浙江省自然保护区落叶阔叶林群落物种组成与结构比较研究

群落组成是影响森林演替方向的主要因素之一.浙江省地处我国东部，属典型亚热带气候，全省植被类型多样，物种组成丰富.为了更好地了解浙江省自然保护区内落叶阔叶林群落结构，于2012年在浙江清凉峰自然保护区（QLF）、浙江天目山自然保护区（TMS）、浙江龙王山自然保护区（LWS）、浙江九龙山自然保护区（JLS）、浙江大盘山自然保护区（DPS）5个自然保护区内选取并建立了12个30 m×30 m不同落叶阔叶群落样地，对样地中胸径（DBH）≥1 cm的木本个体进行了坐标定位和每木调查.结果表明，12个样地内木本植物共计218种，隶属于46科，103属，总计8 935株.各样地物种数由大到小依次为，LWS12、TMS31、QLF21、QLF22、JLS31、LWS22、TMS21、LWS31、JLS32、QLF12、DPS11、LWS11；从物种多度和重要值等指标来看，除DPS11群落具有比较明显的优势种以外，其余各群落内物种重要值分配较均匀；所有群落的区系成分以温带成分较多，原生林群落温带成分比例较次生林群落高，属的分布也更为相似；12个群落中除QLF22和DPS11中所有物种的径级分布分别呈“L”型和偏正态外，其余各群落的径级分布均呈倒“J”型，具有良好的更新性；相同树种在不同群落内的径级分布各不相同，表明群落类型与种群动态有密切关系.

Species composition and community structure of deciduous broad leaved forests in National Nature Reserves of Zhejiang Province

Zhejiang Province is located in Eastern China, which is affected by subtropical monsoon climate. There are rich in vegetation types and plant diversity of Zhejiang Province. In order to better understand the species composition of the deciduous broad-leaved forests, we established twelve 30 m×30 m forest dynamic plots（FDPs） in 5 Nature Reserves of Zhejiang in 2012. These 5 reserves are Qingliangfeng National Nature Reserve（QLF）, Tianmushan National Nature Reserve（TMS）, Longwangshan National Nature Reserve（LWS）, Jiulongsban National Nature Reserve（JLS） and Dapanshan National Nature Reserve（DPS）. In these FDPs, we mapped, tagged and identified all the standing woody plants with diameter at breast height （DBH, 1.3 m above ground）DBH≥lcm. In consequence, we recorded 8 935 stems which belong to 218 species, 103 genera and 46 families. Species richnesses of the twelve FDPs listed in decreasing order are LWS12, TMS31, QLF21, QLF22, JLS31, LWS22, TMS21, LWS31, JLS32, QLF12, DPSll and LWSll. Besides DPSll is with obvious dominant species, the other FDPs are with relatively evenly species importance values. Floristic elements analyses showed that the temperate elements dominated over tropical elements in all communities. In addition, percentages of temperate elements in primary forest plots are higher than that in secondary forests. The size-class structure （DBH） of all species in the twelve communities, exceptfor QLF22 plot and DPStl plot, are generally in a reverse “J” shape distribution, indicating a stable structure. Size structure of given species varied among FDPs, suggesting that community type related to the population dynamics.