Ecological determinants of intertidal recruitment and metacommunity structure on the Atlantic coast of Nova Scotia
- Subject Areas
- Biodiversity, Biogeography, Ecology, Marine Biology, Zoology
- intertidal, recruitment, barnacle, mussel, dogwhelk, Semibalanus, Mytilus, Nucella, benthic-pelagic coupling, bottom-up forcing
- © 2018 Scrosati et al.
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2018. Ecological determinants of intertidal recruitment and metacommunity structure on the Atlantic coast of Nova Scotia. PeerJ Preprints 6:e26888v1 https://doi.org/10.7287/peerj.preprints.26888v1
Rocky-intertidal species are often distributed as metacommunities along marine shores, as rocky habitats are patchy. Nearshore pelagic conditions often explain variation among the local communities, but most studies have been done on eastern ocean boundary coasts. We investigated potential drivers of intertidal metacommunity structure on the Atlantic coast of Nova Scotia. We studied the high intertidal zone of nine wave-exposed bedrock locations spanning 415 km of coastline. At each location in the spring, we measured the recruitment of barnacles and mussels, the two predominant sessile invertebrates. Satellite data on coastal phytoplankton abundance and particulate organic carbon (food supply for intertidal filter-feeders) and in-situ data on coastal seawater temperature explained to varying degrees the geographic structure of recruitment. In turn, the summer abundance of both filter-feeders was positively related to their spring recruitment. Ultimately, predator (dogwhelk) abundance increased with the recruitment and abundance of barnacles and mussels (the main prey of dogwhelks), suggesting that bottom-up forcing influences metacommunity structure on this coast. Sea ice constituted an overlapping source of variation. Drift ice leaving the Gulf of St. Lawrence in late winter disturbed intertidal communities in the northern locations, limiting local biodiversity compared with central and southern locations.
This abstract is part of the WCMB Collection. It is an abstract submitted to the World Conference on Marine Biodiversity 2018.