利用地理信息系统和统计方法评估印度西孟加拉邦恒河洪泛平原湿地沉积物的物理化学特性

IF 3.3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Frontiers in Environmental Science Pub Date : 2024-08-29 DOI:10.3389/fenvs.2024.1397715

Basanta Kumar Das, Ajoy Saha, Archan Kanti Das, Purna Chandra, Kausik Mondal, Tania Kayal, Sangeeta Chakraborty, Shreya Bhattacharya, Bigan Kumar Sahoo, Chayna Jana

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引用次数: 0

摘要

引言底层沉积物在湿地生产力中发挥着关键作用，本文研究了印度恒河洪泛平原的 8 个湿地，以评估沉积物的物理化学特征和质地分析。方法分析了在季风和非季风季节从每个湿地采集的沉积物样本。结果与讨论在整个研究期间，pH 值（6.90-8.04）、EC 值（0.20-1.64 dS/m）、CaCO3（1.75%-14.50%）、可利用氮（10.22-22.23 毫克/100 克沉积物）、总氮（80.4-333.8 毫克/100 克沉积物）、可利用磷（0.20-5.61 毫克/100 克沉积物）和总磷（19.63-173.33 毫克/100 克沉积物）。不同湿地的沉积物质量参数差异很大（p> 0.05）。仅在总氮和总磷含量方面观察到季节性变化。沉积物以沙子为主。湿地沉积物养分（C、N 和 P）的化学计量学显示，C/P（5.96-66.32）比值相对较高，C/N（3.34-22.76）和 N/P（1.12-9.25）比值较低，这表明沉积物的物理化学特征受到人为来源的影响。主成分分析表明了自然和人为原因对湿地生态系统的影响。地理信息系统（GIS）插值法与实验室分析方法相结合，对每个湿地的沉积物质量进行了完整的空间解析。研究表明，这些湿地的沉积物质量有利于鱼类养殖，但需要适当的管理方法才能实现可持续生产。由于这是首次对这些湿地沉积物的物理化学特性进行监测，因此这项研究可作为基线数据，供今后对湿地进行环境评估时进行比较。

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Assessment of the physicochemical properties of the sediment from the Gangetic floodplain wetlands of West Bengal, India, with GIS and a statistical approach

IntroductionBottom sediments play a pivotal role in wetland productivity, and here, eight Gangetic floodplain wetlands of India were studied to assess the sediment physicochemical characteristics and textural analysis.MethodsSediment samples that were collected from each wetland in monsoon and non-monsoon seasons were analysed. ANOVA, Principal component analysis and multiple correlation analysis were used for statistical analysis.Results and DiscussionThroughout the study period, pH (6.90–8.04), EC (0.20–1.64 dS/m), CaCO3 (1.75%–14.50%), available nitrogen (10.22–22.23 mg/100 g sediment), total nitrogen (80.4–333.8 mg/100 g sediment), available phosphorus (0.20–5.61 mg/100 g sediment), and total phosphorus (19.63–173.33 mg/100 g sediment) were recorded. The sediment quality parameters differ significantly (p > 0.05) among the wetlands. Seasonal variation was only observed on total nitrogen and total phosphorus contents. Sediments were dominated by sand. Sediment nutrient (C, N, and P) stoichiometry of wetlands depicted a comparatively little higher C/P (5.96–66.32) ratio and lower C/N (3.34–22.76) and N/P (1.12–9.25) ratios, which revealed that the physicochemical characteristics of the sediments are influenced by anthropogenic sources. Principal component analysis showed the influence of both natural and anthropogenic causes on wetland ecosystems. The geographic information system (GIS) interpolation approach was used in combination with laboratory analysis methods to give a complete spatial resolution of the sediment quality of each wetland. The study suggests that these wetlands’ sediment quality is favorable for fish culture but requires proper management practices to achieve sustainable production. As it is the first time where monitoring physicochemical properties of sediments of these wetlands are presented, this study can be used as a baseline data for comparison in future environmental assessments of the wetlands.

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来源期刊

Frontiers in Environmental Science Environmental Science-General Environmental Science

CiteScore

4.50

自引率

8.70%

发文量

2276

审稿时长

12 weeks

期刊介绍： Our natural world is experiencing a state of rapid change unprecedented in the presence of humans. The changes affect virtually all physical, chemical and biological systems on Earth. The interaction of these systems leads to tipping points, feedbacks and amplification of effects. In virtually all cases, the causes of environmental change can be traced to human activity through either direct interventions as a consequence of pollution, or through global warming from greenhouse case emissions. Well-formulated and internationally-relevant policies to mitigate the change, or adapt to the consequences, that will ensure our ability to thrive in the coming decades are badly needed. Without proper understanding of the processes involved, and deep understanding of the likely impacts of bad decisions or inaction, the security of food, water and energy is a risk. Left unchecked shortages of these basic commodities will lead to migration, global geopolitical tension and conflict. This represents the major challenge of our time. We are the first generation to appreciate the problem and we will be judged in future by our ability to determine and take the action necessary. Appropriate knowledge of the condition of our natural world, appreciation of the changes occurring, and predictions of how the future will develop are requisite to the definition and implementation of solutions. Frontiers in Environmental Science publishes research at the cutting edge of knowledge of our natural world and its various intersections with society. It bridges between the identification and measurement of change, comprehension of the processes responsible, and the measures needed to reduce their impact. Its aim is to assist the formulation of policies, by offering sound scientific evidence on environmental science, that will lead to a more inhabitable and sustainable world for the generations to come.