2 the study of the interactions of organisms w/ its environment. What is Ecology?“Ecology”the study of the interactions of organisms w/ its environment.
3 Population GrowthPopulations grow when birth rate exceeds rate of mortalityDEATH
4 Horizontal axis = Number of individuals Age DistributionAge-Structure Diagram shows growth patterns of populations grouped into categoriesHorizontal axis = Number of individuals
5 Human Age Distribution Developed countriesLess-developed countries
6 Humans are part of the Earth's ecosystem. Human activities can either deliberately orinadvertentlyalter the balanceof an ecosystem.
7 How do human activities affect the environment? What do you Think???How do human activities affect the environment?
8 Will you change your perspective or will you feel the same way? With more info…Will you change your perspective or will you feel the same way?
9 Human impacts on the Environment Global warmingUse of machinery by humans seems to be increasing CO2 levels in the air. CO2 prevents heat from escaping, causes slight world wide temperature increasesRising water temperatures causes coral bleaching
10 Human impacts on the environment DeforestationCaused by demand for wood products,need for space, farmland, housing,roadsDeforestation causesHabitat fragmentationAnimals and plants are forced into confined areas
13 Human impacts on the Environment Ozone depletionCaused by aerosol chemicals calledchlorofluorocarbons (CFCs)CFC’sEscape into atmosphere, reacts breaking down the ozone (O3, a protective atmospheric layer)UV rays penetrate the atmosphere and cause harm to many organism.
15 Human impacts on the Environment Fishing activitiesDemand for fish and shellfishCommercial Fishing be harmful to environment in many ways
16 Human impacts on the environment Invasive species (EXOTIC SPECIES)introduced by people accidentally or intentionallyCan cause problems if no natural enemies are presentCane toad was introduced to Australia to control cane beetles, pest insects that destroy sugar cane crops
17 Human impacts on the Environment Exotic pet tradeCapture and sell wild animals fromexotic locationsWealthy buyers and collectors desireobscure animalsAnimals removed from their habitatcauses an imbalance in the ecosystem
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