Nicholas Polunin | Newcastle University (original) (raw)
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Papers by Nicholas Polunin
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Journal of Marine Systems, Nov 1, 2014
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Journal of Marine Systems, Oct 1, 2014
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Marine Ecology Progress Series, Sep 29, 2015
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Philosophical Transactions of the Royal Society B, Nov 27, 2010
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Journal of Experimental Marine Biology and Ecology, Nov 1, 2007
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Scientific Reports
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Scientific Reports, 2021
We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Isla... more We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Islands, French Polynesia, characterized by low coral cover, high sea surface temperature and meso- to eutrophic waters. The Marquesas constitute a relevant ecosystem to understand the functioning of low diversity reefs that are also subject to global change. A multi-tracer assessment of organic matter pathways was run to delineate ecosystem functioning, using analysis of fatty acids, bulk and compound specific stable isotope analysis and stable isotopes mixing models. Macroalgae and phytoplankton were the two major food sources fueling this food web with, however, some marked seasonal variations. Specifically, zooplankton relied on phytoplankton-derived organic matter and herbivorous fishes on macroalgae-derived organic matter to a much higher extent in summer than in winter (~ 75%vs. ~ 15%, and ~ 70 to 75%vs. ~ 5 to 15%, respectively) . Despite remarkably high δ15N values for all trophic c...
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Science Advances, 2021
Coral reef predators are overwhelmingly sustained by offshore pelagic plankton sources rather tha... more Coral reef predators are overwhelmingly sustained by offshore pelagic plankton sources rather than by reef-based sources.
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Royal Society Open Science, 2019
Faunal assemblages at hydrothermal vents associated with island-arc volcanism are less well known... more Faunal assemblages at hydrothermal vents associated with island-arc volcanism are less well known than those at vents on mid-ocean ridges and back-arc spreading centres. This study characterizes chemosynthetic biotopes at active hydrothermal vents discovered at the Kemp Caldera in the South Sandwich Arc. The caldera hosts sulfur and anhydrite vent chimneys in 1375–1487 m depth, which emit sulfide-rich fluids with temperatures up to 212°C, and the microbial community of water samples in the buoyant plume rising from the vents was dominated by sulfur-oxidizing Gammaproteobacteria. A total of 12 macro- and megafaunal taxa depending on hydrothermal activity were collected in these biotopes, of which seven species were known from the East Scotia Ridge (ESR) vents and three species from vents outside the Southern Ocean. Faunal assemblages were dominated by large vesicomyid clams, actinostolid anemones, Sericosura sea spiders and lepetodrilid and cocculinid limpets, but several taxa abunda...
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Journal of Animal Ecology, 2018
Pelagic and benthic systems usually interact, but their dynamics and production rates differ. Suc... more Pelagic and benthic systems usually interact, but their dynamics and production rates differ. Such differences influence the distribution, reproductive cycles, growth rates, stability and productivity of the consumers they support. Consumer preferences for, and dependence on, pelagic or benthic production are governed by the availability of these sources of production and consumer life history, distribution, habitat, behavioural ecology, ontogenetic stage and morphology. Diet studies may demonstrate the extent to which consumers feed on prey in pelagic or benthic environments. But they do not discriminate benthic production directly supported by phytoplankton from benthic production recycled through detrital pathways. The former will track the dynamics of phytoplankton production more closely than the latter. We develop and apply a new analytical method that uses carbon (C) and sulphur (S) natural abundance stable isotope data to assess the relative contribution of pelagic and benth...
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Food Webs, 2017
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Journal of Experimental Marine Biology and Ecology, 2017
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Marine Ecology Progress Series, 2016
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Marine Ecology Progress Series, 1997
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MicrobiologyOpen, 2014
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PLoS ONE, 2013
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Journal of Marine Systems, Nov 1, 2014
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Journal of Marine Systems, Oct 1, 2014
Bookmarks Related papers MentionsView impact
Marine Ecology Progress Series, Sep 29, 2015
Bookmarks Related papers MentionsView impact
Philosophical Transactions of the Royal Society B, Nov 27, 2010
Bookmarks Related papers MentionsView impact
Journal of Experimental Marine Biology and Ecology, Nov 1, 2007
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Scientific Reports
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Scientific Reports, 2021
We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Isla... more We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Islands, French Polynesia, characterized by low coral cover, high sea surface temperature and meso- to eutrophic waters. The Marquesas constitute a relevant ecosystem to understand the functioning of low diversity reefs that are also subject to global change. A multi-tracer assessment of organic matter pathways was run to delineate ecosystem functioning, using analysis of fatty acids, bulk and compound specific stable isotope analysis and stable isotopes mixing models. Macroalgae and phytoplankton were the two major food sources fueling this food web with, however, some marked seasonal variations. Specifically, zooplankton relied on phytoplankton-derived organic matter and herbivorous fishes on macroalgae-derived organic matter to a much higher extent in summer than in winter (~ 75%vs. ~ 15%, and ~ 70 to 75%vs. ~ 5 to 15%, respectively) . Despite remarkably high δ15N values for all trophic c...
Bookmarks Related papers MentionsView impact
Science Advances, 2021
Coral reef predators are overwhelmingly sustained by offshore pelagic plankton sources rather tha... more Coral reef predators are overwhelmingly sustained by offshore pelagic plankton sources rather than by reef-based sources.
Bookmarks Related papers MentionsView impact
Royal Society Open Science, 2019
Faunal assemblages at hydrothermal vents associated with island-arc volcanism are less well known... more Faunal assemblages at hydrothermal vents associated with island-arc volcanism are less well known than those at vents on mid-ocean ridges and back-arc spreading centres. This study characterizes chemosynthetic biotopes at active hydrothermal vents discovered at the Kemp Caldera in the South Sandwich Arc. The caldera hosts sulfur and anhydrite vent chimneys in 1375–1487 m depth, which emit sulfide-rich fluids with temperatures up to 212°C, and the microbial community of water samples in the buoyant plume rising from the vents was dominated by sulfur-oxidizing Gammaproteobacteria. A total of 12 macro- and megafaunal taxa depending on hydrothermal activity were collected in these biotopes, of which seven species were known from the East Scotia Ridge (ESR) vents and three species from vents outside the Southern Ocean. Faunal assemblages were dominated by large vesicomyid clams, actinostolid anemones, Sericosura sea spiders and lepetodrilid and cocculinid limpets, but several taxa abunda...
Bookmarks Related papers MentionsView impact
Journal of Animal Ecology, 2018
Pelagic and benthic systems usually interact, but their dynamics and production rates differ. Suc... more Pelagic and benthic systems usually interact, but their dynamics and production rates differ. Such differences influence the distribution, reproductive cycles, growth rates, stability and productivity of the consumers they support. Consumer preferences for, and dependence on, pelagic or benthic production are governed by the availability of these sources of production and consumer life history, distribution, habitat, behavioural ecology, ontogenetic stage and morphology. Diet studies may demonstrate the extent to which consumers feed on prey in pelagic or benthic environments. But they do not discriminate benthic production directly supported by phytoplankton from benthic production recycled through detrital pathways. The former will track the dynamics of phytoplankton production more closely than the latter. We develop and apply a new analytical method that uses carbon (C) and sulphur (S) natural abundance stable isotope data to assess the relative contribution of pelagic and benth...
Bookmarks Related papers MentionsView impact
Food Webs, 2017
Bookmarks Related papers MentionsView impact
Journal of Experimental Marine Biology and Ecology, 2017
Bookmarks Related papers MentionsView impact
Marine Ecology Progress Series, 2016
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Marine Ecology Progress Series, 1997
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MicrobiologyOpen, 2014
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PLoS ONE, 2013
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