Restoration ecology of coastal lagoons: new methods for the prediction of ecological trajectories and economic valuation

Wit, Rutger de; Rey‐Valette, Hélène; Balavoine, Juliette; Ouisse, Vincent; Lifran, Robert

doi:10.1002/aqc.2601

Cited by 28 publications

(26 citation statements)

References 33 publications

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“…In this shallow oligotrophic lagoon, the ecosystem functioning is largely impacted by the benthos. An important cover of seagrasses (Zostera noltei, > 80% of coverage) predominates the primary production and inorganic nutrient uptake (De Wit et al 2017). In addition, the benthos is home to suspension feeders that exert grazing pressure on phytoplankton, maintaining low population densities despite high μ 0 values.…”

Section: Vulnerability Of Lagoons To Nutrient Pulses During Re-oligotmentioning

confidence: 99%

Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication

Leruste¹,

Guilhaumon²,

Wit³

et al. 2019

Aquat. Microb. Ecol.

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We studied a mesotrophic and a hypertrophic Mediterranean coastal lagoon, both of which had been simultaneously subjected to a nutrient input reduction for 9 yr. We compared these 2 lagoons to an oligotrophic coastal lagoon. Using bioassays comprising 24 h incubations with added phosphorus and/or ammonium, we investigated the response of the phytoplankton communities to nutrient enrichment during summer in terms of biomass, size class structure, abundance and growth. For nitrogen and phosphorus, we identified which nutrient limited phytoplankton growth, and what strategies of nutrient exploitation the communities adopted to cope with these limitations. Ultraphytoplankton dominated the 3 communities, but it differed in composition among the lagoons. Green algae dominated in the hypertrophic lagoon, whereas the mesotrophic lagoon presented a higher diversity of phytoplankton groups. Picocyanobacteria and small diatoms were the most abundant groups in the oligotrophic lagoon, although they accounted for less biomass than green algae. The communities of the mesotrophic and the hypertrophic lagoons strongly responded to the nutrient pulse, showing that the re-oligotrophication trajectories of these lagoons were still very vulnerable to occasional eutrophication events. On the other hand, the oligotrophic lagoon marginally responded to the enrichment, indicating its adaptation to nutrientdepleted conditions. We observed a shift along the eutrophication gradient, from a co-limitation by N and P in the oligotrophic and the mesotrophic lagoons to a single and strong N limitation in the hypertrophic lagoon. Each community demonstrated specific use of internal, external or recycled nutrient pools under experimentally induced limitation.

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Section: Vulnerability Of Lagoons To Nutrient Pulses During Re-oligotmentioning

confidence: 99%

Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication

Leruste¹,

Guilhaumon²,

Wit³

et al. 2019

Aquat. Microb. Ecol.

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“…Ayrolle lagoon is directly connected to the Hydrobiologia (2018) 815:207-227 209 Mediterranean Sea through an inlet and receives few nutrient inputs from it small watershed (104 km 2 ). The autotrophic community of Ayrolle is mainly dominated by Zostera noltei Hornemann (1832) seagrasses, covering more than 80% of the lagoon bed (De Wit et al, 2017), while phytoplankton biomasses remain generally low, under 5 lg Chla l -1 (Bec et al, 2011) (see Souchu et al, 2010 for the main limnological characteristics of the three lagoons).…”

Section: Study Sitesmentioning

confidence: 99%

“…North Ingril (IN) located farthest from the Lez River is mesotrophic. Phytoplankton community dominated the primary producers in West Méjean (Bec et al, 2011), although it is increasingly colonized by macroalgae since the beginning of the ecological restoration process (De Wit et al, 2017). North Ingril hosts a huge diversity of autotrophic organisms, including phytoplankton, macroalgae, and seagrasses.…”

Section: Study Sitesmentioning

confidence: 99%

Complementarity of the multidimensional functional and the taxonomic approaches to study phytoplankton communities in three Mediterranean coastal lagoons of different trophic status

et al. 2018

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We used the individual-based multidimensional functional diversity and the taxonomic approaches in a complementary way to describe phytoplankton communities in three coastal lagoons with different eutrophication status in the South of France. We sampled communities during three seasons, i.e., in autumn, spring, and summer. Using classical taxonomy, 107 taxa/morphotypes were identified in the nine communities. The individual-based functional approach allowed grouping these individuals into 20 functional entities according to their values for 5 traits related to trophic adaptations (cell size, mobility, trophic regime, coloniality, and pelagic/benthic life). Some species (e.g., Prorocentrum micans) emerged in multiple functional entities, showing the importance to consider intraspecific variability. The functional description of phytoplankton communities better reflected the hydrological functioning and the different eutrophication status of the lagoons than the taxonomic approach. Specific functional adaptations were identified in the nine communities. For example, phytoplankton organisms with heterotrophic and potentially mixotrophic abilities occurred when the availability of inorganic nutrient decreased, or when organic matter and small preys were potentially the main nutrient resources. The limitation has also favored small cells highly competitive for nutrients. Using functional indices together with taxonomic description has also helped revealing important aspects of community assembly, such as competitive exclusion in summer.

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“…Anas penelope, Cygnus olor, Egretta garzetta, Ardea cinerea) are able to contribute to human well-being because of their mere existence, but also because of their role in supporting of some recreational and leisure activities (C4) like scubadiving, snorkeling and nature watching. In states III and IV, the presence of these protected and rare species decreases for the benefit of a more restrictive number of other protected species like flamingos (de Wit et al, 2015). The contribution of Mediterranean coastal lagoon ecosystems to a pleasant landscape (C2) is mainly based on avifauna, and in a lesser extent, on other living components including underwater seascape (Chazée et al, 2017).…”

Section: Mediterranean Coastal Lagoonsmentioning

confidence: 99%

How does eutrophication impact bundles of ecosystem services in multiple coastal habitats using state-and-transition models

Kermagoret

Claudet

Derolez

et al. 2019

Ocean & Coastal Management

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One of the current major scientific challenges to sustain social-ecological systems is to improve our understanding of the spatial and temporal dynamics of the relationships between biodiversity, ecosystem functioning and ecosystem services. Here, we analyse the bundles of ecosystem services supplied by three coastal ecosystems (coastal lagoons, coral reefs and sandy beaches) along a gradient of eutrophication. Based on a state-and-transition model, we analyses the dynamic responses of ecological communities to environmental change and management actions. Although few exceptions are highlighted, increasing eutrophication in the three ecosystem types leads to a degradation of the ecosystem service bundles, particularly for nutrient and pathogen regulation/sequestration, or for the support of recreational and leisure activities. Despite few obstacles to their full use, state-and-transition models can be very powerful frameworks to integrate multiple functions and services delivered by ecosystems while accounting for their temporal dynamics. Highlights► Gradients of eutrophication modify bundles of coastal ecosystem services. ► Nutrient and pathogen regulation as well as cultural services are particularly impacted. ► State-and-transition model is a powerful framework for environmental management. ► Managers can balance the few gains of eutrophication with the losses of ecosystem services.

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Restoration ecology of coastal lagoons: new methods for the prediction of ecological trajectories and economic valuation

Cited by 28 publications

References 33 publications

Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication

Phytoplankton strategies to exploit nutrients in coastal lagoons with different eutrophication status during re-oligotrophication

Complementarity of the multidimensional functional and the taxonomic approaches to study phytoplankton communities in three Mediterranean coastal lagoons of different trophic status

How does eutrophication impact bundles of ecosystem services in multiple coastal habitats using state-and-transition models

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