In 1991 a nitrogen x phosphorus fertilisation experiment on dwarf shrub tundra close to Ny-Alesund, Svalbard was established. Treatments (0, 10, 50 kg N ha-1 yr-1; 0, 5 kg P ha-1 yr-1) were applied to Cassiope heath for 3 years and Dryas heath for 8 years. In 2011 the experiment was revisited to investigate the persistence of effects of fertilisation on species composition, vegetation nutrient status and ecosystem carbon stocks. The whole experiment has been led by Dr Sarah Woodin and colleagues, University of Aberdeen. The 2011 study, for which data are provided, was undertaken by Dr Lorna Street.
Funded was provided by the NERC grant NE/I016899/1
Arctic, bryophytes, carbon, nitrogen, phosphorus, soil, vegetation
|ISO Topic Categories:||
|Name||Dr Lorna Street|
|Organisation||University of Edinburgh|
|Name||Dr Sarah Woodin|
|Role(s)||Investigator, Technical Contact|
|Organisation||University of Aberdeen|
|Organisation||British Antarctic Survey|
|Reference:||Street, LE, Burns NR, & Woodin SJ (2015) Slow recovery of High Arctic plant communities from nitrogen enrichment. New Phytologist, 206: 682-695. doi: 10.1111/nph.13265
Baddeley, J., Woodin, S., & Alexander, I. (1994). Effects of Increased Nitrogen and Phosphorus Availability on the Photosynthesis and Nutrient Relations of Three Arctic Dwarf Shrubs from Svalbard. Functional Ecology, 8(6), 676-685. doi:10.2307/2390226
Gordon, C., Wynn, J. M. & Woodin, S. J. (2001), Impacts of increased nitrogen supply on high Arctic heath: the importance of bryophytes and phosphorus availability. New Phytologist, 149: 461-471. doi:10.1046/j.1469-8137.2001.00053.x
|Quality:||Standard analytical laboratory quality control procedures followed (eg inclusion of appropriate blanks and standards at intervals throughout sample analysis runs).
No significant data losses or cleaning of data required.
Species composition, foliar nutrient concentrations and NDVI were measured for all treatments on both heath types. Other parameters were measured in control, phosphorus, high nitrogen and high nitrogen plus phosphorus plots only.
|Lineage:||Gathering and processing of species composition and foliar nutrient concentration data is described in doi/10.1111/nph.13265/full
Gathering and processing of data for nutrient and carbon stocks in vegetation and soil were as follows:
Two plant/soil turves (10 x 5 cm, to below the organic horizon) were collected from each plot; the location of each turf was randomly selected to capture small scale within-plot variability. The depth of the moss (green and brown intact moss tissue) and soil organic layers were measured on each side of each turf in the field. The interface between intact mosses (green and brown parts) and the soil organic horizon was well-defined. Turfs were stored at 4 °C and within one week were sorted into aboveground vascular plant biomass, green moss, litter (comprising the lower, brown part of the moss and a small amount of vascular plant litter), organic soil and mineral soil. Each fraction was immediately dried (70 °C, 48 h) and weighed. One 4.2 cm diameter soil core was also taken from each plot (after removing the moss layer) and the soil organic horizon and top 0-3 cm of the mineral horizon were separated and used to calculate bulk density. Mass and volume of stones, where they occurred (in c. 20 % of samples) were accounted for in bulk density measurements. Soil and litter samples, which were too large to mill in their entirety, were coarsely ground using a laboratory blender to ensure thorough mixing before being subsampled for fine milling. All material was steel ball milled (F.Kurt Retsch GMbH & Co. KG, MM200, Germany) prior to CN analysis (Carlo-Erba NA 1500 Series 2, USA) and total P determination by hydrogen peroxide/sulphuric acid digestion and Flow Injection Analysis (Technicon autoanalyser, Sterilin Instruments, Herts, UK). Total carbon stocks are reported for the vegetation and soil organic layers only. The depth of the mineral soil layer above frost-shattered parent material was extremely variable (range 2.8 - 10.0 cm), making treatment effects on total carbon stocks in mineral soils difficult to detect with the available replication (n = 5). We therefore only sampled the top 3 cm of the mineral horizon to quantify potential changes in soil carbon content and bulk density in the surface mineral layers.
|Data Set Creator||Woodin, Sarah; Street, Lorna|
|Data Set Title||Soil and vegetation parameters from re-visitation of fertilisation experiment at Ny-Alesund, Svalbard|
|Data Set Release Place||Polar Data Centre; British Antarctic Survey, NERC|
|Data Set Publisher||Polar Data Centre; British Antarctic Survey, NERC|
Basic low-tech field equipment
Steel ball mill (F.Kurt Retsch GMbH & Co. KG, MM200, Germany
CN analyser (Carlo-Erba NA 1500 Series 2, USA)
Flow Injection Analyser (Technicon autoanalyser, Sterilin Instruments, Herts, UK)
|Data Storage:||The dataset is approx 70Kb and the format is Excel.|
|Access Constraints:||Requests for data can be made via the UK Polar Data Centre (UK PDC) at BAS.|
|Use Constraints:||This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/|