| 摘要: |
| 为探究粤北石漠化地区不同石漠化程度森林优势树种及其生态位特征, 文章以粤北潜在、 轻
度、 中度、 重度石漠化代表性森林群落样地为研究对象, 从物种重要值、 生态位宽度、 生态位重叠和相
似指数 4 个方面分析其优势树种生态位特征。 结果表明, 不同石漠化程度森林群落的优势树种不同, 综合
物种重要值和生态位宽度可知, 马尾松 Pinus massoniana、 麻栎 Quercus acutissima 和秀丽锥 Castanopsis
jucunda 在各石漠化程度中有良好表现, 可作为石漠化地区树种选择的参考; 生态位重叠指数和相似性指
数平均值的排序由大到小依次为中度石漠化 (0. 795 和 0. 707)、 潜在石漠化 (0. 594 和 0. 535)、 重度石
漠化 (0. 566 和 0. 472)、 轻度石漠化 (0. 344 和 0. 349), 中度石漠化区域的物种竞争最激烈, 潜在石漠
化和重度石漠化区域次之, 轻度石漠化区域最低, 其中鸡仔木 Sinoadina racemosa-秀丽锥、 檵木 Loropetalum chinense-马尾松和鸡仔木-麻栎的物种对间存在较高的种间竞争, 在进行植被恢复时需避免这些种
对搭配。 |
| 关键词: 石漠化 生态位特征 优势树种 生态位重叠 生态位相似 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目 (2018CXPT004), 广东省生态公益林效益补偿资金省统筹经费 |
|
| Dominant Tree Species and Ecological Niche Characteristics of Forest with Different Rocky Desertification Levels in Northern Guangdong |
|
Zhang Huaying1, Guo Hao2, Cao Yaochang3, Feng Hanhua1, Wang Xu4, Luo Yong1, Baila Quzhen1
|
|
1.Guangdong Forestry Survey and Planning Institute;2.Hainan University;3.Central South University of Forestry&Technology;4.Research Institute of Tropical Forestry, Chinese Academy Of Forestry
|
| Abstract: |
| To explore the ecological niche characteristics of dominant tree species in forests with different
degrees of rocky desertification in northern Guangdong, this paper focused on four representative forest community samples from potential, mild, moderate, and severe rocky desertification areas in northern Guangdong. It
analyzed the ecological niche characteristics of their dominant tree species from four aspects: species importance
value, niche width, niche overlap, and similarity index. The results showed that the dominant tree species in
different degrees of rocky desertification forests. Considering both species importance value and niche width,
Pinus massoniana, Quercus acutissima, and Castanopsis jucunda exhibit good performances across all degrees
of desertification, and can be used as a reference for tree species selection in desertification areas. The average
values of niche overlap index and similarity index are in descending order: moderate desertification area (0. 795
and 0. 707 ), potential desertification area ( 0. 594 and 0. 535 ), severe desertification area ( 0. 566 and
0. 472), light desertification area (0. 344 and 0. 349). Species competition is most intense in the moderate desertification area, followed by the potential desertification and severe desertification areas, and the lowest in the
light desertification area. Among them, there is relatively high interspecific competition among the species pairs
of Sinoadina racemosa and C. jucunda, Loropetalum chinense and P. massoniana, S. racemosa and
Q. acutissima. These species pairs should be avoided when restoring vegetation. |
| Key words: rocky desertification niche characteristics dominant tree species niche overlap niche similarity |
