J Plant Ecol ›› 2023, Vol. 16 ›› Issue (6): rtad039.DOI: 10.1093/jpe/rtad039

• Research Article •    

Invasiveness and impact of invasive species on the Tibetan Plateau are inconsistent

Shuping Guan1,2,3, Pengdong Chen2,3,4, Xingle Qu5, Xiaolan Wang6, Shuopeng Wang5, Haiying Li5, Jiangping Fang5, Yi Wang7, Jiarui Chen5,*, Wei Huang2,*, Evan Siemann4   

  1. 1School of Ecology and Environment, Tibet University, Lhasa 850000, China;
    2CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China;
    3University of Chinese Academy of Sciences,Beijing 100049, China;
    4Department of Biosciences, Rice University, Houston, TX 77005, USA;
    5Key Laboratory of Alpine Vegetation Ecological Security, Institute of Tibet Plateau Ecology, Tibet Agriculture and Animal Husbandry University, Nyingchi 860000, China;
    6Resource and Environment College, Tibet Agriculture and Animal Husbandry University, Nyingchi 86000, China;
    7School of Ecology and Environmental Science, Yunnan University, Kunming 650504, China


Abstract: Managing invasions in the context of globalization is a challenge in part because of the difficulty of inferring invader impacts from their invasiveness (i.e. ability to invade ecosystems). Specifically, the relationship between invasiveness and impact may be context-dependent and it has not been explored in such a unique ecosystem as the Tibetan Plateau. Here, we investigated 32 invasive plant species on the Tibetan Plateau in terms of their distribution, abundance, per capita effects on natives and traits across a large geographic transect to test the relationship between invasiveness and impacts on native communities. We decomposed the components (range, R; local abundance, A; per capita effect, E) that drive the impacts, and investigated the relative contributions of plant traits to these components. The results showed that there was no correlation between invasiveness (R × A) and impacts (R × A × E) of invasive species on the Tibetan Plateau. Specifically, plant invasiveness per se did not indicate a serious threat of harmful impact. In this ecosystem, R and A together drove invasiveness, while R alone drove impacts. Fruit type significantly influenced E, and species bearing berry fruits had the most negative per capita effects. However, plant traits did not drive invasiveness or impact through R, A or E. Our results suggest that the mismatch between components driving invasiveness vs. impact prevent the prediction of impacts of invasive species from their invasiveness. Therefore, management actions directed against invasive plants should prioritize broadly distributed species or those with demonstrated high impacts on native species.

Key words: biological invasion, biogeography, ecological impact, invasiveness, managing invasions, per capita effect, Tibetan Plateau

在全球变化背景下,管控入侵物种是一项具有挑战性的工作。这主要由于从入侵物种的入侵性推断它们的生态危害存在很大的不确定性。更确切地说,入侵性和生态危害的关系可能依赖于所研究的生态系统,同时这种关系还没有在像青藏高原这样独特的高寒生态系统中被研究过。在这项研究中,我们在青藏高原东南部的一个样带上调查了32种入侵植物。我们将这些入侵物种的生态危害分解为分布范围(R)、局部丰度(A)和个体对本地植物群落的影响(E) 3个组分,并研究了植物性状对这些组分的相对贡献。研究结果表明,入侵植物的入侵性(R × A)和其所产生的危害(R × A × E)没有相关性。这表明这些入侵植物的入侵性不能反映它们对本地群落生态危害的严重性。在青藏高原,RA共同驱动了入侵性,而R单独驱动了生态危害。植物性状并没有通过这3个组分驱动入侵性和生态危害,只有果实类型(主要是浆果)影响了E。我们的结果表明,驱动入侵性和生态危害的组分的不匹配导致了入侵植物的入侵性不能反映它们的生态危害。因此,关于入侵物种的管控应该优先考虑那些分布广泛的物种或者已经被证实会对本地物种产生负面影响的物种。

关键词: 生物入侵, 生物地理学, 生态影响, 入侵性, 入侵管理, 人均效应, 青藏高原