What This Document Is
These are lecture notes from Week Two of Introduction to Environmental Science (BIOL 115) at Columbia College. The material introduces core ecological principles, focusing on how species interact with each other and their environments, the concept of biomes, and the fundamentals of population biology. It explores the factors influencing where organisms live – a field called biogeography – and how these distributions are being reshaped by climate change and human activity.
Why This Document Matters
These notes are essential for students enrolled in BIOL 115 seeking to grasp foundational ecological concepts. They are most valuable when used *in conjunction with* lectures and assigned readings, serving as a structured review and clarification of key ideas. Understanding these principles is crucial for anyone studying environmental science, as they underpin more complex topics like conservation, ecosystem management, and the impacts of environmental change.
Common Limitations or Challenges
This document provides a *summary* of lecture material. It does not replace the need for active participation in class, completion of assigned readings, or further independent study. It’s a starting point for understanding, not a comprehensive textbook. The notes present concepts; applying them to real-world scenarios requires additional practice and critical thinking.
What This Document Provides
This week’s notes cover:
* An overview of species interactions, including Liebig’s and Shelford’s principles of tolerance.
* The concepts of habitat and niche, including specialist vs. generalist strategies and the Competitive Exclusion Principle.
* An introduction to natural selection, genetic variation, and adaptation.
* Discussion of factors influencing species distribution, including abiotic and biotic pressures.
* A brief overview of biogeography and its relevance to climate change.
This preview *does not* include detailed examples of resource partitioning, a full exploration of different types of species interactions (beyond predation and competition), or in-depth analysis of population growth models. It also does not contain any practice questions or assessments.