Chapter04-2

# Chapter04-2 - Here's what I see in CPS About half the class...

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Here’s what I see in CPS! About half the class has never entered their first and last name. Please go to www.einstruction.com , select Student from the top of the screen, then sign in and on the next screen which displays your classes, there will be a section entitled “ UPDATE MY PROFILE where you should enter your first and last name. I cannot give credit for attending class until you do this. Don’t go here!

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Biological Communities and Species Interactions Part II : Ecology Critical Analysis due Fri 8 Feb by 12:15 PM. Don’t procrastinate! EXAM I is next Tuesday (12 Feb). It will cover critical thinking, scientific method, environmentalism, sustainability, ethics, energy, matter, critical factors, evolution, trophic interactions, productivity, diversity, succession, edge effects, and biomes. See text Intro (pp. 1-13) & Ch 1-5 (pp. 16-116)
After studying the 2 nd ½ of Chapter 4 you should: understand equations for productivity understand ecological interactions ( predation , competition , symbioses ) understand the process of succession identify exotic spp and understand the effects exotics have on indigenous spp .

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Community Math Gross Productivity (GP) – a.k.a. Primary (1 o ) P Organic matter P before any use. Indicates the rate of solar or chemical energy conversion to chemical energy. Respiration (R) - After orgs P organic matter, some of the matter can be "burned" to move, make new kinds of compounds, grow, repro- duce, etc . 1 o Producers (1 Producers (1 o P) use ~ 15% of their energy for R P) use ~ 15% of their energy for R Herbivores (H) use ~ 70% of their energy for R Herbivores (H) use ~ 70% of their energy for R Carnivores (C) use ~ 95% of their energy for R Carnivores (C) use ~ 95% of their energy for R VIMP ! VIMP !
Biomass (B) amount of organic matter in ecosystem organic material created by photosynthetic and chemosynthetic organisms & transferred to higher trophic levels usually given in DRY WT (g/m 2 ) because diff sizes and shapes of orgs hold diff amounts H 2 O begins w/ autotrophs (1 o P) followed by hetero- trophs (1 o C, 2 o C, 3 o C, etc.) Terrestrial we use (g / m 2 ) (g Carbon / m 2 ) (kJ / m 2 ) Aquatic we use (g / m 3 ) (g Carbon / m 3 ) (kJ / m 3 )

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- Energy remaining after respiration . What’s left over for future use OR the change in biomass (B) o/ specified time. NP = B NP = B 2 2 - - B B 1 1 Weight or amount of biomass at the end of the study Weight or amount of biomass at the beginning of the study VIMP ! VIMP !
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## This note was uploaded on 04/22/2008 for the course BIOL 103 taught by Professor Brown during the Spring '08 term at VCU.

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Chapter04-2 - Here's what I see in CPS About half the class...

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