这种植物能长到15米高，改变了水文和营养物质的平衡而从根本上改变了森林组成结构。
It can grow up to 15 meters tall and is "fundamentally changing" the forest architecture, he says, altering the hydrology and nutrient balance.
山核桃树皮的皮层均由9 - 12层富含营养物质的薄壁细胞组成，其机械性能在一定程度上影响着树皮对溃疡病抗性。
The cortex of bark was consist of 9-12 layer nutrient element parenchyma so its mechanical capability have influence on the resistance to the disease.
外生菌根真菌与很多植物形成互利共生关系， 在营养物质交换和碳循环等方面起着关键性的作用，是森林生态系统的重要组成部分。
Ectomycorrhizal ( EcM) fungi form mutualistic symbioses with many tree species and are regarded as key organisms involved in nutrient and carbon cycling in forest ecosystems .
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