Ch 52 - Chapter 52 Notes Overview: The Scope of Ecology...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 52 Notes Overview: The Scope of Ecology Ecology is the scientific study of the interactions between organisms and the environment. These interactions determine distribution of organisms and their abundance. Ecology reveals the richness of the biosphere. The Scope of Ecological Research Organismal ecology studies how an organism’s structure, physiology and behavior meets the environments challenges. Population ecology focuses on factors affecting how many individuals of a species live in one area. Community ecology deals with the whole array of interacting species in a community o A community is a group of populations of different species in an area. Ecosystem ecology emphasizes energy flow and chemical cycling among various biotic and abiotic components. o An ecosystem is the community of organisms in an area and the physical factors with which they interact. Landscape ecology deals with arrays of ecosystems and how they are arranged o A landscape is a mosaic of connected ecosystems. Global ecology examines the influence of energy and materials on organism’s across the biosphere. o The biosphere is the global ecosystem, the sum of all the planet’s ecosystems. 52.1 - Ecology integrates all areas of biological research and informs environmental decision making Ecology has a long history as a descriptive science, it is also a rigorous experimental science
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Events that occur in ecological time affect life on the scale of evolutionary time Ecology provides the scientific understanding that underlies environmental issues 52.2 - Interactions between organisms and the environment limit the distribution of species Ecologists have long recognized global and regional patterns of distribution of organisms within the biosphere. Biogeography is a good starting point for understanding what limits geographic distribution of species. Ecologists recognize two kinds of factors that determine distribution: biotic, living factors, and abiotic, nonliving factors. Dispersal and Distribution Dispersal is movement of individuals away from centers of high population density or from their area of origin. Dispersal contributes to global distribution of organisms. Natural Range Expansions Natural range expansions show the influence of dispersal on distribution Behavior and Habitat Selection Some organisms do not occupy all of their potential range even if they could disperse into this range. Species distribution may be limited by habitat selection behavior. Biotic Factors Biotic factors that affects the distribution of organisms may include: o Interactions with other species o Predation o Competition Abiotic Factors
Background image of page 2
Abiotic factors affecting distribution of organisms include: o Temperature Environmental temperature is an important factor in distribution of organism’s because of its effects on biological processes. Cells may freeze and rupture below 0°C, while most proteins denature
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/25/2011 for the course BIO 1510 taught by Professor Unknown during the Spring '07 term at Georgia Institute of Technology.

Page1 / 9

Ch 52 - Chapter 52 Notes Overview: The Scope of Ecology...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online