Model estimates of topsoil microbes [Countryside Survey]

Topsoil microbe data - Bacteria. Data is representative of 0 - 15 cm soil depth and includes bacterial community structure as assessed by ordination scores, Shannon diversity index and Simpson diversity index. Over 1000 samples from 233 1km x 1km squares across Great Britain were sampled in 2007 and analysed. See Emmett et al. 2010 for further details of sampling and Griffiths et al. 2011 for further details of methods. Estimates of mean values within selected habitats and parent material characteristics across GB were made using Countryside Survey (CS) data from 2007 using a mixed model approach. The estimated means of habitat/parent material combinations using 2007 data are modelled on dominant habitat and parent material characteristics derived from the Land Cover Map 2007 and Parent Material Model 2009, respectively. The parent material characteristic used was that which minimised AIC in each model (see dataset documentation). Please see Scott, 2008 for further details of similar statistical analysis. Areas, such as urban and littoral rock, are not sampled by CS and therefore have no associated data. Also, in some circumstances sample sizes for particular habitat/parent material combinations were insufficient to estimate mean values.

References:
Emmett, B.A., Frogbrook, Z.L., Chamberlain P.M., Griffiths R., Pickup R., Poskitt, J., Reynolds B., Rowe E., Rowland P., Spurgeon D., Wilson J., Wood, C.M. (2008). Countryside Survey Technical Report No.03/07: Soils Manual. Centre for Ecology & Hydrology. http://nora.nerc.ac.uk/id/eprint/5201/1/CS_UK_2007_TR3%5B1%5D.pdf

Griffiths, R.I.; Thomson, B.C.; James, P.; Bell, T.; Bailey, M.; Whiteley, A.S. (2011). The bacterial biogeography of British soils. Environmental Microbiology, 13 (6). 1642-1654. https://doi.org/10.1111/j.1462-2920.2011.02480.x

Scott, W.A. (2008). CS Technical Report No.4/07: Statistical Report. Centre for Ecology & Hydrology. http://nora.nerc.ac.uk/id/eprint/5202/1/CS_UK_2007_TR4%5B1%5D.pdf

表土微生物数据——细菌类

该数据代表0-15厘米土层深度的样本，包含通过排序得分、香农多样性指数及辛普森多样性指数评估的细菌群落结构信息。2007年，研究人员在英国境内233个1km×1km的样方中采集并分析了超过1000份样本。采样细节详见Emmett等（2008），方法细节详见Griffiths等（2011）。

研究人员采用混合模型方法，利用2007年乡村调查（CS）数据，估算了英国境内选定生境及母质特征的均值。基于2007年数据得到的生境/母质组合估算均值，分别以2007年土地覆盖图及2009年母质模型中的优势生境和母质特征为建模依据。所采用的母质特征为各模型中使赤池信息准则（AIC）最小化的特征（详见数据集文档）。类似统计分析的详细信息请参见Scott（2008）。

城市及滨海岩石等区域未被CS纳入采样范围，因此无相关数据。此外，部分特定生境/母质组合的样本量不足以支持均值估算。

参考文献：
Emmett, B.A., Frogbrook, Z.L., Chamberlain P.M., Griffiths R., Pickup R., Poskitt, J., Reynolds B., Rowe E., Rowland P., Spurgeon D., Wilson J., Wood, C.M.（2008）. 《乡村调查技术报告第03/07号：土壤手册》. 生态与水文中心. http://nora.nerc.ac.uk/id/eprint/5201/1/CS_UK_2007_TR3%5B1%5D.pdf
Griffiths, R.I.；Thomson, B.C.；James, P.；Bell, T.；Bailey, M.；Whiteley, A.S.（2011）. 《英国土壤的细菌生物地理学》. 《环境微生物学》，13（6）：1642-1654. https://doi.org/10.1111/j.1462-2920.2011.02480.x
Scott, W.A.（2008）. 《乡村调查技术报告第04/07号：统计报告》. 生态与水文中心. http://nora.nerc.ac.uk/id/eprint/5202/1/CS_UK_2007_TR4%5B1%5D.pdf