Lesson Overview Section 3.1, 3.2 & 3.3 Ecology scientific study of interactions among and between organisms and their physical environment. Biosphere This consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere. 8km above 11km below
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Lesson OverviewSection 3.1, 3.2 & 3.3
Ecology
scientific study of interactions among and between organisms and their
physical environment.
BiosphereThis consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere.
8km above
11km below
The Science of Ecology
Interactions within the biosphere produce a web of interdependence between organisms and the environments in which they live.
Levels of Organization
Individual
Population
Biosphere
Community
BiomeTemperate
ForestEcosystemGroup of ecosystems-same climate/dominant communitiesAll living organisms & non-living
parts of the environment
Group of individuals that belong to the same species
Different populations in the same area
SpeciesGroup of individuals that are able to breed & produce fertile offspring
Parts of the Environment (Biotic & Abiotic Factors)A biotic factor is any living part of the environment with which an organism might interact, including animals, plants, mushrooms and bacteria.
An abiotic factor is any nonliving part of the environment, such as sunlight, heat, precipitation, humidity, wind or water currents, soil type, etc.
A dynamic mix of biotic and abiotic factors shapes every environment
Primary Producers (autotrophs)Organisms that can capture energy from sunlight or chemicals and convert it into forms that living cells can use. They make this energy available to other organisms that eat them.
Energy, Producers & Consumers
ConsumersOrganisms that must acquire energy from other organisms by ingesting in some way are known as heterotrophs (consumers).
Types of Consumers:
Carnivores, kill and eat other animals
Scavengers, animals that consume the carcasses of other animals
Decomposers, feed by chemically breaking down organic matter, producing detritus—small pieces of dead and decaying plant and animals.
Herbivores, obtain energy and nutrients by eating plant leaves, roots, seeds, or fruits
Omnivores, have diets naturally include a variety of different foods that usually include both plants and animals.
Detritivores, commonly digest decomposers that live on, and in, detritus (non-living, particulate organic matter).