Space invaders; biological invasions in marine conservation planning

Last modified: 
February 9, 2017 - 1:19am
Type: Journal Article
Year of publication: 2016
Date published: 10/2016
Authors: Sylvaine Giakoumi, François Guilhaumon, Salit Kark, Antonio Terlizzi, Joachim Claudet, Serena Felline, Carlo Cerrano, Marta Coll, Roberto Danovaro, Simonetta Fraschetti, Drosos Koutsoubas, Jean-Batiste Ledoux, Tessa Mazor, Bastien Mérigot, Fiorenza Micheli, Stelios Katsanevakis
Journal title: Diversity and Distributions
Volume: 22
Issue: 12
Pages: 1220 - 1231


Biological invasions are major contributors to global change and native biodiversity decline. However, they are overlooked in marine conservation plans. Here, we examine for the first time the extent to which marine conservation planning research has addressed (or ignored) biological invasions. Furthermore, we explore the change of spatial priorities in conservation plans when different approaches are used to incorporate the presence and impacts of invasive species.


Global analysis with a focus on the Mediterranean Sea region.


We conducted a systematic literature review consisting of three steps: (1) article selection using a search engine, (2) abstract screening and (3) review of pertinent articles, which were identified in the second step. The information extracted included the scale and geographical location of each case study as well as the approach followed regarding invasive species. We also applied the software Marxan to produce and compare conservation plans for the Mediterranean Sea that either protect, or avoid areas impacted by invasives, or ignore the issue. One case study focused on the protection of critical habitats, and the other on endemic fish species.


We found that of 119 papers on marine spatial plans in specific biogeographic regions, only three (2.5%) explicitly took into account invasive species. When comparing the different conservation plans for each case study, we found that the majority of selected sites for protection (ca. 80%) changed in the critical habitat case study, while this proportion was lower but substantial (27%) in the endemic fish species case study.

Main conclusions

Biological invasions are being widely disregarded when planning for conservation in the marine environment across local to global scales. More explicit consideration of biological invasions can significantly alter spatial conservation priorities. Future conservation plans should explicitly account for biological invasions to optimize the selection of marine protected areas.

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