General Information
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| Title: | Microsite Environmental Data, Buxton Climate Change Experiment, UK, 2008 |
| Identifier: | fridley.11.1 |
| Abstract: |
The Buxton Climate Change Impacts study was established in 1992 on a steep daleside of calcareous grassland outside Buxton, Derbyshire, UK. In five replicate blocks of 3 x 3 m plots, the vegetation has been subjected to climate treatments of winter heating (3C above ambient, Nov-April), summer drought (no rain, July-Aug), summer augmented rainfaill (20% above the long-term average, June-Sept), and two interaction treatments (heating-drought, heating-watered) in addition to replicated controls. The grassland is maintained in a short turf to simulate sheep and cattle grazing each autumn (Oct). In addition to annual point quadrat touches conducted at the whole-plot (9 m2) scale, permanent microsite quadrats were established within each plot in 2008 at the 100 cm2 scale. Species cover and environmental parameters have been monitored in microsites annually (2009-2011 controls only). This data package contains microsite soil depth and pH data; another package contains species cover data.
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| Keywords: |
- climate change
- vegetation
- grassland
- competition
- climate manipulation
- calcareous
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Involved Parties
Data Set Creators
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Individual: | Professor Philip Grime |
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Organization: | University of Sheffield, UK |
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Individual: | Dr. Jason Fridley |
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Organization: | Syracuse University |
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| Department of Biology, |
| 107 College Place, |
| Syracuse, New York 13244 USA |
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Data Set Contacts
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Individual: | Dr. Jason Fridley |
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Organization: | Syracuse University |
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| Department of Biology, |
| 107 College Place, |
| Syracuse, New York 13244 USA |
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Associated Parties
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Individual: | Dr. Jason Fridley |
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Organization: | Syracuse University |
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| Department of Biology, |
| 107 College Place, |
| Syracuse, New York 13244 USA |
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Data Set Characteristics
| Geographic Region: |
| Geographic Description: | Harpur Hill, Buxton, Derbyshire, UK |
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Bounding Coordinates:
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| West: | -1.92 degrees
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| East: | -1.91808 degrees
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| North: | 53.25 degrees
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| South: | 53.25 degrees
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Sampling, Processing and Quality Control Methods
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Step by Step Procedures
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| Step 1: |
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Description:
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Climate manipulation
Three climate treatments have been applied to 3x3m plots:
1. Temperature has been elevated from November to April each year, beginning in November 1993. Each heated plot contains two 1000 W, 240-V AC heating cables secured to the soil surface in parallel runs spaced 50mmapart. Soil surface temperature of heated plots is maintained at 3°C above ambient by thermocouples in heated and control plots linked to a PC-based control system.
2. Rainfall has been intercepted above the vegetation throughout July and August since the summer of 1994 by means of automatically operating, semitransparent shelters that slide across the plots at the onset of rain and retreat to an off-plot position when rain ceases. Plots of intercepted summer rainfall have significantly reduced summer soil moisture levels compared with control plots, particularly within the interior 2 x 2 m subject to vegetation monitoring. In 2004, a decision was made to shift the drought treatment to alternate years (thus suspending simulated droughts in 2004 and 2006).
3. Since 1994, additional water has been added on a monthly basis to the plots during the months of June to September (inclusive), to maintain an input at least 20% above the long-term (1972–1982) Buxton average for each month.
In addition to treatments 1, 2, and 3, two combinations, (1&2) and (1&3),have been maintained. All five treatments, together with untreated controls, are included in a fully randomized block, replicated 5 times.
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| Step 2: |
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Description:
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Microsite environmental survey
In 2006, 120 10x10 cm microsite quadrats were established, including four in each 3x3m experimental unit of the overall climate change study. In 2008, an additional 120 quadrats were established, adding four to each plot, for a total of eight microsite quadrats per plot (240 overall). Within each 3x3m plot, microsite locations were stratified based on soil depth, where two samples were placed in each of four depth strata of 0–7, 8–12, 13–20, and 211 cm, with bins calculated from quantiles of an initial depth survey of ca. 1000 samples. For
the 120 quadrats established in 2006, soil depths were sampled at nine points within each microsite, including the center and corners of the 100cm2 quadrat and four additional samples at the corners of a concentric 2020cm square. In 2006, surface pH was also sampled at the nine locations per microsite used for depth measurements by taking small soil samples (top 3 cm) analyzed by a pH meter in the laboratory. Soil depths for the remaining 120 microsites were surveyed in the same manner in 2008, but not pH due to concerns over destruction to the vegetation.
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Data Set Usage Rights
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Obtain permission from data set owner
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