Articles
Synthesis of the main impacts of coastal realignment on biodiversity – a systematic review
Received : 25 October 2022;
Published : 7 December 2022
References
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Abstract
During the Life project Adapto, a systematic review was conducted to study the consequences of coastal realignment on biodiversity. The present document is a synthesis of this review. It focuses on the characteristics of the sites that have been realigned, in particular on their location, history and type of realignment. The different study designs implemented to study the impact of such an intervention are also presented, highlighting that studies are mainly short-term and are sometimes lacking rigor in the implementation of appropriate experimental designs. Taxonomic groups are unequally studied, vegetation being the most studied one, while mammals, reptiles, amphibians and microorganisms are more rarely considered. Studies also focus on compositional parameters (species richness, abundance) at the detriment of structural (e.g. sex ratio, age distribution.) and functional (e.g. fertility, mortality, etc.) parameters. The review highlighted that coastal realignment generally leads to a decrease in the richness of plants, and an increase in the richness of invertebrates (macrocrustacean excepted) and in the abundance of fishes and shorebirds. Several factors of different types (e.g. biotic, edaphic, anthropic) can explain these results.
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