A5004371968- Marine and coastal plant biology
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Diatoms and Algae Research
- Protist diversity and phylogeny
- Algal biology and biofuel production
- Coastal wetland ecosystem dynamics
- Lichen and fungal ecology
- Marine and coastal ecosystems
- Polar Research and Ecology
- Genomics and Phylogenetic Studies
- Legume Nitrogen Fixing Symbiosis
- Bryophyte Studies and Records
- Marine Bivalve and Aquaculture Studies
- Environmental DNA in Biodiversity Studies
- Genetic diversity and population structure
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fern and Epiphyte Biology
- Plant and Fungal Species Descriptions
- Mycorrhizal Fungi and Plant Interactions
- Plant Pathogens and Fungal Diseases
- Seaweed-derived Bioactive Compounds
- Botany and Plant Ecology Studies
- Echinoderm biology and ecology
- Botanical Research and Applications
University of Alabama
2014-2024
University of Louisiana at Lafayette
2000-2003
University of North Carolina Wilmington
1992-1996
Given the problems of species delimitation in algae using morphology or sexual compatibility, molecular data are becoming standard for delimiting and testing their traditional boundaries. The idea that separately evolving metapopulation lineages, along with theoretical progress phylogenetic population genetic analyses, has led to development new methods delimitation. We review these recent developments DNA-based methods, discuss how they have changed continue change our understanding algal...
Abstract The green plants (Viridiplantae) are an ancient group of eukaryotes comprising two main clades: the Chlorophyta, which includes a wide diversity algae and Streptophyta, consists freshwater land plants. early-diverging lineages Viridiplantae comprise unicellular multicellularity has evolved independently in clades. Recent molecular data have revealed unrecognized lineage plants, Palmophyllales, with unique form typically found deep water. phylogenetic position this enigmatic group,...
Phylogenetic relationships in the green algal phylum Chlorophyta have long been subject to debate, especially at higher taxonomic ranks (order, class). The among three traditionally defined and well-studied classes, Chlorophyceae, Trebouxiophyceae, Ulvophyceae are of particular interest, as these groups species-rich ecologically important worldwide. Different phylogenetic hypotheses proposed over past two decades monophyly individual classes has disputed on occasion. Our study seeks test by...
Species of Bryopsidales form ecologically important components seaweed communities worldwide. These siphonous macroalgae are composed a single giant tubular cell containing millions nuclei and chloroplasts, harbor diverse bacterial communities. Little is known about the diversity chloroplast genomes (cpDNAs) in this group, possible consequences intracellular bacteria on genome composition host. We present complete cpDNAs Bryopsis plumosa Tydemania expeditiones, as well re-annotated cpDNA B....
Sequencing mitochondrial and chloroplast genomes has become an integral part in understanding the genomic machinery phylogenetic histories of green algae. Previously, only three (Oltmannsiellopsis viridis, Pseudendoclonium akinetum, Bryopsis hypnoides) two (O. viridis P. akinetum) from class Ulvophyceae have been published. Here, we present first ecologically economically important marine, algal genus Ulva. The genome Ulva sp. was 99,983 bp a circular-mapping molecule that lacked inverted...
Klebsormidium is a cosmopolitan genus of green algae, widespread in terrestrial and freshwater habitats. The classification entirely based on morphological characters, very little understood about its phylogeny at the species level. We investigated diversity phylogenetic relationships urban habitats Europe by combination approaches including examination field-collected material, culture experiments conducted many different combinations factors, analyses rbcL gene. European cities mainly...
Plocamium cartilagineum is a common red alga on the benthos of Antarctica and can be dominant understory species along western Antarctic Peninsula. Algae from this region have been studied chemically, like “P. cartilagineum” other worldwide locations where it common, rich in halogenated monoterpenes, some which implicated as feeding deterrents toward sympatric algal predators. Secondary metabolites are highly variable alga, both qualitatively quantitatively, leading us to probe individual...
The order Trentepohliales is a widespread group of terrestrial green algae. As currently circumscribed, it includes six genera ( Cephaleuros , Phycopeltis Physolinum Printzina Stomatochroon and Trentepohlia ), the phylogenetic affinities which are poorly understood. Sequences for small subunit rRNA gene (18S rDNA) were obtained several representatives analyses based on these sequences compared with traditional system classification morphological characters. results indicate that criteria...
Abstract The genus Ulva Linnaeus 1753 is well known for its global distribution and containing many taxonomically debated species. Their morphological plasticity cryptic nature overrepresent underrepresent, respectively, the biodiversity of these difficulty in morphologically identifying species has led to accumulation names that are currently considered synonyms. correct identification crucial due their significant role marine ecosystems mariculture. In last 30 years, several checklists...
Phylogenetic analyses of the nuclear-encoded small-subunit rDNA sequences from taxa representing all major lineages green algae, including new for Trentepohliales, consistently indicated that subaerial Trentepohliales are closely related to ulvophycean marine particularly siphonous and hemisiphonous orders. The presence phragmoplast-type cytokinesis in order remains enigmatic, it is interesting this type cell division associated with terrestrial (subaerial) habits.
Climate change has profound impacts on marine biodiversity and changes in turn might affect the community sensitivity to of abiotic changes. We used mesocosm experiments Next Generation Sequencing study response natural Baltic Mediterranean unicellular eukaryotic plankton communities (control +6oC heat shock) subsequent salinity (-5 psu, +5 psu). The impact Operational Taxonomic Unit (OTU) richness, taxonomic functional composition rRNA:rDNA ratios were examined. Our results showed that...
Ulva (Ulvophyceae, Chlorophyta) is common in intertidal environments and can also be found freshwater ecosystems. The difficulty to morphologically identify species due cryptic diversity morphological plasticity has caused a taxonomic conundrum. Fortunately, molecular data have begun unravel better understanding of its diversity. Here, we present analysis with 247 samples from the Gulf Mexico Atlantic USA based on chloroplast (rbcL tufA) nuclear (ITS1-5.8S-ITS2) markers. Twenty-four taxa had...
The complete plastid genome sequence of the red macroalga Grateloupia taiwanensis S.-M.Lin & H.-Y.Liang (Halymeniaceae, Rhodophyta) is presented here. Comprising 191,270 bp, circular DNA contains 233 protein-coding genes and 29 tRNA sequences. In addition, several previously unknown to algal plastids are present in G. taiwanensis. genomes from another florideophyte, Gracilaria tenuistipitata var. liui, very similar share significant synteny. contrast, less synteny shared between...
Spongiochrysis hawaiiensis gen. et sp. nov. is described from material collected at two sites on O'ahu, Hawaiian Islands. This alga produced golden-yellow crusts the bark of Casuarina trees and consisted globular cells with an axial stellate chloroplast. The only form reproduction was a specialized type autosporulation in which budding-like division mother cell daughter different sizes. Phylogenetic analyses 18S rRNA gene showed that member freshwater clade Cladophorales/Siphonocladales...
Abstract Four species of the genus Trentepohlia were collected from French Guiana, including two new to science. chapmanii sp. nov. formed orange coatings on bamboo reeds and consisted a thick compact, pseudoparenchymatous prostrate part which numerous thin unbranched erect axes borne. infestans produced dark red discolorations many concrete walls crustose masses by globular or elliptical cells, cylindrical axes, supporting sporangiate laterals, arose. Regeneration laterals same was...