Impact of Nypa Palm (Nypa fruticans Wurmb) and Mangroves Forest on Benthic Macro Invertebrate Community in Andoni River, Nigeria

IF 0.3
U. O. Emoyoma, Aroloye O. Numbere, G. N. Woke
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引用次数: 3

Abstract

It is postulated that the presence of nypa palm (Nypa palm) in mangrove forest affect the reproductive function of fish by inhibiting the growth of macro invertebrates. The impact of Nypa fruticans (Wurmb) and mangroves on the benthic macro invertebrate community of Andoni River was carried out between January and August, 2017. A total of four stations were chosen based on nypa palm and native mangrove species’ presence and absence, station 1 (Open water), Station 2 (Nypa palm dominance), station 3 (Rhizophora and Avicennia dominance), Station 4 (Mixed). Results of water quality parameters include; pH 6.99±0.16, Temperature 28.20±0.05°C, DO 4.71±0.18mg/L, Conductivity 19.52±0.20µm/s, Salinity 10.76±0.07ppt, TDS 13.45±0.27ppt. Mean values of the physico-chemical parameters (P > 0.05) were not significantly different. Twelve taxa of benthic macro-invertebrates in eleven families were collected. The crustaceans were more in diversity (38.46%), while bivalvia, pisces and oligochaete had the least percentage composition (7.69%). The gastropods were more in species dominance (44.69%), while the Oligochaeta were least in abundance (0.61%). Shannon Weiner’s index across the stations for benthos was highest in station 2 (1.840) and lowest in station 1 (1.103). Simpson’s index was highest in station 2 (1.990) and lowest in station 1 (1.938). Pielou’s index of evenness was highest in station 2 (0.767) and lowest in station 1 (0.616). All the macro-invertebrates recorded were clean water and pollution tolerant species, and showed no significant difference across stations (P>0.05). In conclusion this study indicates that nypa palm does not affect the proliferation of macro invertebrates, which supports fishery population along the food chain.
尼帕棕榈和红树林对尼日利亚安多尼河底栖大型无脊椎动物群落的影响
研究认为,红树林中存在的nypa palm (nypa palm)通过抑制大型无脊椎动物的生长来影响鱼类的生殖功能。本研究于2017年1 - 8月对安多尼河底栖大型无脊椎动物群落的影响进行了研究。根据红树和本地红树物种的存在和缺失,共选择4个站点,分别是站1(开阔水域)、站2(红树优势)、站3(根草和黄花优势)和站4(混合)。水质参数计算结果包括:pH 6.99±0.16,温度28.20±0.05℃,DO 4.71±0.18mg/L,电导率19.52±0.20µm/s,盐度10.76±0.07ppt, TDS 13.45±0.27ppt。理化参数均值差异无统计学意义(P < 0.05)。收集了底栖大型无脊椎动物11科12个分类群。甲壳类生物多样性最高(38.46%),双壳类、双鱼类和寡毛类生物多样性最低(7.69%)。腹足类的优势度最高(44.69%),寡毛纲的优势度最低(0.61%)。底栖动物的Shannon Weiner指数以站2最高(1.840),站1最低(1.103)。2号工位Simpson指数最高(1.990),1号工位最低(1.938)。2号站的Pielou均匀度指数最高(0.767),1号站最低(0.616)。所记录的大型无脊椎动物均为耐水、耐污染物种,各站点间差异不显著(P < 0.05)。综上所述,本研究表明,nypa棕不影响大型无脊椎动物的增殖,而这些无脊椎动物在食物链上支持着渔业种群。
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来源期刊
International Letters of Natural Sciences
International Letters of Natural Sciences MULTIDISCIPLINARY SCIENCES-
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