ecosystems increased over 200%. Additionally, there was a reported fourfold increase of inorganic nitrate carried by rivers from inland areas into coastal waters. Nitrogen is a critical limiting nutrient in many systems, including forests, wetlands, and coastal and marine ecosystems; therefore, this change in emissions and distribution of Nr has resulted in substantial consequences for aquatic and terrestrial ecosystems.

Atmosphere

Atmospheric N inputs mainly include oxides of N (NO_x), ammonia (NH₃), and

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