Biological responses to landscape change in the McMurdo Dry ValleysEntry ID: Biological_responses_to_landscape_change_in_the_McMurdo_Dry_Valleys
Abstract: The McMurdo Dry Valleys, Antarctica, are experiencing rapid landscape scale change including increased glacial melt, the expansion of water tracks, thermokarst formation, an increase in the extent of the soil active layer, lake level rise, and altered stream flow. The impacts of these changes for biological communities is currently unknown. The goal of this study was to conduct surveys and ... experiments in three Dry Valley soil habitats that are expected to undergo change: water tracks, lake margins, and active layer profiles. This data set contains samples from; 1) transects spanning dry-wet-dry soils in two water tracks in different lake basins, including three transects from each of three reaches for each water track, 2) experiments in which water and varying levels of salt were added to dry soils immediately adjacent to water tracks, 3) transects in lake margin soils in two different lake basins, including four transects perpendicular to each lake that span wet-to-dry soils, 4) experiments in which sterilized and non-sterilized lake water were added to dry soils adjacent to lakes, 5) the soil active layer from a total of eight soil pits in two different lake basins that were sampled at 5cm increments of depth, from the surface to 30cm or the permafrost, whichever was encountered first, and 6) experiments in which soils from the bottom of the soil active layer were moved to the upper layer and vice versa. Bacterial communities were sequenced for each sample and edaphic characteristics were measured for a subset of samples.
Purpose: The purpose do this data set is to document the biological communities that inhabit areas of the McMurdo Dry Valleys that are undergoing landscape scale change and to assess the response of these communities to changing conditions.
Data Set Citation
Dataset Originator/Creator: David Van Horn
Dataset Title: Biological responses to landscape change in the McMurdo Dry Valleys
Dataset Release Place: McMurdo Dry Valleys LTER/NCBI
Version: Not provided
Start Date: 2015-12-11Stop Date: 2016-01-24
Data Set Progress
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2019-02-28
Last DIF Revision Date: 2019-02-28