The range of environmental conditions that are tolerable for survival in a species.

The maximum temperature a species can withstand.

The minimum amount of food required for a species to survive.

The geographical area where a species can be found.

Study of living organisms in their nonliving world.

Study of chemical processes in living organisms.

Study of the interactions between different species.

Study of the physical environment without living organisms.

A group of populations interacting together.

A collection of unrelated species living in the same area.

A single species living in a specific habitat.

An ecosystem consisting of both biotic and abiotic factors.

A group of individuals of the same species.

A collection of different species in an area.

The total number of organisms in a habitat.

A random sample of individuals from a species.

The total number of species in an ecosystem.

The number of how many individuals are present for each species.

The average size of individuals in a species.

The diversity of species in a given area.

The symbiotic relationship between two species.

The preying of one animal on others.

The process of plants making their own food.

The migration of animals to find food.

A species that has no significant impact on its ecosystem.

A dominant predator whose removal allows a prey population to explode and often decreases overall diversity.

A species that is the most abundant in an ecosystem.

A species that is only found in a specific habitat.

Low levels of salinity, typically found in freshwater lakes.

High levels of salinity, commonly found in oceans.

Medium levels of salinity. Often occurs in wetlands where salt and fresh water mix.

No salinity, found in pure freshwater sources.

The many and varied benefits to humans gifted by the natural environment and from healthy ecosystems.

A type of service provided by urban areas to enhance human living conditions.

The process of converting natural resources into economic goods.

A method of conserving biodiversity through human intervention.

The total number of organisms in a community.

The number of different species in a community.

The variety of ecosystems in a region.

The genetic diversity within a species.

Community change that occurs with new land formation: lichen 🡪 moss 🡪 small shrubs 🡪 small trees 🡪 large trees 🡪 climax community.

Community change that occurs in established ecosystems: grass 🡪 shrubs 🡪 small trees 🡪 large trees.

Community change that occurs after a forest fire: large trees 🡪 small trees 🡪 shrubs 🡪 grass.

Community change that occurs in aquatic environments: algae 🡪 small fish 🡪 large fish.

A type of ecosystem with no biodiversity.

A transitional zone between two communities. Ex: intertidal zone.

A zone with only one type of species.

A permanent habitat for wildlife.

Another name for earth.

A layer of the atmosphere.

The study of living organisms.

A type of ecosystem.

Using no oxygen.

Using minimal oxygen.

Using only carbon dioxide.

Using high levels of oxygen.

A symbiotic relationship of a fungus and an algae.

A type of moss found in wet environments.

A form of bacteria that grows on rocks.

A flowering plant that thrives in deserts.

Level of salt in the water.

Amount of sugar in the water.

Temperature of the water.

Presence of pollutants in the water.

Sprouting of a seed.

The process of photosynthesis.

The stage of plant maturity.

The decay of organic matter.

Species with the same niche in the same area cannot coexist.

Different species can share the same niche without competition.

Species with overlapping niches will thrive together.

Niche differentiation allows for coexistence of similar species.

A measure of human impact on Earth's ecosystems, typically measured in area of wilderness or amount of natural capital consumed each year.

A method to calculate the total number of species in an ecosystem.

A measure of the biodiversity in a given area.

A technique used to assess the quality of air and water in urban environments.