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Plankton
- These protists exist in freshwater and marine habitats, and are a component of plankton, the typically microscopic organisms that drift through the water and serve as a crucial food source for larger aquatic organisms.
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What is the role of protists in marine biogeochemical cycles?
What is a marine protist?
Are protists a microbial entity?
What is a fungus-like protist saprobe?
Marine saprobic protists have the essential function of returning inorganic nutrients to the water. This process allows for new algal growth, which in turn generates sustenance for other organisms along the food chain.
The other subgroup of chromalveolates, the stramenopiles, includes photosynthetic marine algae and heterotrophic protists. The unifying feature of this group is the presence of a textured, or “hairy,” flagellum. Many stramenopiles also have an additional flagellum that lacks hair-like projections (). Members of this subgroup range in size ...
- OpenStaxCollege
- 2012
- Eukaryotic supergroups. This diagram shows a proposed classification of the domain Eukarya. Currently, the domain Eukarya is divided into six supergroups.
- Glaucocystis. (credit: By ja:User:NEON / commons:User:NEON_ja – Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1706641)
- Volvox. Volvox aureus is a green alga in the supergroup Archaeplastida. This species exists as a colony, consisting of cells immersed in a gel-like matrix and intertwined with each other via hair-like cytoplasmic extensions.
- A multinucleate alga. Caulerpa taxifolia is a chlorophyte consisting of a single cell containing potentially thousands of nuclei. (credit: NOAA).
- Eukaryotic supergroups. This diagram shows a proposed classification of the domain Eukarya. Currently, the domain Eukarya is divided into six supergroups.
- Glaucocystis. (credit: By ja:User:NEON / commons:User:NEON_ja – Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1706641)
- Volvox. Volvox aureus is a green alga in the supergroup Archaeplastida. This species exists as a colony, consisting of cells immersed in a gel-like matrix and intertwined with each other via hair-like cytoplasmic extensions.
- A multinucleate alga. Caulerpa taxifolia is a chlorophyte consisting of a single cell containing potentially thousands of nuclei. (credit: NOAA).
23-3-. The cellular slime molds function as independent amoeboid cells when nutrients are abundant. When food is depleted, cellular slime molds aggregate into a mass of cells that behaves as a single unit, called a slug. Some cells in the slug contribute to a 2–3-millimeter stalk, drying up and dying in the process.
The pellicle functions like a flexible coat of armor, preventing the protist from being torn or pierced without compromising its range of motion. Figure 5.4.4 5.4. 4: The pellicle of a euglenid can be seen here as the thread-like structures on the right side of the organism. Deuterostome CC-SA-3.0.
Abstract. Diversity within marine microbiomes spans the three domains of life: microbial eukaryotes (i.e., protists), bacteria, and archaea. Although protists were the first microbes observed by microscopy, it took the advent of molecular techniques to begin to resolve their complex and reticulate evolutionary history.
