title: Ecology of a key ecosystem engineer on hard coastal infrastructure and natural rocky shores.
abstract: The numbers of hard coastal artificial structures is increasing worldwide and there is now cumulative evidence that they support assemblages that are less diverse than natural shores. Here we investigated patterns of distribution and demography of the native barnacle Chthamalus stellatus on hard coastal structures and on natural rocky shores. Barnacles were 35% less abundant on hard structures regardless of substratum type (concrete or basalt). On a subset of sites we found that temporal population stability, growth and mortality were similar on natural rocky shores and hard structures. In contrast, barnacles were significantly larger and recruited more onto natural rocky shores. These results emphasise the important role of recruitment in determining the abundance of a key space occupier on hard coastal structures. Experimental work building on these results may generate insights that can be used as guidelines for the management of urbanised coastal areas.
authors.affiliation: Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal; cE3c-Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group - Universidade dos Açores, Rua da Mãe de Deus 13A, 9501-801 Ponta Delgada, Azores, Portugal. Electronic address: gustavo.om.martins@uac.pt.
authors.forename: Gustavo M
authors.initials: GM
authors.lastname: Martins
authors.affiliation: cE3c-Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group - Universidade dos Açores, Rua da Mãe de Deus 13A, 9501-801 Ponta Delgada, Azores, Portugal.
authors.forename: Ana I
authors.initials: AI
authors.lastname: Neto
authors.affiliation: cE3c-Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group - Universidade dos Açores, Rua da Mãe de Deus 13A, 9501-801 Ponta Delgada, Azores, Portugal.
authors.forename: Eva
authors.initials: E
authors.lastname: Cacabelos
mesh_terms: D000818:Animals; D001394:Azores; D017753:Ecosystem; D055593:Geological Phenomena; D011157:Population Dynamics; D001468:Thoracica / Q000502:physiology*; D013997:Time Factors
keywords: Barnacle; Chthamalus stellatus; Coastal zone; Demography; Patterns of distribution; Populations; Recruitment; Urbanisation