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The flickering connectivity system of the north Andean páramos

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dc.contributor.author Flantua, Suzette G. A. en
dc.contributor.author O'Dea, Aaron en
dc.contributor.author Onstein, Renske E. en
dc.contributor.author Giraldo, Catalina en
dc.contributor.author Hooghiemstra, Henry en
dc.date.accessioned 2019-06-27T02:01:40Z
dc.date.available 2019-06-27T02:01:40Z
dc.date.issued 2019
dc.identifier.citation Flantua, Suzette G. A., O'Dea, Aaron, Onstein, Renske E., Giraldo, Catalina, and Hooghiemstra, Henry. 2019. "<a href="https://repository.si.edu/handle/10088/98043">The flickering connectivity system of the north Andean páramos</a>." <em>Journal of Biogeography</em> 28 (6):1-18. <a href="https://doi.org/10.1111/jbi.13607">https://doi.org/10.1111/jbi.13607</a> en
dc.identifier.issn 1365-2699
dc.identifier.uri https://hdl.handle.net/10088/98043
dc.description.abstract Aim To quantify the effect of Pleistocene climate fluctuations on habitat connectivity across páramos in the Northern Andes. Location Northern Andes. Methods The unique páramos habitat underwent dynamic shifts in elevation in response to changing climate conditions during the Pleistocene. The lower boundary of the páramos is defined by the upper forest line, which is known to be highly responsive to temperature. Here, we reconstruct the extent and connectivity of páramos over the last 1 million years (Myr) by reconstructing the upper forest line from the long fossil pollen record of Funza09, Colombia, and applying it to spatial mapping on modern topographies across the Northern Andes for 752 time slices. Data provide an estimate of how often and for how long different elevations were occupied by páramos and estimate their connectivity to provide insights into the role of topography in biogeographical patterns of páramos. Results Our findings show that connectivity amongst páramos of the Northern Andes was highly dynamic, both within and across mountain ranges. Connectivity amongst páramos peaked during extreme glacial periods but intermediate cool stadials and mild interstadials dominated the climate system. These variable degrees of connectivity through time result in what we term the 'flickering connectivity system'. We provide a visualization (video) to showcase this phenomenon. Patterns of connectivity in the Northern Andes contradict patterns observed in other mountain ranges of differing topographies. Main conclusions Pleistocene climate change was the driver of significant elevational and spatial shifts in páramos causing dynamic changes in habitat connectivity across and within all mountain ranges. Some generalities emerge, including the fact that connectivity was greatest during the most ephemeral of times. However, the timing, duration and degree of connectivity varied substantially among mountain ranges depending on their topographical configuration. The flickering connectivity system of the páramos uncovers the dynamic settings in which evolutionary radiations shaped the most diverse alpine biome on Earth. en
dc.relation.ispartof Journal of Biogeography en
dc.title The flickering connectivity system of the north Andean páramos en
dc.type Journal Article en
dc.identifier.srbnumber 151533
dc.identifier.doi 10.1111/jbi.13607
rft.jtitle Journal of Biogeography
rft.volume 28
rft.issue 6
rft.spage 1
rft.epage 18
dc.description.SIUnit STRI en
dc.citation.spage 1
dc.citation.epage 18

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