| A | B |
|---|
| macrofauna | Large animals; extremely visible. |
| management | In general terms related to wildlife, the intentional manipulation or non-manipulation of habitat and/or the organisms within the habitat. |
| manipulate | Manage or influence to achieve desired results. |
| map | A drawing of land or physical features. Maps are useful to find streams and access points to rivers and lakes. |
| marine deposits | Sediment deposited in oceans. |
| marl | A type of bottom under a body of water; a mixture of clay and carbonate of lime. |
| marsh | A wetland without trees which often has standing water. |
| meandering | Curving; often used to describe rivers and streams in lowlands. |
| microclimate | A “small climate;” the environmental conditions within a restricted area |
| microfauna | Very small animals, barely visible to the eye. |
| microhabitat | A small habitat within a larger one in which environmental conditions differ from those in the surrounding area. A hole in a tree trunk or a decaying log is a mircohabitat within the forest. |
| microorganism | An organism microscopic in size, observable only through a microscope |
| migration | The movement of animals—including fish—from one area to another. |
| mitigate | To make up for; to substitute some benefit for losses incurred. |
| Montane zone | The band of vegetation that occurs at intermediate elevations in mountainous regions between foothills and subalpine zones |
| mortality rate | The death rate—usually expressed in deaths per thousand |
| mottled | A variegated pattern of color. |
| mucus | In fish, a slimy substance that coats the skin and helps protect fish from infection and disease. Also helps them move through the water. |
| nitrogen-fixation | Conversion of elemental nitrogen from the atmosphere to organic combinations or to forms readily usable in biological processes |
| nocturnal | Active by night; the opposite of diurnal. |
