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45 Cards in this Set

  • Front
  • Back
​What is a population?
​A group of organisms of the same species occupying a specific area
​What is the largest marine community?
​between the photic zone and the deep bottom
Which distribution pattern is the rarest in nature?​
​uniform distribution
What is the study of the balance between environmental factors and organisms in a community?​
​ecology
What is environmental resistance?​
​The sum of the effects of the limiting factors on the environment
What is a niche?​
​An organism's occupation in a community
The grazing of phytoplankton by copepods would be an example of a(n) _____ influencing a community.​
​biological factor
Which area is most likely to have the most populous and diverse community of organisms?​
​intertidal zone
How much biomass in tropical coral reefs is attributed to the coral alone?​
​50%
What process reestablishes climax communities after a major disruption to the environment?​
​succession
What is a climax community?​
​A stable, long-established community
What is the most important physical environmental factor in intertidal communities?​
​rise and fall of tides
What community typically has the highest biomass per unit of surface area?​
​estuary
​Which area is most likely to contain brackish water?
​estuary
Which plankton are the most numerous primary consumers of the ocean?​
​zooplankton
​An animal that is tightly attached to rocks during intense wave activity is said to be ____.
​sessile
Copepods belong to which group?​
​zooplankton
What type of ocean does not support a deep scattering layer?​
​An arctic ocean
What can occur when intertidal organisms are exposed to air and sunlight?​
What can occur when intertidal organisms are exposed to air and sunlight?​
​What is considered the "keystone" species of the Antarctic ecosystem?
​krill
​What pelagic community lives in the uppermost limits of the permanent darkness in the deep ocean?
​deep scattering layer
What adaptation is commonly found in organisms of deep pelagic and benthic communities?​
​gigantism
Which hydrothermal vent organisms have no mouth, digestive tract, or anus?​
​tube worms
What is one of the important inorganic molecules used for energy production at hydrothermal vents?​
hydrogen sulfide
Which relationship is an example of mutualism?​
​anemone fish and sea anemone
What do most deep water consumers depend upon for survival?​
​The productivity of the water column above
​What is an example of symbiosis?
​commensalism
What has been suggested as a means for hydrothermal vent organisms to disperse over great distances between vent systems?​
​whale falls
What is the most widely distributed and successful parasitic marine animal?​
​nematoda
Where might a rare example of random distribution be found?​
​abyssal plains
If an environment is changed by disruption, a different climax community always establishes.​

True

The carrying capacity is the number of individuals an environment can support.​

True

Most tropical reefs form in areas with low wave energy so the force does not crush them.

False

​Black sand beaches are particularly difficult intertidal regions to survive because of their high temperatures.

True

​The most successful organisms in a community have the most surviving offspring.

True

Biodiversity refers to the many different habitats organisms live in.​

False

Zooplankton are autotrophic plankton and one of the main groups of primary producers.​

False

In a stable community, multiple populations can occupy the same "job" to ensure biodiversity.​

False

​The conditions of the deep ocean, such as eternal darkness, cold temperatures, hypersalinity, and high pressure, limits the extent of deep-ocean floor communities.

False

Marine communities evolve more rapidly than terrestrial communities.​

False

Many large intertidal plants must be slippery in addition to being strong and elastic to avoid being shredded by the intense wave energy of the intertidal.​

True

Salt marshes exhibit greater species diversity than estuarine marshes.​

False

​Hydrothermal vents are called "black smokers" because of the black water emitting from the vents due to the precipitation of inorganic sulfides.

True

​Hydrothermal vents are called "black smokers" because of the black water emitting from the vents due to the precipitation of inorganic sulfides.

True

More than half of the animal species, marine and terrestrial, are not considered to be free-living.​

True