A5054191213- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Polar Research and Ecology
- Marine and coastal plant biology
- Genomics and Phylogenetic Studies
Universidade Federal do Rio Grande
2015-2023
University of Rio Grande and Rio Grande Community College
2021
The western Antarctic Peninsula (WAP) is a climatically sensitive region where foundational changes at the basis of food web have been recorded; cryptophytes are gradually outgrowing diatoms together with decreased size spectrum phytoplankton community. Based on 11-year (2008-2018) in-situ dataset, we demonstrate strong coupling between biomass accumulation cryptophytes, summer upper ocean stability, and mixed layer depth. Our results shed light environmental conditions favoring cryptophyte...
In many marine littoral and sublittoral benthic habitats, we find small diatoms with few features resolvable light microscopy (LM) other than internal costae across their valves. While classically those have defined identification classification, the use of electron molecular data started to reveal true diversity unrelated forms genera (e.g., Anaulus, Eunotogramma, Hustedtiella, or Plagiogramma) which possess these structures. Here describe new genus Ambo, in an attempt clarify some...
The diatom Asterionellopsis glacialis sensu lato forms high-density patches in the surf zone of some sandy beaches worldwide and was until recently considered a cosmopolitan species. With recent description four cryptic species, identity specimens found these accumulations remains uncertain. In this study, were sampled from two Brazilian coast: one tropical (Futuro Beach, 3° S; 38° W) subtropical (Cassino 32° 52° W). Fine structure frustules sequencing three phylogenetic markers revealed...
Several automated molecular methods have emerged for distinguishing eukaryote species based on DNA sequence data. However, there are knowledge gaps around which of these single-locus is more accurate the identification microalgal species, such as highly diverse and ecologically relevant diatoms. We applied genetic divergence, Automatic Barcode Gap Discovery primary delimitation (ABGD), Assemble Species by Partitioning (ASAP), Statistical Parsimony Network Analysis (SPNA), Generalized Mixed...
Abstract “Surf diatoms” can form high biomass in the surf zone of sandy beaches around world, Asterionellopsis and Anaulus being main genera this group Brazil. glacialis was considered a cosmopolitan species, taxonomic studies using molecular morphological tools showed that A. is complex with cryptic semicryptic species. So, it would be plausible to suppose australis , another patch-forming diatom wide latitudinal occurrence could also part species complex. We collected identified strains...