The Ecosystem - Its Structure and function plays a key role in the sustenance of Life on this Earth. Be it land, air, water .... the ecosystem decides the survival ...
An Introduction to Ecology 2
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
This is the introductory lesson of the course; 'Foundation of Environmental Management' taught at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka
The Ecosystem - Its Structure and function plays a key role in the sustenance of Life on this Earth. Be it land, air, water .... the ecosystem decides the survival ...
An Introduction to Ecology 2
more chemistry contents are available
1. pdf file on Termmate: https://www.termmate.com/rabia.aziz
2. YouTube: https://www.youtube.com/channel/UCKxWnNdskGHnZFS0h1QRTEA
3. Facebook: https://web.facebook.com/Chemist.Rabia.Aziz/
4. Blogger: https://chemistry-academy.blogspot.com/
This is the introductory lesson of the course; 'Foundation of Environmental Management' taught at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka
Ecology is the study of organisms and how they interact with the environment around them. An ecologist studies the relationship between living things and their habitats.
It encourages young minds to take responsibility for protecting the natural environment
protection through information and knowledge and to develop environmental awareness.
http://essaysreasy.com .That's a sample paper - essay / paper on the topic "Biology" created by our writers!
Disclaimer: The paper above have been completed for actual clients. We have acclaimed personal permission from the customers to post it.
Ecosystem ecology is the integrated study of living (biotic) and non-living (abiotic) components of ecosystems and their interactions within an ecosystem framework. This science examines how ecosystems work and relates this to their components such as chemicals, bedrock, soil, plants, and animals.
1. Chapter 55 - 56
Ecosystems
I. Trophic Relationships in Ecosystems
A. Trophic levels
– 1. Primary producers (autotrophs) support all other organisms in an ecosystem.
– 2. Primary consumers (herbivores) eat autotrophs.
– 3. Secondary consumers (carnivores) eat herbivores.
– 4. Tertiary consumers eat other carnivores.
– 5. Detritivores eat dead stuff and waste.
B. The trophic structure of an ecosystem describes its feeding relationships.
C. A food chain shows a straight line feeding relationship within an ecosystem.
D. A food web shows the complex feeding relationships within an ecosystem.
II. Energy Flow in Ecosystems
A. Primary productivity is the amount of sunlight that is converted into chemical energy
by the autotrophs within an ecosystem over a period of time.
1.Gross primary productivity is the total productivity of an ecosystem-but not the total
energy since some energy that is produced, must be used for cellular respiration.
2.Net primary productivity is the total productivity minus the energy used for cellular
respiration.
B. Trophic efficiency refers to the % of energy that is transferred from one level to the
next.
III. Nutrients Cycle Through Ecosystems
A. The Water Cycle
B. The Carbon Cycle
C. The Nitrogen Cycle
D. The Phosphorus Cycle
2. VI. The Human Impact
A. Biological magnification occurs when toxins become concentrated in the tissues of
animals as they move up through trophic levels.
– top level carnivores are most affected.
B. The Greenhouse Effect is a warming of the earth which may be caused by increased
CO2 released as a byproduct of human activities.
C. The exploding human population has had a major impact:
– 1.habitat destruction
This is the single biggest issue
– 2.extinction of species
– 3.increased pollution
– 4.overfishing
• D. The rapid and unceasing growth of the human population is the most urgent
and serious problem facing our earth.
Chapter 56
Conservation Biology
• I. The Biodiversity Crisis
• A. The current rapid loss of biodiversity is an urgent problem.
– Population densities of migratory birds in the US have dropped 50% in the last
40 years.
– More than 1/4th of all plant species in the US are in danger of becoming extinct.
• Biodiversity hot spots are areas with high #’s of threatened or endangered species.
• B. The major threats to biodiversity are :
• 1.Habitat destruction(the greatest threat).
– Accounts for 73% of extinctions, 93% of coral reefs are damaged
3. • 2. Introduced(nonnative) species cause extinctions by:
• a. Out-competing native species.
• b. Reducing biological diversity.
– Starlings, house sparrows, pigeons, fire ants, nile perch, Kudzu
• 3.Overexploitation of wildlife (due to excessive hunting)
• C. Biodiversity may save our lives…
• -if it isn’t gone before we “get it”!
• D. Species Conservation
• 1. Endangered species are in danger of extinction.
• 2. Threatened species are likely to become endangered.
• 3. Populations that have been split up, form pockets of individuals called
metapopulations. Each metapopulation has different challenges in its’ fragmented
habitat.
• 4.Edges and movement corridors influence biodiversity and survival of species.
– Abrupt edges formed from human activities upset the fragile balance of the
ecosystem.
– E. Restoration Ecology
• 1. Restoration ecology is concerned with returning damaged ecosystems to their natural
state.