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Definition
| UPWELLING Flowing of cold, deep water to the surface. Happens where surface currents diverge. |
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| EXTIRPATION disappearance of a particular population from a given area, but not the entire species globally. |
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| Threatened species [image] |
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Definition
| THREATENED SPECIES Threatened species are any species which are vulnerable to endangerment in the near future. |
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| TERATOGEN Toxicant that causes harm to the unborn. |
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| ASBETOS A heat-resistant fibrous silicate mineral that can be woven into fabrics, used in fire-resistant and insulating materials. |
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| HEAT ISLAND An urban heat island (UHI) is a metropolitan area which is significantly warmer than its surrounding rural areas. |
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Term
| Seed-tree approach[image] |
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Definition
| SEED-TREE APPROACH Timber harvesting approach that leaves small numbers of mature and vigorous seed-producing trees standing so they could re-seed a logging area. |
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| Shelterwood approach[image] |
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Definition
| SHELTERWOOD APPROACH Timber harvesting approach that leaves small amounts of mature trees in place to give shelter to seedlings as they grow. |
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| BEDROCK Solid rock underlying loose deposits; foundation |
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| SOIL HORIZON A layer in a soil profile. |
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| SOIL PROFILE A vertical section of soil from the ground surface to the parent rock. |
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| LOAM A soil with roughly equal proportions of sand, silt, and clay |
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| INTERCROPPING Grow (a crop) among plants of a different kind, usually in the space between rows |
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Definition
| COVER CROP A crop grown for the protection and enrichment of the soil. |
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| SHELTER BELT Windbreak: hedge or fence of trees designed to lessen the force of the wind and reduce erosion. |
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