Unit 3 – Chapter 3.1 – What is Ecology

What is Ecology?
-Ecology is the scientific study of interactions among organisms and between organisms and their physical environment.
-The biological influences on organisms are called biotic factors.
-Physical components of an ecosystem are called abiotic factors.–Modern ecologists use three methods in their work: observation, experimentation, and modeling. Each of these approaches relies on scientific methodology to guide inquiry
Biosphere
consists of all life on Earth and all parts of the world in which life exists
Ecology
the study of organisms interactions in their environment
Species
group of similar organisms that can breed and produce fertile offspring
Population
group of individuals belonging to the same species living in the same area
Community
an assemblage of different populations that live together in a defined area
Ecosystem
all organisms that live in a place together with their physical environment
Biome
group of ecosystems sharing similar climates and typical organisms
Biotic Factor
any living part of the environment with which an organism may interact
Abiotic Factor
any nonliving part of the environment with which an organism may interact
Levels of Organization
1. Species
2. Population
3. Community
4. Ecosystem
5. Biome
6. Biosphere
What is ecology??
Ecology is the scientific study of interactions among organisms and between organisms and their physical environment.
What are biotic and abiotic factors?
-The biological influences on organisms are called biotic factors.
-Physical components of an ecosystem are called abiotic factors.
What methods are used in ecological studies?
Regardless of their tools, modern ecologists use three methods in their work: observation, experimentation, and modeling. Each of these approaches relies on scientific methodology to guide inquiry.