Diversity and Ecology of Non-diatomic Algae in the Middle Hilla River, Iraq

IF 0.4 Q4 ENVIRONMENTAL SCIENCES Asian Journal of Water, Environment and Pollution Pub Date : 2023-05-25 DOI:10.3233/ajw230039

N. F. Kadhim, Adi Jassim Abd Al-Rezzaq

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Abstract

The present study aimed to investigate the non-diatomic algae community and some biodiversity indices in the Hilla River during the study period from October 2018 to July 2019 for three sites along the Hilla River. Physicochemical parameters of water quality assessment and the phytoplankton population is measured using a sedimentation technique identified mainly using some diagnostic sources. Where a total of (48) genera and (100) species were diagnosed, belonging to 5 classes as follows: Chlorophyceae (23 genera, 59 species), Cyanophyceae (16 genera, 30 species), Dinophyceae (4 genera and 4 species), Chrysophyceae (3 genera, 5 species) and Euglenophyceae (2 genera and 2 species). The highest and low values recorded for biodiversity were (1.9 and 2.9) at site 3 and 1, respectively, while the richness index ranged between 43 and 48, and the highest value for numerical Evenness Index was (0.77) at site 3 and the lowest values (0.51) at site 1 and 2, Simpson dominance index has recorded the highest value (0,272) at site 1 and 2 and the lowest values was (0.122) at site 3. Canonical Correspondence Analysis (CCA) was used to estimate the relationship between environmental factors and algae, water temperature (water temp.) salinity, pH, chloride, and alkalinity were important factors influencing the distribution of phytoplankton community.

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伊拉克希拉河中部非双原子藻类的多样性和生态学

本研究旨在调查希拉河沿岸3个站点2018年10月至2019年7月期间希拉河非双原子藻类群落及其部分生物多样性指数。水质评价的理化参数和浮游植物种群的测量采用沉降技术，主要由一些诊断源确定。其中共鉴定出藻类48属100种，分属5纲:绿藻科23属59种，蓝藻科16属30种，藻科4属4种，绿藻科3属5种，裸藻科2属2种。丰富度指数在43 ~ 48之间，均匀度指数在3点最高(0.77)，在1点和2点最低(0.51)，Simpson优势度指数在1点和2点最高(0.272)，在3点最低(0.122)。采用典型对应分析(Canonical Correspondence Analysis, CCA)分析了环境因子与藻类的关系，水温(水温)、盐度、pH、氯化物和碱度是影响浮游植物群落分布的重要因素。

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来源期刊

Asian Journal of Water, Environment and Pollution ENVIRONMENTAL SCIENCES-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Asia, as a whole region, faces severe stress on water availability, primarily due to high population density. Many regions of the continent face severe problems of water pollution on local as well as regional scale and these have to be tackled with a pan-Asian approach. However, the available literature on the subject is generally based on research done in Europe and North America. Therefore, there is an urgent and strong need for an Asian journal with its focus on the region and wherein the region specific problems are addressed in an intelligent manner. In Asia, besides water, there are several other issues related to environment, such as; global warming and its impact; intense land/use and shifting pattern of agriculture; issues related to fertilizer applications and pesticide residues in soil and water; and solid and liquid waste management particularly in industrial and urban areas. Asia is also a region with intense mining activities whereby serious environmental problems related to land/use, loss of top soil, water pollution and acid mine drainage are faced by various communities. Essentially, Asians are confronted with environmental problems on many fronts. Many pressing issues in the region interlink various aspects of environmental problems faced by population in this densely habited region in the world. Pollution is one such serious issue for many countries since there are many transnational water bodies that spread the pollutants across the entire region. Water, environment and pollution together constitute a three axial problem that all concerned people in the region would like to focus on.