Journal of Resources and Ecology ›› 2012, Vol. 3 ›› Issue (3): 278-283.DOI: 10.5814/j.issn.1674-764x.2012.03.011

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Distribution of Invasive Plant Species in Relation to Environmental and Anthropogenic Factors in Five Nature Reserves in Northern China

ZHANG Yuanyuan1, FENG Jinchao1, SANG Weiguo2, XUE Dayuan1   

  1. 1 College of Life and Environmental Science, Minzu University of China, Beijing 100081, China;
    2 Key Laboratory of Vegetation and Environment Change, Institute of Botany, CAS, Beijing 100093, China
  • Received:2012-05-08 Revised:2012-09-06 Online:2012-09-30 Published:2012-09-27
  • Supported by:

    the China Bureau of Foreign Experts, the Ministry of Education of China (111 Program, Grant 2008-B08044), “985 Programme” of Minzu University of China (Grant Number MUC98504-14, MUC98507-08).

Abstract: The relationships between invasive plant species and environmental and anthropogenic factors were analyzed in five nature reserves in northern China.The distribution of invasive plants was analyzed using a Canonical Correspondence Analysis.Stepwise backward multiple regression was then done to identify the most important environmental and anthropogenic factors determining the richness and distribution of alien plants in the reserves.Total invasive plant richness varied was 25 species, 12 species, 13 species, five species and five species across the nature reserves.Invasive species richness decreased in response to environmental factors such as maximum temperature and minimum precipitation and increased in line with human activities, the total area of farmland and volume of freight.Tropical plant species declined from 31% to zero while the species originally from North America gradually increased.In respect of family composition of invasive species, most species belonged to the composites, whose proportion increased from 15%-40% from north to south across the five nature reserves while species from other families varied greatly along this gradient.Life-forms of invasive plant species varied between the reserves, but annual and perennial herbs were generally dominant.Pathways of such species were highly related to human activities and utilizations.

Key words: invasive species, nature reserve, Canonical Correspondence Analysis (CCA), distribution pattern