Li Jiayu, Lin Jiayi, Pei Chenyu, Lai Kaitao, Jeffries Thomas C, Tang Guangda
College of Forestry and Landscape Architecture, South China Limestone Plants Research Center, South China Agricultural University, Guangzhou, China.
School of Science and Health, University of Western Sydney, Penrith, NSW, Australia.
PeerJ. 2018 Sep 24;6:e5648. doi: 10.7717/peerj.5648. eCollection 2018.
is harvested for wood and fiber production in many tropical and sub-tropical habitats globally. Plantation has been controversial because of its influence on the surrounding environment, however, the influence of massive planting on soil microbial communities is unclear. Here we applied high-throughput sequencing of the 16S rRNA gene to assess the microbial community composition and diversity of planting chronosequences, involving two, five and ten years of plantation, comparing to that of secondary-forest in South China. We found that significant changes in the composition of soil bacteria occurred when the forests were converted from secondary-forest to . The bacterial community structure was clearly distinct from control and five year samples after was grown for 2 and 10 years, highlighting the influence of this plantation on local soil microbial communities. These groupings indicated a cycle of impact (2 and 10 year plantations) and low impact (5-year plantations) in this chronosequence of plantation. Community patterns were underpinned by shifts in soil properties such as pH and phosphorus concentration. Concurrently, key soil taxonomic groups such as showed abundance shifts, increasing in impacted plantations and decreasing in low impacted samples. Shifts in taxonomy were reflected in a shift in metabolic potential, including pathways for nutrient cycles such as carbon fixation, which changed in abundance over time following plantation. Combined these results confirm that plantation can change the community structure and diversity of soil microorganisms with strong implications for land-management and maintaining the health of these ecosystems.
在全球许多热带和亚热带栖息地,它被砍伐用于木材和纤维生产。由于其对周围环境的影响,人工林一直存在争议,然而,大规模种植对土壤微生物群落的影响尚不清楚。在这里,我们应用16S rRNA基因的高通量测序来评估人工林时间序列的微生物群落组成和多样性,包括两年、五年和十年的人工林,并与中国南方的次生林进行比较。我们发现,当森林从次生林转变为人工林时,土壤细菌的组成发生了显著变化。在种植2年和10年后,细菌群落结构与对照和五年的样本明显不同,突出了这种人工林对当地土壤微生物群落的影响。这些分组表明在这个人工林时间序列中存在一个影响周期(2年和10年的人工林)和低影响(5年的人工林)。群落模式受到土壤性质如pH值和磷浓度变化的支撑。同时,关键的土壤分类群如 显示出丰度变化,在受影响的人工林中增加,在低影响的样本中减少。分类学上的变化反映在代谢潜力的变化上,包括营养循环途径如碳固定,其在人工林种植后随时间丰度发生变化。综合这些结果证实,人工林种植可以改变土壤微生物的群落结构和多样性,对土地管理和维护这些生态系统的健康有重大影响。