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Theng V, Sith R, Uk S, Yoshimura C. Phytoplankton productivity in a tropical lake-floodplain system revealed by a process-based primary production model. Ecol Modell 2023. [DOI: 10.1016/j.ecolmodel.2023.110317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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2
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Arani BMS, Carpenter SR, Lahti L, van Nes EH, Scheffer M. Exit time as a measure of ecological resilience. Science 2021; 372:372/6547/eaay4895. [PMID: 34112667 DOI: 10.1126/science.aay4895] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/20/2020] [Accepted: 04/28/2021] [Indexed: 12/16/2022]
Abstract
Ecological resilience is the magnitude of the largest perturbation from which a system can still recover to its original state. However, a transition into another state may often be invoked by a series of minor synergistic perturbations rather than a single big one. We show how resilience can be estimated in terms of average life expectancy, accounting for this natural regime of variability. We use time series to fit a model that captures the stochastic as well as the deterministic components. The model is then used to estimate the mean exit time from the basin of attraction. This approach offers a fresh angle to anticipating the chance of a critical transition at a time when high-resolution time series are becoming increasingly available.
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Affiliation(s)
- Babak M S Arani
- Aquatic Ecology and Water Quality Management, Wageningen University, 6700 AA Wageningen, Netherlands.,Theoretical Research in Evolutionary Life Sciences, Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9700 CC Groningen, Netherlands
| | | | - Leo Lahti
- Department of Computing, University of Turku, Turku, Finland
| | - Egbert H van Nes
- Aquatic Ecology and Water Quality Management, Wageningen University, 6700 AA Wageningen, Netherlands.
| | - Marten Scheffer
- Aquatic Ecology and Water Quality Management, Wageningen University, 6700 AA Wageningen, Netherlands.
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Vinçon-Leite B, Casenave C. Modelling eutrophication in lake ecosystems: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:2985-3001. [PMID: 30463149 DOI: 10.1016/j.scitotenv.2018.09.320] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 06/09/2023]
Abstract
Eutrophication is one of the main causes of the degradation of lake ecosystems. Its intensification during the last decades has led the stakeholders to seek for water management and restoration solutions, including those based on modelling approaches. This paper presents a review of lake eutrophication modelling, on the basis of a scientific appraisal performed by researchers for the French ministries of Environment and Agriculture. After a brief introduction presenting the scientific context, a bibliography analysis is presented. Then the main results obtained with process-based models are summarized. A synthesis of the scientist recommendations in order to improve the lake eutrophication modelling is finally given before the conclusion.
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Affiliation(s)
- Brigitte Vinçon-Leite
- LEESU Ecole des Ponts ParisTech, AgroParisTech, UPEC 6-8 Avenue Blaise Pascal, 77455, Marne-la-Vallée, France.
| | - Céline Casenave
- INRA, UMR MISTEA - Mathematics, Informatics and STatistics for Environment and Agronomy, 2 place Pierre Viala, 34060, Montpellier, France
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4
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Global Sensitivity Analysis of a Water Quality Model in the Three Gorges Reservoir. WATER 2018. [DOI: 10.3390/w10020153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Morales-Marín LA, French JR, Burningham H. Implementation of a 3D ocean model to understand upland lake wind-driven circulation. ENVIRONMENTAL FLUID MECHANICS (DORDRECHT, NETHERLANDS : 2001) 2017; 17:1255-1278. [PMID: 32009858 PMCID: PMC6959372 DOI: 10.1007/s10652-017-9548-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 09/28/2017] [Indexed: 06/10/2023]
Abstract
A community numerical ocean model is used to extend the understanding of wind-driven circulation in small upland lakes. A 3D model of a case study lake (Llyn Conwy, Wales, UK) is calibrated against measured velocity profiles via adjustment of the bottom roughness coefficient. Validation against a separate set of measured velocity profiles confirms the ability of the model to resolve key features of the flow field. Sensitivity analysis shows that the velocity field responds rapidly to changes in the wind forcing. Analysis of the gross circulation using Empirical Orthogonal Functions reveals a persistent two-gyre circulation pattern in the upper half layer of the water column driven by the interaction of wind and bathymetry. At the bottom, the flow is characterised by locally strong currents and analysis of vertical circulation over short time scales shows strong currents in the deepest parts of the lake basin and the responsiveness of the water column to changes in wind speed and direction. Even in small lakes, the assumption of uniform wind stress across the water surface is not always justified and topographic sheltering or other catchment roughness effects give rise to heterogeneity in the wind field. An idealized experiment for the case study lake shows that differences in circulation emerge if the wind stress is allowed to vary across the lake. Energetic wind forcing in upland areas can drive an energetic lake circulation that has important implications for mixing and sediment dynamics. 3D numerical modelling of wind-driven circulation should be more widely used to provide insights into physical limnology to support a wide range of ecological, biogeochemical and palaeoenvironmental studies.
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Affiliation(s)
- L. A. Morales-Marín
- UCL Department of Geography, Environmental Change Research Centre, University College London, Gower Street, London, UK WC1E 6BT UK
- Present Address: Global Institute for Water Security, University of Saskatchewan, 11 Innovation Boulevard, Saskatoon, SK S7N 3H5 Canada
| | - J. R. French
- UCL Department of Geography, Environmental Change Research Centre, University College London, Gower Street, London, UK WC1E 6BT UK
| | - H. Burningham
- UCL Department of Geography, Environmental Change Research Centre, University College London, Gower Street, London, UK WC1E 6BT UK
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Wang C, Feng T, Wang P, Hou J, Qian J. Understanding the transport feature of bloom-forming Microcystis in a large shallow lake: A new combined hydrodynamic and spatially explicit agent-based modelling approach. Ecol Modell 2017. [DOI: 10.1016/j.ecolmodel.2016.10.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Leles SG, Valentin JL, Figueiredo GM. Evaluation of the complexity and performance of marine planktonic trophic models. AN ACAD BRAS CIENC 2016; 88:1971-1991. [PMID: 27901192 DOI: 10.1590/0001-3765201620150588] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 05/04/2016] [Indexed: 11/21/2022] Open
Abstract
Planktonic models represent a powerful tool for creating hypotheses and making predictions about the functioning of marine ecosystems. Their complexity varies according to the number of state variables and the choice of functional forms. We evaluated plankton models during the last 15 years (n =145) with the aims of understanding why they differ in complexity, evaluating model robustness, and describing studies of plankton modelling around the globe. We classified models into four groups: Nutrient-Phytoplankton-Zooplankton (NPZ), Nutrient-Phytoplankton-Zooplankton-Detritus (NPZD), Size-Structured (SS) and Plankton-Functional-Type (PFT). Our results revealed that the number of state variables varied according to the question being addressed: NPZ models were more frequently applied in physical-biological studies, while PFT models were more applied for investigating biogeochemical cycles. Most models were based on simple functional forms which neglect important feedback related to control of plankton dynamics. Modelling studies sometimes failed to describe sensitivity analysis, calibration and validation. The importance of testing different functional forms was commonly overlooked, and the lack of empirical data affected the verification of model robustness. Lastly, we highlight the need to develop modelling studies in the Southern Hemisphere, including Brazil, in order to provide predictions that assist the management of marine ecosystems.
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Affiliation(s)
- Suzana G Leles
- Programa de Pós-Graduação em Ecologia, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Av. Prof. Rodolpho Rocco, 211, 21941-902 Rio de Janeiro, RJ, Brasil
| | - Jean L Valentin
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Av. Prof. Rodolpho Rocco, 211, 21941-902 Rio de Janeiro, RJ, Brasil
| | - Gisela M Figueiredo
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Av. Prof. Rodolpho Rocco, 211, 21941-902 Rio de Janeiro, RJ, Brasil
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Process-based modeling of shallow lake metabolism: Spatio-temporal variability and relative importance of individual processes. Ecol Modell 2016. [DOI: 10.1016/j.ecolmodel.2015.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lake topography and wind waves determining seasonal-spatial dynamics of total suspended matter in turbid Lake Taihu, China: assessment using long-term high-resolution MERIS data. PLoS One 2014; 9:e98055. [PMID: 24846206 PMCID: PMC4028274 DOI: 10.1371/journal.pone.0098055] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 04/28/2014] [Indexed: 11/19/2022] Open
Abstract
Multiple comprehensive in situ bio-optical investigations were conducted from 2005 to 2010 and covered a large variability of total suspended matter (TSM) in Lake Taihu to calibrate and validate a TSM concentration estimation model based on Medium Resolution Imaging Spectrometer (MERIS) data. The estimation model of the TSM concentration in Lake Taihu was developed using top-of-atmosphere (TOA) radiance of MERIS image data at band 9 in combination with a regional empirical atmospheric correction model, which was strongly correlated with the in situ TSM concentration (r2 = 0.720, p<0.001, and n = 73). The relative root mean square error (RRMSE) and mean relative error (MRE) were 36.9% and 31.6%, respectively, based on an independent validation dataset that produced reliable estimations of the TSM concentration. The developed algorithm was applied to 50 MERIS images from 2003 to 2011 to obtain a high spatial and temporal heterogeneity of TSM concentrations in Lake Taihu. Seasonally, the highest and lowest TSM concentrations were found in spring and autumn, respectively. Spatially, TSM concentrations were high in the southern part and center of the lake and low in Xukou Bay, East Lake Taihu. The lake topography, including the water depth and distance from the shore, had a significant effect on the TSM spatial distribution. A significant correlation was found between the daily average wind speed and TSM concentration (r2 = 0.685, p<0.001, and n = 50), suggesting a critical role of wind speed in the TSM variations in Lake Taihu. In addition, a low TSM concentration was linked to the appearance of submerged aquatic vegetation (SAV). Therefore, TSM dynamics were controlled by the lake topography, wind-driven sediment resuspension and SAV distribution.
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Lima P, Pessoa E, Chellappa S, Chellappa N. Phytoplankton Diversity and Physical-Chemical Aspects of Water Quality of Lake Jiqui, Rio Grande do Norte, Brazil. BIOTA AMAZÔNIA 2013. [DOI: 10.18561/2179-5746/biotaamazonia.v3n3p97-112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Chlot S, Widerlund A, Siergieiev D, Ecke F, Husson E, Öhlander B. Modelling nitrogen transformations in waters receiving mine effluents. THE SCIENCE OF THE TOTAL ENVIRONMENT 2011; 409:4585-4595. [PMID: 21816451 DOI: 10.1016/j.scitotenv.2011.07.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 07/07/2011] [Accepted: 07/09/2011] [Indexed: 05/31/2023]
Abstract
This paper presents a biogeochemical model developed for a clarification pond receiving ammonium nitrogen rich discharge water from the Boliden concentration plant located in northern Sweden. Present knowledge about nitrogen (N) transformations in lakes is compiled in a dynamic model that calculates concentrations of the six N species (state variables) ammonium-N (N(am)), nitrate-N (N(ox)), dissolved organic N in water (N(org)), N in phytoplankton (N(pp)), in macrophytes (N(mp)) and in sediment (N(sed)). It also simulates the rate of 16 N transformation processes occurring in the water column and sediment as well as water-sediment and water-atmosphere interactions. The model was programmed in the software Powersim using 2008 data, whilst validation was performed using data from 2006 to 2007. The sensitivity analysis showed that the state variables are most sensitive to changes in the coefficients related to the temperature dependence of the transformation processes. A six-year simulation of N(am) showed stable behaviour over time. The calibrated model rendered coefficients of determination (R(2)) of 0.93, 0.79 and 0.86 for N(am), N(ox) and N(org), respectively. Performance measures quantitatively expressing the deviation between modelled and measured data resulted in values close to zero, indicating a stable model structure. The simulated denitrification rate was on average five times higher than the ammonia volatilisation rate and about three times higher than the permanent burial of N(sed) and, hence, the most important process for the permanent removal of N. The model can be used to simulate possible measures to reduce the nitrogen load and, after some modification and recalibration, it can be applied at other mine sites affected by N rich effluents.
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Affiliation(s)
- Sara Chlot
- Division of Geosciences and Environmental Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden.
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Estrada V, Di Maggio J, Diaz M. Water sustainability: A systems engineering approach to restoration of eutrophic Lakes. Comput Chem Eng 2011. [DOI: 10.1016/j.compchemeng.2011.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sellami I, Guermazi W, Hamza A, Aleya L, Ayadi H. Seasonal dynamics of zooplankton community in four Mediterranean reservoirs in humid area (Beni Mtir: north of Tunisia) and semi arid area (Lakhmes, Nabhana and Sidi Saâd: center of Tunisia). J Therm Biol 2010. [DOI: 10.1016/j.jtherbio.2010.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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