The relation between the biotic and abiotic factors is direct. The abiotic factors use the influence the biotic communities by providing them the environment in which the live and there is direct influence of the abiotic components like soil, water, temperature, topography and others which uses to nourish or harm the communities depending upon the there state of existence. This shows that there is directly proportional influence upon the biotic communities of abiotic factors.
This is a complex question, which requires a complex answer.
Mohsin Salahuddin correctly wrote about the direct effect of the abiotic factors on biotic communities, but it is important also to consider the indirect effects, which are present too.
Precisely, the abiotic factors (e.g. temperature, humidity, solar radiation, etc.) influence directly some parts of the community that, in turn, influence directly other components of the system. Thus, the former abiotic factors, through the influence of the directly affected organisms, undirectly influence other species.
For example, humidity and solar radiation play a key role in the establishment of mosses or pioneer herbs and plants. These, in turn, influence the quality of the soil, the presence of nutrients and the flow of air just above the soil. Then, these latest factors are limitations (or requirements) for certain other plants and animals, to live in such an environment.
Notably, the abiotic factors stand at the base for the establishment of precise species, but once these are settled, they influence too the abiotic factors and biotic ones, creating a complex network of effects that, in the end, composes the framework in which various species can thrive (building the astonishing biodiversity of our planet).
This whole dynamic can be viewed as a two-way road between abiotic and biotic factors.
In conclusion, I would say that biodiversity derives from the direct and indirect influence of the abiotic factors on the biotic ones, in consideration of the weight of each one of them with respect to the species that possibly can colonize or establish themselves in the area.
The abiotic factors in an ecosystem decide which biotic factors will survive in it and what will be their number. The proportion of abiotic factors in an ecosystem is always changing as biotic factors use or excrete abiotic factors. Every biotic factor affects abiotic factors as well as other biotic factors around it. The abiotic factors will define which organisms are able or not to live in a specified place. The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment. So, the abiotic factors are controling the biotic factors of an environment. The abiotic factors will define which organisms are able or not to live in a specified place. The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment. So, the abiotic factors are controling the biotic factors of an environment. Abiotic facts are important because they directly affect how organisms survive. A community of organisms and their abiotic environment. Abiotic factors affect the ability to reproduce and give organisms the ability to survive. They help determine the types and number of organisms that exist within the environment. Abiotic factors help living organisms to survive. Sunlight is the energy source and air (CO2) helps plants to grow. Rock, soil and water interact with biotic factors to provide them nutrition. Interaction between biotic and abiotic factors helps to change the geology and geography of an area. Since biotic factors are living things, the more biotic factors there are in an ecosystem, the more biodiversity there will be. Although abiotic factors are not living things themselves, their presence is still important for biodiversity. The abiotic factors in an ecosystem decide which biotic factors will survive in it and what will be their number. The proportion of abiotic factors in an ecosystem is always changing as biotic factors use or excrete abiotic factors. Every biotic factor affects abiotic factors as well as other biotic factors around it. Abiotic factors are the non-living factors in an ecosystem such as temperature, pH or moisture levels. Extremes of an abiotic factor can reduce the biodiversity of the ecosystem. For example, ecosystems with a very low temperature tend to have low biodiversity. Biotic factors including things like predation, competition, and other species-level interactions that lead to increases or decreases of biodiversity. As the loss of a primary producer can drastically change the biodiversity within an ecosystem.