Final answer:
The lab group should focus their investigation on the effects of overcrowding, competition, and disease on specific species in a forest ecosystem.
Step-by-step explanation:
The lab group should focus their investigation on the following questions:
- What is the effect of overcrowding on the number of deciduous trees?
- What is the effect of competition on the population of deer?
- What is the effect of disease on the bird population?
These questions will allow the lab group to study the density-dependent limiting factors that affect biodiversity and populations in a forest ecosystem. By examining the impact of overcrowding, competition, and disease on specific species, the group can gain a better understanding of how these factors influence population dynamics.