Search Results - "Nason, John D"

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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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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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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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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Cascading host-associated genetic differentiation in parasitoids of phytophagous insects by Stireman, J.O. III, Nason, J.D, Heard, S.B, Seehawer, J.M

“…The extraordinary diversity of phytophagous insects may be attributable to their narrow specialization as parasites of plants, with selective tradeoffs…”
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Differential attack on diploid, tetraploid, and hexaploid Solidago altissima L. by five insect gallmakers by Halverson, Kristy, Heard, Stephen B, Nason, John D, Stireman, John O. III

“…Genetic variation among plants can influence host choice and larval performance in insect herbivores. Ploidy (cytotype) variation is a particularly dramatic…”
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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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Spatial genetic structure in populations of the terrestrial orchid Cephalanthera longibracteata (Orchidaceae) by Chung, Mi Yoon, Nason, John D., Chung, Myong Gi

“…Orchid seeds are unusual for being the smallest among flowering plants. These dust-like seeds are wind-borne and, thus, would seem to have the potential for…”
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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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The breeding structure of a tropical keystone plant resource by Nason, John D, Herre, E. Allen, Hamrick, J. L

“…Despite the recognized importance of maintaining viable populations of keystone plant resources in tropical wildlife parks and forested preserves, the critical…”
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Three-dimensional fine-scale genetic structure of the neotropical epiphytic orchid, Laelia rubescens by Trapnell, D.W, Hamrick, J.L, Nason, J.D

“…Epiphytic plants occupy three‐dimensional space, which allows more individuals to be closely clustered spatially than is possible for populations occupying two…”
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Patterns of hybridization and population genetic structure in the terrestrial orchids Liparis kumokiri and Liparis makinoana (Orchidaceae) in sympatric populations by Chung, M.Y, Nason, J.D, Chung, M.G

“…We investigated the potential for gene flow and genetic assimilation via hybridization between common and rare species of the terrestrial orchid genus Liparis,…”
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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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Implications of Clonal Structure for Effective Population Size and Genetic Drift in a Rare Terrestrial Orchid, Cremastra appendiculata by CHUNG, MI YOON, NASON, JOHN D., CHUNG, MYONG GI

“…Effective population size (Ne) influences the degree to which random genetic drift changes allele frequencies, increases inbreeding, and decreases genetic…”
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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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