Biodiversity The word in another language Definition Root of the word: Bio = life Diversity = Latin diversitatem meaning difference ILLUSTRATE Use in a sentence
How do humans affect the populations of species?
Humans have played a large role in the loss of Biodiversity on the planet. Biodiversity = the variety of life in an area
Human Impact on the Environment 1. Effects of Human Overpopulation: loss of land/habitat water and food shortage poor sanitation species extinction poverty emerging disease
2. Deforestation loss of forests Results in: - soil erosion - loss of habitat - species extinction Worldwide, about half of the area covered by forests has been cleared.
Work with your group to write 2 questions about biodiversity, overpopulation and deforestation (level 3 question) Level 3 words include: APPLY BUILD CHOOSE CONSTRUCT DEMONSTRATE DEVELOP DRAW EXPERIMENT ILLUSTRATE PLAN MAKE USE OF MODEL ORGANIZE SELECT SOLVE UTILIZE
3. Threats to biodiversity the variety of organisms is decreasing an imbalance can cause extinction EXAMPLE: Zebra mussels found attached to every species of clam in the St. Lawrence River have decimated the populations of 5 of the 8 species found in the river. were introduced to the Great Lakes in the ballast water of tankers
4. Pesticide use using chemicals to kill and control pests - will sometimes kill non-target species - pollutes water sources - causes health problems 5. Biological magnification concentrations of a harmful substance increase in organisms at higher trophic levels in a food web
Work with your group to write 1 question about biodiversity, biological magnification or pesticides(level 3 question) Level 3 words include: APPLY BUILD CHOOSE CONSTRUCT DEMONSTRATE DEVELOP DRAW EXPERIMENT ILLUSTRATE PLAN MAKE USE OF MODEL ORGANIZE SELECT SOLVE UTILIZE
Effects on Air Quality 1. Global Warming Atmospheric gases trap heat (Greenhouse Effect) Pollution in our atmosphere causes too much heat to stay on earth Changes overall temperature/climate Raises sea level Affects health of ecosystems
2. Acid Rain Rain that has been made acidic by certain pollutants in the air. pollutants = sulfur dioxide and nitrogen oxides from burning fossil fuels causes health problems damages forests and lakes damages buildings Harmful to animals
Work with your group to write 1 question about Global warming and acid rain (level 3 question) Level 3 words include: APPLY BUILD CHOOSE CONSTRUCT DEMONSTRATE DEVELOP DRAW EXPERIMENT ILLUSTRATE PLAN MAKE USE OF MODEL ORGANIZE SELECT SOLVE UTILIZE
Effects on Water Quality Single largest source of water pollution is: runoff of silt, soil, pesticides, and fertilizers from agricultural land Eutrophication: - excess fertilizers run-off into lakes and ponds stimulates plant and algae overgrowth - Algae buildup decreases levels of dissolved oxygen in the water this leads to the dying off of the fish population - lakes and ponds slowly begin to fill in Why can t you just clean up polluted water? - it is expensive - who pays for it? - technology not available for all types
Effects on Natural Resources Renewable resources - living organisms regenerate - nonliving: replenished by biochemical cycles - ex. trees, fresh water Nonrenewable resources - cannot be replenished by natural processes - ex. fossil fuels Sustainability = a way of using natural resources without depleting them for future generations HOW? use renewable resources that can be restocked recycle and reuse products plant tree farms selective logging instead of clear-cutting trees follow emission standards
Work with your group to write 2 questions about water quality and natural resources (level 4 question) Level 2 words include: ANALYZE CATEGORIZE CLASSIFY DISCOVER DIVIDE EXAMINE GROUP INSPECT SEQUENCE SIMPLIFY DISTINGUISH DISTINCTION RELATIONSHIPS FUNCTION ASSUME CONCLUDE Write a 3-4 sentence summary about human impact
Homework back of notes!! Questions: 4 on page 1, 2 on page 2 Summary Tree map on human impact Due Thursday BEGINNING OF CLASS Ad to promote decreasing human impact Due Friday BEGINNING OF CLASS