Assessing the ecological status of an estuarine ecosystem: linking biodiversity and food-web indicators

Guen, Camille Le; Tecchio, Samuele; Dauvin, Jean–Claude; Roton, Gwenola de; Lobry, Jérémy; Lepage, Mario; Morin, Jocelyne; Lassalle, Géraldine; Raoux, Aurore; Niquil, Nathalie

doi:10.1016/j.ecss.2019.106339

Cited by 19 publications

(5 citation statements)

References 80 publications

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“…Coastal and estuarine waters are important marine ecosystems which feature high primary production, biomass and biodiversity, as well as provision of multiple ecosystem functions and services (Guen et al., 2019; Savage et al., 2012; Wu et al., 2017). The persistence of ecosystem functions in coastal and estuarine waters is degraded by growing maritime activities (Huang et al., 2018; Huang et al., 2020; Guen et al., 2019; Murray et al., 2019). The protection of coastal and estuarine ecosystems demands holistic planning that addresses the management of entire ecosystems (Barbier et al., 2008; Curtin & Prellezo, 2010; Domínguez‐Tejo et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Mapping habitat protection priority over a marine ecoregion under information gaps

Kittiwattanawong

Junchompoo²,

Sakornwimon³

et al. 2020

Diversity and Distributions

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Section: Introductionmentioning

confidence: 99%

Mapping habitat protection priority over a marine ecoregion under information gaps

Kittiwattanawong

Junchompoo²,

Sakornwimon³

et al. 2020

Diversity and Distributions

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“…Different aspects of the ichthyic community have been assessed in relation to restoration processes, primarily those considering the structure and composition of species (e.g., Trexler and Goss, 2009;Arceo-Carranza et al, 2016;Enchelmaier et al, 2020;Soria-Barreto et al, 2021). Nonetheless, these results only reflect the importance of mangrove ecosystems as refuge (Kovalenko et al, 2019;Le Guen et al, 2019). Recently, the importance in including the trophic interactions among fish and its preys has been proposed as an indirect tool useful to assess the conservation and restoration status of mangrove ecosystems, because of its high connectivity to terrestrial and marine environments and process related to the maintenance of biodiversity and functions at different scales (Palmer et al, 1997;Vander Zanden et al, 2016;Hale et al, 2019;Loch et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Estuarine Fish Feeding Changes as Indicator to Mangrove Restoration Success in Seasonal Karstic Wetlands

Hernández-Mendoza

Escalera-Vázquez²,

Arceo-Carranza³

2022

Front. For. Glob. Change

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The loss of mangrove areas due to anthropogenic activities has triggered efforts to recover or restore these ecosystems, their functions, and associated diversity. Such functions include nursery areas and energy flow through trophic relationships for a large variety of inhabitant species (e.g., fish). The food webs and trophic dynamics of estuarine fish provide important information on the food resources in mangrove ecosystems and their response to restoration processes. Nonetheless, few studies focus on using fish feeding characteristics as an approximation to assess the conservation or recovery status of these aquatic ecosystems. Thus, the aim of the present study was to compare the trophic dynamics of an ichthyic community in a mangrove ecosystem related to karstic wetlands in the Mexican–Caribbean using freshwater, estuarine, and marine fish species as bioindicators of the restoration process in mangroves. Stomach contents were analyzed for eight species of fish inhabiting specific mangrove zones (1—conserved zone, and 2—restored zone; a zone exposed to ecological restoration processes due to impacts of anthropic activities) related to karstic wetlands in the Mexican–Caribbean. Four feeding characteristics were considered: trophic guild, trophic level, feeding strategy, and prey abundance. Results showed differences and changes in the use of food sources at the trophic level mainly for Floridichthys polyommus, changing from a secondary consumer in the conserved zones to a primary consumer in the restored zones. This suggests that the feeding characteristics of the inhabiting fish are related to the mangrove’s conservation/restoration status and the trophic dynamics in the community. The results of this study are relevant as a tool for mangrove restoration plans regarding the analysis of fish and their food prey, in order to perform an easy and rapid assessment to determine the conservation/restoration status of these aquatic ecosystems from a functional perspective.

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“…Such network analyses are now proposed as components of aquatic ecosystem assessments. Some indices, mainly derived from the ecological network analysis (ENA; Fath et al, 2007;Kones et al, 2009;Saint-Béat et al, 2015;Ulanowicz, 2004), are being considered to be implemented into environmental directives (Le Guen et al, 2019;Safi et al, 2019) or ecosystem-based management strategies (Mulder et al, 2017;Raoux et al, 2018Raoux et al, , 2019. Furthermore, food-web modelling is an important tool to describe and quantify trophic transfer of contaminants (De Laender et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

ESCROpath, a Bayesian mixing model to quantify diets and trophic flows in aquatic food webs

et al. 2022

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1. Food-web modelling is a key tool to provide a global and comprehensive knowledge on community structure, biodiversity and ecosystem processes and functioning. In particular, it allows computing integrative and holistic indices describing food web characteristics, topology and functioning. However, one of the main sources of uncertainty in most food-web models is the estimation of diet matrices.2. In the present work, we propose an innovative approach that combines (a) a Bayesian mixing model using both isotopes and contaminants as chemical tracers with (b) classical mass-balance equations. This dual approach allows the simultaneous estimation of diet composition, isotopic enrichment, contaminant biomagnification, and contaminants and biomass flows in the whole food web. This original model named ESCROpath also provides food-web indices derived from ecological network analysis (ENA). As a case study, the approach was implemented in the Gironde estuarine food web (SW France) for which isotopes, contaminants and trophic data exist. Two sets of priors were constructed accounting for more or less uncertainty in trophic parameter estimates. Outputs were compared with previous published Ecopath results. A constrained calibration led to very similar outputs as Ecopath (which showsthat the method is able to find the initial set of parameters if it is forced to do so), whereas a free calibration led to slight differences in trophic parameters and ENA indice estimations (which shows that the Ecopath solution was not fully optimal). Quite different diet matrices and estimations of flows distribution within the food web can thus be obtained. 4. ESCROpath is an original flexible food-web modelling tool that, for the first time, makes it possible to go from a model mainly built on an 'estimate' of the parameters based on expert knowledge (which constitutes the main criticism formulated against Ecopath) to a statistical Bayesian framework for the estimation of the trophic parameters. It thus provides a very integrated framework for | 895 Methods in Ecology and Evoluঞon LOBRY et al.

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Assessing the ecological status of an estuarine ecosystem: linking biodiversity and food-web indicators

Cited by 19 publications

References 80 publications

Mapping habitat protection priority over a marine ecoregion under information gaps

Mapping habitat protection priority over a marine ecoregion under information gaps

Estuarine Fish Feeding Changes as Indicator to Mangrove Restoration Success in Seasonal Karstic Wetlands

ESCROpath, a Bayesian mixing model to quantify diets and trophic flows in aquatic food webs

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