Responses of biodiversity in northern forest ecosystems to global warming

为了检验北方森林生态系统是否会对全球变暖做出反应，我进行了变暖实验和沿着纬度梯度的大规模研究。变暖的实验表明，变暖增加了林冠树木的白桦（早期的退化阶段的物种），但减少了橡树栎crispula（晚期的退化阶段的物种）的植食性。同样，大规模的研究表明，一个橡树Qercus锯缘青冈和山毛榉毛豆，这两个都是晚期的阶段物种，草食性下降向低纬度。这些结果表明，林冠树木植食性对全球变暖的反应取决于寄主植物的生长阶段。

To examine whether northern forest ecosystems might respond to global warming, I conducted warming experiments and large-scale studies along a latitudinal gradient. The warming experiments showed that warming increased herbivory in canopy trees of a birch Betula ermanii (early succesional stage species) but decreased herbivory of an oak Quercus crispula (late succesional stage species). Similarly, the large-scale studies showed that herbivory of an oak Qercus serrata and a beech Fagus crenata, both of which are late succesional stage species, decreased toward low latitudes. These results suggest an implication that the responses of herbivory in canopy trees to global warming depend on succesional stages of host plants.