Wu Jianping, Fan Houbao, Liu Wenfei, Huang Guomin, Tang Jianfu, Zeng Ruijin, Huang Jing, Liu Zhanfeng
Institute of Ecology and Environmental Science, Nanchang Institute of Technology, Nanchang, 330099, China.
Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia.
Environ Manage. 2015 Nov;56(5):1244-51. doi: 10.1007/s00267-015-0578-x. Epub 2015 Aug 4.
Although Eucalyptus is widely planted in South China, whose effects on native biodiversity are unclear. The objective of this study was to quantify the richness and composition of understory plants in two contrasting Eucalyptus chronosequences in South China. One was in Zhangzhou City with plantation age of 2, 4, and 6 years after clear-cutting Chinese fir forests, while the other was in Heshan City with plantation age of 2, 3, and 24 years that reforested on barren lands. Results showed that the richness of understory plants and functional groups was not significantly altered in the Zhangzhou chronosequence, while increased in the 24-year-old plantations, with a significantly larger proportion of woody plants than the younger plantations for the Heshan chronosequence. Moreover, a higher richness of woody plants accompanied by a lower richness of herbaceous species was detected in the Zhangzhou chronosequence compared with the Heshan one. To balance the need for pulp production and plant diversity conservation, we suggest that intercropping approaches between exotic Eucalyptus plantations and native forests should be considered in the fast rotation Eucalyptus plantations. However, Eucalyptus plantations may be used as pioneer species to sustain ecosystem functioning for the degraded lands.
尽管桉树在中国南方广泛种植，但其对当地生物多样性的影响尚不清楚。本研究的目的是量化中国南方两个不同桉树时间序列中林下植物的丰富度和组成。一个位于漳州市，在砍伐杉木林后种植了2年、4年和6年的桉树；另一个位于鹤山市，在荒地上重新造林，种植了2年、3年和24年的桉树。结果表明，在漳州时间序列中，林下植物和功能群的丰富度没有显著变化，而在24年生的人工林中有所增加，在鹤山时间序列中，木本植物的比例比年轻人工林显著更大。此外，与鹤山时间序列相比，漳州时间序列中木本植物丰富度较高，而草本物种丰富度较低。为了平衡纸浆生产需求和植物多样性保护，我们建议在速生桉树人工林中考虑外来桉树人工林与原生森林之间的间作方法。然而，桉树人工林可作为先锋物种，以维持退化土地的生态系统功能。
