID: PMC10562317 DOI: 10.1007/s13280-023-01911-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 05/31/2023] [Accepted: 07/27/2023] [Indexed: 09/22/2023]
Abstract
The browning of surface waters due to the increased terrestrial loading of dissolved organic carbon is observed across the northern hemisphere. Brownification is often explained by changes in large-scale anthropogenic pressures (including acidification, and climate and land-use changes). We quantified the effect of environmental changes on the brownification of an important lake for birds, Kukkia in southern Finland. We studied the past trends of organic carbon loading from catchments based on observations taken since the 1990s. We created hindcasting scenarios for deposition, climate and land-use change in order to simulate their quantitative effect on brownification by using process-based models. Changes in forest cuttings were shown to be the primary reason for the brownification. According to the simulations, a decrease in deposition has resulted in a slightly lower leaching of total organic carbon (TOC). In addition, runoff and TOC leaching from terrestrial areas to the lake was smaller than it would have been without the observed increasing trend in temperature by 2 °C in 25 years.
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Affiliation(s)
- Katri Rankinen
- Finnish Environment Institute, Latokartanonkaari 11, 00790 Helsinki, Finland
| | - Virpi Junttila
- Finnish Environment Institute, Latokartanonkaari 11, 00790 Helsinki, Finland
| | - Martyn Futter
- Swedish University of Agricultural Sciences, P.O. Box 7070, 750 07 Uppsala, Sweden
| | | | | | - Maria Holmberg
- Finnish Environment Institute, Latokartanonkaari 11, 00790 Helsinki, Finland
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7
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Strandberg U, Arhonditsis G, Kesti P, Vesterinen J, Vesamäki JS, Taipale SJ, Kankaala P. Environmental drivers alter PUFA content in littoral macroinvertebrate assemblages via changes in richness and abundance. AQUATIC SCIENCES 2023; 85:100. [PMID: 37663589 PMCID: PMC10471644 DOI: 10.1007/s00027-023-00996-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 08/04/2023] [Indexed: 09/05/2023]
Abstract
Shallow littoral areas in lakes are productive and highly diverse ecotonal zones, providing habitats for both invertebrate and vertebrate species. We developed a Bayesian modeling framework to elucidate the relationships between environmental drivers (lake typology, habitat, water chemistry, and latitude) and taxon richness, abundance, as well as the content of polyunsaturated fatty acids (PUFAs) in littoral macroinvertebrate communities in 95 boreal lakes. PUFAs, particularly arachidonic acid (ARA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA), are critical micronutrients to maintain normal physiological functions in consumers. Lake typology was a significant predictor for PUFA content in the invertebrate assemblages, which was connected to taxon richness and/or abundance. Benthic communities in large humus-poor or nutrient-rich lakes displayed higher abundance, taxon richness, and more PUFA-rich taxa, whereas those in medium- and large-sized humic (color 30-90 mg Pt/L) and humus-rich lakes (color >90 mg Pt/L) were characterized by decreased abundance and subsequently low PUFA content. The abundance, taxon richness, and nutritional quality of the communities were also strongly related to latitude. Lakes with lower pH were characterized by lower benthic invertebrate diversity and low frequency of taxa with high somatic EPA and DHA content. The complexity of littoral habitats dominated by various macrophyte assemblages creates an environment that favors higher benthic abundance and increased presence of taxonomic groups with high PUFA content. Nutritional quality of benthic invertebrates for upper trophic levels can be modulated by a complex interplay between external stressors and abiotic factors that typically shape the structure of littoral benthic communities. Supplementary Information The online version contains supplementary material available at 10.1007/s00027-023-00996-2.
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Affiliation(s)
- Ursula Strandberg
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - George Arhonditsis
- Department of Physical and Environmental Sciences, University of Toronto, Toronto, Canada
| | - Petri Kesti
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Jussi Vesterinen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
- The Association for Water and Environment of Western Uusimaa, Lohja, Finland
| | - Jussi S. Vesamäki
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Sami J. Taipale
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Paula Kankaala
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
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Spilling K, Asmala E, Haavisto N, Haraguchi L, Kraft K, Lehto AM, Lewandowska AM, Norkko J, Piiparinen J, Seppälä J, Vanharanta M, Vehmaa A, Ylöstalo P, Tamminen T. Brownification affects phytoplankton community composition but not primary productivity in eutrophic coastal waters: A mesocosm experiment in the Baltic Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 841:156510. [PMID: 35700777 DOI: 10.1016/j.scitotenv.2022.156510] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
Climate change is projected to cause brownification of some coastal seas due to increased runoff of terrestrially derived organic matter. We carried out a mesocosm experiment (15 d) to test the effect of this on the planktonic ecosystem expecting reduced primary production and shifts in the phytoplankton community composition. The experiment was set up in 2.2 m3 mesocosm bags using four treatments, each with three replicates: control (Contr) without any manipulation, organic carbon additive HuminFeed (Hum; 2 mg L-1), inorganic nutrients (Nutr; 5.7 μM NH4 and 0.65 μM PO4), and combined Nutr and Hum (Nutr + Hum) additions. Measured variables included organic and inorganic nutrient pools, chlorophyll a (Chla), primary and bacterial production and particle counts by flow cytometry. The bags with added inorganic nutrients developed a phytoplankton bloom that depleted inorganic N at day 6, followed by a rapid decline in Chla. Brownification did not reduce primary production at the tested concentration. Bacterial production was lowest in the Contr, but similar in the three treatments receiving additions likely due to increased carbon available for heterotrophic bacteria. Picoeukaryotes clearly benefited by brownification after inorganic N depletion, which could be due to more effective nutrient recycling, nutrient affinity, light absorption, or alternatively lower grazing pressure. In conclusion, brownification shifted the phytoplankton community composition towards smaller species with potential effects on carbon fluxes, such as sinking rates and export to the sea floor.
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Affiliation(s)
- Kristian Spilling
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland; Centre for Coastal Research, University of Agder, Kristiansand, Norway.
| | - Eero Asmala
- Tvärminne Zoological Station, University of Helsinki, Hanko, Finland; Geological Survey of Finland, Espoo, Finland
| | - Noora Haavisto
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | - Lumi Haraguchi
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | - Kaisa Kraft
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | - Anne-Mari Lehto
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | | | - Joanna Norkko
- Tvärminne Zoological Station, University of Helsinki, Hanko, Finland
| | - Jonna Piiparinen
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | - Jukka Seppälä
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | - Mari Vanharanta
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland; Tvärminne Zoological Station, University of Helsinki, Hanko, Finland
| | - Anu Vehmaa
- Tvärminne Zoological Station, University of Helsinki, Hanko, Finland
| | - Pasi Ylöstalo
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
| | - Timo Tamminen
- Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
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Vargas AL, Santangelo JM, Bozelli RL. Hatching under brownification: DOC-mediated changes in physical, but not chemical properties of water affect hatching patterns of Cladocera resting eggs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:64124-64131. [PMID: 35471758 DOI: 10.1007/s11356-022-19864-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
Dissolved organic carbon (DOC) is often related to the brownification of water in continental aquatic systems and to changes in the physiology of zooplankton organisms. Zooplankton resting eggs are particularly sensitive to changes in light and chemical characteristics of water, but the physical and chemical effects associated to DOC on dormant stages have never been tested before. Herein, we tested how DOC affects hatching rates and time to hatching of Cladocera (Diaphanosoma birgei) resting eggs. In order to analyze the chemical (i.e., toxic) and physical (i.e., light attenuation) effects of DOC on hatching patterns, resting eggs were exposed to different concentrations of DOC (0, 50, and 100 mg L-1) in an experimental design which isolated chemical from physical effects. When evaluating the physical effects of DOC, hatching was more than 150% less in 100 than 50 mg L-1 DOC and time to hatching was 66% lesser in 50 mg L-1 DOC than control. Hatchling numbers and time to hatching were not affected by DOC chemical effects. We conclude DOC effects on hatching mainly relied on light attenuation, while chemical effects were likely of minor importance. DOC may change Cladocera emergence patterns mainly through light attenuation in the water column.
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Affiliation(s)
- Anderson L Vargas
- Laboratório de Limnologia, Departamento de Ecologia, Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
| | - Jayme M Santangelo
- Departamento de Ciências Ambientais, Universidade Federal Rural Do Rio de Janeiro (UFRRJ), Seropédica, Brazil
| | - Reinaldo L Bozelli
- Laboratório de Limnologia, Departamento de Ecologia, Universidade Federal Do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
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Holopainen S, Čehovská M, Jaatinen K, Laaksonen T, Lindén A, Nummi P, Piha M, Pöysä H, Toivanen T, Väänänen VM, Lehikoinen A. A rapid increase of large-sized waterfowl does not explain the population declines of small-sized waterbird at their breeding sites. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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11
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Blanchet CC, Arzel C, Davranche A, Kahilainen KK, Secondi J, Taipale S, Lindberg H, Loehr J, Manninen-Johansen S, Sundell J, Maanan M, Nummi P. Ecology and extent of freshwater browning - What we know and what should be studied next in the context of global change. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:152420. [PMID: 34953836 DOI: 10.1016/j.scitotenv.2021.152420] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/10/2021] [Accepted: 12/11/2021] [Indexed: 06/14/2023]
Abstract
Water browning or brownification refers to increasing water color, often related to increasing dissolved organic matter (DOM) and carbon (DOC) content in freshwaters. Browning has been recognized as a significant physicochemical phenomenon altering boreal lakes, but our understanding of its ecological consequences in different freshwater habitats and regions is limited. Here, we review the consequences of browning on different freshwater habitats, food webs and aquatic-terrestrial habitat coupling. We examine global trends of browning and DOM/DOC, and the use of remote sensing as a tool to investigate browning from local to global scales. Studies have focused on lakes and rivers while seldom addressing effects at the catchment scale. Other freshwater habitats such as small and temporary waterbodies have been overlooked, making the study of the entire network of the catchment incomplete. While past research investigated the response of primary producers, aquatic invertebrates and fishes, the effects of browning on macrophytes, invasive species, and food webs have been understudied. Research has focused on freshwater habitats without considering the fluxes between aquatic and terrestrial habitats. We highlight the importance of understanding how the changes in one habitat may cascade to another. Browning is a broader phenomenon than the heretofore concentration on the boreal region. Overall, we propose that future studies improve the ecological understanding of browning through the following research actions: 1) increasing our knowledge of ecological processes of browning in other wetland types than lakes and rivers, 2) assessing the impact of browning on aquatic food webs at multiple scales, 3) examining the effects of browning on aquatic-terrestrial habitat coupling, 4) expanding our knowledge of browning from the local to global scale, and 5) using remote sensing to examine browning and its ecological consequences.
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Affiliation(s)
- Clarisse C Blanchet
- Department of Biology, FI-20014, University of Turku, Finland; Department of Forest Sciences, P.O. Box 27, University of Helsinki, FI-00014 Helsinki, Finland.
| | - Céline Arzel
- Department of Biology, FI-20014, University of Turku, Finland
| | - Aurélie Davranche
- CNRS UMR 6554 LETG, University of Angers, 2 Boulevard Lavoisier, FR-49000 Angers, France
| | - Kimmo K Kahilainen
- University of Helsinki, Lammi Biological Station, Pääjärventie 320, FI-16900 Lammi, Finland
| | - Jean Secondi
- University of Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France; Faculty of Sciences, University of Angers, F-49000 Angers, France
| | - Sami Taipale
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Henrik Lindberg
- HAMK University of Applied Sciences, Forestry Programme, Saarelantie 1, FI-16970 Evo, Finland
| | - John Loehr
- University of Helsinki, Lammi Biological Station, Pääjärventie 320, FI-16900 Lammi, Finland
| | | | - Janne Sundell
- University of Helsinki, Lammi Biological Station, Pääjärventie 320, FI-16900 Lammi, Finland
| | - Mohamed Maanan
- UMR CNRS 6554, University of Nantes, F-44000 Nantes, France
| | - Petri Nummi
- Department of Forest Sciences, P.O. Box 27, University of Helsinki, FI-00014 Helsinki, Finland
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Holopainen S, Lehikoinen A. Role of forest ditching and agriculture on water quality: Connecting the long-term physico-chemical subsurface state of lakes with landscape and habitat structure information. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151477. [PMID: 34742977 DOI: 10.1016/j.scitotenv.2021.151477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Increasing anthropogenic pressures have affected the status of surface freshwater ecosystems. Eutrophication, water browning, acidification, and several other processes may be channelled through the food web. In this study, we evaluate the role of hydrology impacting anthropogenic pressures, flows from urban, farmland and ditched forest areas, and how they explain the physico-chemical quality of lakes and ponds in the boreal biome of Finland. We study the long-term effect around 445 waterfowl survey sites that had physico-chemical measurements (total phosphorus, total nitrogen, pH, water clarity and colour) produced by Finnish environmental authorities done in years 1986-2020. Furthermore, we investigate whether a long-term national-level citizen science study focusing on rather robust visible habitat structures measured by the volunteers can reveal physico-chemical water quality using data from >270 lakes where the waterfowl habitat survey and physico-chemical measurements could be spatio-temporally matched. Farmland occurrence around the lakes was positively associated with pH, colour and nutrient concentrations but negatively associated with water clarity. Furthermore, ditch length was positively associated with nitrogen concentration and water colour, while being negatively associated with pH and water clarity. Overall, the studied lakes showed a negative trend in nutrients and clarity but a positive trend in pH and colour. As expected, nutrient concentration increased and clarity decreased along the gradient from oligotrophic to eutrophic lake habitat classifications, which suggests that the citizen science classification seem to reflect the subsurface physico-chemical status of the lakes. We conclude that farming and forest ditching practices in particular seem to associate with the state of the study lakes and that the ecological impacts of intensified turbidity and brownification in wetland ecosystems should be studied further in the future. Sustainable improvement of water quality rests upon scientific understanding of biogeochemical processes in lake ecosystems and the primary sources of the nutrient and sediment loading.
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Affiliation(s)
- Sari Holopainen
- LUOMUS - Finnish Museum of Natural History, P.O. Box 17, University of Helsinki, FI-00014 Helsinki, Finland.
| | - Aleksi Lehikoinen
- LUOMUS - Finnish Museum of Natural History, P.O. Box 17, University of Helsinki, FI-00014 Helsinki, Finland
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Andersen LH, Nummi P, Rafn J, Frederiksen CMS, Kristjansen MP, Lauridsen TL, Trøjelsgaard K, Pertoldi C, Bruhn D, Bahrndorff S. Can reed harvest be used as a management strategy for improving invertebrate biomass and diversity? JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 300:113637. [PMID: 34521006 DOI: 10.1016/j.jenvman.2021.113637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 08/12/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
The succession-driven reed bed habitat hosts a unique flora and fauna including several endangered invertebrate species. Reed beds can be managed through commercial winter harvest, with implications for reed bed conservation. However, the effects of winter harvest on the invertebrate community are not well understood and vary across studies and taxonomic levels. The aim of this study was to investigate the effects of reed harvest on invertebrate communities. Ground-dwelling and aerial invertebrates were continuously sampled for 10 weeks in the largest coherent reed bed of Scandinavia in order to assess how time since last reed harvest (0, 3, and 25-years) influences invertebrate biomass, biodiversity and community structure across taxonomic levels. Biomass was measured and all specimens were sorted to order level, and Coleoptera was even sorted to species level. The invertebrate community showed distinct compositional differences across the three reed bed ages. Furthermore, biomass of both aerial and ground-dwelling invertebrates was highest in the age-0 reed bed and lowest in the age-25 reed bed. Generally, biodiversity showed an opposite trend with the highest richness and diversity in the age-25 reed bed. We conclude that it is possible to ensure high insect biomass and diversity by creating a mosaic of reed bed of different ages through small-scale harvest in the largest coherent reed bed in Scandinavia. The youngest red beds support a high invertebrate biomass whereas the oldest reed beds support a high biodiversity. Collectively, this elevate our understanding of reed harvest and the effects it has on the invertebrate communities, and might aid in future reed bed management and restoration.
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Affiliation(s)
- Line Holm Andersen
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark.
| | - Petri Nummi
- Department of Forest Sciences, University of Helsinki, Viikinkaari 1, Biocentre 3, 00790, Helsinki, Finland
| | - Jeppe Rafn
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark
| | | | - Mads Prengel Kristjansen
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark
| | | | - Kristian Trøjelsgaard
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark
| | - Cino Pertoldi
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark; Aalborg Zoo, Mølleparkvej 63, 9000, Aalborg, Denmark
| | - Dan Bruhn
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark
| | - Simon Bahrndorff
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bajers Vej 7H, 9220, Aalborg, Denmark
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