The influence of coastal squeeze on blue carbon function and its threshold
With the risk increasing of climate change and anthropogenic disturbance,the threat of coastal squeeze to coastal wetlands has been widely concerned by many disciplines.Blue carbon plays an important role in adaptation to global climate change.However,the response process and critical influence area of blue carbon function to coastal squeeze are not revealed.Based on the theoretical framework of the effect of coastal squeeze on blue carbon function,we select the northern Liaodong Bay for empirical analysis.Landsat images,digital elevation data and carbon storage data were used to assess and explore the characteristics of response between coastal squeeze and blue carbon in different periods.Our study showed that the area of higher coastal squeeze risk and lower blue carbon function decreased first and then increased,but these trends were different on both sides of the Liaohe River significantly from 1995 to 2020.During the study period,the response relationship of blue carbon to coastal squeeze appeared an inverse U-form in the northern Liaodong Bay.When the coastal squeeze index exceeded 0.214,the carbon sink capacity of coastal wetland decreased significantly,and when the coastal squeeze index exceeded 0.311,the decline trend was alleviated.Due to imbalance of economic development and ecological protection,the contradiction between coastal squeeze and blue carbon is prominent in coastal industrial parks.Strengthening the protection and restoration of similar regions can improve the adaptability of climate change and promote sustainable development of coastal zones.Our results can provide scientific basis and management reference for the research and practice of coastal squeeze and blue carbon balance in coastal wetlands.
blue carboncoastal squeezeecological thresholdcoastal wetlandcoastal resilience
万方数据
维普
