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Fluctuating resources in plant communities: a general theory of invasibility
Author(s) -
Davis Mark A.,
Grime J. Philip,
Thompson Ken
Publication year - 2000
Publication title -
journal of ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.452
H-Index - 181
eISSN - 1365-2745
pISSN - 0022-0477
DOI - 10.1046/j.1365-2745.2000.00473.x
Subject(s) - propagule , ecology , resource (disambiguation) , variety (cybernetics) , habitat , introduced species , biology , resource acquisition is initialization , vegetation (pathology) , invasive species , environmental resource management , environmental science , resource allocation , economics , computer science , market economy , medicine , computer network , pathology , artificial intelligence
Summary 1 The invasion of habitats by non‐native plant and animal species is a global phenomenon with potentially grave consequences for ecological, economic, and social systems. Unfortunately, to date, the study of invasions has been primarily anecdotal and resistant to generalization. 2 Here, we use insights from experiments and from long‐term monitoring studies of vegetation to propose a new theory in which fluctuation in resource availability is identified as the key factor controlling invasibility, the susceptibility of an environment to invasion by non‐resident species. The theory is mechanistic and quantitative in nature leading to a variety of testable predictions. 3 We conclude that the elusive nature of the invasion process arises from the fact that it depends upon conditions of resource enrichment or release that have a variety of causes but which occur only intermittently and, to result in invasion, must coincide with availability of invading propagules.