| TERMS | |
| DEFINITIONS | |
| Community | Community is composed of all populations living in an area. |
| Dominant specie | Species that determine community characteristics are
called dominant species. |
| Succession | The process of change a community in a predictable ways is called succession. |
| Ecological niche | All the- attributes of lifestyle of an animal is called
ecological niche., |
| Pioneer community | The first community establish in an area is called the
pioneer community. |
| Sere | The entire successional sequence is called sere. |
| Ecosystem | Communities and their physical environment are called ecosystems. The sequence of organisms through which energy moves in an ecosystem is called food chain. |
| Food chain | |
| Food web | Complexly interconnected food chains are called food |
| Limnetic zone | The open water area where enough light can penetrate is called limnetic zone. |
| Stream and rivers | The fresh water bodies in which water moves Continuously |
| in one direction are called streams and rivers. | ||
| Photic zone | The open water of ocean where light can penetrate is called photic zone. | |
| Aphotic zone | The zone below the aphotic zone where light cannot penetrate is called a aphotic zone. | |
| Benthic zone | The open water at the seafloor is called benthic zone. | |
| Estuary | The area where a freshwater stream or river merges with the ocean is called an estuary. | |
| Prairies | The grass land without woody trees is called prairies. | |
| Savanna | The grassland with scattered. woody trees is called | |
| Tundra | The treeless region on the high attitude or latitude is called tundra. | |
| Pollution | Any detrimental change in an ecosystem is called | |
| Biological magnification | The accumulation of matter in food webs is called
biological magnification. |
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