Which of the following observations indicates competition for space among organisms in a community?

• A. Overlapping territories of two bird species
• B. Symbiotic relationship between fungi and algae
• C. Mutualistic relationship between bees and flowers
• D. Predation of small fish by larger fish

Answer: (A)

Verified step by step guidance

1. Begin by understanding the concept of competition in ecology. Competition occurs when organisms vie for the same resources, such as food, space, or mates, which are limited in supply.
2. Consider the first option: 'Overlapping territories of two bird species.' This suggests that both species are trying to occupy the same physical space, which is a direct indication of competition for space.
3. Examine the second option: 'Symbiotic relationship between fungi and algae.' Symbiosis typically involves mutual benefit, not competition, as both organisms work together for survival.
4. Look at the third option: 'Mutualistic relationship between bees and flowers.' Mutualism is a type of symbiosis where both parties benefit, such as bees getting nectar and flowers being pollinated, which does not indicate competition.
5. Finally, analyze the fourth option: 'Predation of small fish by larger fish.' Predation involves one organism consuming another, which is not competition for space but rather a predator-prey interaction.