ESS topic 2.1

An interaction between two species where both benefit from the relationship. (2.1.9)

• parasitism

• mutualism

• Lincoln index

• salinity

An interaction where one organism (predator) kills and eats another (prey). (2.1.9)

• predation

• transect sampling

• K-strategist

• habitat

A group of interacting populations of different species living in the same area. (2.1.18)

The functional and genetic diversity of Earth's ecological systems. (2.1.24)

• percentage frequency

• percentage cover

• biosphere integrity

Non-living physical and chemical components of an environment that affect living organisms. (2.1.6)

• dichotomous key

• abiotic factor

• carrying capacity

A technique or sampling method for studying organism distribution along a line across an environmental gradient.

Interaction between organisms vying for the same limited resources in an ecosystem. (2.1.9)

• mutualism

• parasitism

• competition

The natural environment where an organism lives and grows. (2.1.19)

A threshold beyond which an ecosystem experiences rapid, often irreversible changes. (2.1.22)

A method for estimating population size using capture-mark-recapture data. (2.1.17)

• random sampling

• Lincoln index

• dichotomous key

• DNA survey