Bio Week 10 Notes
Bio Week 10 Notes Bio 111
Popular in General Biology
Popular in Biology
This 3 page Class Notes was uploaded by Sierra Taylor on Wednesday March 9, 2016. The Class Notes belongs to Bio 111 at California Polytechnic State University San Luis Obispo taught by Eric Noel in Winter 2016. Since its upload, it has received 57 views. For similar materials see General Biology in Biology at California Polytechnic State University San Luis Obispo.
Reviews for Bio Week 10 Notes
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 03/09/16
3/7: Last day of lecture, Wednesday is review, no lecture on Friday iClicker: An ecosystem consists of all the living and nonliving things functioning together in an area. Latitudinal banding of tropics, deserts, temperate and polar climates is best explained by atmospheric circulation patterns because it moves air around to become cooler/warmer. A rain shadow describes the lower average rainfall that occurs on the backside of mountains. (15.5) Global Patterns of Ocean Circulations due to combination of wind, Earth’s rotation, gravitational pull of the moon, temperature, and salt concentration North Hemisphere’s circle is clockwise, South Hemisphere circle is counterclockwise beaches on the East coast of U.S. have warmer water than west coast at the same latitude because of where warm/cool water is held during the circulation ex. Gulf Stream El Nino: occurs every 29 years, drastic climate change blamed for flooding, droughts, famine and other extreme disruptions Usual Conditions: huge gust of wind from South Asia to Australia cooler water pushed west heats up Australia and South East Asia energy cools in the air and rains increased tide level cold waters replenish from the Earth, rich in nutrients El Nino: usual wind gust eases less warm water displaced and retained East, cools down and rains in the East tides become different no water being replaced in the West, causing extra warm water and no new nutrients feeding the marine environment (15.6) Energy flows from producers to consumers transitioning photons to chemical energy Sun 1. Producers: plants convert photons using photosynthesis, ex. plants, algae 2. Primary Consumers: herbivores eat plants, ex. rodents, termites, dairy cows 3. Secondary Consumers: carnivores eat herbivores, ex. snakes, cats, tarantulas 4. Tertiary Consumers: top carnivores eat other carnivores, ex. hawks, tigers, sharks, humans Food chain: pathway from photosynthesis producers through various levels of animals Food web: involves harvesting energy from multiple stops in the food chain ex. Campbell’s Chicken and Rice: eating both animals and plants Secular diet: 30% animal, 70% plant Regulators of Decomposition Detritivores and decomposers. ex. mold decomposing oranges, dung beetle (detritivore) feeds off decomposing matter Purpose of breaking down organic wastes so then can be recycled throughout the food chain. (15.7) Energy Pyramids, 10% Efficiency Rule 10% of the biomass (total weight of living organisms) of plants is converted into herbivore biomass. ex. herbivores eat 5 pounds of plant, gains 0.5 pounds of weight The rest goes and is expended in cellular respiration or lost as feces. humans can only process 30% of protein ex. 12,000 pound of grain needed for a 1,200 pound cow, human eats entire cow and gains 120 pounds, dinosaur eats human and gains 12 pounds 90% is lost throughout the chain this is an example of an energy pyramid There is always less energy available at higher trophic levels than at lower trophic levels. 3 Models of Energy Pyramids LargeBase: supports large consumers ex. rainforests, marshes, algal beds SmallBase: reduced ability to support consumers, ex. deserts, tundra, open oceans Inverted (Rare): small biomass of producers, large consumers, ex. aquatic ecosystems where plankton are producers Workshop Notes List three types of life history tradeoffs and provide examples: 1 High reproduction, low survival: salmon, die after reproducing 2 High reproduction, low growth: beech trees, grow slowly when reproducing 3 Number and Size of Offspring: few larger eggs vs. many small eggs Life histories include age at first reproduction, litter size and frequency, longevity, and probabilities of survival and reproduction at each age. Three areas an organism can allocate its resources are growth, reproduction, and survival. Biome: large ecosystems that occur around the world and are determined by temperature and rainfall. How does the angle of sunlight hit the Earth affect weather? Hits straight at the equator so warm temperatures occur, heat rises and it warms and then becomes cooler towards the poles. Why are Earth’s poles very dry? Temperature gradient generates atmosphereic circulation patterns that result in heavy rain and the equator and deserts at 30 degrees latitude. What is a rain shadow and how is it formed? A rain shadow describes the lower average rainfall that occurs on the backside of the mountains; wind blows from ocean to land and rises when hitting the mountains, the rising air cools and can’t hold the moisture so clouds form and it rains, the air passes over the mountains and falls, leading to the warmer air. Urban areas are warmer than rural areas. Streets in large cities are windy because the tall buildings are essentially redirecting the wind through the tightly packed city, causing it to increase speed and funnel. During el Nino years South Am to SE Asia winds ease up, how does this affect plankton populations, and rain in the west? LOOK AT NOTES FROM LECTURE, HERS ARE CONFUSING During each energy conversion in a food web, some energy is lost as heat. The 10% rule is that with each step of trophic level will only consume 10% of energy grom the previous trophic level and 90% of it will be lost. Where does the biomass that is not passed down the energy pyramid to the next trophic level go? Back into the atmosphere for cellular respiration and into feces.
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'