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Surface runoff
Surface runoff is water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle. Runoff that occurs on surfaces before reaching a channel ... > more -
Ecological niche
In ecology, a niche is a term describing the relational position of a species or population in an ecosystem. More formally, the niche includes how a population responds to the abundance of its ... > more -
Ocean acidification
Ocean acidification is the name given to the ongoing decrease in the pH of the Earth's oceans, caused by their uptake of anthropogenic carbon dioxide from the atmosphere. Between 1751 and 2004 ... > more -
Nitrogen oxide
NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the oxygen in the air to produce ozone, which is also ... > more -
Zebra mussel
The Zebra mussel (Dreissena polymorpha) is a bivalve mussel native to freshwater lakes of southeast Russia. Zebra mussels are currently causing serious problems in North America and Sweden, where ... > more -
Environmental effects of fishing
Environmental impacts of fishing are the ecological changes brought about on the wider environment of the growth in global demand for fish as a food source, and to a lesser extent, for the aquarium ... > more
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