Freshwater Ecosystems Quiz

Ponds, lakes, streams, rivers, and swamps.

Green algae, water lilies, and gnats.

Turtles, frogs, crayfish, birds, snakes, raccoons, plankton, and small fish.

They have streamlined bodies that help them swim against water currents, and some have hooks or claws to anchor themselves to rocks.

Estuaries are places where water from rivers flows into oceans or seas, and their water is less salty than ocean water but more salty than river water. They are important natural resources that support diverse plant and animal life, and many birds and animals breed there.

Estuarine plants and animals are adapted to live with changing salinity by evolving mechanisms to regulate their internal salt concentrations and tolerate fluctuations in external salinity.

Oceans play an important role in the water cycle by containing nutrients that support different forms of life and by contributing to the evaporation and precipitation processes that drive the global water cycle.

Factors that affect organisms living in different ocean zones include tides, temperature, salinity, water pressure, and sunlight availability.

The sun's rays near the surface of the ocean supply energy through photosynthesis, which supports the food chains and sustains the living creatures that use it.

The availability of sunlight gradually decreases with depth in the ocean and disappears at a depth of approximately 200 meters, leading to decreased energy input for photosynthesis.

Living creatures near the bottom of the ocean are called benthic organisms, including species like snakes and other bottom-dwelling organisms.

Deep-sea creatures, including some primitive species, play a crucial role in the ocean ecosystem by feeding on materials from the surface and contributing to the recycling of nutrients in the deep ocean environment.