IDEAS home Printed from https://ideas.repec.org/a/eee/ecomod/v232y2012icp1-13.html
   My bibliography  Save this article

Modelling trophic flows in ecosystems to assess the efficiency of marine protected area (MPA), a case study on the coast of Sénégal

Author

Listed:
  • Colléter, Mathieu
  • Gascuel, Didier
  • Ecoutin, Jean-Marc
  • Tito de Morais, Luis

Abstract

Marine protected areas (MPAs) are now viewed as an efficient tool to fight against the global deterioration of habitats and fish populations. However their efficiency and effects on the whole trophic network are little known. Based on the Bolong de Bamboung (Sénégal) case study, the objective of this study is to assess the impact of a MPA on the entire trophic network using trophodynamic models. This estuarine small MPA is scientifically surveyed since 2003, one year before the closure of the fishery. Using the resulting dataset, we calculated time series of abundance indices and constructed two Ecopath mass-balanced models for the year 2003 (fished) and the 2006–2008 period (unfished). Using EcoTroph, an ecosystem trophic-level based model, we compared the two periods and simulated a closure of the fishery starting from 2003 to assess the effect of the MPA. We observed a rather constant total biomass, but a biomass increase by a 2.5 factor in predators and a decrease by a 1.7 factor in their preys. Simulations showed that the increase in predators was too important to only being a direct consequence of the removal of the fishing mortality and a local production. This highlighted the role of the MPA as a refuge or a foraging arena for some predator species. What's more, the decrease of the preys, corresponding to pelagic species, was very important and couldn’t be explained only by an increase of the predation plus a release of the fishing pressure. This indicated other possible effects as environmental and behavioural ones, in addition of a direct MPA effect. Sensitivity testing and a comparison with another nearby similar but fished area, the Bolong de Sangako, validated the same global conclusion. We concluded that the fishing closure had direct effects but also indirect ones likely due to fish behaviour and environment, and that trophodynamic models are useful tools to analyse MPA effects on the whole trophic network.

Suggested Citation

  • Colléter, Mathieu & Gascuel, Didier & Ecoutin, Jean-Marc & Tito de Morais, Luis, 2012. "Modelling trophic flows in ecosystems to assess the efficiency of marine protected area (MPA), a case study on the coast of Sénégal," Ecological Modelling, Elsevier, vol. 232(C), pages 1-13.
    • Handle: RePEc:eee:ecomod:v:232:y:2012:i:c:p:1-13
    DOI: 10.1016/j.ecolmodel.2012.01.019
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0304380012000397
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.ecolmodel.2012.01.019?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Milessi, Andrés C. & Danilo, Calliari & Laura, Rodríguez-Graña & Daniel, Conde & Javier, Sellanes & Rodríguez-Gallego, Lorena, 2010. "Trophic mass-balance model of a subtropical coastal lagoon, including a comparison with a stable isotope analysis of the food-web," Ecological Modelling, Elsevier, vol. 221(24), pages 2859-2869.
    2. Gascuel, Didier & Pauly, Daniel, 2009. "EcoTroph: Modelling marine ecosystem functioning and impact of fishing," Ecological Modelling, Elsevier, vol. 220(21), pages 2885-2898.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Deehr, Rebecca A. & Luczkovich, Joseph J. & Hart, Kevin J. & Clough, Lisa M. & Johnson, Beverly J. & Johnson, Jeffrey C., 2014. "Using stable isotope analysis to validate effective trophic levels from Ecopath models of areas closed and open to shrimp trawling in Core Sound, NC, USA," Ecological Modelling, Elsevier, vol. 282(C), pages 1-17.
    2. Berrios, Fernando & Campbell, Daniel E. & Ortiz, Marco, 2017. "Emergy evaluation of benthic ecosystems influenced by upwelling in northern Chile: Contributions of the ecosystems to the regional economy," Ecological Modelling, Elsevier, vol. 359(C), pages 146-164.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Han, Jeong-Ho & Kumar, Hema K. & Lee, Jae Hoon & Zhang, Chang-Ik & Kim, Se-Wha & Lee, Jung-Ho & Kim, Sang Don & An, Kwang-Guk, 2011. "Integrative trophic network assessments of a lentic ecosystem by key ecological approaches of water chemistry, trophic guilds, and ecosystem health assessments along with an ECOPATH model," Ecological Modelling, Elsevier, vol. 222(19), pages 3457-3472.
    2. Deehr, Rebecca A. & Luczkovich, Joseph J. & Hart, Kevin J. & Clough, Lisa M. & Johnson, Beverly J. & Johnson, Jeffrey C., 2014. "Using stable isotope analysis to validate effective trophic levels from Ecopath models of areas closed and open to shrimp trawling in Core Sound, NC, USA," Ecological Modelling, Elsevier, vol. 282(C), pages 1-17.
    3. Colléter, Mathieu & Valls, Audrey & Guitton, Jérôme & Gascuel, Didier & Pauly, Daniel & Christensen, Villy, 2015. "Global overview of the applications of the Ecopath with Ecosim modeling approach using the EcoBase models repository," Ecological Modelling, Elsevier, vol. 302(C), pages 42-53.
    4. Heneghan, Ryan F. & Everett, Jason D. & Sykes, Patrick & Batten, Sonia D. & Edwards, Martin & Takahashi, Kunio & Suthers, Iain M. & Blanchard, Julia L. & Richardson, Anthony J., 2020. "A functional size-spectrum model of the global marine ecosystem that resolves zooplankton composition," Ecological Modelling, Elsevier, vol. 435(C).
    5. Tecchio, Samuele & Rius, Armonie Tous & Dauvin, Jean-Claude & Lobry, Jérémy & Lassalle, Géraldine & Morin, Jocelyne & Bacq, Nicolas & Cachera, Marie & Chaalali, Aurélie & Villanueva, Maria Ching & Niq, 2015. "The mosaic of habitats of the Seine estuary: Insights from food-web modelling and network analysis," Ecological Modelling, Elsevier, vol. 312(C), pages 91-101.
    6. Du, Jianguo & Cheung, William W.L. & Zheng, Xinqing & Chen, Bin & Liao, Jianji & Hu, Wenjia, 2015. "Comparing trophic structure of a subtropical bay as estimated from mass-balance food web model and stable isotope analysis," Ecological Modelling, Elsevier, vol. 312(C), pages 175-181.
    7. Steenbeek, Jeroen & Buszowski, Joe & Christensen, Villy & Akoglu, Ekin & Aydin, Kerim & Ellis, Nick & Felinto, Dalai & Guitton, Jerome & Lucey, Sean & Kearney, Kelly & Mackinson, Steven & Pan, Mike & , 2016. "Ecopath with Ecosim as a model-building toolbox: Source code capabilities, extensions, and variations," Ecological Modelling, Elsevier, vol. 319(C), pages 178-189.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:ecomod:v:232:y:2012:i:c:p:1-13. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/ecological-modelling .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.