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A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake ... The water in a river is usually confined to a channel, made up of a stream .... river gradients) or in which a particular hard lithology causes a river to have a ... There are several systems of classification based on biotic conditions ...


The ecosystem of a river is the river viewed as a system operating in its natural environment, ... The following unifying characteristics make the ecology of running waters unique .... Up to 90% of invertebrates in some lotic systems are insects.


Anatomy of A River. No matter how different our rivers are, however, all rivers share some basic anatomy features. American Rivers What parts make up a river ?


tributaries, the main river, and the main body of water that it flows into.


This diagram shows some common characteristics of a river system. Every river is different, however, so not all rivers may look exactly like this illustration.


A river is different from a lake because water is moving down a river. ... clams, and insect larvae are some organisms that make up the first order consumers.


Mar 14, 2011 ... Together, a river and its tributaries make up a river system. A river system is also called a drainage basin or watershed. A river's watershed ...


Mar 19, 2014 ... The ecology of the river refers to the relationships that living ... Oxygen is the most important chemical constituent of river systems – most organisms need it for survival. ... They are one of the species that make up whitebait.


As the water flows down, it may pick up more water from other small streams, ... Rivers and streams connect with each other in a system called a watershed. ... Although river water makes up only about 0.2 percent of all the fresh water on Earth, ...