留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码
扎西拉姆, 张驰, 王万良. 拉萨河下游周丛藻类群落结构特征及其与环境因子的关系[J]. 水生生物学报, 2023, 47(7): 1168-1177. DOI: 10.7541/2023.2022.0319
引用本文: 扎西拉姆, 张驰, 王万良. 拉萨河下游周丛藻类群落结构特征及其与环境因子的关系[J]. 水生生物学报, 2023, 47(7): 1168-1177. DOI: 10.7541/2023.2022.0319
TA SHILHAMO, ZHANG Chi, WANG Wan-Liang. PERIPHYTIC ALGAE COMMUNITY STRUCTURE AND RELATIONSHIP TO ENVIRONMENTAL FACTORS IN THE LOWER REACHES OF LHASA RIVER[J]. ACTA HYDROBIOLOGICA SINICA, 2023, 47(7): 1168-1177. DOI: 10.7541/2023.2022.0319
Citation: TA SHILHAMO, ZHANG Chi, WANG Wan-Liang. PERIPHYTIC ALGAE COMMUNITY STRUCTURE AND RELATIONSHIP TO ENVIRONMENTAL FACTORS IN THE LOWER REACHES OF LHASA RIVER[J]. ACTA HYDROBIOLOGICA SINICA, 2023, 47(7): 1168-1177. DOI: 10.7541/2023.2022.0319

拉萨河下游周丛藻类群落结构特征及其与环境因子的关系

PERIPHYTIC ALGAE COMMUNITY STRUCTURE AND RELATIONSHIP TO ENVIRONMENTAL FACTORS IN THE LOWER REACHES OF LHASA RIVER

  • 摘要: 为探究西藏拉萨河下游周丛藻类群落结构时空特征及其驱动因子分析, 研究于2018年2月(枯水期)、6月(平水期)、9月(丰水期)采用人工基质法对拉萨河下游进行3次周丛藻类群落结构调查。调查结果显示拉萨河下游共有周丛藻类7门53属104种, 优势度≥0.02的藻类有28种, 全部隶属于硅藻门。其中肘状针杆藻(Synedra ulna)、长等片藻(Diatom aelongatum)和中型脆杆藻(Fragilaria intermedia)为前三优势种。拉萨河下游周丛藻类年平均生物量为0.047 mg/cm2, 其中曲水县平均生物量最高(0.121 mg/cm2), 其次为尼玛江热乡(0.052 mg/cm2)和拉萨市(0.04 mg/cm2), 墨竹工卡县平均生物量最低(0.015 mg/cm2)。拉萨河下游周丛藻类生物量空间分布为: 曲水县>尼玛江热乡>拉萨市>阿朗乡>扎雪乡>达孜县>墨竹工卡县; 拉萨河下游周丛藻类丰度时间分布为: 平水期>丰水期>枯水期。水质评价结果显示上游3个采样点水质状况为轻度污染-清洁过度, 下游4个采样点水质状况为轻度污染-中污型过度。通过对周丛藻类群落参数与环境参数的典范对应分析显示, 大部分周丛藻类优势种与水温、流速和pH呈负相关性, 与总氮、溶解氧、电导率呈正相关性。研究为西藏拉萨河水生生物的多样性保护提供基础数据。

     

    Abstract: To understand the spatial and temporal dynamics of periphytic algae colony structure and its relationship with environmental factors in the lower reaches of Lhasa River in Tibet Autonomous Region, artificial matrix method was used to investigate the Periphytic algae community structure in the lower reaches of Lhasa River in February (dry season), June (normal season) and September (wet season). Results showed that 104 species belonging to 53 genera and 7 phyla of periplexus were identified, 28 species belonging to diatoms with dominance≥0.02. The first three dominant species were Synedra ulna, Diatom aelongatum and Fragilaria intermedia. The average annual biomass was 0.047 mg/cm2, and the highest was found in Qushui County (0.121 mg/cm2), followed by Nimajiangre Township (0.052 mg/cm2) and Lhasa City (0.04 mg/cm2), and the lowest was found in Mozhugongka County (0.015 mg/cm2). The spatial distribution of Periphytic algae biomass in the lower reaches of Lhasa River were Qushui County>Nimajiangre Township>Lhasa City>Alang Township>Zhaxue Township>Dazi County>Mozhugongka county. The temporal distribution of Periphytic algae abundance in the lower reaches of Lhasa River was as follows: normal season>wet season>dry season. The water quality assessment results showed that the water quality of the three sampling points in the upstream was slightly polluted to clean, and the water quality of the four sampling points in the downstream was slightly to moderately over polluted. The canonical correspondence analysis of periphyton community parameters and environmental parameters showed that most dominant species of periphyton were negatively correlated with water temperature, flow rate and pH, and positively correlated with total nitrogen, dissolved oxygen and electrical conductivity. The results of this survey provided the basic data for the conservation and scientific utilization of aquatic biodiversity in Lhasa River basin, Tibet Autonomous Region.

     

/

返回文章
返回