This 17-slide PowerPoint presentation covers 'Topic 4.1 - Species, Communities & Ecosystems' in the 2016 IB Biology curriculum. Each slide includes the specific learning objective as well as key vocabulary that students should note. The topic has been divided into two sections:
A - Organization
B - Nutrition & Sustainability
** Please note that this does not include the field work (quadrats & chi-squared) material as that is better covered using actual equipment and examples.
The presentation itself contains minimal information as it is intended to be used with teacher guidance. They are also formatted to be visually pleasing and to print well for handouts or revision. Please see the preview file for an idea of the slide aesthetic and level of detail.
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
U1: Species are groups of organisms that can potentially interbreed to produce fertile offspring.
U2: Members of a species may be reproductively isolated in separate populations.
U3: Species have either an autotrophic or heterotrophic method of nutrition (a few species have both methods).
U4: Consumers are heterotrophs that feed on living organisms by ingestion.
U5: Detritivores are heterotrophs that obtain organic nutrients from detritus by internal digestion.
U6: Saprotrophs are heterotrophs that obtain organic nutrients from dead organisms by external digestion.
U7: A community is formed by populations of different species living together and interacting with each other.
U8: A community forms an ecosystem by its interactions with the abiotic environment.
U9: Autotrophs obtain inorganic nutrients from the abiotic environment.
U10: The supply of inorganic nutrients is maintained by nutrient cycling.
U11: Ecosystems have the potential to be sustainable over long periods of time.
S1: Classifying species as autotrophs, consumers, detritivores or saprotrophs from a knowledge of their mode of nutrition.
S2: Setting up sealed mesocosms to try to establish sustainability. (Practical 5)