Iron plays a role in nitrate drawdown by phytoplankton in Lake Erie surface waters as observed in lake-wide assessments

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Show simple item record Havens, SM Hassler, CS North, RL Guildford, SJ Silsbe, G Wilhelm, S Twiss, MR 2014-04-03T01:23:01Z 2012-01
dc.identifier.citation Canadian Journal Of Fisheries And Aquatic Sciences, 2012, 69 (2), pp. 369 - 381
dc.identifier.issn 0706-652X
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Phytoplankton interactions with iron (Fe) were examined in surface waters of Lake Erie during summer thermal stratification. Lake-wide sampling in June and September 2005 was conducted using a continuous surface water sampler (1 m sampling depth) and in July at 18 hydrographic stations (5 m sampling depth). In situ measurements of photosynthetic efficiency (maximum quantum yield of photosystem II) and phytoplankton community composition were measured using fast repetition rate fluorometry and a phytoplankton pigment-specific fluorometer, respectively, during June and September. High ratios (73%85%) of intracellular Fe to particulate Fe coincident with increases in chlorophyll a (Chl a) concentrations in the western and central basins in June and July imply that the majority of Fe in these regions was associated with intracellular pools. Correlations between intracellular Fe and Chl a were frequently observed when Heterokontophyta and Pyrrophyta dominated the phytoplankton community. Assimilation of Fe by the phytoplankton strongly influenced its partitioning between the dissolved and particulate phase. Dissolved iron (<0.45 µm) concentrations were proportional to Chl a concentrations and both dissolved iron and Chl a were inversely proportional to nitrate concentrations in July and September, suggesting that dissolved iron influenced both nitrate drawdown and Chl a concentrations in Lake Erie surface waters in summer
dc.publisher Canadian Science Publishing
dc.relation.isbasedon 10.1139/F2011-157
dc.title Iron plays a role in nitrate drawdown by phytoplankton in Lake Erie surface waters as observed in lake-wide assessments
dc.type Journal Article
dc.parent Canadian Journal Of Fisheries And Aquatic Sciences
dc.journal.volume 2
dc.journal.volume 69
dc.journal.number 2 en_US
dc.publocation Canada en_US
dc.identifier.startpage 369 en_US
dc.identifier.endpage 381 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0704 Fisheries Sciences
dc.personcode 107808
dc.percentage 100 en_US Fisheries Sciences en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords NA en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
utslib.collection.history Closed (ID: 3)

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