Population Density / Carrying Capacity
A forest has 500 trees in 2 hectares. What is the population density?
What is 250 trees per hectare?
An outbreak of influenza spreads faster in crowded cities than in rural areas.
What is density-dependent?
Elephants have few offspring and invest heavily in their care, leading to this survivorship pattern.
What is Type I?
A tapeworm living in a human intestine is an example of this.
What is parasitism?
The number of different species in a community is called ____.
What is species richness?
If 800 fish live in a pond of 4 hectares, the population density is ____.
What is 200 fish per hectare?
A volcanic eruption eliminates almost all life on an island.
What is density-independent?
Marine invertebrates, such as oysters, produce thousands of offspring, most of which die early. This is an example of ____.
What is Type III?
A lion hunting a zebra is an example of this relationship.
what is predator/prey?
A coral reef where fish species are almost equally represented has high ____.
What is species evenness?
Explain why a species with few natural predators may still be limited by carrying capacity.
Because resources like food, water, and shelter are finite.
Limited nesting sites cause competition among bird species.
What is density-dependent?
Many birds and lizards show fairly constant death rates at all ages. This corresponds to ____.
What is Type II?
This term describes a close, long-term biological interaction between two different organisms.
What is symbiosis?
Coral reefs damaged by bleaching events may slowly rebuild their coral populations. This illustrates ____.
What is resilience?
If a forest has 150 trees in 0.5 hectares, the density per hectare is ____.
What is 300 trees per hectare?
A late frost kills crops and insects equally in all regions.
What is density-independent?
A flat line at the top of a survivorship curve indicates high survival of ____.
What is young individuals?
Remoras ride on sharks to get leftover food; the shark is unaffected.
What is commensalism?
Predators maintaining the balance of species diversity in a community act as ____.
What are keystone species?
A farmer raises cows on a limited pasture. Adding more cows than the land can support will reduce milk and health. This demonstrates ____.
What is exceeding carrying capacity?
A predator–prey relationship that cycles over time is regulated by this kind of limiting factor.
What is a density-dependent factor?
A population with a Type II curve is equally likely to die at age 1 or age 10. True or False?
Bees collect nectar from flowers while spreading pollen.
What is mutualism?
A wetland that filters pollutants and remains stable after heavy rainfall demonstrates ____.
What is resistance?