Exam 24: Aquatic Ecosystems

When rivers flow into the ocean,they create a zone that mixes freshwater with saltwater referred to as a(n)________.

A relatively ________ lake is characterized by an abundance of nutrients,abundant algal growth,and shallow light penetration.

In rivers and streams,the invertebrates that scrape algae off rocks are referred to as shredders.

In the profundal zone of a lake or pond,the rate of photosynthesis exceeds the rate of respiration.

In streams and rivers,decomposition occurs primarily in

Bioluminescence reaches its greatest development in the mesopelagic zone of an ocean.

Classification of aquatic ecosystems is largely based on features of the ________ environment.

Semi-enclosed areas of the coastal ocean where seawater is diluted and partially mixed with freshwater coming from the land are referred to as

Which of the following feeds on FPOM?

Lakes that receive large amounts of organic matter from surrounding land,particularly in the form of humic materials that stain the water brown,are called ________ lakes.

Shredders,collectors,and small predatory fish such as sculpins,darters,and trout are the dominant organisms collectively found in

The organisms responsible for the majority of primary production in marine environments are the copepods.

Unlike phytoplankton,which are at the mercy of currents,zooplankton can move at will within a current.

________ are mountainous lakes that have been carved by glacial erosion and deposition.

Non-flowing water bodies,such as lakes,are referred to as lotic ecosystems.

What is a riffle?

The benthic community of an ocean,with the exception of hydrothermal vents,is best described as

Photosynthesis in the ocean takes place mostly in the mesopelagic zone.