Abiotic and Biotic Factors and Biodiversity

Abiotic factors that characterize a forest ecosystem include

• light and biodiversity

• temperature and amount of available water

• types of producers and decomposers

• pH and number of heterotrophs

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism

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What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

• commensalism
• mutualism
• parasitism
• predation

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Red-billed oxpeckers are birds that often feed on parasites that infest impala.  This is an example of _______.

• commensalism
• mutualism
• neutralism
• competition

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Aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants.

• Predation

• Parasitism

• Commensalism

• Mutualism

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If an area has all the wolves that it can support, the wolf population has reached its _______________________.

• limiting factor
• carrying capacity
• emmigration
• immigration

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A drought has hit this grassland biome. How will this effect the rabbit population?

• The rabbits will increase in number.
• The rabbit population will stay the same.
• The rabbit population will decrease.
• The rabbit population will become extinct immediately.

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All living and nonliving things in an environment and the many ways they interact are called ______

• ecosystem
• community

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The struggle between organisms to survive as they attempt to use the same resource

• Predator
• Prey
• Competition
• Adaptation

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On a safari at night, a lion hunts and feeds on an antelope. In this relationship, the lion is the ____________________ and the antelope is the _________________.

• Parasite/host
• Predator/prey
• Prey/Predator

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