Publications by authors named "Tooba Varasteh"
Article Synopsis
- * The impact of environmental changes, like rising temperatures and pollution, can worsen disease conditions in aquaculture by enhancing pathogen virulence.
- * New technologies and biotechnological tools, such as probiotics and metagenomics, are being developed to improve sustainability in aquaculture while reducing the need for antibiotics and better understanding disease mechanisms.
Article Synopsis
- Endosymbionts are tiny organisms that live inside corals and are super important for their health.
- Pollution in the ocean, especially from oil spills and toxic substances like a dispersant called Corexit-9500, can seriously hurt these endosymbionts.
- When exposed to oil and dispersants, two types of endosymbionts showed a big drop in their survival and ability to perform photosynthesis, meaning they can't grow properly and get damaged quickly.
Article Synopsis
- Microbes are crucial for the health of coral reefs, but their abundance is influenced by various physical-chemical and biological factors that are not fully understood.
- This study used machine learning to analyze 665 seawater samples from the Abrolhos reefs in the Southwest Atlantic to identify key factors impacting microbial abundance.
- Findings revealed that factors like hydrodynamic conditions, Dissolved Organic Carbon (DOC), and Total Nitrogen (TN) significantly affect microbial levels, with higher temperatures and nutrient concentrations potentially weakening coral resilience.
Article Synopsis
- Corals face threats from global warming, with bleaching caused by the loss of symbiotic dinoflagellates being a significant immediate impact.
- The study explores how increased temperatures affect the biochemical and cellular characteristics of these important endosymbionts, showing that heat stress leads to an increase in oxygen levels while causing a decrease in key proteins and pigments.
- Observations via transmission electron microscopy reveal that heat stress compromises the structural integrity of the dinoflagellates, resulting in thinner cell walls, chloroplast deformation, and an accumulation of lipid droplets after just three days at elevated temperatures.
A transcriptomic profile of Sargassococcus simulans 103B3, isolated from the coral Mussismilia braziliensis in Abrolhos, Brazil, is presented. A total of 631.3 Mbp transcriptomic sequences were obtained.
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- Madracis decactis, a widely distributed coral species, relies on its relationship with various symbionts to understand its habitat needs and environmental adaptability.
- This study used advanced phylogenetic analysis to evaluate the symbiont associations of Madracis in the Southwest Atlantic Ocean, revealing a complex interaction rather than a single symbiont association as previously believed.
- Findings indicate that Madracis can host multiple types of symbionts, enhancing its photosynthetic potential and possibly allowing it to thrive in a variety of environmental conditions.
Aquimarina litoralis CCMR20 originated from the coral Mussismilia braziliensis (Sebastião Gomes Reef, Brazil, summer 2010). To gain new insights into the genomic repertoire associated with symbioses, we obtained the genome sequence of this strains using Illumina sequencing. CCMR20 has a genome size of 6.
View Article and Find Full Text PDFPigmented bacterial symbionts play major roles in the health of coral holobionts. However, there is scarce knowledge on the diversity of these microbes for several coral species. To gain further insights into holobiont health, pigmented bacterial isolates of Fabibacter pacificus (Bacteroidetes; n = 4), Paracoccus marcusii (Alphaproteobacteria; n = 1), and Pseudoalteromonas shioyasakiensis (Gammaproteobacteria; n = 1) were obtained from the corals Mussismilia braziliensis and Montastraea cavernosa in Abrolhos Bank, Brazil.
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