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For many years the diatoms—treated either as a class (Bacillariophyceae) or a phylum (Bacillariophyta)—were divided into just 2 orders, corresponding to the centric and the pennate diatoms (Centrales and Pennales; alternative names Biddulphiales and Bacillariales, as used e.g. in Lee, 1989). [9]
Within the diatoms (Bacillariophyta), harmful effects can be due to physical damage or to toxin production. Centric diatoms like Chaetoceros live as colonial chains of cells with long spines (setae) that can clog fish gills, causing their death.
3) constitute nearly 90 and <10% of dissolved inorganic carbon (DIC) respectively, while dissolved CO 2 (CO 2 aqueous) contributes <1%. Despite this low level of CO 2 in the ocean and its slow diffusion rate in water, diatoms fix 10–20 GtC annually via photosynthesis thanks to their carbon dioxide concentrating mechanisms , allowing them to ...
Gyrista is a phylum of heterokont protists containing three diverse groups: the mostly photosynthetic Ochrophyta, the parasitic Pseudofungi, and the recently described group of nanoflagellates known as Bigyromonada. [2] Members of this phylum are characterized by the presence of a helix or a double helix/ring system in the ciliary transition ...
Animal Ark is a children's book series written by a collection of authors under the direction of Ben M. Baglio using the pseudonym Lucy Daniels starting in 1994. [1] They have now been published in the USA under the name Ben M. Baglio as a pseudonym for the authors who write the books.
I Can Lick 30 Tigers Today! and Other Stories is a 1969 children's story book by Dr. Seuss. According to the inside cover, the three stories in the collection concern The Cat in the Hat's son, "great great great great grandfather", and daughter, respectively. The book's illustrations are notable for their use of gouache and brush strokes ...
Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in fresh water, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous for
Other dinoflagellates are unpigmented predators on other protozoa, and a few forms are parasitic (for example, Oodinium and Pfiesteria). Some dinoflagellates produce resting stages, called dinoflagellate cysts or dinocysts , as part of their lifecycles; this occurs in 84 of the 350 described freshwater species and a little more than 10% of the ...