Critical phosphorus loading of different types of shallow lakes and the consequences for management estimated with the ecosystem model PCLake

Janse, Jan H.; Domis, Lisette de Senerpont; Scheffer, Marten; Lijklema, L.; Liere, Lowie van; Klinge, M.; Mooij, Wolf M.

doi:10.1016/j.limno.2008.06.001

Cited by 128 publications

(134 citation statements)

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“…In the bifurcation analysis, the model was run for 20 years (c.f. Janse et al, 2008), starting on the lower end of the phosphorus gradient in conditions that represented a clear-water state. Birds were entered in the system after 10 years and were assumed to be present each year between February 15th and October 15th.…”

Section: Methodsmentioning

confidence: 99%

The impact of bird herbivory on macrophytes and the resilience of the clear-water state in shallow lakes: a model study

et al. 2016

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Shallow lakes have the potential to switch between two alternative stable states: a clear macrophyte-dominated and a turbid phytoplankton-dominated state. Observational and experimental studies show that in some lakes herbivory by birds may severely decrease macrophyte biomass, while in other lakes, the removed biomass by herbivory is compensated by regrowth. These contradictory outcomes might arise because of interplay between top-down control by bird herbivory and bottom-up effects by nutrient loading on macrophytes. Here, we use the ecosystem model PCLake to study top-down and bottom-up control of macrophytes by coots and nutrient loading. Our model predicted that (1) herbivory by birds lowers the critical nutrient loading at which the regime shift occurs; (2) bird impact on macrophyte biomass through herbivory increases with nutrient loading; and (3) improved food quality enhances the impact of birds on macrophytes, thus decreasing the resilience of the clear-water state even further. The fact that bird herbivory can have a large impact on macrophyte biomass and can facilitate a regime shift implies that the presence of waterfowl should be taken into account in the estimation of critical nutrient loadings to be used in water quality management.

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Section: Methodsmentioning

confidence: 99%

The impact of bird herbivory on macrophytes and the resilience of the clear-water state in shallow lakes: a model study

et al. 2016

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“…Scientific and management interests in alternative stable states in shallow lakes triggered an extension of the model, now called PCLake, with macrophytes, predatory fish and a nitrogen cycle in order to cover both states of the system: the current turbid and the desired clear state. Indeed, the model proved to be able to produce switches between clear and turbid states to mimic hysteresis in the response of the system (Janse 1997;Janse et al 2008) and the effects of biomanipulation . Management interests also triggered the development of a wetland module to simulate the impacts of helophytes zones for lake restoration (Janse et al 2001;Sollie et al 2009).…”

Section: Model Development and Applicationsmentioning

confidence: 99%

“…The critical loading levels for a chosen standard lake showed about a factor two uncertainty due to the variation in the posterior parameter distribution . Using the tested model, Janse et al (2008) calculated how the critical loading levels depend on water depth, lake size, retention time, proportional marsh area and type of sediment.…”

Section: Model Development and Applicationsmentioning

confidence: 99%

“…The aim of this research programme was to combine the extensive knowledge of modelling temperate shallow lake ecosystems of the Dutch team (e.g., Janse 2005;Janse et al 2008) with the skilled mathematical knowledge of modelling hydro-dynamic processes of the Russian team (e.g., Belolipetsky et al 2010;Genova et al 2010). The integrated model that resulted from this collaborative research project is documented elsewhere .…”

Section: Introductionmentioning

confidence: 99%

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Challenges and opportunities for integrating lake ecosystem modelling approaches

et al. 2010

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A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others ('reinventing the wheel'). The other challenge is to avoid focusing on only one type of model, while ignoring new and diverse approaches that have become available ('having tunnel vision'). In this paper, we aim at improving the awareness of existing models and knowledge of concurrent approaches in lake ecosystem modelling, without covering all possible model tools and avenues. First, we present a broad variety of modelling approaches. To illustrate these approaches, we give brief descriptions of rather arbitrarily selected sets of specific models. We deal with static models (steady state and regression models), complex dynamic models (CAEDYM, CE-QUAL-W2, Delft 3D-ECO, LakeMab, LakeWeb, MyLake, PCLake, PROTECH, SALMO), structurally dynamic models and minimal dynamic models. We also discuss a group of approaches that could all be classified as individual based: superindividual models (Piscator, Charisma), physiologically structured models, stage-structured models and traitbased models. We briefly mention genetic algorithms, neural networks, Kalman filters and fuzzy logic. Thereafter, we zoom in, as an in-depth example, on the multi-decadal development and application of the lake ecosystem model PCLake and related models (PCLake Metamodel, Lake Shira Model, IPH-TRIM3D-PCLake). In the discussion, we argue that while the historical development of each approach and model is understandable given its 'leading principle', there are many opportunities for combining approaches. We take the point of view that a single 'right' approach does not exist and should not be strived for. Instead, multiple modelling approaches, applied concurrently to a given problem, can help develop an integrative view on the functioning of lake ecosystems. We end with a set of specific recommendations that may be of help in the further development of lake ecosystem models.

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“…Este tipo de ecossistemas é frágil frente à poluição antrópica em que o principal fator que interfere na resiliência do ecossistema é a carga externa de nutrientes, sobretudo o fósforo (Scheffer, 1998;Janse et al, 2008); desta forma, o uso do solo no entorno tem influência direta no estado ecológico do ambiente aquático.…”

Section: Introductionunclassified

Qualidade de água de uma lagoa rasa em meio rural no sul do Brasil

Cunha¹,

Garcia²,

Albertoni³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONo seu entorno, a lagoa Caiubá apresenta regiões preservadas e áreas com cultura de arroz e de pecuária. Esta pesquisa descreve o padrão de variação sazonal e espacial das variáveis fisico-químicas e biológicas durante os anos de 2009 e 2010, em nove pontos distribuídos espacialmente na lagoa, representando suas partes norte, central e sul. A qualidade da água foi avaliada através da aplicação do índice de estado trófico (IET), do índice de qualidade de água (IQA) e das classes da Resolução CONAMA 357/2005. Foram coletadas amostras de invertebrados bentônicos e determinados os Índices Bióticos (IB) de acordo com os modelos da Environmental Protection Agency (EPA-USA) e a adaptação do Biological Monitoring Working Party (BMWP). Os resultados evidenciaram um sistema com alta turbidez e conteúdo de fósforo, além de baixa razão N:P, e com poucas alterações sazonais e espaciais nas variáveis medidas. Embora os resultados do IQA e CONAMA tenham classificado a lagoa Caiubá como águas de excelente a boa qualidade, os resultados do IET e dos IB foram opostos classificando a lagoa como sistema alterado e poluído. Conclui-se que esses índices devam ser readequados através de avaliações sistemáticas visando refletir as condições de qualidade de ecossistemas aquáticos em meio rural, na região subtropical do Brasil. The results demonstrated a system with high turbidity and phosphorus content, and low N:P ratio, and with little seasonal and spatial changes in the measured variables. Although the results of WQI and the CONAMA have classified the lagoon waters with excellent to good quality, the results of the TSI and the BI were opposites, classifying the ecosystem as amended and polluted system. It is concluded that these indices should be readjusted through systematic evaluations in order to reflect the quality condition of aquatic ecosystems in rural areas in the subtropical region of Brazil.

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Critical phosphorus loading of different types of shallow lakes and the consequences for management estimated with the ecosystem model PCLake

Cited by 128 publications

References 72 publications

The impact of bird herbivory on macrophytes and the resilience of the clear-water state in shallow lakes: a model study

The impact of bird herbivory on macrophytes and the resilience of the clear-water state in shallow lakes: a model study

Challenges and opportunities for integrating lake ecosystem modelling approaches

Qualidade de água de uma lagoa rasa em meio rural no sul do Brasil

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