The Sand Fixation Buffer Function of Wetland and Case Analysis of It's Regional Role in the Semi-Arid Areas
Natural and anthropogenic factors have combined to exacerbate the rates of soil desertification and land degradation,posing significant challenges to ecological security and sustainable land management.Natural and artificial barriers play a beneficial role in stabilizing shifting sands and mitigating desertification,while the sand fixation buffer function of wetlands has received limited attention.This study aims to fill this gap by exploring the crucial role of wetlands in intercepting and settling transported sand and dust.Wetlands,characterized by their unique combination of vegetation,water,and soils,act as natural sand traps.Through the synergistic interaction of these components,wetlands effectively capture and retain sand particles,preventing their further dispersal and accumulation in adjacent areas.Taking the wetland in the western Songnen Plain as an example,we underscore the ecological significance of wetland sand fixation buffers in a re-gion particularly vulnerable to desertification.The higher soil sand content in this area compared to the east underscores the critical need for effective sand fixation measures.The integration of wetland open water sur-faces with dense vegetation creates a powerful sand trap,further emphasizing the indispensable role of wetland groups in halting desertification's relentless expansion.
desertificationwetlandssand fixation buffer functionsemi-arid region
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