| 摘要: |
| 结合广东省森林资源清查第七次复查样地调查资料，以广东省不同气候带草本植物群落为研究对象，探讨了其区系组成及草本物种多样性在不同气候带内的变化规律。结果表明：广东省中亚热带草本植物有67科147属190种；南亚热带有65科143属179种；北热带有15科41属42种。其中禾本科在草本层中占重要地位；从数量特征来看，芒萁（Dicranopteris dichotoma）在中亚热带和南亚热带占有显著的优势，在北热带则为飞机草（Eupatorium odoratum）和小蓬草（Conyza canadensis）；人工林草本层物种丰富度指数在1.313～1.459之间，多样性指数在1.260～1.328之间，均随纬度降低呈倒“V”形变化，而天然林、竹林和灌丛林草本层物种丰富度指数和多样性指数均随纬度降低而逐渐增加；总体而言，广东省森林草本植物多样性水平偏低。 |
| 关键词: 森林群落 草本植物 生物多样性 广东省 |
| DOI： |
| 分类号:S718 |
| 基金项目:广东省林业科技创新专项资金项目（2012KFCX019 01）；国家林业局林业碳汇计量监测体系建设广东试点项目 |
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| Species Diversity of Herbaceous Plants in Forest Communities in Guangdong |
|
YANG Haiyan
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| Abstract: |
| Pattern of biodiversity along latitude gradients is one of the basic issues in the biodiversity studies. The latitude gradients include several factors′ such as water and thermal conditions, anthropogenic impacts and so on. Especially the latitude gradient incorporates multiple resource gradients which vary continuously differently. Species diversity which varies with latitude gradients of herbaceous plants in Guangdong province was investigated and analyzed in this paper. The results showed that: a total of 190 herb species belonging to 67 families and 147 genera were recorded in mid subtropical areas, 179 herb species belonging to 65 families and 143 genera, 42 herb species belonging to 15 families and 41 genera in south subtropical and north tropical areas, respectively. Gramineae occupies an important role in this area. Dicranopteris dichotoma occupies the dominant position in mid subtropical and south subtropical areas, but it was Eupatorium odoratum and Conyza canadensis in north tropical areas from the respect of quantitative characteristics. Richness index in artificial forest was from 1.313 to 1.459 and diversity index was from 1.260 to 1.328, they all showed inverted “V” trend with the decreasing latitude, but increased with latitude decreasing in natural forest, bamboo forest and bush fallow. In general, the results showed a low levels of herbaceous′ diversity in Guangdong province. |
| Key words: forest community herbaceous plant biodiversity Guangdong province |
