词条 | Nurse tree |
释义 |
A nurse tree is a larger, faster-growing tree that shelters a small, slower-growing tree or plant. The nurse tree can provide shade, shelter from wind, or protection from animals who would feed on the smaller plant. For example, the Norway Spruce (Picea abies) and Larch (Larix) can function as a nurse for hardwoods.[1] In the Sonoran desert, Palo Verde, Ironwood or mesquite trees serve as nurse trees for young saguaro cacti. As the Saguaro grows and becomes more acclimated to the desert sun, the older tree may die, leaving the saguaro alone. In fact, as the Saguaro grows larger it may compete for resources with its nurse tree, hastening its death. Consequently, young saguaros are often seen near trees, but old saguaros are not.[2] References1. ^Northern Ireland, Planning Service Website. A Design Guide for Rural Northern Ireland. Appendix 3: Tree Species. 2. ^National Park Service. How Saguaros Grow.
2 : Trees|Forest ecology |
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。