| insects | Insects are a class, insecta, of arthropoda whose members are characterised by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth, several hundred thousand different kinds having been described. They have lived on earth for about 350 million years, as compared with less than 2 million for man. While insects are often commercially valuable and useful as scavengers, many species are harmful, causing enormous losses in agriculture and storage. Three orders, hemiptera, diptera, and siphonaptera, are of medical interest in that they cause disease in man and animal. (12 Dec 1998) |
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| aquatic | <ecology, marine biology> Living in or on water for all or a substantial part of the life span (generally restricted to fresh water or inland waters). (09 Oct 1997) |
| aquatic plant | <botany> Plants that must grow in water whether rooted in the mud or floating without anchorage, plants that must complete part or all of their life cycle in or near the water. (09 Oct 1997) |
| aquatic root | <plant biology> Roots that develop on stems above the normal position occupied by roots, in response to prolonged inundation with water. (09 Oct 1997) |
| shaded riverine aquatic cover | Near-shore aquatic area occurring at the interface between a stream and adjacent woody habitat. (09 Oct 1997) |
| special aquatic site | Those sites identified in 40 CRF 230, Subpart E (i.e., sanctuaries and refuges, wetlands, mud flats, vegetated shallows, coral reefs, and riffle and pool complexes). They are geographic areas, large or small, possessing special ecological characteristics of productivity, habitat, wildlife protection, or other important and easily disrupted ecological values. These areas are generally recognised as significantly influencing or positively contributing to the general overall environmental health or vitality of the entire ecosystem of a region. Source: Environmental Protection Agency, 40 CFR |
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