It's quite obvious, the answer is there is less water and food to find in the desert than in the forest.
Desert biomes have harsher environmental conditions, such as high temperatures and limited water availability, which make it difficult for many organisms to survive. Forest biomes, on the other hand, typically have a more stable and favorable environment with abundant water and resources, which can support a greater diversity of organisms.
The deserts usually have fewer numbers of amphibians than most other biomes.
they have more
forest fires
Elevation in freshwater biomes affects temperature, oxygen levels, and nutrient availability. Higher elevations typically have colder temperatures, lower oxygen levels, and fewer nutrients, which can impact the types of organisms that can survive in these environments. Different elevations can create a variety of habitats within freshwater biomes, leading to unique ecosystems and species diversity.
The fewer organism variation could all be eliminated by just one disease that a large variation in organism number could survive. Some with natural disasters, such as fire. A community without birds or large, fast running mammals could be wiped out in a large forest fire.
There are fewer organisms at the top of a biomass pyramid because energy is lost as it is transferred from one trophic level to the next. This means that less energy is available to support the growth and maintenance of organisms at higher trophic levels, resulting in fewer individuals.
Bengal tigers matter to humans because decreasing forest cover by human activities means fewer prey which results to tigers attacking domestic livestock due to fewer prey in the forest.
Extreme environments such as deserts, polar regions, and high mountaintops tend to have lower species diversity due to harsh conditions that limit the ability of many organisms to survive and thrive. Island environments, particularly remote and isolated ones, can also have fewer species compared to mainland areas.
Desert plants typically have fewer stomata compared to rainforest plants. This is because desert plants need to conserve water due to the arid environment they inhabit, so they have adapted to minimize water loss through transpiration by having fewer stomata. In contrast, rainforest plants have more stomata to facilitate gas exchange for photosynthesis, as they are in a more humid environment where water availability is not a limiting factor.
The fewer the trees (cut to make room for the houses), the fewer the bugs, the fewer the woodpeckers.
food/energy