poe_01_Fall08[1]

poe_01_Fall08[1] - Ecology- Distribution and Abundance of...

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Unformatted text preview: Ecology- Distribution and Abundance of Organisms Sounds easybut if you think about it DISTRUBUTION ABUNDANCE Where numbers When Descriptive- Natural History vegetation groups Functional Dynamics and Relationships Evolutionary ultimate causes-why natural selection favors observed adaptations Landscape Ecosystem Community Population Individual Arrow represents scale, and decreasing scientifc understanding Methodological Approaches in Ecology (1) Theoretical (2) Laboratory (3) Field Methodological Approaches in Ecology (1) Theoretical Mathematical Representations (2) Laboratory (3) Field Methodological Approaches in Ecology (1) Theoretical Mathematical Representations (2) Laboratory Controlled Conditions (3) Field Methodological Approaches in Ecology (1) Theoretical Mathematical Representations (2) Laboratory Controlled Conditions (3) Field Reality Scientifc Method--Some Terms Laws-universal statements; deterministic; accepted physics, chemistry, genetics Principles-mostly defnitionspopulations have size limits THEORY Hypothesis 1 Hypothesis 2 Hypothesis 3 Models 1 Models 2 Models 3 Experiments 1 Experiments 2 Experiments 3 There are some ecological Laws that are taken For granted Physics--- as it applies to living organisms Ecology of Individuals Born Grow Die Eat Reproduce Produce Organic Waste Have Mass Animal Form and Function Some ideas How do we look at organisms in terms of structure, function and laws The Implications of Body Size Body Size - (BD) Animals and the Problems of Size and Scale Scaling Deals with the structural and functional consequences of changes in size or scale among otherwise similar organisms AN EXAMPLE: A brick house (1) Heavier foundation Thicker walls But there is an upper limit to the size, as a function of thickness of walls..and Fnally, strength of the bricks You live in this crappy little brick house (1) Heavier foundation Thicker walls But there is an upper limit to the size, as a function of thickness of walls..and Fnally, strength of the bricks You live in this crappy little brick house You Want a bigger brick house (2) Change Material: steel as a support structure Another Option: (3) Change Design Compression Tension 100 fold increase in length So, an increase in the size of a structure is possible if you change: Dimensions (thicker walls) and/or Materials (brick to steel) and/or Design (compression to tension elements) A biologist asks: What are the advantages of a certain size, material and design?...
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poe_01_Fall08[1] - Ecology- Distribution and Abundance of...

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