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dc.contributor.authorAllcock, A. Louise
dc.contributor.authorJohnson, Mark P.
dc.identifier.citationAllcock, A. Louise, & Johnson, Mark P. (2019). Interactions in the deep sea. In Stephen J. Hawkins, Katrin Bohn, Louise B. Firth, & Gray A. Williams (Eds.), Interactions in the Marine Benthos Global Patterns and Processes (Systematics Association Special Volume Series). Cambridge: Cambridge University Press.en_IE
dc.description.abstractThe deep–ocean floor extends over two thirds of the world’s surface, and is thus the largest benthic habitat on the planet. The myth of depauperate deep–sea communities was debunked in the 1960s by the pioneering work of Hessler and Sanders (Hessler and Sanders, 1967; Sanders and Hessler, 1969) with their newly developed epibenthic sled. They showed deep–sea diversity to be equivalent to that found in shallow tropical marine habitats, and greater than in boreal tropical and temperate estuaries and boreal shallow marine habitats. They also identified depth as the most important correlate of faunal abundance and as a factor driving community composition. Technological developments over the last 50 years have continued to drive advances in our knowledge of this diverse and heterogeneous biome. Efforts to enumerate and catalogue the diversity have led to claims of high levels of endemism (E.g., Wolff, 1970; Belyaev, 1989; Stocks and Hart, 2007; Ebbe et al., 2010) but poor knowledge of the global species pool and uneven regional sampling probably artifactually inflate these estimates (e.g., Rowden et al., 2010; Clark et al., 2012). The term “deep sea” encompasses many different habitats, shaped by their physical characteristics – geographic location, slope, depth – which determine their biodiversity and dominant fauna, and their connectivity. Here, we first explore biogeography and phylogeography of these habitats, and consider some of the molecular work which is testing various biogeographic schemes. We then look briefly at some of the abiotic parameters that characterise various deep-sea habitats. Interactions in the deep sea are many, but they are often not well investigated. Few studies on competition and predation match the detail of those conducted in shallow waters. In constrast, symbioses have been better researched, being the basis of much productivity at hydrothermal vents and cold seeps, and highly prevalent in filter-feeder dominated habitats on the steep slopes of submarine canyons and seamounts. Finally we explore where sufficient bodies of work exist to allow us to infer processes from patterns, and conclude that very much more work on ecological interactions in the deep-sea is needed.en_IE
dc.description.sponsorshipLA and MJ’s deep-sea research is supported by Science Foundation Ireland (SFI) and the Marine Institute under Investigators Programme Grant Number SFI/15/1A/3100 co-funded under the European Regional Development Fund 2014-2020.en_IE
dc.publisherCambridge University Pressen_IE
dc.relation.ispartofInteractions in the Marine Benthos: Global Patterns and Processesen
dc.subjectdeep seaen_IE
dc.subjectMarine Benthosen_IE
dc.subjectGlobal Patternsen_IE
dc.subjectGlobal Processesen_IE
dc.titleInteractions in the deep seaen_IE
dc.typeBook chapteren_IE
dc.description.peer-reviewedNot peer reviewed
dc.contributor.funderScience Foundation Irelanden_IE
dc.contributor.funderMarine Institute, Irelanden_IE
dc.contributor.funderEuropean Regional Development Funden_IE
dc.local.contactLouise Allcock, Zoology, 212, 2nd Floor, Martin Ryan Institute, South Campus. 2322 Email:
dcterms.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/15/IA/3100/IE/Exploiting and conserving deep-sea genetic resources/en_IE

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