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dc.contributor.authorMottl, Ondrej
dc.contributor.authorGrytnes, John Arvid
dc.contributor.authorSeddon, Alistair William Robin
dc.contributor.authorSteinbauer, Manuel
dc.contributor.authorBhatta, Kuber Prasad
dc.contributor.authorFelde, Vivian Astrup
dc.contributor.authorFlantua, Suzette
dc.contributor.authorBirks, Harry John Betteley
dc.description.abstractDynamics in the rate of compositional change (rate-of-change; RoC), preserved in paleoecological sequences, are thought to reflect changes due to exogenous (climate and human forcing) or endogenous (local dynamics and biotic interactions) drivers. However, changes in sedimentation rates and sampling strategies can result in an uneven distribution of time intervals and are known to affect RoC estimates. Furthermore, there has been relatively little exploration of the implications of these challenges in quantifying RoC in paleoecology. Here, we introduce R-Ratepol – an easy-to-use R package – that provides a robust numerical technique for detecting and summarizing RoC patterns in complex multivariate time-ordered stratigraphical sequences. First, we compare the performance of common methods of estimating RoC and detecting periods of high RoC (peak-point) using simulated pollen-stratigraphical data with known patterns of compositional change and temporal resolution. In addition, we propose a new method of binning with a moving window, which shows a more than 5-fold increase in the correct detection of peak-points compared to the more traditional way of using individual levels. Next, we apply our new methodology to four representative European pollen sequences and show that our approach also performs well in detecting periods of significant compositional change during known onsets of human activity, early land-use transformation, and changes in fire frequency. Expanding the approach using R-Ratepol to open-access paleoecological datasets in global databases, such as Neotoma, will allow future paleoecological and macroecological studies to quantify major changes in biotic composition or in sets of abiotic variables across broad spatiotemporal scales.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleRate-of-change analysis in palaeoecology revisited: a new approachen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.source.journalReview of Palaeobotany and Palynologyen_US
dc.identifier.citationReview of Palaeobotany and Palynology. 2021, 293, 104483.en_US

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Navngivelse 4.0 Internasjonal
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