BIOL 121 Lecture Notes - Lecture 1: Area Density, Ecosystem Ecology, Intertidal Zone

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BIOL 121 Full Course Notes

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Ecology : scientific study of how organisms interact w/ each other. Describe / quantify patterns of distribution & abundance of understand factors that affect these patterns organisms , ( geographic ) distribution : where organisms are found. Abundance : # of organisms found in a given area. Can refer to # of individuals (cid:8869) in a population - absolute abundance. * species distribution & abundance determined by dispersal ability. Understand now / why population sizes change over time (cid:8869) factors affecting pop . size / growth / structure. Study of how species interact & consequences for community structure. Ecosystem ecology : nutrients cycle patterns of distribution on global / large scale. Physical & climatic barriers prevent dispersal of individuals to new geographic locations dispersal : one - way movement of individuals / gametes usually from a site where an individual is born to a new area. Interchangeable w/ migration 1 but terms have different meaning.

Related Questions

In relation to animals are thermogenic tissues associated with different individuals or different times of development of individuals in a population of organisms. Can you make an argument for why thermogenic tissues have the temporal distribution that you found in animals? Does S/V ratio influence the presence, or the timing of utilization, in those organisms that possess these types of tissues?

1. What is a âlognormalâ distribution? Have you heard this kind of a distribution under a different name?

Lognormal distribution is a distribution of relative abundances of species by plotting the abundance of species as a frequency distribution in which each abundance interval is twice the preceding one (1, 2, 4, 8).

-It is a statistical expectation

-Product of many random environmental variables acting on the population of species

2. Why would a species survey with a greater sample size show a more complete lognormal distribution than a survey with a smaller sample size?

3. What two factors are considered in a quantitative diversity index? How do these factors differ from each other?

4. Explain how environmental heterogeneity can generate both aquatic and terrestrial plant diversity.

5. Consider the intensity of some disturbance in a community along a gradient (lowâ¦ mediumâ¦ high intensity). Use a âGoldilocks and the Three Bearsâ analogy to explain how species diversity can be shaped by disturbance along such a gradient.

Why are patterns of large scale distribution clumped or patchy?

Describe the factors that make a species rare. Give examples.

What are two mechanisms by which populations can disperse? Can you provide an example of each?

explain in deatiles and type it please

BIOL 121 Lecture Notes - Lecture 1: Area Density, Ecosystem Ecology, Intertidal Zone

BIOL 121 Full Course Notes

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