Define the biogeochemical cycles that affect humans

The nitrogen cycle is another biogeochemical cycle critical to life . Nitrogen is especially important to ecosystem dynamics because many ecosystem processes, such as primary production and decomposition, are limited by the available supply of nitrogen.

Human activities have greatly increased carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere. Altered biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.

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