arctic ecosystems meaning in English

北极生态系统

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。