定義： A wetland that features permanent inundation of large areas of land by shallow bodies of water, generally with a substantial number of hummocks, or dry-land protrusions.
定義： A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
定義： The gnawing and biting-off of small fragments of tissue, whether from plants or dead invertebrates. [ https://www.worldcat.org/search?q=bn%3A0-412-40180-0 ]
