Pinus patula growth areas allocated to mesozones

*The dataset shows climatically optimum growth areas and yield estimates of Pinus patula allocated to mesozones. Yield estimates were derived from Schulze R.E. and Maharaj M. (2007) and then allocated to mesozones by combining with a base mesozone layer obtained from the CSIR Geospatial Analysis Platform (GAP). *Climatically optimum growth areas of P. patula occur in an arc inland of the coast from the northeast areas of the Eastern Cape, through KwaZulu-Natal and including a strip along this province's border with Lesotho and the Free State, the western third of Swaziland and into Mpumalanga. The major constraint on the inland side of this arc is a lack of rainfall, while on the coastal side of the arc temperatures are too high. *Mean Annual Increments of P. patula, at> 20 t/ha/annum, are highest in an arc coastwards of the climatically optimum areas, where the trees tend to be vulnerable to heat related diseases. Away from the coast MAIs drop off into the 16 - 20 t/ha/annum range.本数据集展示了分配至中尺度分区（mesozones）的展叶松（Pinus patula）气候适宜生长区与产量估算值。产量估算值源自Schulze R.E.与Maharaj M.（2007）的研究成果，结合取自CSIR地理空间分析平台（GAP）的基础中尺度分区图层后，将估算值匹配至各中尺度分区。 展叶松的气候适宜生长区呈弧形分布于海岸内陆带，范围覆盖东开普省东北部、夸祖鲁-纳塔尔省，以及该省与莱索托、自由州省交界的狭长地带、斯威士兰西部三分之一区域，直至普马兰加省。该弧形带的内陆一侧主要受降水不足制约，而沿海一侧则因气温过高不适宜展叶松生长。 展叶松的年平均增量（Mean Annual Increments, MAI）超过20吨/公顷/年的高值区，位于气候适宜生长区向海一侧的弧形地带，该区域内林木易受高温相关病害侵袭。远离海岸的区域，MAI则降至16-20吨/公顷/年的区间。