Human Impact on Biodiversity

Part 1 - Human Population Growth The human population shows what type of growth? exponential Logistic Negative What is does this type of growth say about the human population births are equal to deaths and there are no limiting factors births outweigh deaths and there are no limiting factors births are less than deaths and there are many limiting factors births are less than deaths are there are no limiting factors Which is a potential limiting factor to the human population? drinking water food disease all of these Part 2 - How Humans Impact Biodiversity Fill in the blanks below Biodiversity refers to the number of different kinds of organisms living on Earth or in an ecosystem. Many human activities can change environmental conditions in way that alter the biodiversity of an ecosystem. As the human population grows, people use more natural resources. A natural resource is a part of product of the environment that is used by humans or other organisms. Land, water, and air are example of natural resources used by all organisms. When humans use too much of a resource, it may become unavailable to other organisms. For example, when humans clear large amounts of land to build shopping centers they are taking away the natural resources that land provided for other organisms. Match the term to the correct definition Deforestation Cutting down of trees at an unsustainable speed Keystone Species a species that plays a critical role in the community and without the species the community will decline Pollution the release of harmful substances or energy into air, soil, or water Eutrophication when an excess of nutrients are released into a body of water and causes an algal bloom Bioaccumulation (e.g. Microplastics) an increase in the amount of a chemical, like a pesticide, in the tissues of an organism Invasive Species an introduced species that thrives in a new environment and negatively impacts that environment Fill in the blanks below The sun's rays travel to Earth as radiation. From there they can do three things. They can be reflectedby Earth's atmosphere, be absorbed by surfaces of Earth, or be reflected back by surfaces on Earth. When they are reflected back they can travel back to space or be trapped by greenhouse gases in the atmosphere. This is why we say greenhouse gases trap heat. What human activities release greenhouse gases into the atmosphere? photosynthesis respiration by plant burning fossil fuels Logging is the process by which trees are cut down so that wood can be harvested by humans. The wood that results from logging can be used to make many different products, including homes, furniture, and paper.Which of these best describes how the process of logging impacts ecosystems? Logging is usually beneficial to ecosystems because it increases available space Logging can be done in such a way that it causes no disruption to ecosystems Logging results in an overall increase in nutrient availability in ecosystems Logging is one way that humans deplete natural resources in ecosystems Acid rain is occurring in the ecosystems of the Smoky Mountains, limiting the nutrients found in the soil, making it harder for plants to grow, and contaminating the water supply.Which of the following is most likely causing the acid rain? the introduction of invasive species the burning of fossil fuels by humans the overuse of fertilizer on local farms the clearing of trees for construction Deforestation results in _ trees to take in carbon dioxide, which can cause _ temperatures through a(n) _ greenhouse effect fewer; warmer; increased more; cooler; decreased fewer; cooler; decreased more; warmer; increased Fertilizer runoff from farms can get into groundwater and travel to nearby streams. Then, it can eventually end up in lakes. What is one result of excess fertilizer in a lake? decreased aquatic plant growth dirtier water in the lake cleaner water in the lake increased aquatic plant growth