Summary
Populations and Communites Summary Sheet
Populations and Communities Summary Sheet
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
2 reviews
By: laurenceli525 • 4 year ago
By: oisincassidy1 • 3 year ago
Content preview
Populations and CommunitiesA population is a group of organisms of the same species living in a particular area
Growth of bacteria in closed conditions (Sigmoidal growth curve)
-Lag phase: Very slow increase in no. Nutrient assimilation takes place
-Exponential phase: Bacteria divide exponentially
-Stationary phase: food may become limiting, birth and death rates
approach equilibrium
-Decline phase: DR exceeds BR, population crash, bacteria it could be
due to accumulation of toxins or nutrient supply running out
Biotic potential: Reproductive potential of a population under optimum environmental conditions
with unlimited resources
Environmental resistance: The restriction by the environment on the population reaching its
maximum growth rate and its biotic potential
Carrying Capacity: Maximum number of a population that the ecosystem can support
Competitve Exclusion Principle
Predator-Prey Interaction:
-Predator peaks and troughs lag behind prey
peaks and troughs
-Length of predator cycle is usually similar to
that of the prey
-No. of predators is normally significantly lower
than the no. of prey individuals at equivalent
points
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 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 TiarnanMcKeever. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53340 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now