Concept explainers
Just as the invasive Cauterpa seaweed often spreads uncontrollably when introduced to environments free of its normal predators and parasites, populations of toxin-producing dinoflagellates may grow explosively when released into new waters. Red tides have become increasingly common in recent years. One reason for this increased incidence is that dinoflagellate species that can cause red tides have been inadvertently spread around the world by humans. The dinoflagellates travel mainly in seawater that is pumped into the ballast tanks of cargo ships and then discharged at distant ports.
Sometimes, a protist released into a new environment has a damaging impact not because it overwhelms an ecosystem but because it directly causes a disease. What are some examples of such an introduced disease among the alveolates?
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Biology: Life on Earth with Physiology (11th Edition)
- Since diatoms are autotroph & dinoflagellates are mixotroph, how will this affect the distribution of each species in the ocean?arrow_forwardWhy are coral reefs not found in the regions from west bengal to andhra pradesh but are found in tamil nadu and on the east coast of india?arrow_forwardOrganisms interact with each other and the physical environment. Explain how the response of diatom population to a drop in nutrient availability can affect both other organisms and aspects of the physical environment (such as carbon dioxide concentration).arrow_forward
- With which of the following is a dinoflagellate associated?(a) Most usually have flagella and can carry out photosyn-thesis.(b) Some produce toxins that accumulate in the bodies ofshellfish.(c) Blooms of dinoflagellates are known as the ‘‘red tide.’’(d) Inhalation of air that contains small quantities of dino-flagellate toxin can cause respiratory membrane irrita-tion in sensitive individuals.(e) All of the above are characteristics associated withdinoflagellates.arrow_forwardMatch; Non-toxic dinoflagellate and Non-toxic dinoflagellate and diatoms: A. Low oxygen areas or dead zone B. Hypothermia on birdsarrow_forwardwrite an article on Cryptosporidium a pathogenic eukaryote parasite. What is the natural habitat for this organism? (water, soil, humans, plants, etc.) What clinical significance does this organism have for humans? (What disease/infections does it cause in humans?) What is the mode of transmission to humans? (How do you get an infection with this organism?) What is the worldwide geographic distribution for this organism? (Where is it found, where have there been reported cases or outbreaks lately?)arrow_forward
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- Dinoflagellates are unicellular, marine protists. Dinoflagellates are bioluminescent, but only at night. During the day, they carry out photosynthesis similar to other autotrophs. At night, however, they bioluminesce every time they are disturbed. They are often seen in the wakes of ships at night. While the reason for this bioluminescence is not fully understood, many scientists concur that it is a form of self-defense. If small fish begin to feed upon the protists, the protists will begin to bioluminesce. These flashes of light in the dark water can alert larger fish and draw them towards the small fish, upon which they prey. By making the small fish vulnerable, the dinoflagellates are able to protect themselves. Based on the information above, a researcher decides to design an experiment in which she is testing how long it takes for dinoflagellates to recover after different amounts of disturbance. She maintains 10 containers of dinoflagellates with similar temperature, salinity and…arrow_forwardSome _______ are bioluminescent and other live inside the bodies of corals. a. red algae b. diatoms c dinoflagellates d. radiolariaarrow_forwardRuminants (like cattle) are herbivores but lack the necessary enzymes to digest cellulose from plants. Part of the digestive tract of ruminants contains a microbial community that can break down cellulose. These microbes gain energy from the plant material, and byproducts of their metabolism provide the host with a source of Carbon and energy. What type of symbiosis does this relationship describe?arrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning