Thailand is recognized as having high species richness both flora and fauna. The systematic plant taxonomy and collection was initiated in 1957–1958. However, the distribution of specimen collections is uneven and mainly located near road networks. The Royal Forest Department (RFD) has since 2001 initiated the systematic uniformly fixed grids of 20 km × 20 km for measuring trees and their environments with the financial and technical support from the International Tropical Timber Organization. After the reorganization of the RFD in 2002, the Department of National Parks, Wildlife and Plant Conservation of Thailand, which then was separated from the RFD, has carried on this project and added the uniformly fixed grids ranging from 2.5 km × 2.5 km to 10 km × 10 km over the entire protected areas in Thailand. Throughout three project phases (2001–present), there are over 3,150 plots collected from 59 provinces, while the remaining 18 provinces do not have monitoring plots because of either the security issue or no forest covers. There were, based on altogether 24,605 occurrence records of trees with a diameter greater than 4.5 cm at breath high level from 363 species from 81 families and 222 genera. Trees belong to Dipterocarpaceae, Lamiaceae, Burseraceae, Phyllanthaceae, Malvaceae and Fabaceae families are dominant. Besides for simple estimation of tree density and volume, the data were used for bio‐geographical and climate change impact studies.

中文翻译：

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系统的森林清单图及其对泰国植物分布和气候变化影响研究的贡献

泰国被公认为动植物种类丰富。1957年至1958年开始进行系统的植物分类学和收集。但是，标本采集的分布不均匀，并且主要位于道路网络附近。皇家森林局（RFD）自2001年起启动了20 km的系统统一固定网格×在国际热带木材组织的资金和技术支持下，可测量20公里的树木及其环境。在RFD于2002年进行重组后，泰国国家公园，野生动植物保护局从RFD中分离出来，进行了此项目，并在2.5 km×2.5 km至10的范围内增加了固定固定的网格公里×泰国整个保护区的10公里。在三个项目阶段（2001年至今）中，从59个省中收集了3150多个土地，而其余18个省由于安全问题或没有森林覆盖而没有监测地。根据总共24,605例记录，来自81个家庭和222属的363个树种的直径大于4.5厘米的树木在呼吸时处于高水平。乔木科主要有乔木科，唇形科，牛科，木兰科，锦葵科和豆科。除了简单估计树木的密度和体积外，这些数据还用于生物地理学和气候变化影响研究。