广西十万大山自然保护区外来入侵植物研究

十万大山属北热带山地,有着丰富的生物多样性,但目前已遭到外来种植物入侵。通过实地调查和查证文献资料,初步确定十万大山自然保护区内外来入侵植物有23种,隶属于12科21属,其中菊科种类最多,6种,占入侵植物总数的26.1%;其次为苋科,3种,占入侵植物的13.0%。从来源看,23种入侵植物中,有21种来自热带美洲,占入侵植物种的91.3%。23种入侵植物均为r-选择对策种,其中有草本20种,占入侵植物种类总数的87.0%。23种入侵植物几乎全部是由人类活动直接或间接引入。最后对保护区内入侵植物的危害性及防治措施也作了初步的分析。

Invasive plant species in Shiwandashan Mountain National Natural Reserve, Guangxi, China

Shiwandashan Mountain,located in North-tropical Mountainous area,is famous for its abundant biodiversity.But now,invasions of exotic plants brought menace to native plants.In this paper,the invasive plant species were investigated.Altogether,23 invasive species from 21 genera and 12 families were collected in Shiwandashan Mountain National Natural Reserve.Of all the exotic species,26.1%(6 species) belongs to Asteraceae family and 3 species(13.0%) to the Amaranthaceae family.21 species came from Tropical America, accounting for 91.3% of all the exotic species.All 23 invasive species were introduced by human beings either directly or indirectly and recognized as reco-strategy,among them,20 species(87.0%) were herbs.Finally,the current situation,potential damage,and prevention and control strategies of these invasive plants were also discussed in the paper.