Exam 24: Aquatic Ecosystems

Invertebrates that feed on coarse particulate organic matter (CPOM),such as leaves that fall into streams and rivers,are referred to as

A(n)________ is a ring of coral reefs and islands surrounding a lagoon that is formed when a volcanic mountain subsides beneath the surface.

Coral reefs occur in nutrient-poor areas of the ocean.

In ponds and lakes,the zone beneath the depth of effective light penetration but above the bottom is referred to as the

Many physical features dictate life in an estuary.The physical feature with the most influence on organismal distribution is

Smaller than diatoms,the ________,which include tiny cyanobacteria,haptophtyes,and coccolithophores,make up the largest biomass in temperate and tropical water.

Most estuarine organisms are benthic.

Dead zones typically are

In lakes and ponds,decomposition occurs primarily in the

Non-flowing water ecosystems,such as ponds and lakes,are also called ________ ecosystems.

Invertebrates that feed on the algal coating of stones and rubble in streams and rivers are referred to as ________.

In lakes and ponds,phytoplankton and zooplankton are most abundant in the

Coral reefs grow best where water is

Because the thermocline is permanent in tropical oceans,little vertical mixing occurs,resulting in low productivity.

Because of the high pressure and cold temperatures,few species of organisms survive in the deep benthic zone of the ocean.

The deepest water of an ocean in deep-sea trenches and canyons is referred to as the hadalpelagic zone.

Which of the following bodies of water best represents a lotic ecosystem?

In hydrothermal vent communities,autotrophic organisms obtain energy by oxidizing

Reef-building corals have a symbiotic relationship with algal cells called ________ that live within the cells of corals.

Flowing-water ecosystems often alternate two different but related habitats: the turbulent ________ and the quiet pool.