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Frontiers in Biology

ISSN 1674-7984

ISSN 1674-7992(Online)

CN 11-5892/Q

Front Biol Chin    2009, Vol. 4 Issue (3) : 271-281    https://doi.org/10.1007/s11515-009-0032-7
REVIEW
Ecological explanations for successful invasion of exotic plants
Qiang WANG(), Shikun JIN, Xiao RUAN
Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
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Abstract

The intentional introduction of exotic species can increase the level of local biodiversity, enrich people’s material lives, and bring significant social and economic benefits that are also the symbols of human progress. However, along with the frequent intercourse among countries and regions, the frequency of uncontrolled cross-regional migration of species is increased and there is a lack of scientific management strategy for the intentional introduction of exotic species. Exotic species invasion, which is behind habitat fragmentation, has become the second largest threatening factor to the maintenance of the global-scale level of biological diversity. Exotic species invasion can destroy the structure of an ecosystem, disturb the economic life of a society, and do harm to human health. In this paper, the authors review some of the ecological explanations for issues such as “what causes or mechanisms have led to the successful invasion of exotic species”, including the “ideal weeds characteristics”, “biodiversity resistance hypothesis”, “enemies release hypothesis”, “evolution of increased competitive ability hypothesis”, “niche opportunity hypothesis”, and “novel weapon hypothesis”. The authors also analyze and evaluate the background and theoretical basis of the hypotheses, providing explanations for some phenomena, as well as the deficiencies of these explanations.

Keywords exotic plant      biological diversity      novel weapon hypothesis     
Corresponding Author(s): WANG Qiang,Email:wangqiangsky@263.net   
Issue Date: 05 September 2009
 Cite this article:   
Qiang WANG,Shikun JIN,Xiao RUAN. Ecological explanations for successful invasion of exotic plants[J]. Front Biol Chin, 2009, 4(3): 271-281.
 URL:  
https://academic.hep.com.cn/fib/EN/10.1007/s11515-009-0032-7
https://academic.hep.com.cn/fib/EN/Y2009/V4/I3/271
Fig.1  Distribution group of all types of exotic invasive species in China (Li and Xie, 2002). a: microorganism; b: aquatic plant; c: terrestrial plant; d: aquatic invertebrate; e: terrestrial invertebrate; f: amphibian and reptile; g: fish; h: mammal.
hypothesis namedefinitionreferences
ideal weeds characteristicscharacters between weeds and non-weedsBaker (1965)
biodiversity resistance hypothesis(BRH)More diverse communities should be less susceptible to invasion by exotic species.Elton (1958)
enemies release hypothesis(ERH)Exotics are released from natural enemies that control their population growth.Darwin (1859); Williams (1954)
evolution of increased competitive ability hypothesis(EICA)Exotics experience rapid genetic changes linked to new selection pressure in the novel environment.Hermes (1992); Blossey and Notzold (1995)
novel weapon hypothesis(NWH)Exotics bring novel ways of biochemical interaction to recipient communities.Rabotnov (1982); Willis (1994)
niche opportunity hypothesis(NOH)Exotics are promoted among of resources, natural enemies, and the physical environment.Shea & Cheeson (2002)
Tab.1  Major hypotheses for the success of exotic plants
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