Search Results - "Nason, John"

Extraordinarily precise nematode sex ratios: adaptive responses to vanishingly rare mating opportunities by Van Goor, Justin, Herre, Edward Allen, Gómez, Adalberto, Nason, John D

“…Sex ratio theory predicts both mean sex ratio and variance under a range of population structures. Here, we compare two genera of phoretic nematodes ( and…”
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Landscape modelling of gene flow: improved power using conditional genetic distance derived from the topology of population networks by Dyer, Rodney J, Nason, John D, Garrick, Ryan C

“…Landscape genetics is a burgeoning field of interest that focuses on how site-specific factors influence the distribution of genetic variation and the genetic…”
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Differential effects of nematode infection on pollinating and non‐pollinating fig wasps: Can shared antagonism provide net benefits to a mutualism? by Van Goor, Justin, Piatscheck, Finn, Houston, Derek D., Nason, John D.

“…Species pairs that form mutualistic associations are also components of broader organismal community networks. These interaction networks have shaped the…”
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Lack of genetic isolation by distance, similar genetic structuring but different demographic histories in a fig‐pollinating wasp mutualism by Tian, Enwei, Nason, John D, Machado, Carlos A, Zheng, Linna, Yu, Hui, Kjellberg, Finn

“…Historical abiotic factors such as climatic oscillations and extreme climatic events as well as biotic factors have shaped the structuring of species' genetic…”
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Nuclear and chloroplast DNA phylogeography of Ficus hirta: obligate pollination mutualism and constraints on range expansion in response to climate change by Yu, Hui, Nason, John D.

“…This study uses a phylogeographic approach to investigate how interspecific interactions in an obligate pollination mutualism enhance or constrain dispersal…”
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Differential lineage-specific amplification of transposable elements is responsible for genome size variation in Gossypium by Hawkins, Jennifer S, Kim, HyeRan, Nason, John D, Wing, Rod A, Wendel, Jonathan F

“…The DNA content of eukaryotic nuclei (C-value) varies approximately 200,000-fold, but there is only a approximately 20-fold variation in the number of…”
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Plant connectivity underlies plant-pollinator-exploiter distributions in Ficus petiolaris and associated pollinating and non-pollinating fig wasps by Duthie, A. Bradley, Nason, John D.

“…Mutualism is ubiquitous in nature, and nursery pollination mutualisms provide a system well suited to quantifying the benefits and costs of symbiotic…”
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A phylogenetic comparative method for evaluating trait coevolution across two phylogenies for sets of interacting species by Adams, Dean C., Nason, John D.

“…Evaluating trait correlations across species within a lineage via phylogenetic regression is fundamental to comparative evolutionary biology, but when traits…”
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Genome‐wide sequence data show no evidence of hybridization and introgression among pollinator wasps associated with a community of Panamanian strangler figs by Satler, Jordan D., Herre, Edward Allen, Heath, Tracy A., Machado, Carlos A., Zúñiga, Adalberto Gómez, Nason, John D.

“…The specificity of pollinator host choice influences opportunities for reproductive isolation in their host plants. Similarly, host plants can influence…”
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Inferring processes of coevolutionary diversification in a community of Panamanian strangler figs and associated pollinating wasps by Satler, Jordan D., Herre, Edward Allen, Jandér, K. Charlotte, Eaton, Deren A. R., Machado, Carlos A., Heath, Tracy A., Nason, John D.

“…The fig and pollinator wasp obligate mutualism is diverse (~750 described species), ecologically important, and ancient (~80 Ma). Once thought to be an example…”
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Comparison of quantitative and molecular genetic variation of native vs. invasive populations of purple loosestrife (Lythrum salicaria L., Lythraceae) by Chun, Young Jin, Nason, John D, Moloney, Kirk A

“…Study of adaptive evolutionary changes in populations of invasive species can be advanced through the joint application of quantitative and population genetic…”
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Genetic tracking of density‐dependent adult recruitment: A case study in a subtropical oak by Tong, Xin, Nason, John D., Ding, Yuan‐Yuan, Chen, Xiao‐Yong, Zhou, Shurong

“…Density‐dependent recruitment is fundamental to understanding species diversity and community dynamics in plants. Although there is compelling evidence that…”
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Population Graphs: the graph theoretic shape of genetic structure by Dyer, Rodney J., Nason, John D.

“…Patterns of intraspecific genetic variation result from interactions among both historical and contemporary evolutionary processes. Traditionally, population…”
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Trade-Offs and Coexistence in Fluctuating Environments: Evidence for a Key Dispersal-Fecundity Trade-Off in Five Nonpollinating Fig Wasps by Duthie, A. Bradley, Abbott, Karen C., Nason, John D.

“…The ecological principle of competitive exclusion states that species competing for identical resources cannot coexist, but this principle is paradoxical…”
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Slatkin's Paradox: when direct observation and realized gene flow disagree. A case study in Ficus by Yu, Hui, Nason, John D, Ge, Xuejun, Zeng, Jiqing

“…In flying insects, there is frequently a lack of congruence between empirical estimates of local demographic parameters and the prediction that differentiation…”
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Significant demographic and fine-scale genetic structure in expanding and senescing populations of the terrestrial orchid Cymbidium goeringii (Orchidaceae) by Chung, Mi Yoon, Nason, John D., Chung, Myong Gi

“…Premise of the study: Fine-scale genetic structure (FSGS) in plants is influenced by variation in spatial and temporal demographic processes. To determine how…”
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Pollinator and host sharing lead to hybridization and introgression in Panamanian free‐standing figs, but not in their pollinator wasps by Satler, Jordan D., Herre, Edward Allen, Heath, Tracy A., Machado, Carlos A., Gómez Zúñiga, Adalberto, Jandér, K. Charlotte, Eaton, Deren A. R., Nason, John D.

“…Obligate pollination mutualisms, in which plant and pollinator lineages depend on each other for reproduction, often exhibit high levels of species…”
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Flowering asynchrony and mating system effects on reproductive assurance and mutualism persistence in fragmented fig-fig wasp populations by Gates, Daniel J., Nason, John D.

“…Premise of the study: Plants and animals may experience reproductive Allee effects in fragmented populations, and obligate pollination mutualisms may be…”
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Origins, distribution, and local co-occurrence of polyploid cytotypes in Solidago altissima (Asteraceae) by Halverson, Kristy, Heard, Stephen B, Nason, John D, Stireman, John O., III

“…There is growing realization that intraspecific polyploidy in plants has important implications for the evolution of plant diversity and for plant and…”
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Trade-Offs and Coexistence: A Lottery Model Applied to Fig Wasp Communities by Duthie, A. Bradley, Abbott, Karen C., Nason, John D.

“…Ecological communities in which organisms complete their life cycles on discrete ephemeral patches are common and often support an unusually large number of…”
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