Exam 24: Aquatic Ecosystems

In lakes and ponds, photosynthesis occurs primarily in the

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

Phytoplankton thrive in the limnetic zone of lakes and ponds.

Decomposition in lakes and ponds occurs primarily in the benthic zone.

The community that colonizes submerged substrate (plants, rocks etc.), making them feel slimy, is known as

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

________ refers to the nutrient enrichment of aquatic ecosystems.

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

Coral reefs grow best where water is

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

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

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

In lakes and ponds, the ________ zone is a shallow water zone along the perimeter in which light reaches the bottom.

Oxygen concentrations are relatively high in the bottom ooze of lakes and ponds.

As a stream or river descends, it generally grows

Many zooplankton migrate to the surface to graze on phytoplankton during the day and retreat to deeper water during the night.

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

The organisms living on the bottom of the ocean are collectively referred to as

Swimming organisms in the ocean that are able to move at will in the water column are referred to as nekton.

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