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Environmental Biology - Chapter 1

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by: Sydney Pressley

Environmental Biology - Chapter 1 Biol 1060

Marketplace > East Carolina University > Biology > Biol 1060 > Environmental Biology Chapter 1
Sydney Pressley
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About this Document

These notes cover every section from chapter 1, including extra tidbits our professor spoken during class as well as definitions take from the book.
Environmental Biology
Prof. Patrick Harris
Class Notes
environmental biology, environmental bio, Biology, Bio, Environment




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"Please tell me you're going to be posting these awesome notes every week.."
Lane Schuster

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This 3 page Class Notes was uploaded by Sydney Pressley on Wednesday February 3, 2016. The Class Notes belongs to Biol 1060 at East Carolina University taught by Prof. Patrick Harris in Spring 2016. Since its upload, it has received 80 views. For similar materials see Environmental Biology in Biology at East Carolina University.


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Date Created: 02/03/16
Environmental Biology: Prof. Patrick Harris Chapter 1 – Environmental Sustainability 1. Environmental Sustainability Intro a. Sustainability – the ability to maintain and accommodate three important sources of  change: i. Meeting the needs of the present in an equitable and fair fashion without  compromising nde ability of future generations to meet their own needs b. Earth Day – April 22   i. Celebrated worldwide ii. Brings attention to environmental issues c. Biodiversity – amount of species in the environment d. Earth temperature has risen 1 degree  i. Carbon dioxide up 30% 1. Are humans the problem? YES! e. Earth is 4.6 billion years old 2.  Managing Resources a. Resources dwindled, behaviors changed b. New knowledge led to management  c. Policies addressed conflicts about use such as: i. Commercial interests, clean water, conservation of species d. Goal – maintain human well­being i. Basic needs ii. Good health iii. Social stability iv. Personal freedom e. Ecosystems give us resources such as: i. Food, water, air *oxygen is technically a waste product from plants* 3. Ecosystems a. All the organisms and their physical and chemical environment i. Ecosystems are integrated systems {living and nonliving} b. Ecosystem function: i. Matter and energy are neither created nor destroyed ii. Law of energy and mass conservation = everything goes somewhere iii. Ecosystems are open {Matter and energy flow influence the functions} 1. i.e. chain reactions: More sharks, less fish, less birds, etc. iv. Processes are regulated by biotic and abiotic factors 1. Dynamic homeostasis c. Change is inevitable and essential  d. Ecosystems constantly change i. Seasonal 1. Temperature, moisture, etc. ii. Disturbances 1. Fires, hurricanes, tornadoes, etc. e. Don’t ignore change, adapt to the change in the environment i. Positive feedback 1. Increase: fish eat algae, less algae, fish die, algae grows, more fish,  fish eat algae, less algae, etc. ii. Negative feedback 1. Decrease: less forest leads to more erosion, more erosion leads to less  forest iii. These help stabilize the environment 4. Acting sustainably a. Well­being of present and future humans are dependent on acting sustainably i. Must understand that ecosystems are essential ii. Actions should not disrupt functions of the ecosystems b. Managing resources – sustainable actions must conform to law of mass and energy  conservation i. Use of nonrenewable resources violates law 1. Nonrenewable – if the amount of resource is limited and therefore  cannot be renewed 5. Uncertainty, Science and Systems Thinking a. Sources of uncertainty i. Ignorance 1. We don’t know enough ii. Complexity 1. We don’t understand how the parts work together b. Ozone is a key element in absorbing UV  i. Losing the ozone layer results in an increase in UV B light rays 1. UV B light rays cause mutations, skin cancer, and stops  photosynthesis ii. What depletes the ozone? 1. Chlorofluorocarbons c. Correlation vs. Cause and Effect i. Correlation is the way to things intertwine and relate to each other ii. Cause and effect is a step by step process in which one thing happens, another occurs d. Answering scientific questions require the scientific method i. Science is a body of facts and explanations and the process used to gain that  knowledge e. Facts may change as more data is collected f. Science is limited to questions about the natural world, science is not subjective!!! g. Scientific Method i. Observation ii. Inference iii. Hypothesis iv. Prediction v. Analyze vi. Communicate h. Observational vs. Experimental studies i. Observational: 1. Data collected in the real world 2. No manipulation 3. Only shows correlations ii. Experimental 1. Data collected by manipulating variable 2. Uses test groups and controls 3. Can show cause and effect relationship i. Independent vs. Dependent variable i. Independent 1. Factor that is being manipulated ii. Dependent 1. The factor being controlled j. Test vs. Control Group i. Test group 1. The group being manipulated ii. Control group 1. The group being used as a comparison to the test group


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