A5064036555- Mycorrhizal Fungi and Plant Interactions
- Plant Pathogens and Fungal Diseases
- Lichen and fungal ecology
- Species Distribution and Climate Change
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Yeasts and Rust Fungi Studies
- Cephalopods and Marine Biology
- Protist diversity and phylogeny
- Bryophyte Studies and Records
- Genomics and Phylogenetic Studies
- Plant-Microbe Interactions and Immunity
- Invertebrate Taxonomy and Ecology
- Fungal Biology and Applications
- Microbial Community Ecology and Physiology
- Primate Behavior and Ecology
- Plant Pathogens and Resistance
- Diatoms and Algae Research
- Plant Parasitism and Resistance
- Botany and Plant Ecology Studies
Duke University
2018-2023
Universidad de Los Andes
2015-2020
AbstractOver the past century, ecologists have attempted to understand patterns of species diversity by showing stable coexistence arising from a baseline expectation competitive exclusion. This stems an explicit assumption resource scarcity and implicit assumptions Malthusian struggle winner-takes-all dynamics. Fidelity exclusion principle (CEP) presents as paradox: if compete for limited resources, how can they coexist? In this article, we investigate contradiction between theoretical...
Colletotrichum species cause typical anthracnose symptoms in tree tomato and mango. To characterize of these two crops Colombia, 91 isolates were collected from several localities. Phylogenetic analyses using nuclear gene sequencing the ITS region glyceraldehyde 3‐phosphate dehydrogenase ( GAPDH ) allowed identification three groups: acutatum, gloeosporioides boninense. These groups further confirmed additional genomic regions chitin synthase 1 actin for 30 representative previously...
Shifts in climate along elevation gradients structure mycobiont-photobiont associations lichens. We obtained mycobiont (lecanoroid Lecanoraceae) and photobiont (Trebouxia alga) DNA sequences from 89 lichen thalli collected Bolivia a ca. 4,700 m gradient encompassing diverse natural communities environmental conditions. The molecular dataset included six loci (ITS, nrLSU, mtSSU, RPB1, RPB2, MCM7) two rbcL); we designed new primers to amplify Lecanoraceae RPB1 RPB2 with nested PCR approach....
Species circumscription is key to the characterization of patterns specificity in symbiotic systems at a macroevolutionary scale. Here, worldwide phylogenetic framework was used assess biodiversity and association among partners trimembered lichens from genus Peltigera, section Chloropeltigera. We sequenced six loci main fungal partner performed species discovery validation analyses establish putative boundaries. Single locus phylogenies were identity both photobionts, Nostoc...
Abstract Prokaryotic genomes are often considered to be mosaics of genes that do not necessarily share the same evolutionary history due widespread horizontal gene transfers (HGTs). Consequently, representing relationships prokaryotes as bifurcating trees has long been controversial. However, studies reporting conflicts among derived from phylogenomic data sets have shown these can result artifacts or processes other than HGT, such incomplete lineage sorting, low phylogenetic signal, and...
Applying molecular methods to fungi establishing lichenized associations with green algae or cyanobacteria has repeatedly revealed the existence of numerous phylogenetic taxa overlooked by classical taxonomic approaches. Here, we report taxonomical conclusions based on multiple species delimitation and validation analyses performed an eight-locus dataset that includes world-wide representatives dolichorhizoid scabrosoid clades in section
Abstract Closely related lichen-forming fungal species circumscribed using phenotypic traits (morphospecies) do not always align well with phylogenetic inferences based on molecular data. Using multilocus data obtained from a worldwide sampling, we inferred relationships among five currently accepted morphospecies of Peltigera section Peltidea ( P. aphthosa group). Monophyletic circumscription all recognized britannica, chionophila, frippii and malacea ) except , which contained britannica...
Biotic specialization holds information about the assembly, evolution, and stability of biological communities. Partner availabilities can play an important role in enabling species interactions, where uneven partner bias estimates biotic when using phylogenetic diversity indices. It is therefore to account for availability characterizing phylogenies. We developed index, structure (PSS), that avoids from by uncoupling null models interaction frequency distance. incorporate deviation between...
Amanita is a worldwide-distributed fungal genus, with approximately 600 known species. Most species within the genus are ectomycorrhizal (ECM), some saprotrophic representatives. In this study, we constructed first comprehensive phylogeny including ECM from Colombia collected in native Quercus humboldtii forests and introduced Pinus patula plantations. We included 8 (A. brunneolocularis, A. colombiana, flavoconia, fuligineodisca, muscaria, rubescens, sororcula, xylinivolva) out of 16...
An important constraint for crop production in Colombia is the high incidence of anthracnose caused by Colletotrichum species. Although several studies have focused on these fungi, relationship between different fungal species within genus and their hosts whether they display any host preference or specificity has yet to be examined. In Colombia, diseases are particularly severe mango ( Mangifera indica ) tree tomato Solanum betaceum crops. a previous investigation, phylogenetic attacking...
Abstract Peltigera globulata Miadl. & Magain, a new species in the P. ponojensis/monticola complex of section , is formally described. This clade was previously given interim designation sp. 17. It found sun-exposed and xeric habitats at high altitudes Peru Ecuador. can be easily recognized by its irregularly globulated margins covered mostly thick, white pruina, somewhat resembling sorediate thallus soredians another South American from . The hypervariable region ITS1 (ITS1-HR), which...
Peltigera hydrophila, a new species from Chile tentatively distinguished based on phylogenetic evidence but not yet named, is formally described here. Morphological differences (e.g., non-tomentose thallus) and habitat preferences (semi-aquatic) corroborate molecular distinctiveness of this early diverging lineage in section Peltigera. Due to overlapping ecological ranges, P. hydrophila shares some morphological traits with aquatic the phylogenetically unrelated Hydrothyriae.
Abstract The new genus Sinuicella , an early successional lichen, was found on bare soil in Oregon, USA. thallus is minute fruticose, grey to nearly black, branching isotomic dichotomous, branches round, 20–90 μm wide water mount. cortex composed of interlocking cells shaped like jigsaw puzzle pieces. Spores are hyaline, 1-septate, 25–40(–50) × 6.5–9(–11) μm. Maximum likelihood phylogenetic analyses multilocus data sets, first spanning the entire order Peltigerales and then restricted...
ABSTRACT Aim Identifying the mechanisms driving divergence in marine organisms is challenging as opportunities for allopatric isolation are less conspicuous than terrestrial ecosystems. Here, we aim to estimate a dated phylogeny of squid family Loliginidae, and perform ecological niche analyses explore biogeographic evolutionary patterns giving rise extant lineages this group, with particular focus on cryptic species population structure along western Atlantic coast. Location World-wide....
Summary Biotic specialization holds information about the assembly, evolution and stability of biological communities. Phylogenetic diversity metrics have been used to quantify biotic specialization, but their current implementations do not adequately account for availability interacting partners. Also, overdispersed pattern phylogenetic has misinterpreted as an attribute generalists. We developed approach that resolves these issues by accounting partner structure (i.e., clustered,...