Taxonomic Revision of South American Species of the Genus Acacia Subgenus Acacia (Fabaceae: Mimosoideae)

Ebinger, John E.; Seigler, David S.; Clarke, H. David

doi:10.2307/2666723

Cited by 39 publications

(37 citation statements)

References 27 publications

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“…1), we used two published phylogenies of the Acacieae (Robinson and Harris 2000;Miller and Bayer 2001), and a published phylogeny of the Ingeae (Grimes 1999). Relationships within Acacia subgenus Acacia are based on recent revisions and phenetic assessments of the species groups Ebinger 1988, 1995;Clarke et al 1989Clarke et al , 1990Lee et al 1989;Ebinger et al 2000;Jawad et al 2000). Relationships outside the Acacieae/Ingeae are based on recent molecular phylogenies of the Fabaceae and the relative classification of the Hologalegina to the Amorpheae in Kajita et al (2001), with the relationships between the three subfamilies treated as a polytomy due to a lack of support in resolving these nodes (Doyle 1994(Doyle , 1995Kajita et al 2001).…”

Section: Comparative Analysesmentioning

confidence: 99%

“…Why have Acacia specialists diverged from the model proposed by Ehrlich and Raven? The highly diverse species of New World Acacia have diversified rapidly, show little morphological differentiation in fruiting structures within the two subgenera, are often found co-existing within communities, and often hybridize (Janzen 1974;Ebinger 1988, 1995;Ebinger et al 2000;Jawad et al 2000). Conservative host shifts between Acacia species may therefore not present the intensive directional selection that would cause high levels of physiological specialization in their bruchine seed predators, and specialization in these species of Stator may occur through relations with parasitoids and interspecific competitors, or through geographic circumstances and the structure of communities.…”

Section: Specialization and Diversification In The Genus Statormentioning

confidence: 99%

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Ecological and Evolutionary Diversification of the Seed Beetle Genus Stator (Coleoptera: Chrysomelidae: Bruchinae)

Morse

Farrell

2005

Evolution

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Abstract. Ehrlich and Raven's (1964) hypothesis on coevolution has stimulated numerous phylogenetic studies that focus on the effects of plant defensive chemistry as the main ecological axis of phytophagous insect diversification. However, other ecological features affect host use and diet breadth and they may have very different consequences for insect evolution. In this paper, we present a phylogenetic study based on DNA sequences from mitochondrial and protein-coding genes of species in the seed beetle genus Stator, which collectively show considerable interspecific variation in host affiliation, diet breadth, and the dispersal stage of the seeds that they attack. We used comparative analyses to examine transitions in these three axes of resource use. We argue that these analyses show that diet breadth evolution is dependent upon colonizing novel hosts that are closely or distantly related to the ancestral host, and that oviposition substrate affects the evolution of host-plant affiliation, the evolution of dietary specialization, and the degree to which host plants are shared between species. The results of this study show that diversification is structured by interactions between different selective pressures and along multiple ecological axes.Key words. Coevolution, cytochrome oxidase 1, elongation factor 1-alpha, insect-plant interaction, molecular systematics, specialization. The extraordinary species diversity of phytophagous insects ranks as one of the major features of evolution (Simpson 1953) and there is a growing body of research aimed at describing the patterns of this diversity and explaining the processes that have caused it. Much of the impetus for this field is derived from Ehrlich and Raven's (1964) influential essay on butterfly and plant codiversification, in which they proposed that chemically diverging host-plant species form the main ecological axis along which phytophagous insects diversify. This coevolutionary model is essentially one of adaptive radiation in which a certain insect lineage colonizes a novel resource and then diversifies, both ecologically and evolutionarily, as its daughter lineages specialize onto the codiversifying host plants. Insect diet breadth becomes increasingly restricted as divergence in plant defensive chemistry creates increasing disruptive selection on host use. Ultimately this creates (1) a pattern of correlation, but not necessarily one of cospeciation, between insect and host-plant phylogenies (referred to in this paper as phylogenetic conservatism) accompanied by (2) increasing dietary specialization, the latter resulting in a consistent generalist-to-specialist phylogenetic polarity (phylogenetic trajectory). Because of the influence and explanatory power of this model, most research on the macroevolution of phytophagous insect diversification has focused on testing these specific hypotheses.Consistent empirical evidence for conservatism in host use by insects (e.g., Mitter et al.

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Section: Comparative Analysesmentioning

confidence: 99%

Section: Specialization and Diversification In The Genus Statormentioning

confidence: 99%

Ecological and Evolutionary Diversification of the Seed Beetle Genus Stator (Coleoptera: Chrysomelidae: Bruchinae)

Morse

Farrell

2005

Evolution

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“…In this region, V. aroma is present in different plant communities along a precipitation gradient ranging from 306 to 710 mm. Along the gradient, rainfall is concentrated in the warm season (October to April, Ebinger et al 2000), nevertheless in the dry sectors of the gradient the rain events becomes much more unpredictable. Hence, this precipitation gradient represents an excellent natural experiment to study interand intra-populations variability together.…”

mentioning

confidence: 99%

Inter- and intra-population variability in physical dormancy along a precipitation gradient

2017

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Physical dormancy enables plants that occur in temporally stochastic and harsh environments to survive; thus, within the distribution area of a species, the percentage of seeds with physical dormancy is expected to increase towards more arid and unpredictable areas. Th ere have been no previous studies evaluating both inter and intra-population variability in physical dormancy along a precipitation gradient. Th e aim of this study was to determine the interand intra-population variability in physical dormancy of seeds of Vachellia aroma (Fabaceae) along a precipitation gradient. We collected mature fruits from four localities along a precipitation gradient in central Argentina for an imbibition experiment using controlled germination chambers. Changes in physical dormancy were not found along the precipitation gradient; however, a trend toward higher percentage of seed imbibition (lower PY) at the most humid extreme of the gradient was observed. On the contrary, we did observed intra-population variability in three of the four populations, suggesting that most of the populations of V. aroma might have the ability to deal with the environmental variability encountered at local scale. Th is study highlights the importance of studying both interand intra-population variability in physical dormancy.

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“…A new population was discovered on Dismal Key, located within both the Ten Thousand Islands National Wildlife Refuge and Cape Romano -Ten Thousand Islands Aquatic Preserve, the later which is part of the Rookery Bay National Estuarine Research Reserve . In South Florida, poponax grows in tropical hardwood hammocks on shell mounds and in disturbed areas (Chokoloskee Island), but elsewhere within its native range it grows in a wide variety of habitats, including thickets, dry disturbed sites, rocky and gravelly soils, open pastures, and successional fields (Correll and Correll 1982, Clarke et al 1989, Ebinger et al 2000. Mortellaro et al (2012) ranked it as occurring more frequently in ruderal areas than natural areas.…”

Section: Introductionmentioning

confidence: 99%

“…Wunderlin & Hansen (2011) reported it to flower from spring through summer in Florida. Correll and Correll (1982) reported it to flower mostly from August to January in the Bahamas and it is known to flower throughout the year elsewhere in its range (Clarke et al 1989, Ebinger et al 2000. It is cultivated at Fairchild Tropical Botanic Garden (see below), but has never been observed to set fruit (M. Collins, pers.…”

Section: Introductionmentioning

confidence: 99%

Liverworts (Marchantiophyta) of Mahogany Hammock, Everglades National Park, Florida

Zona

Sadle²

2017

Evansia

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were coauthors both on IRC's book Rare Plants of South Florida (Gann et al. 2002) and Floristic Inventory of South Florida Database Online (Gann et al. 2001(Gann et al. -2014, without which this project would not have been possible.Bruce Hansen at the University of South Florida readily supplied herbarium label data and helped resolve confusing historical and taxonomic problems. Alan Franck, also at USF, and Mark Strong at the Smithsonian Institution, also provided herbarium label data, scans of images and other taxonomic assistance. The FNPS herbarium database online, which is managed by Fairchild Tropical Botanic Garden and the National Park Service, was indispensable to the project. Brett Jestrow at Fairchild provided label data and a review of specimens at FTG, and Fairchild interns Kristen Finch and Brittany Harris helped with rare plant ranking using the new NatureServe methodology, literature searches, and other tasks. Special thanks to Anne Frances and Amanda Treher of NatureServe and Amy Jenkins of FNAI for helping to normalize and update global, national and state ranks of rare plants. Jennifer Possley of Fairchild was of particular help working through some of the fern accounts. Celio Moya assisted with obtaining updated rare plant data from Cuba.

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Taxonomic Revision of South American Species of the Genus Acacia Subgenus Acacia (Fabaceae: Mimosoideae)

Cited by 39 publications

References 27 publications

Ecological and Evolutionary Diversification of the Seed Beetle Genus Stator (Coleoptera: Chrysomelidae: Bruchinae)

Ecological and Evolutionary Diversification of the Seed Beetle Genus Stator (Coleoptera: Chrysomelidae: Bruchinae)

Inter- and intra-population variability in physical dormancy along a precipitation gradient

Liverworts (Marchantiophyta) of Mahogany Hammock, Everglades National Park, Florida

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