Home Site Map Contact Us
Rapid Learning Member Login  
Rapid Learning Blog Rapid Learning on Facebook Rapid Learning on Youtube Rapid Learning on Twitter
 How to Learn in 24 Hours?

 Need Help?
M-F: 9am-5pm(PST):
Toll-Free: (877) RAPID-10
US Direct: (714) 692-2900
Int'l: 001-714-692-2900


24/7 Online Technical Support:
The Rapid Support Center

Secure Online Order:
Buy Now

 

 Got Questions?
Frequently Asked Questions
 Need Proof?
Testimonials by Our Users

Trustlink is a Better Business Bureau Program.
Rapid Learning Center is a fivr-star business.

External TrustLink Reviews




 Member Login:
User ID: 
Password: 
 

 Rapid Learning Courses:

MCAT in 24 Hours (2016-17)

USMLE in 24 Hours (Boards)

Chemistry in 24 Hours

Biology in 24 Hours

Physics in 24 Hours

Mathematics in 24 Hours

Psychology in 24 Hours

SAT in 24 Hours

ACT in 24 Hours

AP in 24 Hours

CLEP in 24 Hours

DAT in 24 Hours (Dental)

OAT in 24 Hours (Optometry)

PCAT in 24 Hours (Pharmacy)

Nursing Entrance Exams

Certification in 24 Hours

eBook - Survival Kits

Audiobooks (MP3)


 Tell-A-Friend:
Have friends taking science and math courses too? Tell them about our rapid learning system.


Community Ecology and Ecosystem

Topic Review on "Title":

Views of Communities
Community is an assemblage of species living close enough together for potential interaction. Community structure emerges from an interaction of many environmental variables that permits species to exist in certain places. There are two views to discuss why certain species are found together in communities.

Properties of Communities & Coevolution
Species diversity or richness is the number of species that make up a community which include relative abundance. Some species are quite rare in a community where as other species are plentiful. Dominant species are those which are abundant and have major impact on the community as a whole. Grouping of communities according to similarities in overall form without regard to the actual species is the basis for the biomes. Various feeding relationships of a community determine the flow of energy and cycling of nutrients from plants to herbivores and then to carnivores. Community stability is the ability of the community to bounce back to its original composition in the wake of some disturbance such as a fire or a disease that kills most individuals of a dominant species. Coevolution is an interspecific phenomenon which is of great importance in community ecology.

Community Interactions
Interspecific competition for limited resources determines species diversity in some communities. Closely related species can coexist if there are one or more significant differences in their niches. Predation has important roles in the evolution of defensive adaptations in the prey species. Symbiosis has different impacts on a community. Parasitism resembles the predator-prey relationship but does not kill the host. It shows coevolution. Dynamic multiple interactions of organisms with both biotic and abiotic aspects of their environment results in a complex community property, the composition of species.

Succession
Succession involves changes in species composition of a community over ecological time. Primary succession occurs where no organisms previously existed whereas secondary succession occurs after disturbance of an existing community. Facilitation, inhibition and tolerance are the causes of succession.

Geographic Aspects of Diversity
Biogeography is the study of the past and the present distribution of species, deals with species diversity and composition in realms that have boundaries, ultimately associated with the patterns of continental drift. Islands are instructive in studying the role of dispersal in determining the species composition of communities.

Ecosystem
Ecosystem is the level of ecological study that includes all the organisms in a given area along with the abiotic factors with which they interact. Most ecosystems are driven by energy from sunlight. Energy flow and chemical cycling are two inter related processes that occur by transfer of substances through the feeding levels of ecosystems. Trophic levels begin with producers, autotrophic organisms that support all other components of the community. The main producers in photosystems are photosynthetic autotrophs. Primary productivity is the rate at which light energy is converted to the chemical energy of organic compounds by autotrophs in an ecosystem. Biogeochemical cycles are the various nutrient circuits which involve both biotic and abiotic components of ecosystems. Three important chemical cycles are carbon, nitrogen and phosphorus cycles. The biosphere is a kind of superorganism with a self regulated metabolism that helps counter fluctuation in the physical environment. Processes occurring at one location can have far reaching effects and consequences.


Rapid Study Kit for "Title":
Flash Movie Flash Game Flash Card
Core Concept Tutorial Problem Solving Drill Review Cheat Sheet

"Title" Tutorial Summary :

Community is an assemblage of species living close enough together for potential interaction. Species diversity or richness is the number of species that make up a community which include relative abundance. Some species are quite rare in a community where as other species are plentiful. Coevolution is an interspecific phenomenon which is of great importance in community ecology. Interspecific competition for limited resources determines species diversity in some communities. Closely related species can coexist if there are one or more significant differences in their niches. Succession involves changes in species composition of a community over ecological time. Biogeography is the study of the past and the present distribution of species, deals with species diversity and composition in realms that have boundaries, ultimately associated with the patterns of continental drift. Ecosystem is the level of ecological study that includes all the organisms in a given area along with the abiotic factors with which they interact. . Biogeochemical cycles are the various nutrient circuits which involve both biotic and abiotic components of ecosystems. Three important chemical cycles are carbon, nitrogen and phosphorus cycles.


Tutorial Features:
  • General concept maps of community ecology
  • Concept maps of community interactions and ecosystem interactions
  • Colorful flow chart of chemical cycling
  • Colorful flowchart of human intrusions in ecosystem dynamics

"Title" Topic List:

Views of Communities

  • Introduction
  • Two Views

Properties of Communities & Coevolution

  • Species Diversity
  • Relative Abundance and Dominance
  • Prevalent Form of Vegetation
  • Trophic Structure
  • Stability
  • Coevolution

 
Community Interactions

  • Competition between Species
  • Predation
  • Symbiosis
  • Complex effects of community interactions on species diversity

Succession

  • Introduction
  • Causes
  • Disturbance
  • Equilibrium

Geographic Aspects of Diversity

  • Limits of Species
  • Island Biogeography

Ecosystem

  • Trophic Levels and Food Webs
  • Energy Flow
  • Chemical Cycling
  • Human Intrusions in Ecosystem Dynamics
  • Superorganism

See all 24 lessons in College Biology, including concept tutorials, problem drills and cheat sheets:
Teach Yourself College Biology Visually in 24 Hours


© 2016 Rapid Learning Inc. All rights reserved         Disclaimer | Privacy Policy | Affiliates