Freshwater Ecology (Unit2) Aqua Sci

There will be MORE runoff in an urban area than in a natural area such as a forest.

• True

• False

Which of the following can be used as indicator organisms (can be used as indicators of water pollution.)

• microvertebrates

• chlorine and carbon dioxide test strips

• macroinvertebrates and freshwater fish

• lions and tigers and bears

Aquifers, swamps, rivers and marshes are all examples of:

• brackish water

• lentic systems

• freshwater habitats

• marine ecosystems

This type of lake has moderate productivity. The water is fairly clear and has little nutrients.

• oligotrophic

• hypereutrophic

• eutrophic

• mesotrophic

Which of the following is NOT an example of a lentic system?

• marsh

• lake

• river

• pond

Which of the following is a reason why freshwater macroinvertebrates are used as indicator species?

• They are found in all aquatic habitats.

• They are often diffulcult to collect.

• None are capable of tolerating pollution.

• Often live for less than one week.

A method/tool that scientists use for determining the identity of an organism (like the name of a butterfly, a plant, a lichen, or a rock) by going through a series of choices that lead the user to the correct name of the organism. (literally means “divided into two parts”)

• macroinvertebrate identifier

• indicator species key

• dichotomous key

• dos key

An area of land that drains all the streams and rainfall to a common outlet such as the outflow of a reservoir, mouth of a bay, or any point along a stream channel.

• watershed

• water basin

• mountain valley

• drainage plain

What is an indicator species?

• environmental indicators that offer a signal of the biological condition in a watershed

• any animal with a backbone and large enough to see without the aid of a microscope

• plants that have adapted to living in aquatic environments (saltwater or freshwater)

• microscopic, single-celled organisms that thrive in diverse environment

Tags

NGSS.MS-LS2-4

Which is a better indication of the water quality, the number of organisms (for example 12 crayfish are found at one site) or the type of organisms (water penny larvae are found with lots of lunged snails and leeches) found at a site?

• number of organisms

• the type

• neither are important