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Benthic uptake of phytoplankton and ocean-reef exchange of particulate nutrients on a tide-dominated reef

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dc.contributor Australian Inst Marine Sci
dc.contributor Arc Ctr Excellence Coral Reef Studies
dc.contributor University Of Western Australia
dc.contributor Oceans Inst
dc.contributor Univ Western Australia
dc.contributor Australian Institute Of Marine Science
dc.contributor Sch Earth Sci FALTER, JAMES L. GRUBER, RENEE K. LOWE, RYAN J. 2018-08-26T18:21:06Z 2018-08-26T18:21:06Z 2020-07-20T00:21:55Z 2018-08-26T18:21:06Z 2018-08-26T18:21:06Z 2020-07-20T00:21:55Z 2018-07-01
dc.identifier.citation Gruber RK, Lowe RJ, Falter JL (2018) Benthic uptake of phytoplankton and ocean-reef exchange of particulate nutrients on a tide-dominated reef. Limnology and Oceanography 63: 1545-1561
dc.identifier.issn 0024-3590
dc.description.abstract Benthic fluxes of chlorophyll a (Chl a) and particulate organic carbon (POC) and nitrogen (PON) were quantified on Tallon reef, a strongly tide-dominated (spring range > 8 m) reef located in the Kimberley region of northwestern Australia, over a 2-week period. Extensive hydrodynamic observations were used to construct a reef-scale mass balance to estimate material exchange between the reef and ocean over individual tidal cycles. Additionally, a one-dimensional control volume approach was used to estimate fluxes of Chl a in waters traversing the reef platform. Particulate material was delivered to the reef platform in a pulse during flood tide, and benthic uptake of Chl a declined to negligible values toward the end of ebb tide. On the scale of tidal cycles, a net uptake of Chl a was observed on the reef platform (on average 1.3 mg Chl a m(-2) d(-1)), which was lower than previous studies of many reef communities. Fluxes showed variability depending on the magnitude of individual tidal cycles, which was likely related to volumes of oceanic Chl a inputs. Tallon reef was a net source of detrital POC and PON to the surrounding coastal ocean, with average POC exports similar to 3% of the reef's benthic gross primary production. Seasonal measurements of water quality reported here are among the first records for the coastal Kimberley, and suggest that reefs in the west Kimberley may experience naturally elevated levels of phytoplankton and particulate nutrients, especially during the wet season.
dc.description.sponsorship Our team would like to acknowledge the Bardi Jawi, the Traditional Owners both past and present, who continue to care for this country. Thanks to the Bardi Jawi Rangers and staff of the Kimberley Marine Research Station for their help and local knowledge on three field trips. We are grateful for field assistance provided by Michael Cuttler, Jordan Iles, Miela Kolomaznik, and Leonardo Ruiz-Montoya. Comments by two anonymous reviewers substantially clarified and improved earlier drafts of this paper. This work was funded by the Western Australian Marine Science Institution's Kimberley Marine Research Program (Project 2.2.3), an Australian Research Council's Future Fellowship (FT110100201) to RJL, and the ARC Centre of Excellence for Coral Reef Studies (CE140100020).
dc.language English
dc.subject Great-barrier-reef
dc.subject Marine & Freshwater Biology
dc.subject Fringing Coral-reef
dc.subject Oceanography
dc.subject Organic-carbon
dc.subject Water-quality
dc.subject Lizard-island
dc.subject Australia
dc.subject Scleractinian Corals
dc.subject Matter
dc.subject C-n-p
dc.subject Lagoon
dc.subject Limnology
dc.title Benthic uptake of phytoplankton and ocean-reef exchange of particulate nutrients on a tide-dominated reef
dc.type journal article
dc.identifier.doi 10.1002/lno.10790
dc.identifier.wos WOS:000440928800007

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