Biodiversity
The unique "role" that a species plays in an ecosystem
Niche
Define ecological succession in your own words
The change in species composition in an area over time
What is one example of how human activity harms biodiversity
*answers may vary
What type of succession is this any why?- a hurricane comes through an area and knocks down 80% of the trees in a forest.
Secondary- there is still soil available after the storm.
The three levels of biodiversity
Species, genetic, ecosystem (or habitat)
The key difference between primary and secondary succession
Primary- no soil at the beginning, secondary- starts with soil already present.
How many mass extinctions has Earth had in it's history (excluding the present one)
5
The main threat leading to the loss of elephants in Africa
Poaching
More stable conditions makes it easier to specialize. More niches = more species
Climax community
What is one reason biodiversity is important for humans?
Examples: pollination of crops, ecosystem services, new discoveries, health and nutrients
How does biodiversity increase the resilience of an ecosystem?
More variety of species= more likeliness that some will survive a disturbance.
The two important parameters used to measure biodiversity
Richness and Evenness
Give an example of an early pioneer species in primary succession
moss, lichen (after that ferns and simple plants)
What are at least 2 factors leading to the decline of native bee populations?
disease, climate change, pesticide use
The successional stage made up of shrubs and small trees.
Intermediate species
Which list of letters has greater overall diversity and WHY?
1: AAAYAAAABAAAACAAAAAAAAAAR
2: YYYYYAAAAAACCCCCCCBBBBBB
List 2 because it has greater evenness (even though there is one fewer different letter)
How was the man in the food forest video able to produce so much food with so little work compared to conventional (monoculture) farming?
use knowledge of succession to explain
Example: To reduce plastics in the ocean, ban single-use containers from being manufactured.
Which set of letters has the greatest richness and why?
1. TTTTGGGGUUUUYYYY
2. TTGTTTUTTTYTTTHTTV
2 because it has more different letters