Summary
Variables monitored in UK Sitka spruce long-term forest monitoring plots
| Variables | Period | Frequency of sampling | Llyn Brianne | Loch Awe | Coalburn | Tummel |
|---|---|---|---|---|---|---|
| Foliar sampling and analysis | 1995-2005 | 2 years |  |
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| 2006 | Once |  |
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| 2010 | Once |  |
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| Soil analysis | 1995 | Once |  |
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2008- 2015 (prior to clearfell) |
Once |  |
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| Soil solution | 1995-2001 | 2 weeks |  |
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| 2001-2006 | 2 weeks |  |
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| 2007-2008 | 4 weeks |  |
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2009-2014 2017- present |
4 weeks |  |
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| Atmospheric deposition | 1995-1996 | 2 weeks |  |
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| 1997-2006 | 4 weeks |  |
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| 2007-2008 | 4 weeks |  |
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| 2009-present | 4 weeks |  |
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| Increment | 1995-2004 | 5 years |  |
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| 2010- 2015 (prior to clearfell) | Once |  |
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| Crown condition | 1994-2007 | Annual |  |
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| 2009-2010 | Annual |  |
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| Leaf area index | 2009-2010 | Once |  |
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| Meteorology | 1994-2004 | Continuous (automatic) |  |
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| 2009-present | Continuous (automatic) |  |
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| SO2,O3,NOx above canopy | 2002 | Monthly |  |
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| SO2,O3,NOx,NH4 below canopy | 2002-2005 | Monthly |  |
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| NH4 | 2000-2006 | Monthly |  |
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| 2007-2008 | Monthly |  |
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| 2009-2010 | Monthly |  |
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| Ground vegetation | 1998-2004 | 3 years |  |
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| 2004 | Once |  |
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| 2010 | Once |  |
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| Quantitative ground vegetation | 2010 | Once |  |
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| Litter fall quantification | 2001-2007 | 4 weeks |  |
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| 2009-2014 | 4 weeks |  |
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| Litter fall analysis | 2010 | Once |  |
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| Growth uptake of heavy metals | 2003 | Single measurement |  |
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