尼日尔三角洲巴耶尔萨州埃皮溪极端洪水中的鱼类多样性

S. Ngodigha
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摘要

近年来,洪水在尼日尔三角洲引起了极大的关注,促成了这项研究。该研究是为了调查2022年10月尼日尔三角洲极端洪水中鱼类物种的多样性。在5个采样点随机采集个体渔民上岸的样本,按物种水平进行分类和鉴定。采用Shannon-Wiener多样性指数H'和Simpson多样性指数D来估计多样性。据此分析了站点间的丰富度R、均匀度E和相似性。结果显示,R值为4.255 ~ 4.535,E值为0.789 ~ 0.899,H值为1.734 ~ 1.974。Simpson’s指数D介于0.162 ~ 0.226之间,Simpson’s多样性指数1-D介于0.774 ~ 0.838之间。站间最高相似值为0.286。研究结果表明,在2022年10月的洪水期间,这条小溪经历了一个稳定的系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fish Diversity in Extreme Flood in Epie Creek, Bayelsa State, Niger delta
Floods have been of great concern in the Niger Delta in the recent years, precipitating this study. The research was conducted to investigate diversity of fish species in the October 2022 extreme flood in the Niger Delta. Samples were collected randomly from landings of artisanal fishers in five sample locations, sorted and identified to species level. Diversity was estimated using Shannon-Wiener's diversity H' and Simpson's diversity D indices. Richness R, Evenness E and Similarity between stations were analyzed accordingly. From the results, R was from 4.255-4.535, E was 0.789 to 0.899 and H’ 1.734-1.974. Simpson’s index D was between 0.162 and 0.226, while Simpson’s index of diversity 1-D was from 0.774 to 0.838. Highest similarity value between stations was 0.286. Results from the study indicate the creek experienced a stable system during the October 2022 flood.
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