A global synthesis reveals gaps in coastal habitat restoration research

Coastal ecosystems have drastically declined in coverage and condition across the globe. To combat these losses, marine conservation has recently employed habitat restoration as a strategy to enhance depleted coastal... [ view full abstract ]

Coastal ecosystems have drastically declined in coverage and condition across the globe. To combat these losses, marine conservation has recently employed habitat restoration as a strategy to enhance depleted coastal ecosystems. For restoration to be a successful enterprise, however, it is necessary to identify and address potential knowledge gaps and review whether the field has tracked scientific advances regarding best practices. In doing so, managers, researchers, and practitioners alike may more readily establish restoration priorities and goals. We synthesized peer-reviewed, published literature on habitat restoration research in salt marshes, oyster reefs, and seagrasses to address three questions related to restoration efforts: i) how frequent is cross-sector authorship (i.e. University, NGO, or GO) in coastal restoration research; ii) what is the geographic distribution of coastal restoration research; and, iii) are abiotic and biotic factors equally emphasized in the literature and how does this vary with time? Our vote-count survey indicated that one-third of the journal-published studies listed authors from at least two sectors. Across all habitat types, there was a dearth of studies from Africa, Asia and South America. Finally, despite many experimental studies demonstrating that species interactions can greatly affect the recovery and persistence of coastal foundation species, only one-fourth of the studies we examined discussed their effects on restoration. Combined, our results reveal gaps and discrepancies in research and emphasis that should be addressed in order to further propel coastal restoration science.