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3.4 & 3.5 Science
Term | Definition |
---|---|
wetland | land consisting of marshes or swamps; saturated land. |
bog | wet muddy ground too soft to support a heavy body |
swamp | n area of low-lying, uncultivated ground where water collects; a bog or marsh. |
marsh | an area of low-lying land that is flooded in wet seasons or at high tide, and typically remains waterlogged at all times. |
emergent wetlands | characterized by erect, rooted, herbaceous hydrophytes, excluding mosses and lichens. |
heterotrophs | an organism deriving its nutritional requirements from complex organic substances. |
drought | a prolonged period of abnormally low rainfall; a shortage of water resulting from this. |
drought watch – | intended to alert government agencies, public water suppliers, water users and the public regarding the onset of conditions indicating the potential for future drought-related problems |
drought warning | complements coordinated response to imminent drought conditions and potential water supply shortages |
drought emergency | a concentrated management phase designed to marshal all available resources to respond to actual emergency conditions |