Living Resources SOL 6.2 c,d SOL 6.9 a,c,d Living Resources Chapter 3 Section 1 Issues continued • Population Growth: As the population continues to grow so does the demand for resources. (Improvements in medicine, agriculture and sanitation) • Pollution: Any change to the environment that has a negative effect on living things. Environmental Issues • Types of Environmental Issues: Resource Use Population Pollution Resource Use: Renewable Resources: Are naturally replaced in a relatively short time. (trees) Nonrenewable Resources: Natural resources that are not replaced as they are used. (Oil, natural gas, coal) Approaches to Environmental Issues • Can be: Personal - Local - National -Global Car - Landfill - oil drilling - Earth’s atmosphere • Environmental Science: Is the study of the natural processes that occur in the environment and how humans affect them. Different Views • Development Viewpoint: The belief that humans should be able to freely use and benefit from all of Earth’s resources. • Preservation Viewpoint: The belief that all parts of the environment are equally important, no matter how useful they are to humans. • Conservation Viewpoint: Is the belief that people should use resources from the environment as long as they do not destroy those resources. Review List the three main types of environmental issues? Resource management, population growth & pollution Define environment science: The study of natural processes that occur in the environment and how humans can affect those processes. Section 2 Forest and Fisheries • Because new trees can be planted to replace trees that are cut down, forest can be renewable resources. Forest • Clear-cutting: Is the process of cutting down all the trees in an area at once. • Select cutting: Cutting down only some trees in a forest and leaving a mix of tree sizes and species behind. • Sustainable yield: Is a regular amount of a renewable resource such as trees that can be harvested without reducing the future supply. Fisheries • Fishery: An area with a large population of valuable ocean organisms. • Managing fisheries for a sustainable yields includes setting fishing limits, changing fishing methods, developing aquaculture techniques, and finding new resources. Biodiversity • Biodiversity: The number of different species in a given area. • Factors that affect biodiversity in an ecosystem include area, climate, and diversity of niches. • Keystone Species: A species that influences the survival of many other species in an ecosystem. Extinction of Species • Endangered Species: Species in danger of becoming extinct in the near future. • Threatened Species: Species that could become endangered in the near future. Extinct Animals Causes of Extinction • Humans can also threaten biodiversity. These activities include habitat destruction, poaching. Pollution, and introduction of exotic species. • Habitat Fragmentation: Breaking larger habitats into smaller, isolated pieces. Or fragments.