EEB 2100 UConn Exam 1 Questions with 100% VERIFIED Answers

EEB 2100 UConn Exam 1 Questions with 100% VERIFIED Answers "Golden Spike" - Answer (GSSP) Global Stratotype Section and point and refers to evidence in geological strata that signifies the start of a new geological stage of time. 5 stages of population growth - Answer Pre-transition stage characterized by high birth and death rates with births just barely beating out deaths Mortality Transition: Death rate begins to decline rapidly and birth rate remains steady Fertility transition: Birth rate begins to fall rapidly but death rate is still far below and declining Post-transition stage: birth and death rate become so close they begin to cancel one another out Stage 5: unknown as human population has not yet reached this point A Hungry World - Answer most of the world is a little bit hungry with African and Middle Eastern countries being the worst. Climate change will make it harder to grow food in countries where it is already hard Acid Rain ecological impacts - Answer leaches calcium from soil which limits plant growth and damages trees creates a toxic form of aluminum that is spread between plants acidifies lakes which then start to loose sensitive species like trout Acid rain in NE - Answer Comes from coal emissions in the Midwest Acid rain today - Answer Still an issue but it has been reduced by 80% soil has been depleted of buffering so remaining acidity has a much bigger effect Affluence - Answer how much consumption or use their is of something. for example, the US beef consumption has a larger affluence than anywhere else in the world. Put in other words: many people in the population of the US enjoy beef Agricultural fertilizers - Answer Nitrogen and phosphorous cycles have been hijacked by human needs and much less is left in a form usable to plants Agricultural irrigation - Answer Most places are not suitable for crops so lots of water is diverted for use. 80% of water use in the US is for agriculture Agricultural Pesticides - Answer DDT used to get rid of detrimental bugs but has lasting effects in humans and non target animals because of its cancer causing chemicals and accumulation in fat tissues Anthropocene - Answer a new geological period dominated by human destabilization of the earth's natural systems Big picture behind planetary boundaries - Answer All these disturbances are connected to one another so one major change could result in an even large change somewhere else due to the many indirect consequences Biggest risk to ecology - Answer Habitat loss and degradation Bioaccumulation - Answer Pesticides increase in organisms over time as it accumulates in fat tissues Biodiversity loss in cities - Answer Even with slight increases in urbanization, biodiversity decreases rapidly going from 1 to 10 households per hectare you lose half the species found in watersheds Habitats loose their specialists and gain generalists Biomagnification - Answer accumulation of pollutants at successive levels of the food chain biotic homogenization - Answer Certain species coexist well with humans so they are favored in many areas throughout the world, decreasing overall biodiversity in the world Cap and Trade program - Answer power plants are given a certain amount of emissions they could release and they could sell any allowances they didn't use to more dirty plants so they can make money for being cleaner than their competitors City - Answer greater than 50,000 people Clear air act - Answer Cost buisnesses $8 billion per year but benefitted the economy as a whole by $100 billion a year