Abstract：
:The present study analyses the composition, structure and trophic function of epibenthic assemblages in two artificial reefs (ARs) 16 years after deployment and in nearby natural reefs (NRs), aiming at providing insights on the complementarity between both habitats. Current findings suggest that after 16 years the ARs (concrete blocks), located in southern Portugal, do not act as surrogates for NRs, as epibenthic assemblages differed between reef types in composition, structure and trophic function. NRs showed higher diversity and complementarity (i.e. beta-diversity) than ARs, evidencing higher redundancy. Higher heterogeneity within NRs was also evidenced by the multi-dimensional scaling analysis based on abundance, biomass and trophic composition. NRs presented higher abundance of molluscs and biomass of sponges, resulting in differences in the trophic function: suspension-feeding dominated the NRs, while within ARs there was an ascendency of carnivory. Although not acting as surrogates for NRs and provided that no adverse effects (e.g. establishment of non-native species) were detected, ARs may have a significant contribution for the increase of regional diversity, as evidenced by the highest complementarity levels observed between assemblages in both reefs.
journal_name
Mar Environ Resjournal_title
Marine environmental researchauthors
Carvalho S,Moura A,Cúrdia J,Cancela da Fonseca L,Santos MNdoi
10.1016/j.marenvres.2013.09.013subject
Has Abstractpub_date
2013-12-01 00:00:00pages
170-7eissn
0141-1136issn
1879-0291pii
S0141-1136(13)00163-3journal_volume
92pub_type
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