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Mesoscale variation in the photophysiology of the reef building coral Pocillopora damicornis along an environmental gradient

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dc.contributor Australian Institute Of Marine Science
dc.contributor Dept Biol
dc.contributor Univ Copenhagen
dc.contributor University Of Copenhagen
dc.contributor Sch Marine & Trop Biol
dc.contributor University Of Western Australia
dc.contributor James Cook Univ
dc.contributor Univ Western Australia
dc.contributor James Cook University
dc.contributor Australian Inst Marine Sci
dc.contributor Arc Ctr Excellence Coral Reef Studies
dc.contributor Marine Biol Lab
dc.contributor Australian Institute Of Marine Science (aims) en
dc.contributor.author ULSTRUP, KARIN E.
dc.contributor.author COOPER, TIMOTHY F.
dc.date.accessioned 2017-03-21T01:23:44Z
dc.date.accessioned 2017-03-21T01:23:44Z
dc.date.accessioned 2013-02-28T06:51:25Z
dc.date.accessioned 2019-07-08T02:11:27Z
dc.date.available 2017-03-21T01:23:44Z
dc.date.available 2017-03-21T01:23:44Z
dc.date.available 2013-02-28T06:51:25Z
dc.date.available 2019-07-08T02:11:27Z
dc.date.issued 2009-06-20
dc.identifier 8087 en
dc.identifier.citation Cooper TF and Ulstrup KE (2009) Mesoscale variation in the photophysiology of the reef building coral Pocillopora damicornis along an environmental gradient. Estuarine Coastal and Shelf Science. 83: 186-196. en
dc.identifier.issn 0272-7714
dc.identifier.uri http://epubs.aims.gov.au/11068/8087
dc.description Link to abstract/full text - http://dx.doi.org/10.1016/j.ecss.2009.03.015 en
dc.description.abstract Spatial variation in the photophysiology of symbiotic dinoflagellates (zooxanthellae) of the scleractinian coral Pocillopora damicornis was examined along an environmental gradient in the Whitsunday Islands (Great Barrier Reef) at two depths (3 m and 6 m). Chlorophyll a fluorescence of photosystem II (PSII) and PAR-absorptivity measurements were conducted using an Imaging-PAM (pulse-amplitude-modulation) fluorometer. Most photophysiological parameters correlated with changes in environmental conditions quantified by differences in water quality along the gradient. For example, maximum quantum yield (F(v)/F(m)) increased and PAR-absorptivity decreased as water quality improved along the gradient from nearshore reefs (low irradiance, elevated nutrients and sediments) to outer islands (high irradiance, low nutrients and sediments). For apparent photosynthetic rate (PS(max)) and minimum saturating irradiance (E(k)), the direction of change differed depending on sampling depth, suggesting that different mechanisms of photo-acclimatisation operated between shallow and deep corals. Deep corals conformed to typical patterns of light/shade acclimatisation whereas shallow corals exhibited reduced PSmax and Ek with improving water quality coinciding with greater heat dissipation (NPQ(241)). Furthermore, deep corals on nearshore reefs exhibited elevated Q(241) in comparison to outer islands possibly due to effects of sedimentation and/or pollutants rather than irradiance. These results highlight the importance of mesoscale sampling to obtain useful estimates of the variability of photophysiological parameters, particularly if such measures are to be used as bioindicators of the condition of coral reefs. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
dc.description.uri http://dx.doi.org/10.1016/j.ecss.2009.03.015 en
dc.language English
dc.language en en
dc.relation.ispartof Null
dc.relation.ispartof Estuarine Coastal and Shelf Science - pages: 83: 186-196 en
dc.subject Great-barrier-reef
dc.subject Photosystem-ii
dc.subject Photosynthesis
dc.subject Water-quality
dc.subject Coastal Zone
dc.subject Inner-shelf
dc.subject Bioindicator
dc.subject Marine & Freshwater Biology
dc.subject Chlorophyll Fluorescence
dc.subject Photo-acclimatisation
dc.subject Rapid Light Curves
dc.subject Hermatypic Coral
dc.subject Zooxanthellae
dc.subject Oceanography
dc.subject Scleractinian Corals
dc.subject Stylophora-pistillata
dc.title Mesoscale variation in the photophysiology of the reef building coral Pocillopora damicornis along an environmental gradient
dc.type journal article en
dc.identifier.doi 10.1016/j.ecss.2009.03.015
dc.identifier.wos WOS:000266904700007


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