Ecology

Levels of Organization Figure 3-2 Ecological Levels of Organization Levels of Organization Section 3-1 Go to Section:

Percent of Living Organisms Species Diversity Percent of Living Organisms Section 6-3 Insects 54.4% Protists Other Animals 4.2% 19.7% Plants 18% Bacteria Fungi 0.3% 3.4% Go to Section:

Interest Grabber Fitting In Section 4-2 Organisms not only live together in ecological communities, but they also constantly interact with one another. These interactions, which include predation and competition, help shape the ecosystem in which they live. 1. Based on your own experiences, define predation. Give one example of predation. 2. Based on your own experiences, define competition. Give one example of competition. Go to Section:

Abiotic and Biotic Factors Section 4-2 Abiotic Factors Biotic Factors ECOSYSTEM Go to Section:

Habitat vs. Niche Habitat- place where an organism lives Niche- the use of its habitat and its function/ role in the community

Niche Fundamental niche- the entire range where an organism could survive. Realized niche- actual area in a community that an organism occupies due to competition.

Figure 4-5 Three Species of Warblers and Their Niches Section 4-2 Cape May Warbler Feeds at the tips of branches near the top of the tree Bay-Breasted Warbler Feeds in the middle part of the tree Yellow-Rumped Warbler Feeds in the lower part of the tree and at the bases of the middle branches Spruce tree Go to Section:

Food Web Section 3-2 Go to Section:

Ecological Pyramids Section 3-2 Energy Pyramid Shows the relative amount of energy available at each trophic level. Organisms use about 10 percent of this energy for life processes. The rest is lost as heat. Pyramid of Numbers Shows the relative number of individual organisms at each trophic level. Biomass Pyramid Represents the amount of living organic matter at each trophic level. Typically, the greatest biomass is at the base of the pyramid. Go to Section: Go to Section:

Movement of toxin through a food chain. Increases 10x/level Biomagnification Movement of toxin through a food chain. Increases 10x/level

Figure 6-16 Biological Magnification of DDT Section 6-3 Magnification of DDT Concentration Fish-Eating Birds 10,000,000 Large Fish 1,000,000 100,000 Small Fish 10,000 Zooplankton 1000 Producers Water 1 Go to Section:

Water Cycle

Carbon Cycle Figure 3-13 The Carbon Cycle Section 3-3 CO2 in Atmosphere CO2 in Ocean Go to Section:

Nitrogen Cycle NO3- and NO2- NH4+ Section 3-3 Go to Section: N2 in Atmosphere NO3- and NO2- NH4+ Go to Section:

Nitrogen Cycle

Phosphorus Cycle