摘要
拉鲁湿地国家级自然保护区保护着其独特的高寒湿地生态系统和丰富的生物多样性,但随着气候变化和人类活动的干扰,入侵植物已出现在拉鲁湿地,对湿地生物多样性和生态系统稳定性构成了潜在威胁。为了解其本底状况,本研究以样线法对拉鲁湿地入侵植物进行了调查,通过9条样线74个样点的实地调查研究,发现:拉鲁湿地共有入侵植物29种,隶属于10科25属,主要为菊科(11种)、豆科(5种)和禾本科(4种),出现频度最高的种类依次是:苦苣菜(Sonchus oleraceus)、灰绿藜(Chenopodium glaucum)、牛膝菊(Galinsoga parviflora);从入侵等级来看,具有明显入侵性的物种有13种,包括4种恶性入侵物种和9种严重入侵物种;拉鲁湿地外来入侵植物区系在属的水平上具有明显的温带性质,美洲起源的植物占据主要优势。拉鲁湿地主要有8种生境,已在其中6种生境中发现入侵植物,人工林生境发现的入侵植物种类高达26种。
The Lalu Wetlands National Nature Reserve in Lhasa protects its unique alpine wetland ecosystem and rich biodiversity,but with the disturbance of climate change and human activities,invasive plants have appeared in the Lalu Wetlands,posing a potential threat to wetland biodiversity and ecosystem stability.Through a survey of 74 sample points belonging to 9 transects,this study investigated the background status of invasive plants in Lalu Wetlands.The results showed that there were 29 invasive plants species in Lalu Wetlands.These species were belonging to 10 families and 25 genera,mainly from Asteraceae(11 species),Fabaceae(5 species)and Poaceae(4 species).The most frequent species were Sonchus oleraceus,Chenopodium glaucum and Galinsoga parviflora.From the perspective of invasion grade,there were 13 species with obvious invasiveness,including 4 malignant invasive species and 9 serious invasive species.The alien invasive flora of Lalu Wetlands has obvious temperate nature at the genus level,and the plants of American origin dominate the main advantage.There are 8 habitats in Lalu Wetland,and the invasive plants habitats have been found within 6 habitats,and 26 invasive plant species were found in plantation habitats.
作者
李森
阿拉姆
拉多
土艳丽
Li Sen;Alamu;Lhaduo;Tu Yanli(Mitika Wetland Field Observatory,College of Ecology and Environment,Tibet University,Lhasa 850000,China;Research Center for Car-bon Neutrality at the Third Pole of the Earth,Tibet University,Lhasa 850000,China;Tibet Plateau Institute of Biology,Lhasa 850001,Chi-na;Xizang Key Laboratory of Bioresources and Biosafety,Lhasa 850001,China)
出处
《西藏科技》
2023年第11期60-72,F0002,共14页
Xizang Science And Technology
基金
第二次青藏高原综合科学考察研究(2019QZKK0502030405)
西藏自治区重点研发项目(XZ202001ZY0003G)。
关键词
拉鲁湿地
入侵植物
区系特征
分布特征
Lalu Wetlands
Invasive plants
Floral
Distribution characteristics
