Levels of Organization & Relationships (2.1) State Standard SB4A. Investigate the relationships among organisms, populations, communities, ecosystems, and biomes.

Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships Ecology Scientific discipline in which the ________________ among living organisms and the interaction the organisms have with their _______________ are studied. Ecologists ______________, _____________, and ____________ using a variety of tools and methods.

A ______________ layer around Earth. Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships The Biosphere A ______________ layer around Earth. Extends several kilometers ______________ the Earth’s surface. Extends several kilometers _______________ the ocean’s surface. The term biosphere includes all organisms and the environments in which they live (___________ and ___________ factors).

Biotic Factors Abiotic Factors Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships Biotic Factors _______________ factors in an organism’s environment. Abiotic Factors ________________ factors in an organism’s environment. Organisms ____________ to survive in the abiotic factors present in their _____________ environment.

Levels of Organization Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships Levels of Organization Levels _______ in complexity as the _________ and ___________ between organisms increase. Organism - Individuals Population - includes all the ____________ in the same species in a given area. Community - a collection of __________ that interact with each other in a given area. Ecosystem - includes all biotic and abiotic __________in a given area. Biome – A group of ____________in the same region having similar types of vegetation governed by similar climate conditions. Biosphere – all organisms and the ______________ in which they live.

Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships The ______________ level of organization is the individual organism itself. Organisms of a single species that share the same geographic location at the same time make up a ____________. A _______________ is a group of interacting populations that occupy the same geographic area at the same time.

Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships An ___________is a biological community and all of the abiotic factors that affect it. A __________ is a large group of ecosystems that share the same climate and have similar types of communities.

Ecosystem Interactions Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships Ecosystem Interactions A ____________ is an area where an organism lives. A ____________ is the role or position that an organism has in its environment.

Community Interactions Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships Community Interactions Competition Occurs when more than one organism uses a resource at the __________ time ____________ Many species get their food by eating other organisms.

Symbiotic Relationships Chapter 2 Principles of Ecology 2.1 Organisms and Their Relationships Symbiotic Relationships The close relationship that exists when two or more species live together _______________ - ________ organisms benefit _______________ - One benefits while the other is ____________ _______________ - One benefits while the other is ____________

Clown Fish & Sea Anemone Bee & Flowering Plant Mutualism

Bristle Worm Hermit Crab Commensalism

Wasp Larvae & Tomato Hornworm Tick & Human Parasitism