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• W4385411439 abstract "ABSTRACTSeabed-contact activities operating in the deep sea can generate sediment plumes that pose varying levels of threat to benthic fauna. Corals are important components of deep-sea ecosystems and can be particularly sensitive to elevated suspended sediment concentrations. In this study, we exposed colony fragments of the New Zealand deep-sea scleractinian Goniocorella dumosa to four-day pulses of four target sediment concentrations: 0 mg l−1 (representing control conditions) and 45, 102 and 435 mg l−1 (targeting concentrations expected from mining and trawling disturbance). All coral fragments survived. Oxygen consumption rates were not affected by treatments and time. No visible detrimental effects on coral health were noted after the first pulse of sediment exposure. However, both a loss of coenosarc and instances of polyp mortality were observed on fragments exposed to suspended sediments during the following sediment pulses. This observed decline in coral health over time indicates that G. dumosa could cope with sediment disturbance from human activities that disturb the seafloor for periods of up to four days, but that repeated, or prolonged sediment exposure could cause a deterioration in the health condition of this species. This hypothesis should be further investigated in following studies.KEYWORDS: Coralsdeep seaseabed miningtrawlingsedimentationrespiration rates AcknowledgmentsWe would like to thank Neville Higgison (Victoria University of Wellington, VUW) for building the respiration chambers; Neill Barr and Jennifer Beaumont (National Institute of Water and Atmospheric Research, NIWA) for designing the experimental chambers, Graeme Moss (NIWA) for helping with the setup of the experiment; Peter Marriott and Rob Stewart (NIWA) for assisting with the photography set up. We also acknowledge the crew on board RV Tangaroa Voyage TAN1903 for their help with the live specimen samples. Ship time for the voyage was awarded by the Tangaroa Reference Group (TRG) and funded by the Ministry for Business, Innovation and Employment (MBIE) (MBIE contract CO1X1614). This research study was funded by both a Victoria University of Wellington doctoral scholarship and the ‘Resilience of benthic communities to the effects of sedimentation’ (ROBES) programme.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by Ministry of Business, Innovation and Employment." @default.
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• W4385411439 date "2023-07-31" @default.
• W4385411439 modified "2023-09-27" @default.
• W4385411439 title "Effects of sediment pulses on the deep-sea coral <i>Goniocorella dumosa</i>" @default.
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• W4385411439 doi "https://doi.org/10.1080/00288330.2023.2230154" @default.
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