Cypermethrin insecticide residue, water quality and phytoplankton diversity in the lychee plantation catchment area

IF 1.6 Q4 ENVIRONMENTAL SCIENCES
Jirapa Wongsa, Ramita Liamchang, Neti Ngearnpat, Kritchaya Issakul
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引用次数: 0

Abstract

Lychee plantation areas are typically located at varying elevations on mountains to ensure proper drainage. This placement has direct effects on stream and river water flows and consequently influences pesticide residue, water quality and aquatic biodiversity. This research aims to examine the relationships between cypermethrin residue, water quality and phytoplankton diversity in the lychee plantation catchment area in Phayao Province, Thailand, from January to May 2022. The study area was divided into six sampling sites. Water samples were collected for the investigation of cypermethrin residual, physicochemical and biological water quality parameters. The water quality index was used as an overall measurement of water quality. The study also examined the diversity of phytoplankton species and the relationship among cypermethrin residue, water quality and phytoplankton diversity were studied using canonical correspondence analysis. The findings revealed an increasing trend of cypermethrin residue, with the maximum concentration reaching 29.43 mg/L in March. The trend of decreasing water quality scores from Station S1 to Station S5 indicated the influence of land use changes and human activities, especially in the community area (S5), which was characterized by deterioration of water quality. A total of 174 phytoplankton species were categorized into 5 divisions, with Chlorophyta accounting for 61.49% of the total, followed by Bacillariophyta (28.16%) and Cyanophyta (6.32%). The highest Shannon's diversity index and evenness were observed at Stations S3 and S4, respectively. The canonical correspondence analysis revealed an interesting relationship among cypermethrin residue, ammonia nitrogen, chlorophyll a and three algal species: Pediastrum simplex var. echinulatum, Pediastrum duplex var. duplex and Scenedesmus acutus at Station S3. This research implies that pesticide residue and water quality have a direct impact on phytoplankton distribution, illustrating the environmental challenges that occur in various geographical areas. This information can be applied to assist in the development of future sustainable land use management initiatives.

荔枝种植集水区氯氰菊酯杀虫剂残留、水质及浮游植物多样性
& lt; abstract>荔枝种植区通常位于不同海拔的山上,以确保适当的排水。这种布置对溪流和河流水流有直接影响,从而影响农药残留、水质和水生生物多样性。本研究旨在研究2022年1 - 5月泰国帕瑶省荔枝种植集水区氯氰菊酯残留量与水质和浮游植物多样性之间的关系。研究区分为6个采样点。采集水样,调查氯氰菊酯残留量及理化、生物水质参数。采用水质指数作为水质的综合衡量指标。利用典型对应分析方法,研究了氯氰菊酯残留量与水质、浮游植物多样性之间的关系。氯氰菊酯残留量呈上升趋势,3月份最高达到29.43 mg/L。从S1站到S5站,水质得分呈下降趋势,表明受土地利用变化和人类活动的影响,特别是在社区区(S5),水质表现出恶化的特征。浮游植物共174种,共分为5个纲,其中绿藻纲占61.49%,硅藻纲占28.16%,蓝藻纲占6.32%。Shannon多样性指数和均匀度分别在S3和S4站点最高。典型对应分析表明,氯氰菊酯残留、氨氮、叶绿素a与3种藻类<italic>Pediastrum simplex</italic>var. <italic>echinulatum</italic>; <var。& lt; italic> duplex< / italic>and <italic>Scenedesmus acutus</italic>在S3站。该研究表明,农药残留和水质对浮游植物的分布有直接影响,说明了不同地理区域发生的环境挑战。这些资料可用于协助制订未来可持续的土地使用管理措施。& lt; / abstract>
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来源期刊
AIMS Environmental Science
AIMS Environmental Science ENVIRONMENTAL SCIENCES-
CiteScore
2.90
自引率
0.00%
发文量
31
审稿时长
5 weeks
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