Sentences with phrase «species of diatoms»

To reconstruct the past evolution of the Cosgrove Ice Shelf, Minzoni and her team examined multiple characteristics of the core sediments, including grain size and layering, carbon and nitrogen levels, and species of diatoms and foraminifera.

Out of the vast diversity of plankton in the oceans, the worst offenders are a few species of diatoms, dinoflagellates and cyanobacteria, collectively called harmful algae.

Not exact matches

The aim of my PhD is to use the distribution of diatom species preserved in sediment cores across the Scotia Sea to reconstruct the position of major ocean boundaries and water masses through time.

Previously, many water managers in the region had believed that the algae blooms of the diatom Didymosphenia geminata — which resemble blobs of wet toilet paper or shag rugs — resulted from an invasive species problem starting in the mid-2000s that could be fixed by regular washing of fishing gear and other sanitation measures.

During this cruise we are looking at the diatom species currently living in the surface waters in order to develop our understanding of their habitats.

Biologists from the University of Geneva (UNIGE), Switzerland, have succeeded in establishing a water quality index based solely on the DNA sequences of the diatoms present in the samples, without needing to identify each species visually.

The «space station» is a primitive diatom of the species Stephanodiscus, and the «shuttle craft» are scales from algal cysts, dormant forms of algae.

At present, scientists have no way to ensure that the desired species of silica - shelled diatoms bloom.

Diatoms are also quite numerous, with the estimated number of species exceeding one million.

Psudeo - nitzschia «Pseudo-nitzschia is a marine planktonic diatom genus containing some species capable of producing the neurotoxin domoic acid (DA), which is responsible for the neurological disorder known as amnesic shellfish poisoning (ASP).»

Once the silicate in the water is used up, the population of diatoms will drop and you will no longer have the same distribution of phytoplankton species.

The predicted continuous warming trend of the ocean surface temperature is expected to favour the growth of smaller phytoplankton cells (picophytoplankton replacing large diatoms) that in turn would also favour small - sized zooplankton species (Li et al. 2009).

In the final paper of this issue, Tatters et al. [66] study the competitiveness of natural diatom communities incubated under future environmental conditions for two weeks, after which the dominant species were isolated and then incubated again for over a year before recombining the now conditioned species to reconstruct the original community.