scholarly journals A bird pollinator shows positive frequency dependence and constancy of species choice in natural plant communities

Ecology ◽  
2016 ◽  
Vol 97 (11) ◽  
pp. 3110-3118 ◽  
Author(s):  
B. Schmid ◽  
H. Nottebrock ◽  
K. J. Esler ◽  
J. Pagel ◽  
K. Böhning-Gaese ◽  
...  
Keyword(s):  
Frequency Dependence ◽  
Plant Communities ◽  
Natural Plant ◽  
Positive Frequency Dependence ◽  
Positive Frequency

The Economics of Egg Trading: Mating Rate, Sperm Competition and Positive Frequency-Dependence

2014 ◽  
Vol 4 (4) ◽  
pp. 379-390 ◽  
Author(s):  
Jonathan M. Henshaw ◽  
Michael D. Jennions ◽  
Hanna Kokko
Keyword(s):  
Frequency Dependence ◽  
Sperm Competition ◽  
Mating Rate ◽  
Positive Frequency Dependence ◽  
Positive Frequency

Can positive frequency dependence facilitate plant coexistence?

2013 ◽  
Vol 28 (6) ◽  
pp. 317-318 ◽  
Author(s):  
Philip B. Greenspoon ◽  
Leithen K. M’Gonigle
Keyword(s):  
Frequency Dependence ◽  
Positive Frequency Dependence ◽  
Plant Coexistence ◽  
Positive Frequency

Positive Frequency Dependence in Graffiti: An Empirical Case Study of Cultural Evolution

2013 ◽  
Vol 13 (3-4) ◽  
pp. 287-311
Author(s):  
Julia A. Maddison ◽  
Michael Doebeli
Keyword(s):  
Frequency Dependence ◽  
Cultural Evolution ◽  
Positive Frequency Dependence ◽  
Positive Frequency

scholarly journals Coexistence theory and the frequency-dependence of priority effects

2018 ◽  
Author(s):  
Po-Ju Ke ◽  
Andrew D. Letten
Keyword(s):  
Frequency Dependence ◽  
Priority Effects ◽  
Coexistence Theory ◽  
Positive Frequency Dependence ◽  
Positive Frequency

AbstractPriority effects encompass a broad suite of ecological phenomena. Several studies have suggested reframing priority effects around the stabilizing and equalizing concepts of coexistence theory. We show that the only compatible priority effects are those characterized by positive frequency dependence.

Positive frequency dependence undermines the success of restoration using historical disturbance regimes

2015 ◽  
Vol 18 (9) ◽  
pp. 883-891 ◽  
Author(s):  
Raelene Crandall ◽  
Tiffany M. Knight
Keyword(s):  
Frequency Dependence ◽  
Disturbance Regimes ◽  
Positive Frequency Dependence ◽  
Positive Frequency

scholarly journals Coexistence under positive frequency dependence

2001 ◽  
Vol 268 (1464) ◽  
pp. 273-277 ◽  
Author(s):  
Jane Molofsky ◽  
James D. Bever ◽  
Janis Antonovics
Keyword(s):  
Frequency Dependence ◽  
Positive Frequency Dependence ◽  
Positive Frequency

scholarly journals Mycorrhizal feedbacks generate positive frequency dependence accelerating grassland succession

2018 ◽  
Vol 107 (2) ◽  
pp. 622-632 ◽  
Author(s):  
Liz Koziol ◽  
James D. Bever
Keyword(s):  
Frequency Dependence ◽  
Positive Frequency Dependence ◽  
Positive Frequency

scholarly journals When rarity has costs: coexistence under positive frequency-dependence and environmental stochasticity

2017 ◽  
Author(s):  
Sebastian J. Schreiber ◽  
Masato Yamamichi ◽  
Sharon Y. Strauss
Keyword(s):  
Reproductive Success ◽  
Frequency Dependence ◽  
Resource Competition ◽  
Extinction Risk ◽  
Niche Overlap ◽  
Environmental Stochasticity ◽  
Environmental Fluctuations ◽  
Positive Frequency Dependence ◽  
Demographic Responses ◽  
Positive Frequency

AbstractStable coexistence relies on negative frequency-dependence, in which rarer species invading a patch benefit from a lack of conspecific competition experienced by residents. In nature, however, rarity can have costs, resulting in positive frequency-dependence (PFD) particularly when species are rare. Many processes can cause positive frequency-dependence, including a lack of mates, mutualist interactions, and reproductive interference from heterospecifics. When species become rare in the community, positive frequency-dependence creates vulnerability to extinction, if frequencies drop below certain thresholds. For example, environmental fluctuations can drive species to low frequencies where they are then vulnerable to PFD. Here, we analyze deterministic and stochastic mathematical models of two species interacting through both PFD and resource competition in a Chessonian framework. Reproductive success of individuals in these models is reduced by a product of two terms: the reduction in fecundity due to PFD, and the reduction in fecundity due to competition. Consistent with classical coexistence theory, the effect of competition on individual reproductive success exhibits negative frequency-dependence when individuals experience greater intraspecific competition than interspecific competition i.e., niche overlap is less than one. In the absence of environmental fluctuations, our analysis reveals that (1) a synergistic effect of PFD and niche overlap that hastens exclusion, (2) trade-offs between susceptibility to PFD and maximal fecundity can mediate coexistence, and (3) coexistence, when it occurs, requires that neither species is initially rare. Analysis of the stochastic model highlights that environmental fluctuations, unless perfectly correlated, coupled with PFD ultimately drive one species extinct. Over any given time frame, this extinction risk decreases with the correlation of the demographic responses of the two species to the environmental fluctuations, and increases with the temporal autocorrelation of these fluctuations. For species with overlapping generations, these trends in extinction risk persist despite the strength of the storage effect decreasing with correlated demographic responses and increasing with temporal autocorrelations. These results highlight how the presence of PFD may alter the outcomes predicted by modern coexistence mechanisms.

scholarly journals Widespread Negative Frequency-Dependent Selection Maintains Diversity in the Legume-Rhizobia Symbiosis: Balancing nodulation may explain the paradox of rhizobium diversity

2017 ◽  
Author(s):  
Eleanor Siler ◽  
Maren L. Friesen
Keyword(s):  
Genetic Differentiation ◽  
Frequency Dependence ◽  
Frequency Dependent Selection ◽  
Single Host ◽  
Legume Symbiosis ◽  
Negative Frequency Dependent Selection ◽  
Loss Of Diversity ◽  
Positive Frequency Dependence ◽  
Host Generation ◽  
Positive Frequency

The evolutionary origin and ecological maintenance of biodiversity is a central problem in biology. For diversity to be stable through time, each genotype or species must have an advantage when rare. This negative frequency-dependence prevents deterministic extinction and mitigates the stochastic loss of diversity (1–4). However, models of mutualism typically generate positive frequency-dependence that reduces diversity (5–8). Here, we report empirical evidence for negative frequency-dependence in the legume-rhizobium mutualism within a single host generation, a phenomenon that we term balancing nodulation. Balancing nodulation increases rare rhizobia across all 13 legume genera investigated to date, at high and low inoculum densities, and with minimal genetic differentiation between rhizobia strains. While the mechanism generating this phenomenon is currently unknown, balancing nodulation could actively maintain variation in the rhizobia-legume symbiosis.

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