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16 Cards in this Set
- Front
- Back
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Estuaries
a. Are ephemeral and therefore of no biological importance b. Are extremely important as nurseries for many species of fish c. Have salinities too low to support much marine life d. have relatively low primary production, so species must feed outside the estuary |
b. Are extremely important as nurseries for many species of fish
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Animals that cause sediments to shift, become re-suspended, or otherwise change are called_______.
a. bioturbators b. r-selected c. k-selected d. parallel bottom communities |
a. bioturbators
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Keystone Species
a. Are primary producers b. Are superior competitors and affect community structure c. Affect community structure by preying on competitively important prey species. d. Are found only in the intertidal zone |
c. Affect community structure by preying on competitively important prey species
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Benthic species in estuaries may be adapted to estuarine flow
a. By crawling with/in the sediment toward higher salinity b. By having planktonic larvae rise with the flooding tide and staying near the bottom on the falling tide c. By never living on the sediment surface d. By digging deeper than in open marine sediments |
b. By having planktonic larvae rise with the flooding tide and staying near the bottom on the falling tide
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On the rocky shore the competitively superior species will take over
a. Unless there is little larval recruitment of that species b. Under any circumstances c. Only if its predator is abundant d. Unless there is facilitation between individuals of that species |
a. Unless there is little larval recruitment of that species
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The creation of open bare patches in any area of the rocky intertidal zone results in the rapid colonization by the species that might be called:
a.opportunistic b. K-selected c. keystone d. deposit feeder |
a.opportunistic
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In an ecosystem, as the energy is passed from one trophic level to another, the amount of usable energy:
a.Increases b.Decreases c. Remains the same d. Is unpredictable |
b.Decreases
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An estuary is which of the following?
a. A coastal bay where freshwater and seawater mix b. A body of marine water c. A coastal bay of freshwater d. An inland body of very salty water e. A coastal bay with unusually salty water |
a. A coastal bay where freshwater and seawater mix
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In a year when rainfall is plentiful within the estuary, we might expect
a. Larval recruitment within the estuary to be at a low rate b. Salinity to be generally lower throughout the estuary c. Larger supplies of nutrients d. All the above |
d. All the above
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A member of the infauna that, by its presence in the sediments helps to hold the sediments in the place is called a___.
a. sediment stabilizer b.bioturbator c. parallel bottom community d. keystone predator |
a. sediment stabilizer
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Bio-luminescence can be used for
a. Counter-illumination b. Lures c. Deceptive signals d. All the above |
d. All the above
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Temperature in the deap-sea abyssal plain
a. Is the coldest on earth b. Is seasonally and spatially very stable c. Has about the same annual range as coastal mid-latitude shelf waters d. Is stable at about 15degrees C |
b. Is seasonally and spatially very stable
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Mangrove forests are an example of
a. An environment where little herbivory occurs b. An environment where the water flow is not an important factor c. An environment in which sea stars are a keystone predator d. A group of species that have adapted to warm, turbulent waters |
a. An environment where little herbivory occurs
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Vestimentiferans (the red tube worms found near hydrothermal vents) can live without a gut because
a.They live near sources of dissolved organic matter b. They are p[arasites living within the guts of bivalves c. They have symbiotic bacteria, which are the source of their nutrition d. They are protistans |
c. They have symbiotic bacteria, which are the source of their nutrition
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Vents and cold seeps depend on primary production generated by____.
a. chemo-synthetic bacteria b. heterotrophic bacteria c. photosynthetic bacteria d. photosynthetic algae c. chloroplast symbionts |
a. chemo-synthetic bacteria
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Which of the following is NOT necessary of a species to be a keystone species?
a. a high impact on the rest of the community b. consumption of the most other species in the community c. A small population size relative to some other species in the community |
b. consumption of the most other species in the community
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