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dc.contributor.authorPayne, Richard J.eng
dc.contributor.authorKishaba, Keikoeng
dc.contributor.authorBlackford, Jeff J.eng
dc.contributor.authorMitchell, Edward A. D.eng
dc.date.accessioned2007-12-12T09:11:34Z
dc.date.available2007-12-12T09:11:34Z
dc.date.issued2006eng
dc.PublishedThe Holocene 2006 16 (3): 403-414en
dc.identifier.issn0959-6836en_US
dc.identifier.issnhttp://dx.doi.org/10.1191/0959683606hl936rpen_US
dc.identifier.urihttps://hdl.handle.net/1956/2492
dc.description.abstractTestate amoebae are valuable indicators of peatland hydrology and have been used in many palaeoclimatic studies in peatlands. Because the species' ecological optima may vary around the globe, the development of transfer function models is an essential prerequisite for regional palaeoclimatic studies using testate amoebae. We investigated testate amoebae ecology in nine peatlands covering a 250-km north-south transect in south-central Alaska. Redundancy analysis and Mantel tests were used to establish the relationship between the measured environmental variables (water-table depth and pH) and testate amoebae communities. Transfer-function models were developed using weighted averaging, weighted average partial least squares and maximum likelihood techniques. Model prediction error was initially 15.8 cm for water-table depth and 0.3 for pH but this was reduced to 9.7 cm and 0.2 by selective data exclusion. The relatively poor model performance compared with previous studies may be explained by the limitations of one-off water-table measurements, the very large environmental gradients covered and by recent climatic change in the study area. The environmental preferences of testate amoebae species agree well with previous studies in other regions. This study supports the use of testate amoebae in palaeoclimate studies and provides the first testate amoebae transfer function from Alaska.en_US
dc.language.isoengeng
dc.publisherSAGEen_US
dc.subjectProtozoaeng
dc.subjectSphagnumeng
dc.subjectRDAeng
dc.subjectDCAeng
dc.subjectMantel testseng
dc.subjectCommunity ecologyeng
dc.subjectTransfer functionseng
dc.subjectTestate amoebaeng
dc.subjectPeatland hydrologyeng
dc.subjectPalaeoclimateeng
dc.subjectAlaskaeng
dc.titleEcology of testate amoebae (Protista) in south-central Alaska peatlands: building transfer-function models for palaeoenvironmental studiesen_US
dc.typePeer reviewed
dc.typeJournal article
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480nob


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