Parasitism

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Parasitism:

Back 1

“a condition in which 2 organisms live together but one derives its
nourishment at the expense of the other”

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Microparasites

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--small size, short generation time
--develop and multiply rapidly
--may result in disease
--tend to induce immunity to reinfection in host that survives initial infection
--transmission is usually direct, but may involve vectors or carriers
--one host usually supports several species
--moderate to high ability to regulate populations

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Macroparasites

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--relatively large in size, longer generation time
--do not always complete life cycle in one host
--transmission may be direct from host to host
or indirect transmission involving intermediate hosts or carriers
--one host supports a few to many individuals of different species
--usually low ability to regulate host populations

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hemiparasite

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--photosynthetic, but
draw water and nutrients
from their host
--requires a vector..birds
who deposit seeds

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holoparasite

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--lack chlorophyll
--draw water, nutrients, and
carbon from their host

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Mutualism

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--- a relationship between 2 species that benefits both (+, +)

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Commensalism

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--- a relationship between 2 species in which one species benefits and the other is neither benefited or harmed (+, 0)