Show simple item record

dc.contributor.authorAbell, Jonathan M
dc.contributor.authorOezkundakci, Deniz
dc.contributor.authorHamilton, David P
dc.contributor.authorJones, John R
dc.date.accessioned2017-05-29T12:34:24Z
dc.date.available2017-05-29T12:34:24Z
dc.date.issued2012
dc.identifier.issn1863-9135
dc.identifier.doi10.1127/1863-9135/2012/0272
dc.identifier.urihttp://hdl.handle.net/10072/337300
dc.description.abstractWe present analysis of variations in relationships between nitrogen (N), phosphorus (P) and chlorophyll-a (chl-a) in lakes along a gradient of latitude inclusive of tropical, temperate and polar regions. Total nitrogen (TN), total phosphorus (TP), chl-a, latitude and depth data were collated for 1316 lakes situated between 70 °S and 83 °N. Latitudinal variation was then analysed for three empirical measures of phytoplankton nutrient limitation and/or nutrient assimilation. Lastly, chl-a near-maxima conditional on TN and TP abundance were empirically defined for this global dataset using quantile regression. Mean TN:TP increases with distance from the equator. This relationship is independent of variation in either lake depth or trophic state, reflecting latitudinal variation in nutrient cycling processes and/or nutrient sources. There is a negative linear relationship between latitude and chl-a:TN which similarly suggests that N is less abundant relative to phytoplankton growth requirements at lower latitudes. Relative to temperate lakes, the statistical capability of TN and TP to predict chl-a is poor for both tropical and polar lakes, reflecting latitudinal variation in lake ecosystem functioning and the subsequent potential unsuitability of applying relationships derived for temperate lakes elsewhere. Chl-a near-maxima correspond to chl-a:TN and chl-a:TP yields of 0.046:1 and 0.87:1 respectively, although some observations greatly exceed near-maxima, suggesting possible physiologically plastic phytoplankton responses in these exceptional cases. Deficiencies in understanding the mechanisms that drive variation in macro-nutrient stoichiometry and phytoplankton biomass-nutrient relationships across large spatial scales necessitates further landscape-scale research on this topic, particularly in the tropics.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherE. Schweizerbart'sche Verlagsbuchhandlung
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto14
dc.relation.ispartofissue1
dc.relation.ispartofjournalFundamental and Applied Limnology
dc.relation.ispartofvolume181
dc.subject.fieldofresearchPhysical Geography and Environmental Geoscience not elsewhere classified
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode040699
dc.subject.fieldofresearchcode04
dc.subject.fieldofresearchcode06
dc.subject.fieldofresearchcode09
dc.titleLatitudinal variation in nutrient stoichiometry and chlorophyll-nutrient relationships in lakes: A global study
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyrightSelf-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the author[s] for more information.
gro.hasfulltextNo Full Text
gro.griffith.authorHamilton, David P.


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record