Summary IEB Matric Life Sciences: Environmental Studies
17 views 0 purchase
Course
Life Sciences
Institution
12th Grade
Book
Life Sciences
These notes cover Environmental Studies as per the IEB SAGS. Included are summarized notes on Population ecology, Predator-Prey Relationships, Competition, Ecological Succession, Social Organization and Human Population dynamics. A list of all the definitions you made be asked is also included. If...
, ENVIRONMENTAL STUDIES
THIS TOPIC INCLUDES:
1. Population Ecology
2. Predator-Prey Relationships
3. Competition
4. Ecological Succession
5. Social Organisation
6. Human Population Dynamics
TOPIC BREAKDOWN:
Population Ecology- studying changes in • Factors Affecting the size of a
the SIZE of a population population
• Regulation of Population Growth
• Limiting Factors
• Stable VS unstable populations
• Population Sampling Methods
(direct and indirect)
Predator Prey Relationships- studying • Role/ Significance of Predators
the relationship between prey and • How does the predator-prey
predator populations relationship work
• Examples of predator-prey
relationships (APHID-LADYBIRD,
LION-ZEBRA)
• Food Webs
Competition- two/more individuals • INTRASPECIFIC VS INTERSPECIFIC
competing for resources that are in short competition
supply • Ecological niches
Competitive exclusion
Competitive co-existence:
o Resource Partitioning
-How resources are
partioned in plants and
animals
Ecological Succession- the sequence of • Types of succession: Primary
organism that occupy a new habitat Succession and Secondary
(primary succession) or a disturbed Succession
habitat (secondary succession) • What determines a community
structure
, • Competitive interactions:
Predation and competition
• 3 Stages in succession
1. Pioneer Species Stage
2. Intermediate Species Stage
3. Climax Community
Factors that determine the
endpoint to a community
Social organisation- structure of • Value of social organization
relationships within a group • Social organization techniques:
1. Herds/ Flocks as a predator
avoidance strategy (ZEBRAS)
2. Packs as a hunting strategy
(AFRICAN WILD DOGS)
3. Animals with a dominant breeding
pair (AFRICAN WILD DOGS)
4. Division of Tasks Among Castes
(TERMITES)
Human Population Dynamics- looking at • Reasons for exponential
how human populations change over population growth
time • MDCs VS LDCs
• Ecological footprint
• Future Population Dynamics
• Implications of further population
growth on environment
• Population Pyramids
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller studynotesbym. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.24. You're not tied to anything after your purchase.
