Post on 22-Dec-2015
transcript
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Mon. Tues. Wed. Thurs. Fri.Week ofOct. 27
Week ofNov. 3
Forest ecology lab – dress for weather
Exam 2no OH
Week ofNov. 10
Independent project analysis
Week ofNov. 17
River ecology lab – dress for weather
LabExam
no OH
T lab switch?
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For exam:- Chaps. 6,7,8,13
- Chap. 14 – only equations and concepts we talked about in class
- Chapter 15 – only through p. 302.
Lab open for counting Lemna every day 10 - 4
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Structure of course
Environmental variability
Organisms
Ecosystems
Populations
Species interactions
Communities
Applied Ecological Issues
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Species interactions
Introduction
Consumer/resources interactions(predation, herbivory, parasitism)
Competition
Mutualism
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Species interactions
Introduction
Consumer/resources interactions(predation, herbivory, parasitism)
Competition
Mutualism
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Consumer Resource
Predator Prey
Parasite Host
Herbivore Plant/algae
Detritivore Dead organicmatter
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Consumer/resource interactions
1. Predation
2. Herbivory
3. Parasitism
4. Dynamics of C/R interactions
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Given that predators have adaptationsthat allow them to capture prey,
why don’t predators drive their prey extinct?
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May 15 May 30 June 15 June 30
100%
0%
Cicad
a mo
rtalityd
ue to
pred
ation
Liv
e ci
cad
as p
er 1
,000
m2
6,000
3,000
0
Periodical cicadas
Decline due to thunderstorm
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Consumer/resource interactions
1. Predation
2. Herbivory
3. Parasitism
4. Dynamics of C/R interactions
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Given that herbivores have adaptationsthat allow them to exploit resource,
Why don’t herbivores drive plants extinct?
OrWhy is the world green?
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Consumer/resource interactions
1. Predation
2. Herbivory
3. Parasitism
4. Dynamics of C/R interactions
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Parasites on wood mice
On skin – 1 sp. tick. On fur – 12 sp. of mites,
1 sp. tick, 11 sp. fleas, 1 sp. lice. In stomach
– 1 sp. roundworm. In small intestine – 3 sp.
roundworms, 3 sp. flatworms, 2 sp.
flagellates, 1 sp. ciliate, 1 sp. amoeba. In liver
– 1 sp. tapeworm. etc.
47 species not counting bacteria and viruses
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Consumer/resource interactions
1. Predation
2. Herbivory
3. Parasitism
4. Dynamics of C/R interactions
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Dynamics of consumer/resource interactions
Consumers can reduce resource populations
Examples of cycles
Models of consumer/resource interactions