SPAWN

To produce or deposit eggs, as those of aquatic animals.

SPECIAL POWER PRODUCT

(SPP) A consumer option offered by an energy supplier distinct from the standard offering. The electricity associated with SPPs is often derived from renewable or other low-carbon energy sources, demonstrated by energy attribute certificates or other contracts.

SPECIAL WASTE

Items such as household hazardous waste, bulky wastes (refrigerators, pieces of furniture, etc.) tires, and used oil.

SPECIES

Populations of organisms that may interbreed and produce fertile offspring having similar structure, habits, and functions.

SPECIES ABUNDANCE

A measure of the absolute number of a particular species in an area.

SPECIES DIVERSITY

An ecological concept that incorporates both the number of species in a particular sampling area and the evenness with which individuals are distributed among the various species.