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EEB 211 Lecture Notes - Biome, Switch, Intraspecific Competition

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princeton2026
27 Mar 2023
School
Princeton University
Department
Ecology and Evol Biology
Course
EEB 211
Professor

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Document Summary

Ecology - study of the interactions between organisms and between organisms and their environment. Climatic controls over the distribution of life on earth. Perfect example of colonialism and notions of racial superiority in early ecological exploration. Explorer and discovered much about science and biology. Was a big painter and drew chimborazo and showed bands of differing vegetation. Showed that -> climate is the predominant driver of species distributions. Climate - determined by mean annual temperature and mean annual precipitation. Biomes - the major life zones characterized by vegetation types. Biomes are predictably found under particular climate regimes. A graph can be used with precip and temp to show biome. This also works for species ranges also map onto climate. Because the herbivore species requires sufficient vegetation of a specific type to feed. Fundamental niche - a description of species requirements of their environment. One dimensional niche axis - graph showing performance for a specific factor.

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Related Questions

The dominant abiotic factors influencing the structure and distribution of organisms in terrestrial biomes are:

a) available sunlight & predominant vegetation.

b) average annual temperature & precipitation.

c) average annual temperature & available sunlight.

d) predominant vegetation & decomposition.

e) presence of bacterial decomposers & availability of mineral nutrients.

Answer the following essay question:

Name 3 biomes and describe how they differ in temperature, precipitation, and vegetation.

Please Help. Thank you very much.

Ecology is the study of how organisms interact with their environment. Thus, a central question in ecology concerns how organisms respond to environmental variation. The flip side of this question is to ask whether the variation in characteristics of organisms is the result of variation in features of the environment. This variation can occur in space or through time.

1. Make a list of all the environmental variables that you can think of that are likely to be important to organisms. Think about plants and microbes as well as animals.

1A. One environmental change of great concern to us is climate change, specifically the prospect of human-caused global warming, a topic to which we will return. How do organisms respond to this spatial and temporal variability in the environment?