4 BiosphereLife is found in a very narrow layer on the earth, called the biosphere.
5 The biosphere, like the human body, is made up of systems that interact and are dependent on each other.
6 The biosphere’s systems are called BIOMES and biomes are made up of ECOSYSTEMS. All ecosystems must have a constant source of energy (usually the sun) and cycles or systems to reuse raw materials.Examples are the water, nitrogen and carbon cycles.
7 An ecosystem is made up of all the biotic (or living) and the abiotic (or non-living) components in a given area.
8 Abiotic Factors Examples of abiotic factors are sunlight, The nonliving things in an environment are called ABIOTIC factors.Examples of abioticfactors are sunlight,temperature, rainfall,climate and soilconditions.
9 Biotic FactorsBiotic factors are all the living things or their materials that directly or indirectly affect an organism in its environment.
10 Biotic Factors also include parasitismdiseasepredation
11 We can think about the interactions and types of living things by organizing them into groups, smallest to largest.A species includes only one type of organism.Example:rabbit
12 A population includes all members of one species that live in the same area. Example: all the rabbits in Burlington
13 A community includes all of the different species that live in the same area. Example: all the rabbits, ants, maple trees, dogs, etc. that live in Burlington
14 An ecosystem includes both the community and the abiotic factors. Example: the Burlington community plus the cars, buildings, rocks, air…
16 The organisms in a habitat can be organized in the following way… ecosystemcommunityspeciespopulationClick for labels to appear in order from species to ecosystem. Prompt students to predict how this diagram will help them remember the order.16
17 Heterotrophs vs Autotrophs Or, in other words, Consumers vs Producers
18 AutotrophsA group of organisms that can use the energy in sunlight to convert water and carbon dioxide into glucose (food)Autotrophs are also called producers because they produce all of the foodWithout autotrophs, there would be no life on this planet
34 Factors that affect population growth Limiting factor - any biotic or abiotic factor that restricts the existence of organisms in a specific environment.EX. - Amount of waterAmount of foodTemperaturePredation34
38 Factors that affect population growth Carrying Capacity - the maximum population size that can be supported by the available resourcesThere can only be as many organisms as the environmental resources can supportAlthough several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.38