Benchmark 5D
The Living Environment: Interdependence of Life
Grades 6-8, page 117

In all environments--freshwater, marine, forest, desert, grassland, mountain, and others--organisms with similar needs may compete with one another for resources, including food, space, water, air, and shelter. In any particular environment, the growth and survival of organisms depend on the physical conditions.

NSES Content Standard C 
Life Science: Organisms and their environments
Grades K-4, page 129
An organism's patterns of behavior are related to the nature of that organism's environment, including the kinds and numbers of other organisms present, the availability of food and resources, and the physical characteristics of the environment. When the environment changes, some plants and animals survive and reproduce, and others die or move to new locations.

NSES Content Standard F 
Science in Personal and Social Perspectives: Changes in environments
Grades K-4, page 140
Environments are the space, conditions, and factors that affect individual's and population's ability to survive and their quality of life.

NSES Content Standard C
Life Science: Populations and ecosystems
Grades 5-8, page 158
The number of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition. Given adequate biotic and abiotic resources and no disease or predators, populations (including humans) increase at rapid rates. Lack of resources and other factors, such as predation and climate, limit the growth of populations in specific niches in the ecosystem.

NSES Content Standard C 
Life Science: The interdependence of organisms
Grades 9-12, page 186
Living organisms have the capacity to produce populations of infinite size, but environments and resources are finite. This fundamental tension has profound effects on the interactions between organisms.