how do the plants in a rainforest contribute to the water cycle?; fluctuations in the phosphorus cycle in aquatic ecosystems; in the carbon cycle, carbon is found in; explain the role of organisms in the carbon cycle.; phosphorus is contained in; what effect do abiotic cycles have on ecosystems?; what is a possible consequence of fertilizer runoff in aquatic ecosystems?; which of the following is not a way in which carbon gases are introduced into the atmosphere