Biomes: Global Patterns of Life Biomes Major types of ecosystems that cover large geographic areas. Often characterized by a pattern of similar vegetation. Which is characterized by climate and other abiotic factors Temperature and precipitation ar
Understanding Our Environment Why Study Environmental Science?
Humans inhabit the natural world. Our study of humans has always included the social aspects of humans, as well. We are part of nature
We influence it It influences us
A POPULATION is a group of individuals of the same species that occur together in space and time. When we discuss populations, there are a number of population characteristics of interest.
Overshoot - Measure of extent to which population exceeds carrying capacity of its environment. Dieback - Negative growth curve.
Severity of dieback generally related to the extent of overshoot.
So, just wh
Biomes - 1 TUNDRA Biome of the extreme north Some seasonal snow melt Terrain, hummocks Long, harsh winters, very short summers Short growing season Long summer day-length Little precipitation 4-10 inches/year, mostly in summer Poor soil PERMAFROST W
The human population is no different from any other population when it comes to measuring population change. We still look at birth rates, death rates, and immigration rates and emigration rates.
Population Growth Rates
A few examples from regions a
Water Use and Management WATER RESOURCES
Hydrologic Cycle Describes the circulation of water as it:
Evaporates from land, water, and organisms. Enters the atmosphere. Condenses and precipitates back to the earth's surfaces. Moves underground or ove
BIODIVERSITY AND SPECIES Biodiversity Types: Genetic Diversity - Measures variety of different versions of same genes. Species Diversity - Measures number of different kinds of organisms within a community. Ecological Diversity - Measures richne
Air Pollution THE AIR AROUND US Approximately 147 million metric tons of air pollution are released annually into the atmosphere in the U.S. by human activities. Worldwide emissions total around 2 billion metric tons. Developed countries have been im
Frameworks for Understanding: Science, Systems, and Ethics WHAT IS SCIENCE? Science is: a methodical, logical process for producing knowledge about natural phenomena.
cumulative body of knowledge produced by scientists. on careful observation of t
Human population history A really brief overview of how we came to be where we are, and where we might be headed. POPULATION GROWTH Until the Middle Ages, human populations were held in check by diseases, famines and wars, and thus grew very slowly.
Water Pollution WATER POLLUTION Any physical, biological, or chemical change in water quality that adversely affects living organisms can be considered pollution. Point Sources - Discharge pollution from specific locations. -Factories, Power plants N
The loss of the last member of a species. Extinction is irreversible. Extinction leads to a biologically impoverished world. However, extinction is a naturally occurring process. Extinction is the ultimate fate of all species on Ear
Geology and Earth Resources A DYNAMIC PLANET
A Layered Sphere
Core - Interior composed of dense, intensely hot metal. Generates magnetic field enveloping the earth. Mantle - Hot, pliable layer surrounding the core. Less dense than core. Crust - Coo
Evolution, Biological Communities, and Species Interactions Definitions evolution - genetic changes within a population over time natural selection - differential reproductive success mutations - random changes o in DNA adaptation - genetic trait tha
Air, Weather, and Climate The Atmosphere We live in an ocean of air that is about 1,000 miles thick. Turbulent and mobile Winds, and Weather, and Climate. Past and Present Composition Many geochemists believe the earth's earliest atmosphere was made
Evolution, Biological Communities, and Species Interactions Interactions When to two or more different species are present they have the potential to interact We have seen how competition for resources, and predation, can be forces in evolution. Not
Keystone species- one in which its presence or absence is a good indicaton of the
Trophic levels-feeding status in relationship to food chain. Plants on bottom and then the
things that eat the plants. Rarely have more than 6 trophic levels
Matter, Energy, and Life Matter. To Cells
Cells - Minute compartments in a living organism which carry out process of life.
Surrounded by lipid membrane controlling flow of materials in and out of cell. Interior sub-divided into organelles and sub-a