Question

All organisms interact with their environment. choose one of the biogeochemical cycles and explain how various types of organisms are part of that cycle and help recycle the substance in an ecosystem. provide one example of how human activity has impacted the cycle you have chosen and one step we can take to reduce human impact on the ecosystem.

Answer 1

All organisms interact with their environment. choose one of the biogeochemical cycles and explain how various types of organisms are part of that cycle and help recycle the substance in an ecosystem. One example of how human activity has impacted the cycle is that humans have polluted the water making it unsafe and in some cases not suitable to support life.

Answer 2

The nitrogen cycle ensures the cycling of this element in the environment, making it available to living beings and releasing it back into the environment. Thus, nitrogen can later be reused by other organisms. Several processes are involved in this important cycle, such as:

• Nitrogen fixation by bacteria such as Rhizobium;

• Decomposition of organic matter (made by decomposing bacteria) and formation of ammonium ion;

• Nitrification process, in which two steps are observed: nitration and nitration.

• Denitrification, in which denitrifying bacteria guarantee the transformation of nitrates into nitrogen gas.

Human interference in the Nitrogen cycle to increase agricultural production concerns the different ways man has found to make this nutrient available to plants through the use of nitrogen fertilizers that have brought with it a range of environmental problems. Human interference was also through biotechnology, with the discovery of new nitrogen-fixing bacteria and their use in certain plant varieties.