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A niche for neutrality
Author(s) -
Adler Peter B.,
HilleRisLambers Janneke,
Levine Jonathan M.
Publication year - 2007
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/j.1461-0248.2006.00996.x
Subject(s) - niche , neutrality , neutral theory of molecular evolution , ecological niche , ecology , fitness landscape , genetic fitness , equivalence (formal languages) , biology , per capita , inclusive fitness , evolutionary biology , statistical physics , biological evolution , mathematics , physics , population , genetics , sociology , philosophy , demography , epistemology , discrete mathematics , habitat , gene
Ecologists now recognize that controversy over the relative importance of niches and neutrality cannot be resolved by analyzing species abundance patterns. Here, we use classical coexistence theory to reframe the debate in terms of stabilizing mechanisms (niches) and fitness equivalence (neutrality). The neutral model is a special case where stabilizing mechanisms are absent and species have equivalent fitness. Instead of asking whether niches or neutral processes structure communities, we advocate determining the degree to which observed diversity reflects strong stabilizing mechanisms overcoming large fitness differences or weak stabilization operating on species of similar fitness. To answer this question, we propose combining data on per capita growth rates with models to: (i) quantify the strength of stabilizing processes; (ii) quantify fitness inequality and compare it with stabilization; and (iii) manipulate frequency dependence in growth to test the consequences of stabilization and fitness equivalence for coexistence.