| A | B |
|---|
| ecosystem | A community of living organisms in conjunction with nonliving components of their environment interacting as a system. |
| abiotic | Non-living factors in the environment. |
| biotic | Produced by the action of living organisms. |
| watershed | The land area that supplies water to a river system. |
| wetland | An area of land that is covered with a shallow layer of water during some or all of the year. |
| divide | A ridge of land that separates one drainage basin or watershed from another. |
| tributary | A stream that flows into a larger stream. |
| river system | The process of grouping things based on their similarities. |
| eutrophication | Excess nutrients in a body of water often due to runoff that causes dense plant growth and death of animals due to lack of oxygen. |
| estuary | Surrounding wetlands are bodies of water usually found where rivers meet the sea. |
| water quality | The degree of purity of water, determined by measuring the substances in water, besides water molecules. |
| erosion | Action of surface process (such as water flow or wind) that remove soil, rock, or dissolved material from one location |
| flood plains | An area of low-lying ground adjacent to a river, formed mainly of river sediments and subject to flooding. |
| tidal | Of pertaining to, characterized, or subject to tides. |
| runoff | Draining away of water and substances from the surface of an area of land, a building or structure. |
| water pollution | The addition of any substance that has a negative effect on water or the living things that depend on the water. |
| groundwater | Water located beneath the ground surface in soil pore spaces and in fractures of rock formations. |
| migration | Seasonal movement of animals from one region to another. |
| nursery habitat | Habitat where juveniles of a species have greater level of productivity measured by density, survival, growth and movement. |
| pH | How acidic or basic a substance is, measured on a scale of 1 (very acidic) to 14 (very basic). |
| temperature | Multicellular organisms produce their own food from inorganic matter by photosynthesis, |
| salinity | Multicellular organisms with well-defined shape an limited growth, move voluntarily, actively acquire food, digest internally, and have sensory and nervous systems |
| turbidity | Invertebrate animal like hydra, jellyfish, sea anemone, or coral characterized by the specialized stinging structures in the tentacles surrounding the mouth |
| macro-invertebrate organisms | Invertebrate have shell of one or more pieces that enclose part or whole of soft, unsegmented body like chitons, snails, bivalves, squids, octopuses. |
