Question

Negative density dependence 1) Helps maintain diversity in the tropical forest 2) Is the result of competition among organisms that have the same requirements 3) Results from attracting specialized predators to areas where there are many of the same prey item 4) Results from pathogens in the soil 5) All of the above

Answer 1

Answer – Option 5. All of the above.

Density dependence- occur when density of population regulate the population growth rate.

Negative density dependence is the situation where population is curtailed by crowed and predator competition. High competition result in decreased contribution of organism in the next generation. Like not all the available male will be able to produce off-spring.

Option 1 is correct because conspecific negative density dependence is negative interaction among plant species. This ecological pattern maintain higher species diversity in the tropics.

Option 2. Is correct because competition reduce number of organism.

Option 3. Is correct because more predator result in less number of organism.

Option 4. Is correct as more pathogen in soil damage roots and finally reduce the number of plant population.