Lecture 7: Community Ecology Flashcards
How does size affect the reproductive output?
Larger sizes of salmon produced larger eggs
X- axis has length of salmon
Y -axis had egg weight
How do bamboo reproduce?
Synchronized semelparity: all produced seeds at once, hence some seeds escape to germinate.
What is masting?
Iteroparity synchrony of Acron production, in order for the plants to have some of its seeds escape predators and grow.
What is a fast life style called?
R-strategy
What are the characteristics of r-strategy?
- faster growth rate
-shorter generation time
-smaller body size
-More investment in reproductive tissues
-Poor competitors
-Good at dispersal
-Produce more but lighter seeds
-Semelparity more likely
-Shade intolerant, seed domancy
-Born to run
What is a slow life style?
K -strategy
What are characteristics of K-strategy
-Slower growth rate
-longer generation time
-larger body size
-more internal care
-lower reproductive rate
-More competative ability
-Poor at dispersal
-More investment in individual offspring
-Iteroparity more likely
Shade tolerant
What does selection generally prefer?
Faster reproduction, because it can get more gene copies in
What is Ex?
Expected years left for an individual
What Vx:
Reproductive value: number of future daughters a individual can have of age x
What shape does the graph have for reproductive value in human?
hump shape. (age at x, Vx at y)
What is conspecific?
Competition between same species (intraspecific competition)
What is heterospecific?
Interspecific competition: Competition between different species.
What is scramble or exploitative competition?
One individual uses a resource hence depleting the resource for other species.
Like squirrels and birds
What is contest/ Interference competition?
Individuals interacting for something like land.
like argintine ants and Invasive ant species
the superior one kills the other one, binging down the population.
