| A | B |
| plankton | small organisms live in fresh and salt water |
| phytoplankton | unicellular algae, form base of many food webs. |
| zooplankton | algae that feed on zooplankton |
| wetland | ecosystem where fresh water covers soil or near surface of soil |
| estuary | type of wetland where river meet sea. has fresh/salt water plants. |
| detritus | organic material that i food for bottom of food web |
| salt marsh | temperate zone estuary, has many salt tolerant grasses |
| mangrove swamp | coastal wetland, near tropics |
| photic zone | area of ocean where photosynthesis occurs |
| aphotic zone | bottom area of ocean, dark, chemosynthesis occurs here |
| zonation | horizontal banding or organisms that live in a specific area |
| coastal ocean | water that extends from low tide to outer part of continental shelp |
| kelp forest | ocean community where giant brown algae are. |
| coral reef | contains coral animals |
| benthos | area of ocean that has organisms that live near bottom, ex. sea stars |