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Kotamäki N, Arhonditsis G, Hjerppe T, Hyytiäinen K, Malve O, Ovaskainen O, Paloniitty T, Similä J, Soininen N, Weigel B, Heiskanen AS. Strategies for integrating scientific evidence in water policy and law in the face of uncertainty. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172855. [PMID: 38692324 DOI: 10.1016/j.scitotenv.2024.172855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/22/2024] [Accepted: 04/26/2024] [Indexed: 05/03/2024]
Abstract
Understanding how human actions and environmental change affect water resources is crucial for addressing complex water management issues. The scientific tools that can produce the necessary information are ecological indicators, referring to measurable properties of the ecosystem state; environmental monitoring, the data collection process that is required to evaluate the progress towards reaching water management goals; mathematical models, linking human disturbances with the ecosystem state to predict environmental impacts; and scenarios, assisting in long-term management and policy implementation. Paradoxically, despite the rapid generation of data, evolving scientific understanding, and recent advancements in systems modeling, there is a striking imbalance between knowledge production and knowledge utilization in decision-making. In this paper, we examine the role and potential capacity of scientific tools in guiding governmental decision-making processes and identify the most critical disparities between water management, policy, law, and science. We demonstrate how the complex, uncertain, and gradually evolving nature of scientific knowledge might not always fit aptly to the legislative and policy processes and structures. We contend that the solution towards increased understanding of socio-ecological systems and reduced uncertainty lies in strengthening the connections between water management theory and practice, among the scientific tools themselves, among different stakeholders, and among the social, economic, and ecological facets of water quality management, law, and policy. We conclude by tying in three knowledge-exchange strategies, namely - adaptive management, Driver-Pressure-Status-Impact-Response (DPSIR) framework, and participatory modeling - that offer complementary perspectives to bridge the gap between science and policy.
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Affiliation(s)
- Niina Kotamäki
- Finnish Environment Institute, Survontie 9A, FI-40500 Jyväskylä, Finland.
| | - George Arhonditsis
- Department of Physical & Environmental Sciences, University of Toronto, Ontario M1C1A4, Canada
| | - Turo Hjerppe
- Ministry of the Environment, P.O. Box 35, 00023 Government, Finland
| | - Kari Hyytiäinen
- Faculty of Agriculture and Forestry, P.O. Box 27, FI-00014, University of Helsinki, Finland
| | - Olli Malve
- Finnish Environment Institute, Latokartanonkaari 11, FI-00790 Helsinki, Finland
| | - Otso Ovaskainen
- Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland; Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, Helsinki 00014, Finland; Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Tiina Paloniitty
- University of Helsinki, Faculty of Law, P.O. Box 4, FI-00014, Finland
| | - Jukka Similä
- University of Lapland, Faculty of Law, Yliopistonkatu 8, FI-96300 Rovaniemi, Finland
| | - Niko Soininen
- Law School, Center for Climate Change, Energy, and Environmental Law, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
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Cashel FS, Knightes CD, Lupo C, Iott T, Streich K, Conville CJ, Bridges TW, Dombroski I. Using monitoring and mechanistic modeling to improve understanding of eutrophication in a shallow New England estuary. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 355:120478. [PMID: 38432011 PMCID: PMC11091823 DOI: 10.1016/j.jenvman.2024.120478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 02/12/2024] [Accepted: 02/20/2024] [Indexed: 03/05/2024]
Abstract
Anthropogenic nutrient loading has resulted in eutrophication and habitat degradation within estuaries. Study of eutrophication in estuaries has often focused on larger systems, while there has been increasing interest in understanding the governing processes in smaller systems. In this study, we incorporate both monitoring data and mechanistic modeling to improve our understanding of eutrophication in a small, shallow New England estuary. High-frequency continuous and discrete water quality samples were collected from 2018 to 2020 along a salinity gradient and at varying depth to provide temporal and spatial resolution of the system. Conditions of this estuary were simulated using the Hydrological Simulation Program - FORTRAN (HSPF) and the Water Quality Analysis Simulation Program (WASP) to develop a mechanistic, numerical fate and transport model. Our findings suggest complex hydrodynamics with three distinct salinity gradients and variability in salinity concentration upstream. Simulated and observed nutrient trends demonstrated decreasing total nitrogen concentration moving downstream and low total phosphorus concentration throughout the system. Simulated nutrient depletion and shading via macroalgae suggest their importance in similar modeling initiatives. Dynamic spatiotemporal variability in dissolved oxygen concentrations ([DO]) resulted from hydrodynamic and ecological processes such as large, rapid swings in phytoplankton. Carbonaceous biological oxygen demand was suggested to be the driver of hypoxia in surface waters, while sediment oxygen demand may drive low [DO] in the stratified, benthic waters. These findings suggest that the coordination of monitoring and modeling was important to understanding the governing mechanisms of eutrophication and hypoxia. Insights from this study could be used to support regional management strategies to increase [DO], improve water clarity, and recover indigenous seagrass beds. This work has the potential to inform future study and management of small, complex estuaries.
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Affiliation(s)
- Finnian S Cashel
- Oak Ridge Institute for Science and Education Fellow, United States Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement & Modeling, Atlantic Coastal Environmental Sciences Division, 27 Tarzwell Drive, Narragansett, RI, 02882, USA.
| | - Christopher D Knightes
- United States Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement & Modeling, Atlantic Coastal Environmental Sciences Division, 27 Tarzwell Drive, Narragansett, RI, 02882, USA.
| | - Chris Lupo
- RESPEC, 3825 Jet Dr, Rapid City, SD, 57703, USA.
| | - Traci Iott
- Connecticut Department of Energy and Environmental Protection, Bureau of Water Protection and Land Reuse, 79 Elm Street, Hartford, CT, 06106, USA.
| | - Kelly Streich
- Connecticut Department of Energy and Environmental Protection, Bureau of Water Protection and Land Reuse, 79 Elm Street, Hartford, CT, 06106, USA.
| | - Corey J Conville
- United States Environmental Protection Agency, Region 1, Laboratory Sciences and Applied Science Divisions, 11 Technology Drive, North Chelmsford, MA, 01863, USA.
| | - Timothy W Bridges
- United States Environmental Protection Agency, Region 1, Laboratory Sciences and Applied Science Divisions, 11 Technology Drive, North Chelmsford, MA, 01863, USA.
| | - Ian Dombroski
- United States Environmental Protection Agency, Region 1, Water Division, 5 Post Office Square, Suite 100, Boston, MA, 02109, USA.
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Brockmann S, Finnoff D, Boucher N, Mason DM, Rutherford ES, Zhang H. Valuing bioeconomic impacts of regulation on nutrient loads mediated by invasive mussels in Lake Michigan. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 347:119044. [PMID: 37797508 DOI: 10.1016/j.jenvman.2023.119044] [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: 05/28/2023] [Revised: 09/15/2023] [Accepted: 09/17/2023] [Indexed: 10/07/2023]
Abstract
Current calls to correct the perturbed ecosystems and nutrient imbalances of the Laurentian Great Lakes focus on setting target nutrient levels that will be met by environmental and economic regulations to reduce the flow of excess nutrients into the lakes. While these standard types of regulations have been successful in the past, it is unclear whether they will achieve similar ecological and economic successes now amid possible ecosystem regime shifts triggered by invasive mussels. We compute the bioeconomic costs and benefits of hypothetical regulations designed to target nutrient loads in present-day Lake Michigan through agricultural operations, which are known to be nonpoint source polluters of the aquatic ecosystem network. Our results show how reducing nutrient loads may exacerbate spatially disparate ecosystem issues that generate overall economic losses. Conversely, and counterintuitively, allowing for more nutrient loading could generate economic gains over our assessment timeframe. We determine that implementation of standard nutrient target policies are costly and likely inadequate for current dreissenid-affected aquatic ecosystems experiencing nutrient imbalances because they disregard the interactive role of invasive mussels in nutrient cycling.
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Affiliation(s)
- Stephanie Brockmann
- Department of Economics, University of New Hampshire, Durham, NH, 03824, USA.
| | - David Finnoff
- Department of Economics, University of Wyoming, Laramie, WY, 82071, USA
| | - Nicholas Boucher
- The Cooperative Institute for Great Lakes Research, Ann Arbor, MI, 48109, USA
| | - Doran M Mason
- Great Lakes Environmental Research Laboratory, National Ocean and Atmospheric Administration, Ann Arbor, MI, 48108, USA
| | - Edward S Rutherford
- Great Lakes Environmental Research Laboratory, National Ocean and Atmospheric Administration, Ann Arbor, MI, 48108, USA
| | - Hongyan Zhang
- Eureka Aquatic Research, LLC, Ann Arbor, MI, 48108, USA
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4
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Mihhels K, Yousefi N, Blomster J, Solala I, Solhi L, Kontturi E. Assessment of the Alga Cladophora glomerata as a Source for Cellulose Nanocrystals. Biomacromolecules 2023; 24:4672-4679. [PMID: 37729475 PMCID: PMC10646933 DOI: 10.1021/acs.biomac.3c00380] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 09/08/2023] [Indexed: 09/22/2023]
Abstract
Nanocellulose is isolated from cellulosic fibers and exhibits many properties that macroscale cellulose lacks. Cellulose nanocrystals (CNCs) are a subcategory of nanocellulose made of stiff, rodlike, and highly crystalline nanoparticles. Algae of the order Cladophorales are the source of the longest cellulosic nanocrystals, but manufacturing these CNCs is not well-studied. So far, most publications have focused on the applications of this material, with the basic manufacturing parameters and material properties receiving little attention. In this article, we investigate the entirety of the current manufacturing process from raw algal biomass (Cladophora glomerata) to the isolation of algal cellulose nanocrystals. Yields and cellulose purities are investigated for algal cellulose and the relevant process intermediates. Furthermore, the effect of sulfuric acid hydrolysis, which is used to convert cellulose into CNCs and ultimately determines the material properties and some of the sustainability aspects, is examined and compared to literature results on wood cellulose nanocrystals. Long (>4 μm) CNCs form a small fraction of the overall number of CNCs but are still present in measurable amounts. The results define essential material properties for algal CNCs, simplifying their future use in functional cellulosic materials.
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Affiliation(s)
- Karl Mihhels
- Department
of Bioproducts and Biosystems, Aalto-University,
School of Chemical Engineering, 02150 Espoo, Finland
| | - Neptun Yousefi
- Department
of Bioproducts and Biosystems, Aalto-University,
School of Chemical Engineering, 02150 Espoo, Finland
| | - Jaanika Blomster
- Ecosystems
and Environment Research Program, Faculty of Biological and Environmental
Sciences, University of Helsinki, 00014 Helsinki, Finland
| | - Iina Solala
- Department
of Bioproducts and Biosystems, Aalto-University,
School of Chemical Engineering, 02150 Espoo, Finland
| | - Laleh Solhi
- Department
of Bioproducts and Biosystems, Aalto-University,
School of Chemical Engineering, 02150 Espoo, Finland
| | - Eero Kontturi
- Department
of Bioproducts and Biosystems, Aalto-University,
School of Chemical Engineering, 02150 Espoo, Finland
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5
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Prazukin AV, Anufriieva EV, Shadrin NV. WITHDRAWN: Unlimited possibilities to use Сladophora (Chlorophyta, Ulvophyceae, Cladophorales) biomass in agriculture and aquaculture with profit for the environment and humanity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 884:163894. [PMID: 37146795 DOI: 10.1016/j.scitotenv.2023.163894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/13/2023] [Accepted: 04/27/2023] [Indexed: 05/07/2023]
Abstract
This article has been withdrawn: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/policies/article-withdrawal). This article has been withdrawn at the request of the Publisher for legal reasons related to Elsevier's policy on Geographic Sanctions (https://www.elsevier.com/about/policies/trade-sanctions).
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Affiliation(s)
- Alexander V Prazukin
- A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, 2 Nakhimov ave., 299011 Sevastopol, Russia
| | - Elena V Anufriieva
- A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, 2 Nakhimov ave., 299011 Sevastopol, Russia.
| | - Nickolai V Shadrin
- A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, 2 Nakhimov ave., 299011 Sevastopol, Russia
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6
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Wang Y, Zhou P, Zhou W, Huang S, Peng C, Li D, Li G. Network Analysis Indicates Microbial Assemblage Differences in Life Stages of Cladophora. Appl Environ Microbiol 2023; 89:e0211222. [PMID: 36880773 PMCID: PMC10057885 DOI: 10.1128/aem.02112-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/09/2023] [Indexed: 03/08/2023] Open
Abstract
Cladophora represents a microscopic forest that provides many ecological niches and fosters a diverse microbiota. However, the microbial community on Cladophora in brackish lakes is still poorly understood. In this study, the epiphytic bacterial communities of Cladophora in Qinghai Lake were investigated at three life stages (attached, floating, and decomposing). We found that in the attached stage, Cladophora was enriched with chemoheterotrophic and aerobic microorganisms, including Yoonia-Loktanella and Granulosicoccus. The proportion of phototrophic bacteria was higher in the floating stage, especially Cyanobacteria. The decomposing stage fostered an abundance of bacteria that showed vertical heterogeneity from the surface to the bottom. The surface layer of Cladophora contained mainly stress-tolerant chemoheterotrophic and photoheterotrophic bacteria, including Porphyrobacter and Nonlabens. The microbial community in the middle layer was similar to that of floating-stage Cladophora. Purple oxidizing bacteria were enriched in the bottom layer, with Candidatus Chloroploca, Allochromatium, and Thiocapsa as the dominant genera. The Shannon and Chao1 indices of epibiotic bacterial communities increased monotonically from the attached stage to the decomposing stage. Microbial community composition and functional predictions indicate that a large number of sulfur cycle-associated bacteria play an important role in the development of Cladophora. These results suggest that the microbial assemblage on Cladophora in a brackish lake is complex and contributes to the cycling of materials. IMPORTANCE Cladophora represents a microscopic forest that provides many ecological niches fostering a diverse microbiota, with a complex and intimate relationship between Cladophora and bacteria. Many studies have focused on the microbiology of freshwater Cladophora, but the composition and succession of microorganisms in different life stages of Cladophora, especially in brackish water, have not been explored. In this study, we investigated the microbial assemblages in the life stages of Cladophora in the brackish Qinghai Lake. We show that heterotrophic and photosynthetic autotrophic bacteria are enriched in attached and floating Cladophora, respectively, whereas the epiphytic bacterial community shows vertical heterogeneity in decomposing mats.
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Affiliation(s)
- Yuming Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Panpan Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Weicheng Zhou
- College of Chemistry, Biology and Environmental Engineering, Xiangnan University, Chenzhou, People’s Republic of China
| | - Shun Huang
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Chengrong Peng
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Dunhai Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Genbao Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People’s Republic of China
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7
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Song Z, Chomicki KM, Drouillard K, Weidman RP. Effects of detection limits on spatial modeling of water quality in lakes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 864:161052. [PMID: 36566858 DOI: 10.1016/j.scitotenv.2022.161052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 11/27/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Identifying sources and fate of nutrients and pollutants in lake waters is often difficult when key analytes (e.g., dissolved phosphate) are frequently below analytical detection limits (non-detects). One way of dealing with this problem in water quality data is to replace non-detects with "fill-in" values using imputation methods (IMs). While their performance for estimating descriptive statistics (e.g., mean and variance) has been evaluated comprehensively for many environmental variables, whether IMs can reconstruct spatial patterns using long-term water quality data with non-detects under different magnitudes of spatial variation remains under-studied. We developed an integrative framework, combining numerical simulations with univariate and multivariate approaches, to compare performance of nine IMs in recovering spatial patterns of water quality data with different degrees of spatial heterogeneity. We applied this framework to a 12-year water quality dataset sampled from the nearshore region of Lake Ontario near Pickering and Ajax to show the usefulness of IMs in estimating water quality spatial variation. Firstly, in the simplest modeling scenario, we found that most IMs reproduced spatial patterns of univariate data well with ≤30 % non-detects in the dataset. Secondly, when spatial patterns were heterogeneous (e.g., when weak water mixing in nearshore regions limited nutrient transport from input sources to offshore regions), most IMs also performed well by recovering spatial variation in multivariate data with ≤80 % non-detects. Thirdly, when spatial distributions were homogeneous (e.g., when strong water mixing increased transport of nutrients from input sources to other lake areas), only weighted quantile sum regression (WQSR) performed well in reconstructing spatial multivariate data trends with ≤10 % non-detects. Our study highlighted that IMs (especially WQSR) are useful for reconstructing spatial trends of water quality in large lakes. However, potential interactions between spatial heterogeneity and non-detect frequency must be considered when selecting an appropriate IM procedure to accurately model spatial patterns in water quality.
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Affiliation(s)
- Zhuoyan Song
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, Canada.
| | - Krista M Chomicki
- Toronto and Region Conservation Authority, 101 Exchange Avenue, Vaughan, Ontario, Canada.
| | - Kenneth Drouillard
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, Canada.
| | - R Paul Weidman
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, Canada.
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8
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Ju J, Rudolph D, King D, Huber A, Ribey M. Subsurface mobility of land applied greenhouse nutrient feed water and environmental implications. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 327:116856. [PMID: 36462483 DOI: 10.1016/j.jenvman.2022.116856] [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: 08/16/2022] [Revised: 11/18/2022] [Accepted: 11/20/2022] [Indexed: 06/17/2023]
Abstract
Greenhouse nutrient feedwater (GNF) discharge is considered a potential contributor to eutrophication issues in Lake Erie, Ontario. Land application of GNF is an accepted legislated management response to mitigate the impact of such nutrient loads. To assess the potential environmental impacts of this management practice, field infiltration experiments were conducted at four different greenhouse operations near Leamington, Ontario. Over a three-year study, GNF was applied on agricultural land adjacent to the greenhouse operations in the fall during the first year, and along with a bromide tracer in the summer and fall in Years 2 and 3, respectively. The GNF was applied at the maximum allowable rates as defined in legislation. Chemical constituents (nutrients, metals and the conservative tracer bromide) were monitored within the soil profile matrix and pore water above the water table. The results showed that, even with the GNF being applied at the highest permissible rates, the species of interest remained within the unsaturated soil zone at low concentrations over three to six months sampling intervals. The bromide tracer test demonstrated that highly mobile species could move through permeable soils to the water table depth in a potential worst-case application scenario. However, considering the low initial concentrations, long vadose zone residence time and the low mass flux, it would appear that land application of GNF, when applied in accordance with Ontario's Regulations, is a feasible and environmentally reasonable treatment option for managing GNF.
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Affiliation(s)
- Jiangyue Ju
- Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
| | - David Rudolph
- Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
| | - Donald King
- The Soil Resource Group, Guelph, Ontario, N1H 2Y5, Canada.
| | - Ann Huber
- The Soil Resource Group, Guelph, Ontario, N1H 2Y5, Canada.
| | - Margaret Ribey
- The Soil Resource Group, Guelph, Ontario, N1H 2Y5, Canada.
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9
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Xie Y, Sheng Y, Li D, He F, Du J, Jiang L, Luo C, Li G, Zhang D. Change of the structure and assembly of bacterial and photosynthetic communities by the ecological engineering practices in Dianchi Lake. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 315:120386. [PMID: 36228847 DOI: 10.1016/j.envpol.2022.120386] [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: 03/15/2022] [Revised: 08/15/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Cyanobacterial bloom challenges the aquatic ecosystem and ecological restoration is an effective approach for cyanobacterial bloom control, but the change of aquatic community after ecological restoration is still unclear. Dianchi Lake is an eutrophic lake with frequent cyanobacterial blooms in China, and recent ecological restoration projects in Caohai (north part) have a satisfactory performance. In this study, we collected 249 water samples at 23 sites from Dianchi Lake to explore the relationships between water physicochemical variables and aquatic microbial communities. Water physicochemical variables in Waihai (south part) intensively changed along time, whereas those in Caohai did not. Photoautotrophic communities were significantly divergent between Caohai and Waihai. Waihai had a lower diversity of photoautotrophic community, containing higher abundance of Cyanophyceae (89.9%) than Caohai (42.7%). Nutrient level and Cyanophyceae only exhibited strong correlations in Wahai (p < 0.05). Redundancy analysis and microbial ecological network suggested that microbial communities in Caohai had a higher stability. Deterministic process dominated the microbial assembly (50-80% for bacteria and >90% for photoautotrophs), and particularly in Caohai. Our results unraveled that the structure and assembly of bacterial and photoautotrophic communities significantly changed after ecological restoration, offering valuable suggestions that photosynthetic diversity should be focused for other ecological restoration projects.
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Affiliation(s)
- Yucheng Xie
- College of New Energy and Environment, Jilin University, Changchun, 130021, PR China; Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun, 130021, PR China.
| | - Yizhi Sheng
- Department of Geology and Environmental Earth Science, Miami University, OH, 45056, USA
| | - Danni Li
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Feng He
- Water Environment Research Division, Kunming Dianchi & Plateau Lakes Institute, Kunming, 650000, China
| | - Jinsong Du
- Water Environment Research Division, Kunming Dianchi & Plateau Lakes Institute, Kunming, 650000, China
| | - Longfei Jiang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Chunling Luo
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Guanghe Li
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Dayi Zhang
- College of New Energy and Environment, Jilin University, Changchun, 130021, PR China; Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun, 130021, PR China.
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10
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Opportunistic Macroalgae as a Component in Assessment of Eutrophication. DIVERSITY 2022. [DOI: 10.3390/d14121112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
For the last few decades, coastal eutrophication with the associated mass development of opportunistic macroalgae has increased on a global scale. Since the end of the 2000’s, the number of studies of macroalgal blooms also increased many times. Mass occurrences of such species as Cladophora spp., Ulva spp., and Spirogyra spp. caused a necessity to improve existing methods of ecological assessment and develop new ones. There are many indices based on macroalgae and developed for marine and estuarine ecosystems. However, for correct evaluation, they demand a presence of a number of species, including perennial species from the order Fucales. This requirement cannot be satisfied in fresh or brackish waters, including some estuaries, because often, the freshwater communities are dominated by only one or two opportunistic species. The present paper defines the most relevant topics in studies of macroalgal blooms and reviews indices and metrics which can be recommended for the ecological assessment in diverse habitats influenced or dominated by opportunistic macroalgae species. For ecological assessment of opportunistic communities, according to their seasonal peculiarities, the author recommends, besides biomass, involving evaluation of algal mats (thickness, coverage) and signs of hypoxia.
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11
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Shen C, Liao Q, Bootsma HA, Lafrancois BM. Modelling the transport of sloughed cladophora in the nearshore zone of Lake Michigan. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116203. [PMID: 36108511 DOI: 10.1016/j.jenvman.2022.116203] [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: 12/23/2021] [Revised: 08/19/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
The invasion of dreissenid mussels has profoundly altered benthic physical environments and whole-lake nutrient cycling in the Great Lakes over the past several decades. The resurgence of the filamentous green alga Cladophora appears to be one of the consequences of this invasion. Sloughed Cladophora deteriorates water quality, fouls recreational beaches, and may contribute to outbreaks of avian botulism, which have been especially severe in the Sleeping Bear Dunes National Lakeshore (SLBE) region of Lake Michigan. To help determine the fate of sloughed Cladophora, a Lagrangian particle trajectory model was developed to track the transport of Cladophora fragments in the nearshore zone based upon a physical transport-mixing model. The model results demonstrate that the primary deposition sites of sloughed Cladophora within the SLBE region are mid-depth sites not far away from their initial growth area. Because of high algae production in the nearshore waters and limited exchange between the inner and outer bay, the shoreline beach of Platte Bay appears to be particularly vulnerable to fouling, with overall three times as many accumulated particles as those along the Sleeping Bear Bay and Good Harbor Bay. The results of this model may be used to guide regional environmental management initiatives and provide insights into the mechanisms responsible for avian botulism outbreaks. This model may also inform the development of whole-lake ecosystem models that account for nearshore-offshore interactions.
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Affiliation(s)
- Chunqi Shen
- College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu, China; Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
| | - Qian Liao
- Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Harvey A Bootsma
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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Kuczynski A, Auer MT, Taylor WD, Chapra SC, Dijkstra M. Keeping up with the math: Advancing the ecological foundation of the Great Lakes Cladophora Model. Ecol Modell 2022. [DOI: 10.1016/j.ecolmodel.2022.110118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Influence of Nutrients and the Native Community on E. coli Survival in the Beach Environment. Appl Environ Microbiol 2022; 88:e0104322. [PMID: 36218359 PMCID: PMC9642020 DOI: 10.1128/aem.01043-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Previous research has identified E. coli populations that persist in freshwater beach sand distinct from fecal pollution events. This work identifies factors that influence the survival of E. coli in sand using laboratory microcosms to replicate beach conditions. Microcosms were deployed to examine the effect of genetic background, competition with native microbial community, and increased nutrient concentrations on E. coli survival. Survival was comparable between the phylotypes B1 and B2, however, deficiency of stress response greatly reduced survival. In the absence of the native community under nutrient conditions comparable to those observed in sand, E. coli cell densities remained within an order of magnitude of initial concentrations after 5 weeks of incubation. Increased nitrogen was associated with decreased decay rates in the first 2 weeks, and increased carbon appeared to provide an advantage at later time points. However, the highest survival was found with the addition of both carbon and nitrogen. Native sand seeded with fresh Cladophora maintained higher concentrations of E. coli, compared to sand containing decayed Cladophora or no Cladophora. Our findings demonstrate persistent E. coli populations in sand can be affected by the availability of carbon and nitrogen, the ability to regulate stress, and the presence of algal mats (i.e., Cladophora). Further, this work suggests that the native microbial communities may modulate survival by outcompeting E. coli for nutrients. IMPORTANCE Current monitoring for fecal pollution does not account for persistent E. coli populations in freshwater sand, which can result in higher concentrations in water when no threat to human health is present. This work examined the drivers for persistent E. coli populations in sand to aid beach management techniques. We examined the influence of nutrients, including localized sources such as stranded Cladophora, on E. coli populations. We found the major determinant of E. coli survival in freshwater beach sand was the addition of nutrients, specifically carbon and nitrogen concentrations 10-fold higher than baseline concentrations on beaches. This work provides the framework for identifying pollution sources that can promote E. coli survival in sand through the characterization of carbon and nitrogen content, which can be incorporated into beach management techniques. Through this improved knowledge, we can begin to understand E. coli fluctuations in water due to resuspension from sand into water.
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Burlakova LE, Karatayev AY, Boltovskoy D, Correa NM. Ecosystem services provided by the exotic bivalves Dreissena polymorpha, D. rostriformis bugensis, and Limnoperna fortunei. HYDROBIOLOGIA 2022; 850:2811-2854. [PMID: 35990416 PMCID: PMC9376586 DOI: 10.1007/s10750-022-04935-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 06/15/2022] [Accepted: 06/25/2022] [Indexed: 06/02/2023]
Abstract
The ecosystem services approach to conservation is becoming central to environmental policy decision making. While many negative biological invasion-driven impacts on ecosystem structure and functioning have been identified, much less was done to evaluate their ecosystem services. In this paper, we focus on the often-overlooked ecosystem services provided by three notable exotic ecosystem engineering bivalves, the zebra mussel, the quagga mussel, and the golden mussel. One of the most significant benefits of invasive bivalves is water filtration, which results in water purification and changes rates of nutrient cycling, thus mitigating the effects of eutrophication. Mussels are widely used as sentinel organisms for the assessment and biomonitoring of contaminants and pathogens and are consumed by many fishes and birds. Benefits of invasive bivalves are particularly relevant in human-modified ecosystems. We summarize the multiple ecosystem services provided by invasive bivalves and recommend including the economically quantifiable services in the assessments of their economic impacts. We also highlight important ecosystem disservices by exotic bivalves, identify data limitations, and future research directions. This assessment should not be interpreted as a rejection of the fact that invasive mussels have negative impacts, but as an attempt to provide additional information for scientists, managers, and policymakers.
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Affiliation(s)
| | | | - Demetrio Boltovskoy
- IEGEBA, Instituto de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales - Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Nancy M. Correa
- Servicio de Hidrografía Naval and Escuela de Ciencias del Mar, Facultad de la Armada, Sede Educativa Universitaria, UNDEF, Buenos Aires, Argentina
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15
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Filamentous Algae Blooms in a Large, Clear-Water Lake: Potential Drivers and Reduced Benthic Primary Production. WATER 2022. [DOI: 10.3390/w14132136] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An apparent proliferation of filamentous algal blooms (FABs) in pristine lakes around the world is a source of concern. However, little is known about the predominant drivers and effects of such FABs on lake ecosystems. We observed FABs in a large clear-water lake (Bear Lake, UT/ID, USA) and analyzed long-term lake monitoring data and algal stable isotopes for changes in climate, food webs and anthropogenic nutrient loading, respectively, as potential local drivers of FAB formation. Furthermore, we quantified in situ metabolism rates on rocks with and without FABs at two locations. Long-term monitoring data revealed increasing summer water temperatures (2009 to 2020) and decreasing winter ice cover (1923 to 2021). The FABs had δ15N values that were higher than 0 ‰, indicating a potential nutrient influx to Bear Lake from livestock or human waste. Climate change and anthropogenic nutrients may thus have facilitated FAB occurrence. Contrary to expectation, the FABs exhibited significantly lower gross primary production rates compared to low-biomass periphyton communities, indicating potentially negative effects of FAB proliferations on lake food webs. Our results highlight the need for expanding lake monitoring programs to include littoral zones to detect and mitigate changes occurring in lakes.
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16
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Pauer JJ, Melendez W, Hollenhorst T, Woodruff D, Brown T. A modeling study to determine the contribution of interbasin versus intrabasin phosphorus loads on the southwestern nearshore of Lake Ontario. JOURNAL OF GREAT LAKES RESEARCH 2022; 48:343-358. [PMID: 38841315 PMCID: PMC11151752 DOI: 10.1016/j.jglr.2021.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Elevated phosphorus and nuisance algae such as Cladophora have been persistent environmental concerns in the coastal areas of Lake Ontario. Phosphorus is regarded as one of the drivers of nearshore Cladophora and the most likely mitigation that can be used to control levels of this nuisance algae in the lakes. The Niagara River, carrying the Lake Erie interbasin load, is the major contributor of the overall phosphorus load to Lake Ontario. Due to circulation patterns in the lake, this contribution is especially significant in the southwestern nearshore areas. Here we apply a mathematical model to provide insight into the relative contribution of the Niagara River versus loadings from local rivers (intrabasin loads) on the nearshore phosphorus concentrations in this region. We performed numerical experiments to determine to what extent the Niagara, Genesee and smaller local rivers impact the nearshore (< 20 m depth) phosphorus concentrations. Our model results show that the Niagara River dominates the nearshore region between its discharge location and the Genesee River's mouth, but the Genesee River strongly impacts the nearby Ontario Beach region in the very nearshore (< 5 m depth). Smaller rivers have some impact close to their discharge locations. However, uncertainty with the Niagara River phosphorus load is the limiting factor in making any credible nearshore phosphorus predictions. Model accuracy is also impacted by insufficient short time scale phosphorus loads for all of the rivers, the dynamic nature of the lake circulation in shallow nearshore areas, and the simplified assumptions of the model.
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Affiliation(s)
- James J Pauer
- US Environmental Protection Agency, Office of Research and Development
| | | | | | | | - Terry Brown
- US Environmental Protection Agency, Office of Research and Development
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17
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Juijuljerm R, Vanijajiva O, Chittapun S. The potential of using akinetes as seed starters for Cladophora glomerata cultivation: Germination and growth of akinetes under different light intensities and humic concentrations. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Implementation of a watershed modelling framework to support adaptive management in the Canadian side of the Lake Erie basin. ECOL INFORM 2021. [DOI: 10.1016/j.ecoinf.2021.101444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Ruen-Pham K, Graham LE, Satjarak A. Spatial Variation of Cladophora Epiphytes in the Nan River, Thailand. PLANTS (BASEL, SWITZERLAND) 2021; 10:2266. [PMID: 34834629 PMCID: PMC8622721 DOI: 10.3390/plants10112266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 11/16/2022]
Abstract
Cladophora is an algal genus known to be ecologically important. It provides habitats for microorganisms known to provide ecological services such as biosynthesis of cobalamin (vitamin B12) and nutrient cycling. Most knowledge of microbiomes was obtained from studies of lacustrine Cladophora species. However, whether lotic freshwater Cladophora microbiomes are as complex as the lentic ones or provide similar ecological services is not known. To illuminate these issues, we used amplicons of 16S rDNA, 18S rDNA, and ITS to investigate the taxonomy and diversity of the microorganisms associated with replicate Cladophora samples from three sites along the Nan River, Thailand. Results showed that the diversity of prokaryotic and eukaryotic members of Cladophora microbiomes collected from different sampling sites was statistically different. Fifty percent of the identifiable taxa were shared across sampling sites: these included organisms belonging to different trophic levels, decomposers, and heterotrophic bacteria. These heterogeneous assemblages of bacteria, by functional inference, have the potential to perform various ecological functions, i.e., cellulose degradation, cobalamin biosynthesis, fermentative hydrogen production, ammonium oxidation, amino acid fermentation, dissimilatory reduction of nitrate to ammonium, nitrite reduction, nitrate reduction, sulfur reduction, polyphosphate accumulation, denitrifying phosphorus-accumulation, and degradation of aromatic compounds. Results suggested that river populations of Cladophora provide ecologically important habitat for microorganisms that are key to nutrient cycling in lotic ecosystems.
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Affiliation(s)
- Karnjana Ruen-Pham
- Plants of Thailand Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
| | - Linda E. Graham
- Department of Botany, University of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI 53706, USA;
| | - Anchittha Satjarak
- Plants of Thailand Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
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20
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Vadeboncoeur Y, Moore MV, Stewart SD, Chandra S, Atkins KS, Baron JS, Bouma-Gregson K, Brothers S, Francoeur SN, Genzoli L, Higgins SN, Hilt S, Katona LR, Kelly D, Oleksy IA, Ozersky T, Power ME, Roberts D, Smits AP, Timoshkin O, Tromboni F, Zanden MJV, Volkova EA, Waters S, Wood SA, Yamamuro M. Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms Are an Emerging Threat to Clear Lakes Worldwide. Bioscience 2021; 71:1011-1027. [PMID: 34616235 PMCID: PMC8490932 DOI: 10.1093/biosci/biab049] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Nearshore (littoral) habitats of clear lakes with high water quality are increasingly experiencing unexplained proliferations of filamentous algae that grow on submerged surfaces. These filamentous algal blooms (FABs) are sometimes associated with nutrient pollution in groundwater, but complex changes in climate, nutrient transport, lake hydrodynamics, and food web structure may also facilitate this emerging threat to clear lakes. A coordinated effort among members of the public, managers, and scientists is needed to document the occurrence of FABs, to standardize methods for measuring their severity, to adapt existing data collection networks to include nearshore habitats, and to mitigate and reverse this profound structural change in lake ecosystems. Current models of lake eutrophication do not explain this littoral greening. However, a cohesive response to it is essential for protecting some of the world's most valued lakes and the flora, fauna, and ecosystem services they sustain.
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Affiliation(s)
| | | | | | - Sudeep Chandra
- Biology Department and the Global Water Center, University of Nevada, Reno, Nevada, United States
| | - Karen S Atkins
- University of California, Davis, Davis, California, United States
| | - Jill S Baron
- US Geological Survey, Fort Collins, Colorado, United States
| | - Keith Bouma-Gregson
- California State Water Resources Control Board, Sacramento, California, United States
| | | | | | - Laurel Genzoli
- Flathead Lake Biological Station and the University of Montana, Missoula, Montana, United States
| | - Scott N Higgins
- International Institute for Sustainable Development, Experimental Lakes Area, with its head office in Winnipeg, Manitoba, Canada
| | - Sabine Hilt
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | | | | | | | - Ted Ozersky
- Large Lakes Observatory, University of Minnesota, Duluth, Minnesota, United States
| | - Mary E Power
- University of California, Berkeley, Berkeley, California, United States
| | - Derek Roberts
- San Francisco Estuary Institute, Richmond, California, United States
| | - Adrianne P Smits
- University of California, Davis, Davis, California, United States
| | - Oleg Timoshkin
- Siberian Branch of the Russian Academy of Sciences’ Limnological Institute, Irkutsk, Russian Federation
| | - Flavia Tromboni
- Biology Department and the Global Water Center, University of Nevada, Reno, Nevada, United States
| | - M Jake Vander Zanden
- Center for Limnology, University of Wisconsin—Madison, Madison, Wisconsin, United States
| | - Ekaterina A Volkova
- Siberian Branch of the Russian Academy of Sciences’ Limnological Institute, Irkutsk, Russian Federation
| | | | | | - Masumi Yamamuro
- Graduate School of Frontier Sciences, University of Tokyo, Tokyo, Japan
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21
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Rodrigo MA. Wetland Restoration with Hydrophytes: A Review. PLANTS (BASEL, SWITZERLAND) 2021; 10:1035. [PMID: 34063930 PMCID: PMC8223994 DOI: 10.3390/plants10061035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 06/12/2023]
Abstract
Restoration cases with hydrophytes (those which develop all their vital functions inside the water or very close to the water surface, e.g., flowering) are less abundant compared to those using emergent plants. Here, I synthesize the latest knowledge in wetland restoration based on revegetation with hydrophytes and stress common challenges and potential solutions. The review mainly focusses on natural wetlands but also includes information about naturalized constructed wetlands, which nowadays are being used not only to improve water quality but also to increase biodiversity. Available publications, peer-reviewed and any public domain, from the last 20 years, were reviewed. Several countries developed pilot case-studies and field-scale projects with more or less success, the large-scale ones being less frequent. Using floating species is less generalized than submerged species. Sediment transfer is more adequate for temporary wetlands. Hydrophyte revegetation as a restoration tool could be improved by selecting suitable wetlands, increasing focus on species biology and ecology, choosing the suitable propagation and revegetation techniques (seeding, planting). The clear negative factors which prevent the revegetation success (herbivory, microalgae, filamentous green algae, water and sediment composition) have to be considered. Policy-making and wetland restoration practices must more effectively integrate the information already known, particularly under future climatic scenarios.
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Affiliation(s)
- Maria A Rodrigo
- Integrative Ecology Group, Cavanilles Institute for Biodiversity and Evolutionary Biology, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980 Valencia, Spain
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22
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Peller J, Nevers MB, Byappanahalli M, Nelson C, Ganesh Babu B, Evans MA, Kostelnik E, Keller M, Johnston J, Shidler S. Sequestration of microfibers and other microplastics by green algae, Cladophora, in the US Great Lakes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 276:116695. [PMID: 33601201 DOI: 10.1016/j.envpol.2021.116695] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Daunting amounts of microplastics are present in surface waters worldwide. A main category of microplastics is synthetic microfibers, which originate from textiles. These microplastics are generated and released in laundering and are discharged by wastewater treatment plants or enter surface waters from other sources. The polymers that constitute many common synthetic microfibers are mostly denser than water, and eventually settle out in aquatic environments. The interaction of these microfibers with submerged aquatic vegetation has not been thoroughly investigated but is potentially an important aquatic sink in surface waters. In the Laurentian Great Lakes, prolific growth of macrophytic Cladophora creates submerged biomass with a large amount of surface area and the potential to collect and concentrate microplastics. To determine the number of synthetic microfibers in Great Lakes Cladophora, samples were collected from Lakes Erie and Michigan at multiple depths in the spring and summer of 2018. After rinsing and processing the algae, associated synthetic microfibers were quantified. The average loads of synthetic microfibers determined from the Lake Erie and Lake Michigan samples were 32,000 per kg (dry weight (dw)) and 34,000 per kg (dw), respectively, 2-4 orders of magnitude greater than loads previously reported in water and sediment. To further explore this sequestration of microplastics, fresh and aged Cladophora were mixed with aqueous mixtures of microfibers or microplastic in the laboratory to simulate pollution events. Microscopic analyses indicated that fresh Cladophora algae readily interacted with microplastics via adsorptive forces and physical entanglement. These interactions mostly cease upon algal senescence, with an expected release of microplastics in benthic sediments. Collectively, these findings suggest that synthetic microfibers are widespread in Cladophora algae and the affinity between microplastics and Cladophora may offer insights for removing microplastic pollution. Macroalgae in the Laurentian Great Lakes contain high loads of synthetic microfibers, both entangled and adsorbed, which likely account for an important fraction of microplastics in these surface waters.
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Affiliation(s)
- Julie Peller
- Department of Chemistry, 1710 Chapel Drive, Valparaiso University, Valparaiso, IN, 46383, USA.
| | - Meredith B Nevers
- U.S. Geological Survey, Great Lakes Science Center, Chesterton, IN, 46304, USA
| | | | - Cassie Nelson
- Department of Cell Biology and Neurosciences, Rutgers University, Piscataway, NJ, 08854, USA
| | | | - Mary Anne Evans
- U.S. Geological Survey, Great Lakes Science Center, Ann Arbor, MI, 48105, USA
| | - Eddie Kostelnik
- Department of Chemistry, 1710 Chapel Drive, Valparaiso University, Valparaiso, IN, 46383, USA
| | - Morgan Keller
- Department of Chemistry, 1710 Chapel Drive, Valparaiso University, Valparaiso, IN, 46383, USA
| | - Jenna Johnston
- Department of Geography, Valparaiso University, Valparaiso, IN, 46383, USA
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23
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Zhang L, Huang S, Peng X, Liu B, Zhang X, Ge F, Zhou Q, Wu Z. Potential ecological implication of Cladophora oligoclora decomposition: Characteristics of nutrient migration, transformation, and response of bacterial community structure. WATER RESEARCH 2021; 190:116741. [PMID: 33341035 DOI: 10.1016/j.watres.2020.116741] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/24/2020] [Accepted: 12/09/2020] [Indexed: 06/12/2023]
Abstract
During decay, the sediment microenvironment and water quality are severely affected by excessive proliferation of harmful algae such as filamentous green algae (FGA). The frequency of this FGA is increased through global warming and water eutrophication. In the present study, the degradation processes of a common advantage FGA Cladophora oligoclora and its effect on nitrogen and phosphorus nutrient structure and bacterial community composition at the sediment-water interface were investigated by stable isotope labelling and high-throughput sequencing. The results showed that the decomposition process of C. oligoclona was fast, stable, and difficult to degrade. The changes in sediment δ15N values reached 66.68 ‰ on day 40, which indicated that some of the nitrogen had migrated to the sediment from C. oligoclona litter. TN and NH4+-N in the overlying water rapidly increased between days 0-10, NH4+-N rose to 78.21% of TN on day 40, resulting in severe pollution of ammonia in the overlying water. The nitrogen forms and contents in the sediment are mainly derived from the increasing ammonia nitrogen release. The TP and IP in the overlying water increased to the highest concentrations of 6.68±0.64, 6.59±0.79 mg·L-1 during the decomposition process, respectively, resulting in the migration of phosphate to the sediments with increasing phosphorus content. The abundance of the main dominant bacterial communities, such as Acinetobacter (0.08%-62.48%) and Pseudomonas (0.13%-20.36%) in sediments and overlying water has changed significantly. The correlation analysis results suggested that the phosphorus was mainly related to the bacterial community in the overlying water, while the various forms of nitrogen demonstrated a high relevance with the bacterial community in the sediment. Our research results will be valuable in evaluating the potential ecological risk of FGA decomposition and provide scientific support for shallow lake management and submerged vegetation restoration.
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Affiliation(s)
- Lu Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Suzhen Huang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xue Peng
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Biyun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
| | - Xinyi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Fangjie Ge
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Qiaohong Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
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Management of the Phosphorus–Cladophora Dynamic at a Site on Lake Ontario Using a Multi-Module Bioavailable P Model. WATER 2021. [DOI: 10.3390/w13030375] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The filamentous green alga Cladophora grows to nuisance proportions in Lake Ontario. Stimulated by high phosphorus concentrations, nuisance growth results in the degradation of beaches and clogging of industrial water intakes with attendant loss of beneficial uses. We develop a multi-module bioavailable phosphorus model to examine the efficacy of phosphorus management strategies in mitigating nuisance algal growth. The model platform includes modules simulating hydrodynamics (FVCOM), phosphorus-phytoplankton dynamics (GEM) and Cladophora growth (GLCMv3). The model is applied along a 25 km stretch of the Lake Ontario nearshore, extending east from Toronto, ON and receiving effluent from three wastewater treatment plants. Simulation results identify the Duffin Creek wastewater treatment plant effluent as a driving force for nuisance conditions of Cladophora growth, as reflected in effluent bioavailable phosphorus concentrations and the dimensions of the plant’s phosphorus footprint. Simulation results demonstrate that phosphorus removal by chemically enhanced secondary treatment is insufficient to provide relief from nuisance conditions. Tertiary treatment (chemically enhanced secondary treatment with ballasted flocculation) is shown to eliminate phosphorus-saturated conditions associated with the Duffin Creek wastewater treatment plant effluent, providing local relief from nuisance conditions. Management guidance presented here has wider application at sites along the highly urbanized Canadian nearshore of Lake Ontario.
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25
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Flores-Morales G, Díaz M, Arancibia-Avila P, Muñoz-Carrasco M, Jara-Zapata P, Toledo-Montiel F, Vega-Román E. Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae. BRAZ J BIOL 2020; 81:544-550. [PMID: 32785467 DOI: 10.1590/1519-6984.224708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 02/20/2020] [Indexed: 11/22/2022] Open
Abstract
A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.
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Affiliation(s)
- Gonzalo Flores-Morales
- Universidad del Bío-Bío, Facultad de Ciencias, Departamento de Ciencias Básicas, Programa Magister Ciencias Biológicas, Chillán, Chile
| | - Mónica Díaz
- Universidad del Bío-Bío, Facultad de Ciencias, Departamento de Ciencias Básicas, Carrera Ingeniería en Recursos Naturales, Chillán, Chile
| | | | - Michelle Muñoz-Carrasco
- Universidad de Concepción, Facultad de Agronomía, Departamento de Producción Vegetal, Chillán, Chile
| | - Pamela Jara-Zapata
- Universidad de Concepción, Facultad de Agronomía, Departamento de Producción Vegetal, Chillán, Chile
| | - Fernando Toledo-Montiel
- Universidad del Bío-Bío, Facultad de Ciencias, Departamento de Ciencias Básicas, Chillán, Chile
| | - Emmanuel Vega-Román
- Universidad del Bío-Bío, Facultad de Ciencias, Departamento de Ciencias Básicas, Chillán, Chile
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Zhang W, Shen H, Zhang J, Yu J, Xie P, Chen J. Physiological differences between free-floating and periphytic filamentous algae, and specific submerged macrophytes induce proliferation of filamentous algae: A novel implication for lake restoration. CHEMOSPHERE 2020; 239:124702. [PMID: 31520979 DOI: 10.1016/j.chemosphere.2019.124702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 08/27/2019] [Accepted: 08/27/2019] [Indexed: 06/10/2023]
Abstract
Restoration of submerged macrophytes is widely applied to counteract eutrophication in shallow lakes. However, proliferation and accumulation of filamentous algae (possessing free-floating and periphytic life forms) hamper growth of submerged macrophytes. Here, we explored factors triggering the excessive proliferation of filamentous algae during lake restoration using field investigations and laboratory experiments. Results showed that, compared with free-floating Oscillatoria sp. (FO), periphytic Oscillatoria sp. (PO) showed faster growth rate, greater photosynthetic capacities and higher phosphorus (P) affinity. Therefore, PO was physiologically competitively superior to FO under low P concentration and improved light conditions. And proliferation of filamentous algae was mainly manifested in periphytic life form. Besides, field results showed that density of filamentous algae in water column might be related to substrate types. Some macrophyte (Ceratophyllum oryzetorum and Potamogeton crispus) might provide proper substrates for proliferation of filamentous algae. Further physiological experiments found that Oscillatoria showed specific eco-physiological responses to different macrophyte species. Hydrilla verticillata and C. oryzetorum promoted growth and photosynthetic activity of Oscillatoria, while Potamogeton malaianus inhibited growth and P uptake of PO. Myriophyllum spicatum exhibited no impact on growth of Oscillatoria. Our results revealed the intrinsic (physiological differences between free-floating and periphytic life forms of filamentous algae) and extrinsic (different macrophytes) factors affect the proliferation of filamentous algae, which are important for guidance on planting of submerged macrophytes during lake restoration.
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Affiliation(s)
- Weizhen Zhang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hong Shen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Jia Zhang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jia Yu
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Ping Xie
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Jun Chen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
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Shen C, Liao Q, Bootsma HA. Modelling the influence of invasive mussels on phosphorus cycling in Lake Michigan. Ecol Modell 2020. [DOI: 10.1016/j.ecolmodel.2019.108920] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Castles built on sand or predictive limnology in action? Part A: Evaluation of an integrated modelling framework to guide adaptive management implementation in Lake Erie. ECOL INFORM 2019. [DOI: 10.1016/j.ecoinf.2019.05.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Gladyshev MI, Gubelit YI. Green Tides: New Consequences of the Eutrophication of Natural Waters (Invited Review). CONTEMP PROBL ECOL+ 2019. [DOI: 10.1134/s1995425519020057] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Influences on Water Quality and Abundance of Cladophora, a Shore-Fouling Green Algae, over Urban Shoreline in Lake Ontario. WATER 2018. [DOI: 10.3390/w10111569] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Urban centers border western Lake Ontario, the terminus of the Laurentian Great Lakes, impacting water quality on the shores of this oligotrophic lake. The green algae Cladophora proliferates on the shallow lakebed and fouls the shoreline, presenting an eutrophication concern. The conditions over a typical urbanized shoreline were studied to assess linkages between Cladophora and area nutrient sources. The most pervasive of the mixing areas of varying extent identified using field sensor measurements was associated with the discharge of treated sewage from a Water Pollution Control Plant (WPCP). Phosphorus and nitrogen were enriched at times near the WPCP diffuser and also in shallow water along the shoreline. Dissolved nutrients were also measured directly above the lakebed in close proximity to Cladophora. Dissolved phosphorus and inorganic nitrogen were higher in proximity to the WPCP diffuser at times, however, spatial patterns were not as clearly aligned with external inputs as the patterns of enrichment in the water column. Biomass distribution of Cladophora was unrelated to nutrient levels in the water column or at the lakebed. Yet, concentrations of phosphorus in Cladophora, an indicator of nutrient sufficiency, were higher near the WPCP diffuser. This disparity, while possibly an artifact of variable loss rates of biomass among locations, may in part stem from variable water clarity among areas. Abundant dreissenid mussels also potentially obscure the effects of nutrient loading on algal biomass if the sequestering of phosphorus from offshore plankton, suggested by periods of onshore circulation, approaches the extent of external loading. Further study of phosphorus flux at the lakebed is required to establish clear linkages between external nutrient loading and algal growth in order to manage the proliferation of Cladophora over urban coastline.
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Vadeboncoeur Y, Power ME. Attached Algae: The Cryptic Base of Inverted Trophic Pyramids in Freshwaters. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2017. [DOI: 10.1146/annurev-ecolsys-121415-032340] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
It seems improbable that a thin veneer of attached algae coating submerged surfaces in lakes and rivers could be the foundation of many freshwater food webs, but increasing evidence from chemical tracers supports this view. Attached algae grow on any submerged surface that receives enough light for photosynthesis, but animals often graze attached algae down to thin, barely perceptible biofilms. Algae in general are more nutritious and digestible than terrestrial plants or detritus, and attached algae are particularly harvestable, being concentrated on surfaces. Diatoms, a major component of attached algal assemblages, are especially nutritious and tolerant of heavy grazing. Algivores can track attached algal productivity over a range of spatial scales and consume a high proportion of new attached algal growth in high-light, low-nutrient ecosystems. The subsequent efficient conversion of the algae into consumer production in freshwater food webs can lead to low-producer, high-consumer biomass, patterns that Elton (1927) described as inverted trophic pyramids. Human perturbations of nutrient, sediment, and carbon loading into freshwaters and of thermal and hydrologic regimes can weaken consumer control of algae and promote nuisance attached algal blooms.
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Affiliation(s)
- Yvonne Vadeboncoeur
- Department of Biological Sciences, Wright State University, Dayton, Ohio 45435
| | - Mary E. Power
- Department of Integrative Biology, University of California, Berkeley, California 94720-3140
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Gao W, Chen K, Zeng J, Xu J, Wang B. Thermal pyrolysis characteristics of macroalgae Cladophora glomerata. BIORESOURCE TECHNOLOGY 2017; 243:212-217. [PMID: 28667840 DOI: 10.1016/j.biortech.2017.06.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/06/2017] [Accepted: 06/07/2017] [Indexed: 06/07/2023]
Abstract
The Cladophora glomerata (C. glomerata) is a kind of widely distributed macroalgae in the freshwater ecosystems. It primarily consists of carbohydrates that can be converted into biofuel by pyrolysis. In this study, thermogravimetric analysis (TGA) was used to investigate the thermal behavior and kinetics of C. glomerata during the pyrolysis process. The results showed that heating rates slightly affect the decomposition properties of C. glomerata; with the heating rates increasing, the maximum peak of weight loss rate shifted to higher temperatures. The activation energies of C. glomerata pyrolysis reaction were 244.25 and 238.07kJ/mol, respectively, as calculated by Friedman and Kissinger-Akahira-Sunose (KAS) methods. The pre-exponential factor and reaction order were determined by Coats-Redfern model, and applied to simulate the pyrolysis process of C. glomerata. The model calculated data and experimental data were consistent. This study could provide theoretical supports for designing C. glomerata conversion processes.
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Affiliation(s)
- Wenhua Gao
- State Key Laboratory of Pulp and Paper Engineering, Plant Micro/nano Fiber Research Center, South China University of Technology, Guangzhou, China
| | - Kefu Chen
- State Key Laboratory of Pulp and Paper Engineering, Plant Micro/nano Fiber Research Center, South China University of Technology, Guangzhou, China
| | - Jinsong Zeng
- State Key Laboratory of Pulp and Paper Engineering, Plant Micro/nano Fiber Research Center, South China University of Technology, Guangzhou, China.
| | - Jun Xu
- State Key Laboratory of Pulp and Paper Engineering, Plant Micro/nano Fiber Research Center, South China University of Technology, Guangzhou, China
| | - Bin Wang
- State Key Laboratory of Pulp and Paper Engineering, Plant Micro/nano Fiber Research Center, South China University of Technology, Guangzhou, China
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Liu J, Wu Y, Wu C, Muylaert K, Vyverman W, Yu HQ, Muñoz R, Rittmann B. Advanced nutrient removal from surface water by a consortium of attached microalgae and bacteria: A review. BIORESOURCE TECHNOLOGY 2017; 241:1127-1137. [PMID: 28651870 DOI: 10.1016/j.biortech.2017.06.054] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/09/2017] [Accepted: 06/11/2017] [Indexed: 06/07/2023]
Abstract
Innovative and cost-effective technologies for advanced nutrient removal from surface water are urgently needed for improving water quality. Conventional biotechnologies, such as ecological floating beds, or constructed wetlands, are not effective in removing nutrients present at low-concentration. However, microalgae-bacteria consortium is promising for advanced nutrient removal from wastewater. Suspended algal-bacterial systems can easily wash out unless the hydraulic retention time is long, attached microalgae-bacteria consortium is more realistic. This critical review summarizes the fundamentals and status of attached microalgae-bacteria consortium for advanced nutrient removal from surface water. Key advantages are the various nutrient removal pathways, reduction of nutrients to very low concentration, and diversified photobioreactor configurations. Challenges include poor identification of functional species, poor control of the community composition, and long start-up times. Future research should focus on the selection and engineering of robust microbial species, mathematical modelling of the composition and functionality of the consortium, and novel photobioreactor configurations.
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Affiliation(s)
- Junzhuo Liu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, China
| | - Yonghong Wu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, China.
| | - Chenxi Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Koenraad Muylaert
- Laboratory Aquatic Biology, KU Leuven Kulak, Etienne Sabbelaan 53, 8500 Kortrijk, Belgium
| | - Wim Vyverman
- Laboratory of Protistology and Aquatic Ecology, Department of Biology, Ghent University, Krijgslaan 281-S8, 9000 Ghent, Belgium
| | - Han-Qing Yu
- Department of Chemistry, University of Science & Technology of China, Hefei 230026, China
| | - Raúl Muñoz
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineerings, Valladolid University, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - Bruce Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, P.O. Box 875701, Tempe, AZ 85287-5701, USA
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35
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Çelekli A, Kapı E, Soysal Ç, Arslanargun H, Bozkurt H. Evaluating biochemical response of filamentous algae integrated with different water bodies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 142:171-180. [PMID: 28411512 DOI: 10.1016/j.ecoenv.2017.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 04/03/2017] [Accepted: 04/05/2017] [Indexed: 06/07/2023]
Abstract
The present study prompted the second attempts to evaluate biochemical responses of filamentous algae under different physico-chemical variables in various water bodies in Turkey. These variables were investigated by use of multivariate approach in the years of 2013 (May and November) and 2014 (May and October). Studied ecoregions had the different geographic position, climate, land-use, and anthropogenic activities, could strongly affect physico-chemical variables of water bodies, which caused to change or regulate in algal biomass composition due to the different response of filamentous species. Besides, biochemical responses of species changed at different sampling times and stations. Multivariate analyses indicated that temperature, heavy metals, and nutrient contents of aquatic systems were found to be major variables driving the spatial and temporal occurrence and biochemical contents of filamentous species. Total protein and pigment production by filamentous algae were high in water bodies having high nutrients, whereas they were low in high heavy metal contents. Amount of malondialdehyde (MDA), H2O2, total thiol group, total phenolic compounds, proline, total carbohydrate, and bioaccumulation of metals by filamentous algae were closely related with heavy metal contents of water bodies, indicated by the multivariate approach. Significant increase in aforementioned biochemical compounds with a distinct range of habitats and sensitive-tolerance to environmental conditions could make them highly valuable indicators.
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Affiliation(s)
- Abuzer Çelekli
- Department of Biology, Faculty of Art and Science, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Emine Kapı
- Department of Biology, Faculty of Art and Science, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Çiğdem Soysal
- Department of Food Engineering, Faculty of Engineering, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Hamdullah Arslanargun
- Department of Biology, Faculty of Art and Science, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Hüseyin Bozkurt
- Department of Food Engineering, Faculty of Engineering, University of Gaziantep, 27310 Gaziantep, Turkey.
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Foley CJ, Henebry ML, Happel A, Bootsma HA, Czesny SJ, Janssen J, Jude DJ, Rinchard J, Höök TO. Patterns of integration of invasive round goby (Neogobius melanostomus) into a nearshore freshwater food web. FOOD WEBS 2017. [DOI: 10.1016/j.fooweb.2016.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ibsen M, Fernando DM, Kumar A, Kirkwood AE. Prevalence of antibiotic resistance genes in bacterial communities associated with Cladophora glomerata mats along the nearshore of Lake Ontario. Can J Microbiol 2017; 63:439-449. [PMID: 28192677 DOI: 10.1139/cjm-2016-0803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The alga Cladophora glomerata can erupt in nuisance blooms throughout the lower Great Lakes. Since bacterial abundance increases with the emergence and decay of Cladophora, we investigated the prevalence of antibiotic resistance (ABR) in Cladophora-associated bacterial communities up-gradient and down-gradient from a large sewage treatment plant (STP) on Lake Ontario. Although STPs are well-known sources of ABR, we also expected detectable ABR from up-gradient wetland communities, since they receive surface run-off from urban and agricultural sources. Statistically significant differences in aquatic bacterial abundance and ABR were found between down-gradient beach samples and up-gradient coastal wetland samples (ANOVA, Holm-Sidak test, p < 0.05). Decaying and free-floating Cladophora sampled near the STP had the highest bacterial densities overall, including on ampicillin- and vancomycin-treated plates. However, quantitative polymerase chain reaction analysis of the ABR genes ampC, tetA, tetB, and vanA from environmental communities showed a different pattern. Some of the highest ABR gene levels occurred at the 2 coastal wetland sites (vanA). Overall, bacterial ABR profiles from environmental samples were distinguishable between living and decaying Cladophora, inferring that Cladophora may control bacterial ABR depending on its life-cycle stage. Our results also show how spatially and temporally dynamic ABR is in nearshore aquatic bacteria, which warrants further research.
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Affiliation(s)
- Michael Ibsen
- a Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street N., Oshawa, ON L1H 7K4, Canada
| | - Dinesh M Fernando
- a Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street N., Oshawa, ON L1H 7K4, Canada.,b Department of Microbiology, University of Manitoba, 414E Buller Building, Winnipeg, MB R3T 2N2, Canada.,c Department of Chemical Biology and Therapeutics, IRC Building, Mail Stop: 1000, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Ayush Kumar
- a Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street N., Oshawa, ON L1H 7K4, Canada.,b Department of Microbiology, University of Manitoba, 414E Buller Building, Winnipeg, MB R3T 2N2, Canada
| | - Andrea E Kirkwood
- a Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street N., Oshawa, ON L1H 7K4, Canada
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Chun CL, Peller JR, Shively D, Byappanahalli MN, Whitman RL, Staley C, Zhang Q, Ishii S, Sadowsky MJ. Virulence and biodegradation potential of dynamic microbial communities associated with decaying Cladophora in Great Lakes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:872-880. [PMID: 27665447 DOI: 10.1016/j.scitotenv.2016.09.107] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/13/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
Cladophora mats that accumulate and decompose along shorelines of the Great Lakes create potential threats to the health of humans and wildlife. The decaying algae create a low oxygen and redox potential environment favoring growth and persistence of anaerobic microbial populations, including Clostridium botulinum, the causal agent of botulism in humans, birds, and other wildlife. In addition to the diverse population of microbes, a dynamic chemical environment is generated, which involves production of numerous organic and inorganic substances, many of which are believed to be toxic to the sand and aquatic biotic communities. In this study, we used 16S-rDNA-based-amplicon sequencing and microfluidic-based quantitative PCR approaches to characterize the bacterial community structure and the abundances of human pathogens associated with Cladophora at different stages (up to 90days) of algal decay in laboratory microcosms. Oxygen levels were largely depleted after a few hours of incubation. As Cladophora decayed, the algal microbial biodiversity decreased within 24h, and the mat transitioned from an aerobic to anaerobic environment. There were increasing abundances of enteric and pathogenic bacteria during decomposition of Cladophora, including Acinetobacter, Enterobacter, Kluyvera, Cedecea, and others. In contrast, there were no or very few sequences (<0.07%) assigned to such groups in fresh Cladophora samples. Principal coordinate analysis indicated that the bacterial community structure was dynamic and changed significantly with decay time. Knowledge of microbial communities and chemical composition of decaying algal mats is critical to our further understanding of the role that Cladophora plays in a beach ecosystem's structure and function, including the algal role in trophic interactions. Based on these findings, public and environmental health concerns should be considered when decaying Cladophora mats accumulate Great Lakes shorelines.
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Affiliation(s)
- Chan Lan Chun
- Department of Civil Engineering, University of Minnesota Duluth, Duluth, MN 55812, United States; Natural Resources Research Institute, University of Minnesota Duluth, Duluth, MN 55812, United States
| | - Julie R Peller
- Department of Chemistry, Valparaiso University, Valparaiso, IN 46383, United States
| | - Dawn Shively
- Lake Michigan Ecological Research Station, U.S. Geological Survey, Chesterton, IN 46304, United States
| | | | - Richard L Whitman
- Lake Michigan Ecological Research Station, U.S. Geological Survey, Chesterton, IN 46304, United States
| | - Christopher Staley
- BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, United States
| | - Qian Zhang
- BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, United States
| | - Satoshi Ishii
- BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, United States; Department of Soil, Water, and Climate, University of Minnesota, St. Paul, MN 55108, United States
| | - Michael J Sadowsky
- BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, United States; Department of Soil, Water, and Climate, University of Minnesota, St. Paul, MN 55108, United States.
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Brothers S, Vadeboncoeur Y, Sibley P. Benthic algae compensate for phytoplankton losses in large aquatic ecosystems. GLOBAL CHANGE BIOLOGY 2016; 22:3865-3873. [PMID: 27029572 DOI: 10.1111/gcb.13306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 03/25/2016] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
Anthropogenic activities can induce major trophic shifts in aquatic systems, yet we have an incomplete understanding of the implication of such shifts on ecosystem function and on primary production (PP) in particular. In recent decades, phytoplankton biomass and production in the Laurentian Great Lakes have declined in response to reduced nutrient concentrations and invasive mussels. However, the increases in water clarity associated with declines in phytoplankton may have positive effects on benthic PP at the ecosystem scale. Have these lakes experienced oligotrophication (a reduction of algal production), or simply a shift in autotrophic structure with no net decline in PP? Benthic contributions to ecosystem PP are rarely measured in large aquatic systems, but our calculations based on productivity rates from the Great Lakes indicate that a significant proportion (up to one half, in Lake Huron) of their whole-lake production may be benthic. The large declines (5-45%) in phytoplankton production in the Great Lakes from the 1970s to 2000s may be substantially compensated by benthic PP, which increased by up to 190%. Thus, the autotrophic productive capacity of large aquatic ecosystems may be relatively resilient to shifts in trophic status, due to a redirection of production to the near-shore benthic zone, and large lakes may exhibit shifts in autotrophic structure analogous to the regime shifts seen in shallow lakes.
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Affiliation(s)
- Soren Brothers
- School of Environmental Sciences, University of Guelph, Bovey Building, Gordon Street, Guelph, ON, N1G 2W1, Canada
| | - Yvonne Vadeboncoeur
- Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA
| | - Paul Sibley
- School of Environmental Sciences, University of Guelph, Bovey Building, Gordon Street, Guelph, ON, N1G 2W1, Canada
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Çelekli A, Arslanargun H, Soysal Ç, Gültekin E, Bozkurt H. Biochemical responses of filamentous algae in different aquatic ecosystems in South East Turkey and associated water quality parameters. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 133:403-412. [PMID: 27508982 DOI: 10.1016/j.ecoenv.2016.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/29/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
To the best of our knowledge, any study about biochemical response of filamentous algae in the complex freshwater ecosystems has not been found in the literature. This study was designed to explore biochemical response of filamentous algae in different water bodies from May 2013 to October 2014, using multivariate approach in the South East of Turkey. Environmental variables were measured in situ: water temperature, oxygen concentration, saturation, conductivity, salinity, pH, redox potential, and total dissolved solid. Chemical variables of aqueous samples and biochemical compounds of filamentous algae were also measured. It was found that geographic position and anthropogenic activities had strong effect on physico-chemical variables of water bodies. Variation in environmental conditions caused change in algal biomass composition due to the different response of filamentous species, also indicated by FTIR analysis. Biochemical responses not only changed from species to species, but also varied for the same species at different sampling time and sampling stations. Multivariate analyses showed that heavy metals, nutrients, and water hardness were found as the important variables governing the temporal and spatial succession and biochemical compounds. Nutrients, especially nitrate, could stimulate pigment and total protein production, whereas high metal content had adverse effects. Amount of malondialdehyde (MDA), H2O2, total thiol groups, total phenolic compounds, proline, total carbohydrate, and metal bioaccumulation by filamentous algae could be closely related with heavy metals in the ecosystems. Significant increase in MDA, H2O2, total thiol group, total phenolic compounds, and proline productions by filamentous algae and chlorosis phenomenon seemed to be an important strategy for alleviating environmental factors-induced oxidative stress as biomarkers.
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Affiliation(s)
- Abuzer Çelekli
- Department of Biology, Faculty of Art and Science, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Hamdullah Arslanargun
- Department of Biology, Faculty of Art and Science, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Çiğdem Soysal
- Department of Food Engineering, Faculty of Engineering, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Emine Gültekin
- Department of Biology, Faculty of Art and Science, University of Gaziantep, 27310 Gaziantep, Turkey.
| | - Hüseyin Bozkurt
- Department of Food Engineering, Faculty of Engineering, University of Gaziantep, 27310 Gaziantep, Turkey.
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Watson SB, Miller C, Arhonditsis G, Boyer GL, Carmichael W, Charlton MN, Confesor R, Depew DC, Höök TO, Ludsin SA, Matisoff G, McElmurry SP, Murray MW, Peter Richards R, Rao YR, Steffen MM, Wilhelm SW. The re-eutrophication of Lake Erie: Harmful algal blooms and hypoxia. HARMFUL ALGAE 2016; 56:44-66. [PMID: 28073496 DOI: 10.1016/j.hal.2016.04.010] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 04/21/2016] [Accepted: 04/22/2016] [Indexed: 05/12/2023]
Abstract
Lake Erie supplies drinking water to more than 11 million consumers, processes millions of gallons of wastewater, provides important species habitat and supports a substantial industrial sector, with >$50 billion annual income to tourism, recreational boating, shipping, fisheries, and other industries. These and other key ecosystem services are currently threatened by an excess supply of nutrients, manifested in particular by increases in the magnitude and extent of harmful planktonic and benthic algal blooms (HABs) and hypoxia. Widespread concern for this important international waterbody has been manifested in a strong focus of scientific and public material on the subject, and commitments for Canada-US remedial actions in recent agreements among Federal, Provincial and State agencies. This review provides a retrospective synthesis of past and current nutrient inputs, impairments by planktonic and benthic HABs and hypoxia, modelling and Best Management Practices in the Lake Erie basin. The results demonstrate that phosphorus reduction is of primary importance, but the effects of climate, nitrogen and other factors should also be considered in the context of adaptive management. Actions to reduce nutrient levels by targeted Best Management Practices will likely need to be tailored for soil types, topography, and farming practices.
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Affiliation(s)
- Susan B Watson
- Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, Burlington, ON L7S 1A1, Canada.
| | - Carol Miller
- Department of Civil and Environmental Engineering, Urban Watershed Environmental Research Group, Wayne State University, Detroit, MI 48202, USA
| | - George Arhonditsis
- Department of Physical & Environmental Sciences, University of Toronto, Toronto, ON M1C 1A4, Canada
| | - Gregory L Boyer
- Department of Chemistry, State University of New York - College of Environmental Science and Forestry, Syracuse, NY 13210, USA
| | - Wayne Carmichael
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | | | - Remegio Confesor
- National Center for Water Quality Research, Heidelberg University, Tiffin, OH 44883, USA
| | - David C Depew
- Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, Burlington, ON L7S 1A1, Canada
| | - Tomas O Höök
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907-2033, USA
| | - Stuart A Ludsin
- Aquatic Ecology Laboratory, Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH 43212, USA
| | - Gerald Matisoff
- Department of Earth, Environmental and Planetary Sciences Case Western Reserve University, Cleveland, OH 44106-7216, USA
| | - Shawn P McElmurry
- Department of Civil and Environmental Engineering, Urban Watershed Environmental Research Group, Wayne State University, Detroit, MI 48202, USA
| | - Michael W Murray
- National Wildlife Federation Great Lakes Regional Center, Ann Arbor, MI 48104, USA
| | | | - Yerubandi R Rao
- Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, Burlington, ON L7S 1A1, Canada
| | - Morgan M Steffen
- Department of Biology, James Madison University, Harrisonburg, VA 22807, USA
| | - Steven W Wilhelm
- Department of Microbiology, The University of Tennessee, Knoxville, TN 37996-0845, USA
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Graham LE, Knack JJ, Graham ME, Graham JM, Zulkifly S. A metagenome for lacustrine Cladophora (Cladophorales) reveals remarkable diversity of eukaryotic epibionts and genes relevant to materials cycling. JOURNAL OF PHYCOLOGY 2015; 51:408-418. [PMID: 26986658 DOI: 10.1111/jpy.12296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 02/11/2015] [Indexed: 06/05/2023]
Abstract
Periphyton dominated by the cellulose-rich filamentous green alga Cladophora forms conspicuous growths along rocky marine and freshwater shorelines worldwide, providing habitat for diverse epibionts. Bacterial epibionts have been inferred to display diverse functions of biogeochemical significance: N-fixation and other redox reactions, phosphorus accumulation, and organic degradation. Here, we report taxonomic diversity of eukaryotic and prokaryotic epibionts and diversity of genes associated with materials cycling in a Cladophora metagenome sampled from Lake Mendota, Dane Co., WI, USA, during the growing season of 2012. A total of 1,060 distinct 16S, 173 18S, and 351 28S rRNA operational taxonomic units, from which >220 genera or species of bacteria (~60), protists (~80), fungi (6), and microscopic metazoa (~80), were distinguished with the use of reference databases. We inferred the presence of several algal taxa generally associated with marine systems and detected Jaoa, a freshwater periphytic ulvophyte previously thought endemic to China. We identified six distinct nifH gene sequences marking nitrogen fixation, >25 bacterial and eukaryotic cellulases relevant to sedimentary C-cycling and technological applications, and genes encoding enzymes in aerobic and anaerobic pathways for vitamin B12 biosynthesis. These results emphasize the importance of Cladophora in providing habitat for microscopic metazoa, fungi, protists, and bacteria that are often inconspicuous, yet play important roles in ecosystem biogeochemistry.
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Affiliation(s)
- Linda E Graham
- Department of Botany, University of Wisconsin, Madison, Wisconsin, USA
| | - Jennifer J Knack
- Department of Botany, University of Wisconsin, Madison, Wisconsin, USA
| | - Melissa E Graham
- School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, USA
| | - James M Graham
- Department of Botany, University of Wisconsin, Madison, Wisconsin, USA
| | - Shahrizim Zulkifly
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
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Spatial, Temporal, and Matrix Variability of Clostridium botulinum Type E Toxin Gene Distribution at Great Lakes Beaches. Appl Environ Microbiol 2015; 81:4306-15. [PMID: 25888178 DOI: 10.1128/aem.00098-15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 04/12/2015] [Indexed: 11/20/2022] Open
Abstract
Clostridium botulinum type E toxin is responsible for extensive mortality of birds and fish in the Great Lakes. The C. botulinum bontE gene that produces the type E toxin was amplified with quantitative PCR from 150 sloughed algal samples (primarily Cladophora species) collected during summer 2012 from 10 Great Lakes beaches in five states; concurrently, 74 sediment and 37 water samples from four sites were also analyzed. The bontE gene concentration in algae was significantly higher than in water and sediment (P < 0.05), suggesting that algal mats provide a better microenvironment for C. botulinum. The bontE gene was detected most frequently in algae at Jeorse Park and Portage Lake Front beaches (Lake Michigan) and Bay City State Recreation Area beach on Saginaw Bay (Lake Huron), where 77, 100, and 83% of these algal samples contained the bontE gene, respectively. The highest concentration of bontE was detected at Bay City (1.98 × 10(5) gene copies/ml of algae or 5.21 × 10(6) g [dry weight]). This study revealed that the bontE gene is abundant in the Great Lakes but that it has spatial, temporal, and matrix variability. Further, embayed beaches, low wave height, low wind velocity, and greater average water temperature enhance the bontE occurrence.
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Gubelit YI. Climatic impact on community of filamentous macroalgae in the Neva estuary (eastern Baltic Sea). MARINE POLLUTION BULLETIN 2015; 91:166-172. [PMID: 25540916 DOI: 10.1016/j.marpolbul.2014.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 11/28/2014] [Accepted: 12/03/2014] [Indexed: 06/04/2023]
Abstract
In presented study the impact of climatic factors and North Atlantic Oscillation (NAO) on macroalgal community was analysed. Also the factors influencing algal community were defined with help of Principal Component and Classification analysis. It was found that climatic impact may depend on habitat features and that on different sites biomass of macroalgae correlated with different weather factors. Wind and surf may affect biomass of macroalgae adversely on some sites and at the same time on other sites they may accumulate biomass, transferring it is from adjacent areas. High direct correlation with temperature was found on sites which were protected from surf and had no stagnant events. Seasonal biomass inversely significantly correlated with average seasonal wind speed and annual NAO-index.
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Messyasz B, Leska B, Fabrowska J, Pikosz M, Roj E, Cieslak A, Schroeder G. Biomass of freshwater Cladophora as a raw material for agriculture and the cosmetic industry. OPEN CHEM 2015. [DOI: 10.1515/chem-2015-0124] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThis study was undertaken to determine mineral content, amino acid and fatty acid composition of the freshwater macroalga – Cladophora glomerata. The studies were based on the content comparison in algal biomass collected from a lake and cultured in a laboratory. To determine the ability of copper cumulating by macroalgae, Cladophora was cultured in the medium supplemented with Cu ions. This study indicated that the relative abundance of metals in filaments decreased in the following order: Ca > K > Mg > Na > Fe > Cu > Zn > Pb > As > Ni > Cd > Mn > Cr > Co. Total protein content ranged from 14.45% in Cladophora from a lake to 26.55% in Cladophora from a laboratory. The main amino acids analyzed were aspartic and glutamic acid. The fatty acid content in the dry matter of the extract varied depending on the extraction method used: ethylene alcohol (19.0%), acetone (34.5%) or supercritical fluid extraction (62.5%). Freshwater C. glomerata due to the macrominerals, trace elements, amino and fatty acids composition in the extracts can be a valuable resource for nutritional and cosmetic applications.
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Remote Sensing of Submerged Aquatic Vegetation in a Shallow Non-Turbid River Using an Unmanned Aerial Vehicle. REMOTE SENSING 2014. [DOI: 10.3390/rs61212815] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Lee PO, McLellan SL, Graham LE, Young EB. Invasive dreissenid mussels and benthic algae in Lake Michigan: characterizing effects on sediment bacterial communities. FEMS Microbiol Ecol 2014; 91:1-12. [DOI: 10.1093/femsec/fiu001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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48
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Sharara MA, Holeman N, Sadaka SS, Costello TA. Pyrolysis kinetics of algal consortia grown using swine manure wastewater. BIORESOURCE TECHNOLOGY 2014; 169:658-666. [PMID: 25105272 DOI: 10.1016/j.biortech.2014.06.111] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 06/28/2014] [Accepted: 06/30/2014] [Indexed: 06/03/2023]
Abstract
In this study, pyrolysis kinetics of periphytic microalgae consortia grown using swine manure slurry in two seasonal climatic patterns in northwest Arkansas were investigated. Four heating rates (5, 10, 20 and 40 °C min(-1)) were used to determine the pyrolysis kinetics. Differences in proximate, ultimate, and heating value analyses reflected variability in growing substrate conditions, i.e., flocculant use, manure slurry dilution, and differences in diurnal solar radiation and air temperature regimes. Peak decomposition temperature in algal harvests varied with changing the heating rate. Analyzing pyrolysis kinetics using differential and integral isoconversional methods (Friedman, Flynn-Wall-Ozawa, and Kissinger-Akahira-Sunose) showed strong dependency of apparent activation energy on the degree of conversion suggesting parallel reaction scheme. Consequently, the weight loss data in each thermogravimetric test was modeled using independent parallel reactions (IPR). The quality of fit (QOF) for the model ranged between 2.09% and 3.31% indicating a good agreement with the experimental data.
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Affiliation(s)
- Mahmoud A Sharara
- Biological and Agricultural Engineering Department, University of Arkansas - Division of Agriculture, AR, USA
| | - Nathan Holeman
- Biological and Agricultural Engineering Department, University of Arkansas - Division of Agriculture, AR, USA
| | - Sammy S Sadaka
- Biological and Agricultural Engineering Department, University of Arkansas - Division of Agriculture, AR, USA.
| | - Thomas A Costello
- Biological and Agricultural Engineering Department, University of Arkansas - Division of Agriculture, AR, USA
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Higgins SN, Althouse B, Devlin SP, Vadeboncoeur Y, Vander Zanden MJ. Potential for large-bodied zooplankton and dreissenids to alter the productivity and autotrophic structure of lakes. Ecology 2014; 95:2257-67. [DOI: 10.1890/13-2333.1] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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50
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Beckinghausen A, Martinez A, Blersch D, Haznedaroglu BZ. Association of nuisance filamentous algae Cladophora spp. with E. coli and Salmonella in public beach waters: impacts of UV protection on bacterial survival. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:1267-1274. [PMID: 24643370 DOI: 10.1039/c3em00659j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study investigated whether filamentous algal species commonly found in nearshore public beach water systems provide protection from natural UV to bacteria present in the same environmental settings. To test this hypothesis, Cladophora spp., a filamentous nuisance algae group causing undesired water quality in the Great Lakes region was selected and its interactions with a non-pathogenic indicator organism Escherichia coli and a pathogenic strain of Salmonella enterica serovar Typhimurium were tested. In laboratory microcosms where the lake environment and natural sunlight conditions were simulated, a 7-log removal of E. coli was observed in only six hours of exposure to UV with an initial seed concentration of 10(3) CFU mL(-1). With the presence of algae, the same log removal was achieved in 16 hours. At higher seed concentrations of 10(5) CFU mL(-1), E. coli survived for two days with an extended survival up to 11 days in the presence of Cladophora spp. S. typhimurium has shown more resilient survival profiles, with the same log removals achieved in 14 and 20 days for low and high seed concentrations respectively, in the absence of algae. Cladophora spp. caused extended protection for S. typhimurium with much less log reductions reported. Algae-mediated protection from UV irradiation was attributed to certain organic carbon exuded from Cladophora spp. In addition, confocal microscopy images confirmed close interaction between bacteria and algae, more prominent with thin filamentous Cladophora spp.
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Affiliation(s)
- Aubrey Beckinghausen
- Department of Civil, Structural, and Environmental Engineering, University at Buffalo, 212 Ketter Hall, Buffalo, NY, 14260 USA.
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