Why do most micro habitats less diverse than large habitats?

Microhabitats tend to be less diverse than larger habitats primarily due to their limited space and resources, which restrict the number of species that can coexist. The smaller area often leads to more pronounced environmental fluctuations, making it harder for many species to establish stable populations. Additionally, microhabitats may lack the variety of niches available in larger ecosystems, reducing the opportunities for different species to thrive. Consequently, the overall biodiversity is typically lower in microhabitats compared to their larger counterparts.