新疆北部地区湿地鼓藻类植物多样性及其与环境因子的关系
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国家自然科学基金(32160090,31560058)


Diversity of Desmids and Its Relationship with Environmental Factors in Wetlands of Northern Xinjiang
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    摘要:

    为了探究新疆北部主要地区(乌鲁木齐、阿勒泰、伊犁)湿地鼓藻类植物多样性分布规律及其特征,该研究通过文献查阅和标本采集鉴定等方式收集数据,采用GF指数方法进行物种多样性分析,利用Person相关分析和冗余分析(RDA)分析其与环境因子的关系,为新疆湿地鼓藻类植物资源的调查和淡水藻类多样性研究提供基本资料。结果表明:(1)研究区域共有鼓藻类植物189种,隶属于1门1纲2目6科18属;其中鼓藻科(Desmidiaceae)为优势科,有154种,占总种数的81.48%;优势属为鼓藻属(Cosmarium Corda ex Ralfs)、角星鼓藻属(Staurastrum Ralfs)和新月藻属(Closterium Nitzsch),共有137种,占总种数的72.49%。(2)阿勒泰地区鼓藻类植物的DFDGDFG值均最高,分别为2.6213、2.0828、0.5095。(3)研究区域鼓藻类植物的种类数量分布为:阿勒泰地区>乌鲁木齐及周边地区>伊犁地区,纬向因素的变化趋势较经向更明显。(4)Person相关分析显示,影响阿勒泰地区鼓藻类植物物种多样性的主要因子是大气温度,影响乌鲁木齐及周边地区是大气温度、电导率和经度,伊犁地区则与环境指标未显出相关性。(5)RDA分析表明, pH和大气温度是影响鼓藻类植物物种多样性和组成的主要因素。研究认为,新疆北部主要地区湿地鼓藻类植物存在较明显的地理分布差异,物种数呈现北多南少,东多西少的分布规律,其物种多样性和组成分布与环境因子存在一定的相关性,但不同地区、不同属类的鼓藻类植物与环境因子的相关性存在差异。

    Abstract:

    In order to explore the distribution and characteristics of Desmids diversity in the wetlands of major areas in northern Xinjiang (Urumqi, Altay and Ili), this study collected data through literature review, specimen collection and identification, and analyzed species diversity using GF index method. We used Person correlation analysis and redundancy analysis (RDA) to analyze its relationship with environmental factors, to provide basic information for the investigation of Desmids resources and the study of freshwater alga diversity in Xinjiang wetland. The results showed that: (1) there were 189 species of Desmids in the study area, belonging to 1 phylum, 1 class, 2 orders, 6 families and 18 genera; Desmidiaceae was the dominant family, with 154 species, accounting for 81.48% of the total species. The dominant genera were Cosmarium Corda ex Ralfs, Staurastrum Ralfs and Closterium Nitzsch, with 137 species, accounting for 72.49% of the total species. (2) The values of DF, DG and DF-G were the highest in Altay, which was 2.6213, 2.0828 and 0.5095, respectively. (3) The distribution of species and quantity of Desmids in the study area was as follows: Altay region > Urumqi and its surrounding areas > Ili Region, and the variation trend of zonal factors was more obvious than that of meridional factors. (4) The Person correlation analysis showed that the main factors affecting the diversity of Desmids species in Altay region were atmospheric temperature, and those affecting in Urumqi and its surrounding areas were atmospheric temperature, electrical conductivity and longitude. However, there was no correlation with environmental indicators in Ili region. (5) Redundancy analysis showed that pH and atmospheric temperature were the main factors affecting species diversity and composition of Desmids. Research suggests that major regions of the northern Xinjiang wetland Desmids is obvious geographical distribution differences, species present more in the north than in the south, and more in the east than in the west, species diversity and composition distribution and environmental factors have certain correlation, but in different areas, different genus of Desmids differences between the correlation of Desmids and environmental factors.

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王狄宁,艾克拜尔·依米提,吕海英.新疆北部地区湿地鼓藻类植物多样性及其与环境因子的关系[J].西北植物学报,2022,42(12):2123-2132

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  • 在线发布日期: 2023-01-15
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