Species Movement- Biological dispersal refers to both the movement of individuals (animals, plants, fungi, bacteria, etc.) from their birth site to their breeding site ('natal dispersal'), as well as the movement from one breeding site to another ('breeding dispersal').

Ecological Succession- The environmental movement, also including conservation and green politics, is a diverse scientific, social, and political movement for addressing environmental issues.

Cell respiration- is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.
Food webs- is a linear network of links in a food web starting from producer organisms and ending at apex predator species, detritivores, or decomposer species. A food chain also shows how the organisms are related with each other by the food they eat. Each level of a food chain represents a different trophic level.
Trophic Levels- each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy.
Ecological Pyramids- is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass pyramids show how much biomass is present in the organisms at each trophic level, while productivity pyramids show the procreation or turnover in biomass. 

Major terrestrial Biomes- Tundra Rainforest, Savanna, Taiga, Temperate forest, Temperate grassland, Alpine, Chaparral.

Aquatic Biomes- Ponds and lakes, Streams and rivers Wetlands, Oceans Coral reefs, Estuaries.

Ecological Niches- a niche is the fit of a species living under specific environmental conditions. The ecological niche describes how an organism or population responds to the distribution of resources and competitors and how it in turn alters those same factors.

Species Interactions-The interaction among organisms within or between overlapping niches can be characterized into five types of relationships: competition, predation, commensalism, mutualism and parasitism.