Temporal changes in deep-sea sponge populations are correlated to changes in surface climate and food supply

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Kahn, A. S., Ruhl, H. A., & Smith, K. L. (2012). Temporal changes in deep-sea sponge populations are correlated to changes in surface climate and food supply. Deep-Sea Research Part I: Oceanographic Research Papers, 70, 36-41. doi:10.1016/j.dsr.2012.08.001
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TitleTemporal changes in deep-sea sponge populations are correlated to changes in surface climate and food supply
AuthorsA. Kahn, H. Ruhl, K. Smith
AbstractDensity and average size of two species of abyssal sponges were analyzed at Station M (~4100. m depth) over an 18-year time-series (1989-2006) using camera sled transects. Both sponge taxa share a similar plate-like morphology despite being within different families, and both showed similar variations in density and average body size over time, suggesting that the same factors may control the demographics of both species. Peaks in significant cross correlations between increases in particulate organic carbon flux and corresponding increases in sponge density occurred with a time lag of 13 months. Sponge density also fluctuated with changes in two climate indices: the NOI with a time lag of 18 months and NPGO with a time lag of 15 months. The results support previous suggestions that increased particulate organic carbon flux may induce recruitment or regeneration in deep-sea sponges. It is unknown whether the appearance of young individuals results from recruitment, regeneration, or both, but the population responses to seasonal and inter-annual changes in food supply demonstrate that sponge populations are dynamic and are capable of responding to inter-annual changes despite being sessile and presumably slow-growing. © 2012 Elsevier Ltd.
JournalDeep-Sea Research Part I: Oceanographic Research Papers
Date2012
Volume70
Start page36
End page41
ISSN09670637 (ISSN)
SubjectsHexactinellida, NOI, NPGO, Particulate organic carbon, Pelagic-benthic coupling, Porifera, Food supply, abyssal zone, annual variation, body size, carbon flux, deep sea, morphology, population density, population structure, recruitment (population dynamics), regeneration, sessile species, sponge, temporal variation
NoteCited By (since 1996):4, Export Date: 24 September 2013, Source: Scopus, CODEN: DRORE

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