Chapter 35 Interaction Among Living Things

Our Environment  Consists of all the living and nonliving things with which an organism may interact.  Web of Connections / Systems

Either One or the Other  Biotic Factors  All of the living Things in the environment  Abiotic Factors  All of the nonliving components

Environments include:  Individuals  Populations  Communities  Habitat  Niche

Example Individual: a bunny ( PJ )

Con’t. Population of bunnies (PJ’s family)

Con’t. Many populations of bunnies

A Community: Many Populations of Different Organisms

Con’t. A bunny’s habitat

Con’t. Their niche ( role in the environment )

Ecology vs. Ecosystem  Ecology:  The study of the relationships and interactions of living things with each other & their environment  Ecosystem:  Separate “units” of the living & nonliving things

Ecosystems ForestPond

Competition Living organisms compete for: Living organisms compete for: Food Food Space Space Mates Mates

Relationships PredatorPrey

Energy flow within in Ecosystem 1. Producers

Energy Flow 2.1 Consumers –Carnivore ( meat eater )

Energy Flow 2.2 Consumers –Herbivore ( plant eater )

Energy Flow 2.3 Consumers –Omnivore : eat both plant & meat

Energy Flow 3 Decomposers ( return the nutrients )

Energy Cycles Food Chains & Food Webs

Energy in the Ecosystem The sun is the primary source of energy

Symbiosis ( relationships ) Commensalism : One organism benefits & the other is not affected by the relationship

Symbiosis Mutualism: Both organisms benefit from the relationship

Symbiosis Parasitism: One organism benefits and the other will be harmed

Factors that influence Ecosystems Climate ( temp / moisture ) Climate ( temp / moisture ) Geography Geography New species New species Humans Humans Natural forces Natural forces Fire / erosion / floodsFire / erosion / floods

So in the end… Keep our environment clean & healthy Keep our environment clean & healthy PJ thanks you PJ thanks you