A5089379915- Botany, Ecology, and Taxonomy Studies
- Genetic diversity and population structure
- Plant Diversity and Evolution
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Botanical Research and Applications
- Plant and Fungal Species Descriptions
- Botany and Geology in Latin America and Caribbean
- Biological Control of Invasive Species
- Plant Taxonomy and Phylogenetics
- Plant Pathogens and Fungal Diseases
- Genomics and Phylogenetic Studies
- Species Distribution and Climate Change
- Mediterranean and Iberian flora and fauna
- Biochemical and Structural Characterization
- Pacific and Southeast Asian Studies
- Rangeland and Wildlife Management
- Mycorrhizal Fungi and Plant Interactions
- Environmental Conservation and Management
- Identification and Quantification in Food
- Botany and Plant Ecology Studies
- Ethnobotanical and Medicinal Plants Studies
- Marine and coastal plant biology
- Cocoa and Sweet Potato Agronomy
- Plant Pathogens and Resistance
Fort Lewis College
2009-2022
Universidad Nacional Autónoma de México
2007-2019
Ohio University
2001-2007
Premise With digitization and data sharing initiatives underway over the last 15 years, an important need has been prioritizing specimens to digitize. Because duplicate are shared among herbaria in exchange gift programs, we investigated extent which unique biogeographic held small vs. these being redundant with those by larger institutions. We evaluated specimen contributions that make understanding at county, locality, temporal scales. Methods sampled herbarium of 40 plant taxa from each...
Abstract The repeated, rapid and often pronounced patterns of evolutionary divergence observed in insular plants, or the ‘plant island syndrome’, include changes leaf phenotypes, growth, as well acquisition a perennial lifestyle. Here, we sequence describe genome critically endangered, Galápagos-endemic species Scalesia atractyloides Arnot., obtaining chromosome-resolved, 3.2-Gbp assembly containing 43,093 candidate gene models. Using combination fossil transposable elements, k -mer spectra...
Although the genetic diversity and structure of in situ populations has been investigated thousands studies, composition ex plant rarely studied. A better understanding how much is conserved situ, it distributed among locations (e.g., botanic gardens), what minimum sample sizes are needed necessary to improve conservation outcomes. Here we address these issues a threatened desert oak species,
and southeastern United States. We analyzed the biogeographic patterns of this species to answer a series questions regarding its historical dispersal recent range expansion, relationships disjunct population in southern Ohio using combination genetic analyses based on Inter-Simple Sequence Repeat markers (ISSR) herbarium studies. Amounts diversity showed marked reduction marginal populations far north northeast range, corresponding areas where records show has become naturalized during past...
The patterns of genetic and morphological diversity a widespread species can be influenced by environmental heterogeneity the degree connectivity across its geographic distribution. Here, we studied Quercus havardii Rydb., uniquely adapted desert oak endemic to Southwest region United States, using genetic, morphometric, datasets over various scales quantify differentiation understand forces influencing population divergence. First, quantified variation analyzing 10 eastern 13 western...
Abstract Laelia speciosa is an endangered epiphytic orchid endemic to central Mexico. Here, we report on the development of 14 perfect and imperfect microsatellite repeat loci for this species. Numbers alleles ranged from two 16 levels observed heterozygosities among 0.28 1.00 across widely divergent populations. All were also tested cross‐amplification in four other species selected genera subtribe Laeliinae.
Guaiacum unijugum is a rare shrub endemic to 70 km stretch of coastline extending east from San José del Cabo in Baja California and the least well-known 4 species Mexico. To increase our knowledge this assess its conservation status we surveyed extent occurrence using both herbarium material field work, assessed levels genetic diversity, determined phylogenetic relationships, completed an evaluation risk extinction (MER). Herbarium identified 5 known localities with work verifying continued...
Microsatellite primers were isolated from the microendemic and threatened species Coccoloba cereifera, a shrub known only small region in Serra do Cipó, Brazil. Thirteen primer pairs amplifying perfect imperfect microsatellite regions tested 40 individuals one occurrence of species. Number alleles ranged two to six levels observed heterozygosities 0.21 0.95. These markers will be useful for analysis questions concerning population genetic structure assist providing information future...
Laelia speciosa is an orchid species listed as threatened of extinction in the Mexican standard NOM-059. Wild populations L. have been declining due to fragmentation its habitat and massive extraction for trading local markets Mexico. In this study, we aimed evaluate evolutionary potential within a fragmented landscape ca. 4000 km 2 Cuitzeo basin, State Michoacán. We sampled 15 throughout basin amplified eight nuclear microsatellite markers assess genetic diversity, structure, connectivity...
Two new species, one variety, and a combination of Froelichia are described from North America. xantusii Baja California Sur is being recognized as species endemic to southern separate F. interrupta in which it had been previously included. Within two varieties here recognized, the newly var. colimensis Nayarit Oaxaca in- terrupta alata Sonoran Desert. latifolia eastern Texas has segregated widespread floridana. A key genus America also The Moench group 16 spe- cies, varieties, five...
Inter–simple sequence repeat (ISSR) molecular markers were used to characterize inter‐ and intrapopulation genetic diversity in populations of two contrasting species Viola, Viola striata the eastern United States Canada grahamii central Mexico. Both show a mixed breeding system with production both chasmogamous cleistogamous flowers, although temporal pattern flowering varies between species. In majority seeds produced given season are result flowers; additionally, V. reproduces asexually...
The genus Quercus represents an important component of the scrublands and low forests Four Corners area northeastern Arizona, southeastern Utah, southwestern Colorado, northwestern New Mexico. is dominated by widespread gambelii, although relictual marginal populations Q. turbinella havardii are also present. Hybridization among these 3 species common, leading to much variability in phenotypic traits, this hybridization forms part complex hybrid oaks recognized as x undulata. Multivariate...
Abstract Froelichia floridana (cottonweed) occurs as a disjunct population along the Ohio River in southeastern Ohio. The anomalous occurrence of F. this area has led to its designation state endangered species and management regime maintain habitat conditions which it occurs. As part effort, restoration site was established on public lands 1984 from seed collected areas threatened by development. This study seeks determine demographic characteristics restored non‐restored managed sites...
Guaiacum coulteri is a dry forest hardwood species of conservation concern endemic to the Pacific coast Mexico. Fifteen microsatellite markers were developed which show high levels polymorphism across two populations with number alleles ranging from four 21. Most loci additionally exhibited consistent multiple banding patterns, indicating likely polyploidy this species. All tested for cross-amplification most found amplify well genus Guaiacum, although amplification in other related genera...
Background: Epiphytic plants exist within the complex three-dimensional habitat of tree canopy. This can have a profound effect on patterns both genetic diversity and structure may be important for conservation epiphytic species. Objective: To evaluate how habit affects fine-scale in single canopy populations. Studied species: Laelia speciosa , threatened endemic Mexican orchid. Study site dates: Field sampling occurred during Spring 2006 municipality Caurio de Guadalupe, Michoacán. Methods:...
Changes to the taxonomy of Quercus section Lobatae subsection Racemiflorae occurring in western Mexico are here made reflect new evidence regarding species relationships two lineages southern Sierra Madre Occidental. The name Q. pennivenia is resurrected recognize plants previously included under urbanii. A taxon, huicholensis, described represent a distinct lineage segregated from conzattii. With these nomenclatural changes we consist six taxa and provide key for their determination.