Field-Scale Floating Treatment Wetlands: Quantifying Ecosystem Service Provision from Monoculture vs. Polyculture Macrophyte Communities

Global water security is critical for human health, well-being, and economic stability. However, freshwater environments are under increasing anthropogenic pressure and now, more than ever, there is an urgent need for integrated approaches that couple issues of water security and the remediation of degraded aquatic environments. One such strategy is the use of floating treatment wetlands (FTW), which are artificial floating mats that sustain and support the growth of macrophytes capable of removing nutrients from over-enriched waterbodies. In this study, we quantify a range of indicators associated with FTWs, planted with different vegetation community types (i.e., monocultures and polycultures) over the course of a three-year field-scale study. The composition of the two different types of FTWs changed significantly with a convergence in diversity and community composition between the two types of FTWs. Phytoremediation potential of the two FTW communities, in terms of nutrient standing stocks, were also similar but did compare favourably to comparable wild-growing plant communities. There were few substantial differences in invertebrate habitat provision under the FTWs, although the high incidence of predators demonstrated that FTWs can support diverse macroinvertebrate communities. This field-scale study provides important practical insights for environmental managers and demonstrates the potential for enhanced ecosystem service provision from employing nature-based solutions, such as FTWs, in freshwater restoration projects.

[1]  S. Wenger,et al.  The potential for nature-based solutions to combat the freshwater biodiversity crisis , 2023, PLOS Water.

[2]  S. Watmough,et al.  Native plants facilitate vegetation succession on amended and unamended mine tailings , 2021, International journal of phytoremediation.

[3]  J. Heino,et al.  The importance of blue and green landscape connectivity for biodiversity in urban ponds , 2021, Basic and Applied Ecology.

[4]  N. Stybel,et al.  Constructed floating wetlands made of natural materials as habitats in eutrophicated coastal lagoons in the Southern Baltic Sea , 2021, Journal of Coastal Conservation.

[5]  R. Fugi,et al.  Macrophyte diversity alters invertebrate community and fish diet , 2021, Hydrobiologia.

[6]  E. Peiter,et al.  Manganese in Plants: From Acquisition to Subcellular Allocation , 2020, Frontiers in Plant Science.

[7]  Ê. L. Machado,et al.  Floating treatment wetlands: A review and bibliometric analysis. , 2020, The Science of the total environment.

[8]  N. Willby,et al.  The effectiveness of aquatic plants as surrogates for wider biodiversity in standing fresh waters , 2019, Freshwater Biology.

[9]  M. Afzal,et al.  Floating Wetlands: A Sustainable Tool for Wastewater Treatment , 2018, CLEAN - Soil, Air, Water.

[10]  H. Bugmann,et al.  Herbaceous competition and browsing may induce arrested succession in central European forests , 2018 .

[11]  Peter Haase,et al.  Water quality variables and pollution sources shaping stream macroinvertebrate communities. , 2017, The Science of the total environment.

[12]  A. Poi,et al.  Does the effect of aquatic plant types on invertebrate assemblages change across seasons in a subtropical wetland , 2017 .

[13]  E. Olguín,et al.  Long-term assessment at field scale of Floating Treatment Wetlands for improvement of water quality and provision of ecosystem services in a eutrophic urban pond. , 2017, The Science of the total environment.

[14]  Dagmar Haase,et al.  The science, policy and practice of nature-based solutions: An interdisciplinary perspective. , 2017, The Science of the total environment.

[15]  Ana Cristina Cardoso,et al.  Assessing water ecosystem services for water resource management , 2016 .

[16]  Jochen A. Müller,et al.  Hydroponic root mats for wastewater treatment—a review , 2016, Environmental Science and Pollution Research.

[17]  S. Lutts,et al.  Copper Trafficking in Plants and Its Implication on Cell Wall Dynamics , 2016, Front. Plant Sci..

[18]  Stuart E. Bunn,et al.  Grand Challenge for the Future of Freshwater Ecosystems , 2016, Front. Environ. Sci..

[19]  Hannah Jones,et al.  Engineering a plant community to deliver multiple ecosystem services. , 2015, Ecological applications : a publication of the Ecological Society of America.

[20]  Davey L. Jones,et al.  Can macrophyte harvesting from eutrophic water close the loop on nutrient loss from agricultural land? , 2015, Journal of environmental management.

[21]  C. Ahn,et al.  Plant community development as affected by initial planting richness in created mesocosm wetlands , 2015 .

[22]  Kate A Brauman,et al.  Linking water quality and well-being for improved assessment and valuation of ecosystem services , 2012, Proceedings of the National Academy of Sciences.

[23]  William J. Mitsch,et al.  Ecological Engineering , 2012, A Systems Approach to the Environmental Analysis of Pollution Minimization.

[24]  C. Hassall,et al.  Environmental correlates of plant and invertebrate species richness in ponds , 2011, Biodiversity and Conservation.

[25]  Jeffrey W. Matthews,et al.  Convergence and divergence in plant community trajectories as a framework for monitoring wetland restoration progress , 2010 .

[26]  J. Hansen,et al.  Effects of plant morphology on small-scale distribution of invertebrates , 2010 .

[27]  Chih-Min Huang,et al.  Investigation of the Water Purification Efficiency of Flood Irrigation System by Using Flora Succession as an Index , 2010, International journal of phytoremediation.

[28]  Stephen James Ormerod,et al.  Multiple stressors in freshwater ecosystems , 2010 .

[29]  John B. Williams Phytoremediation in Wetland Ecosystems: Progress, Problems, and Potential , 2002 .

[30]  N. Willby,et al.  Tissue nutrient signatures predict herbaceous-wetland community responses to nutrient availability. , 2001, The New phytologist.

[31]  Richard S. Quilliam,et al.  Resources, Environment and Sustainability Resource recovery and freshwater ecosystem restoration — Prospecting for phytoremediation potential in wild macrophyte stands , 2022 .

[32]  B. Shmaefsky,et al.  Phytoremediation: In-situ Applications , 2020, Concepts and Strategies in Plant Sciences.