Zone p2 : there appeared two peaks of the concentration of arboreal and shrubby pollens and in arboreal and shrubby pollens the percent of pollens of deciduous broadleaf trees is comparatively high 33 ，且以蒿、蔡为主；木本（乔木和灌木）植物花粉含量为8 33上89 ，浓度也很低，仅为0
2.
But as the tundra becomes shrubbier and as the soil becomes drier in the summer as a result of higher temperatures , the balance could swing back the other way , because plants , particularly woody ones , will fix more carbon and lock it back into the arctic ecosystem 但当苔原长了小树，土壤也因为夏季较高的温度而变得乾燥时，平衡可能荡向另一个方向，因为植物（尤其是木本植物）会固定更多的碳，将其锁回北极生态系里。
