List everything that could impact the growth of this flower Make a new Flashback Sheet

Lab isolation? Or natural habitat? How do we Study life? Lab isolation? Or natural habitat? If ecologists want to study something, such as a single plant, how do they do it?

Ecology is the study of how organisms interact with each other and with their environments

Life can be organized into different levels or ranks called hierarchy.

Biosphere all life on Earth

Limiting Factors in an Ecosystem In order to survive, organisms must interact with living and nonliving parts of their ecosystem. Limiting Factor: factors in an environment that can lower the population growth

Abiotic Factors Biotic Factors Nonliving things in an ecosystem (may be chemical or physical) All of the living components of an ecosystem. Bacteria Fungi Plants Animals Water Soil nutrients N2 Temperature O2 Sunlight Salinity Weather pH Fire How can these factors impact a population?

Limiting Factors in an Ecosystem In order to survive, organisms must interact with living and nonliving parts of their ecosystem. What are the 4 things that are essential for populations? Limiting Factor: factors in an environment that can lower the population growth

Populations Populations can be described based on their size, density, or distribution.

Population Density measures the number of individual organisms living in a defined space.

Carrying Capacity: The number of species that can live in the same environment over long periods of time

What kinds of factors can impact a population? Animals that can’t adapt to a change in a limiting factor will either die, or migrate somewhere else. Food Water Shelter What kinds of factors can impact a population? Space

Density-dependent factors These factors depend on the density of the population Examples: disease, predation, competition for food, water, shelter, space Occurs in large populations Triggered by increases of population

Density-independent factors These factors will occur regardless of population size Examples: weather changes human pollution natural disasters