interspecific interavtion

- The table on the far left categorizes two different types of interspecific interactions. - Review: In predation, an organism (usually an animal) obtains most of its food by eating other animals. - Predation is classified as a +/- interactionbecause the predator benefits and the prey is harmed (eaten). - In parasitism, a form of predation, one organism (the parasite) feeds on another (the host) without killing it immediately (if ever). Parasites are generally specific to particular host species. Acting as a parasite, the female mosquito sucks blood to nourish eggs in her abdomen.

- an association between two or more species that benefits the organisms involved. - Invertebrate animals called polyps live symbiotically with zooxanthelae. The skeletons of the polyp form what is known as “coral.” If the water temperature is high (global warming), the polyp will release the zooxanthelae, thereby disturbing the vitality of the coral reef ecosystem.

- one species benefits and the other is apparently not affected. Whether or not one of the species is completely unaffected is still debated. - While the herd of cattle grazes, they inadvertently flush insects from the vegetation, and the cattle egrets eat these insects. - Question: Is this truly a commensalistic relationship? Community ecology seeks information about these and other interspecific interactions.

Which of the following statements about parasites is not true?

- Parasitism can be described as a +/0 interspecific interaction.

To what does “coral bleaching” refer?

- when symbiotic microalgae are expelled from the coral polyp

14.6.3 Interspecific Associations: Symbiosis Flashcards by Irina Soloshenko

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14.6.3 Interspecific Associations: Symbiosis Flashcards

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