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Title

Assessing the effectiveness of restoration actions for Bryozoans: The case of the Mediterranean Pentapora fascialis

AuthorsPagès-Escolà, Marta; Linares, Cristina ; Gómez-Gras, D. ; Medrano, Alba; Hereu, Bernat
KeywordsBenthos
Coastal
Fishing
Invertebrates
Monitoring
Recovery
Recreation
Issue DateJan-2020
PublisherJohn Wiley & Sons
CitationAquatic Conservation: Marine and Freshwater Ecosystems 30(1): 8-19 (2020)
Abstract1. Marine ecosystems are highly affected by several human stressors. In this context, beyond passive restoration measures such as the creation of marine protected areas, it is urgent that we explore active restoration measures to enhance and accelerate the recovery of sessile marine species. 2. Bryozoans are among the most common sessile invertebrates in rocky bottom ecosystems and are considered habitat‐forming species that are highly vulnerable to physical disturbances, such as recreational diving, ghost fishing nets, and global warming, which makes them highly vulnerable to other impacts. Despite their ecological importance and vulnerability, to date restoration actions for bryozoans have rarely been explored. 3. In this study, different restoration techniques were developed and tested, with a focus on two types of effective methodologies previously applied to other marine invertebrates: recruitment enhancement and the transplantation of adult colonies, in both cases using the Mediterranean bryozoan Pentapora fascialis as a model species. 4. First, different types of artificial surfaces were installed in different coralligenous habitats to test the enhancement of recruitment, concluding that plastic grids are the best substrate in terms of facilitating the recruitment of new bryozoan colonies. 5. Second, different methodologies were tested for adult transplantation. The most successful was to fix colonies to a suitable substrate with a nylon thread attached to the colony ex situ (i.e. on the boat). 6. Using this technique a trial restoration programme was undertaken, involving transplanting adult colonies collected from a ghost fishing net trapped on the bottom, which showed a high survival rate of ~50% after 6 months. 7. The low economic cost of the implementation of the proposed techniques as well as the successful results obtained highlight the viability of restoring bryozoan populations over long temporal and spatial scales
Description12 pages, 6 figures, 1 table, supporting information https://doi.org/10.1002/aqc.3236
Publisher version (URL)https://doi.org/10.1002/aqc.3236
URIhttp://hdl.handle.net/10261/199837
Identifiersdoi: 10.1002/aqc.3236
issn: 1052-7613
e-issn: 1099-0755
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