Final Review

Final Review - Table of Contents Title Natural Selection,...

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Table of Contents Title Pg # Natural Selection, Principles of Ecology 2-3 Biocommuntiy 1,2 (Moyle) 4-5 Designing a flow regime for native fish, Biodiversity 6 Conservation Biology 1, 2 7 Conservation: Managing Fisheries and Dealing with Pest 8-9 Sharks, Bats, Conservation of Wetlands, Controlling Aliens 10-15 Introduction Moyle 16 1
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Natural selection and Principles of ecology: niche, habitat and population Natural selection Lecture (Chapter 5) Natural selection is the process by which the forms of organisms in a population best adapted to the environment increase in frequency relative to less well adapted forms over a number of generations. Organisms vary because of environmental factors (food, climate) and genetic factors (inherited differences). Four conditions for natural selection are required: i. More organisms are born than can survive. ii. Organisms vary. iii. This variation is inherited. iv. As a result of this variation, there are differences in survival and reproduction. Evolution can be defined as change over time of the proportions of individual organisms differing genetically in one or more traits. Questions 1. Why do organisms vary? a. Environmental and genetic factors 2. What are the four conditions for natural selection that are required? a. More organisms are born than can survive. b. Organisms vary. c. This variation is inherited. d. As a result of this variation, there are differences in survival and reproduction. Principles of ecology: niche, habitat and population (Chapter 7) Niche o A niche refers to the way in which an organism fits into the ecological community or ecosystem o The niche is the evolutionary result of a species physical structure, psychological, and behavioral adaptations to its surroundings. o Realized Niche or Place Niche-A niche that is limited in extent by the presence of interactions with other species realized by o Fundamental Niche- A species potential to use available resources. 2
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Habitat o The actual location in the environment where an organism lives and consists of all the physical and biological resources available to a species. o The collection of all the habitat areas of a species constitutes the geographic range. Levels or organization o In ecology there are different levels of organization: o Individual Population Community Ecosystem Biome Earth o Species  Group of species  Groups of groups o Small Scale  Large Scale o Population-Interbreeding groups of individuals of the same species, generally living in the same contiguous habitat. Questions 1. What is the difference between a niche and a habitat? a.
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Final Review - Table of Contents Title Natural Selection,...

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