Factors Affecting Biodiversity and Populations Within Ecosystems

All the organisms of the same species that live in the same area are called a ______.

• Group
• Population
• Herd
• Cluster

A factor or factors that can affect species distribution is/are ____.

• Predation
• Disease
• Competition
• All of the above

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Salt water is an abundant resource but unusable for irrigation and drinking. As demands on freshwater sources increase, the use of desalination processes to remove salt from ocean water is increasing. A concern of desalinating water is the large amounts of recovered salts that are returned to the ocean. Which of the following describes the most likely impact of desalination on the surrounding ocean environment? 

• Methane gas would pollute the ocean environment as shoreline organisms begin to die and decay.
• Alteration in ocean salt levels would cause loss of species and unbalanced populations in marine food webs.
• Nonrenewable resources in the ocean environment would become depleted and upset the ecosystem's balance.
• Increased levels of salts and minerals in the ocean would result in overpopulation of marine bivalves due to strengthened shells

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the variety of life in the world or in a particular habitat or ecosystem

• biodiversity

• demography

• carrying capacity

• poaching

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Why is biodiversity important to ecosystems?

• It helps populations adapt to ecological changes.

• It increases at each level of the food chain.

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Currently sharks are on a rapid decline due to overfishing. If sharks go extinct will this affect the biodiversity of the ocean?

• No, sharks are not important.
• No, sharks will only affect the seal populations.
• Yes, it will disrupt the entire food chain in the ocean.
• Yes, but only a little.

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An abiotic factor is:

• Living

• Non-living

• Neither

An biotic factor is:

• Living

• Non-living

• Neither

What type of factor is this?

• Biotic

• Abiotic

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What type of factor is this?

• Biotic

• Abiotic

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