Schramm Ulrich
II. Zoologisches Institut Erlangen, Germany.
Oecologia. 1972 Dec;9(4):399-402. doi: 10.1007/BF00345342.
Constant low temperature and poorly digestible food hinder growth of herbivorous insects. This may be one of the reasons which exclude poikilothermic herbivores from the high arctic tundra (in contrast to high alpine ecosystems).
持续的低温和难以消化的食物阻碍了食草昆虫的生长。这可能是变温食草动物无法在高北极冻原生存（与高海拔高山生态系统不同）的原因之一。
