腾格里沙漠东南缘人工固沙植被演替地面节肢动物群落多样性分布特征
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宁夏自然科学基金重点项目(2020AAC02014);国家自然科学基金(41867005);宁夏重点研发计划项目(2021BEG03007);宁夏科技创新团队项目(2021RXTDLX01)


Distribution of ground-active arthropod community diversity during the succession of artificial sand-fixing vegetation in the southeastern Tengger Desert
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Key Program and Natural Science Foundation of Ningxia.The National Natural Science Foundation of China.Key Research and Development Program of Ningxia. Science and Technology Innovation Team Project of Ningxia.

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    摘要:

    在腾格里沙漠东南缘选取2、5、8、34 a和57 a的不同年限人工固沙植被区为研究样地,以流动沙地为对照,利用陷阱诱捕法调查了不同样地地面节肢动物的群落组成及多样性特征,阐明了固沙植被区地面节肢动物多样性对植被演替的响应规律。结果表明:(1)此次调查共获得地面节肢动物15685头,隶属于15目40科44个类群。随固沙年限的增加,地面节肢动物优势类群数基本无变化,常见类群数和稀有类群数分别增加了0.5-2.5倍和0.25-2.75倍;捕食性、植食性和杂食性地面节肢动物类群数均呈上升趋势,分别增加了0.5-3倍、0.2-4.2倍和0.3-1.67倍。(2)地面节肢动物总个体数表现为8 a和57 a固沙植被区显著高于流动沙地(P<0.05),分别是流沙地的3.85倍和3.03倍;类群数和多样性指数均表现为57 a和34 a固沙植被区显著高于其他年限固沙植被区(P<0.05),且57 a固沙植被区地面节肢动物类群数显著高于34 a固沙植被区(P<0.05)。(3)草本植物密度、土壤有机碳和灌木高度是影响固沙植被区地面节肢动物群落组成及多样性分布的主要因子,解释率分别为48.1%、25.2%和9.1%。草本密度、土壤有机碳与地面节肢动物个体数、类群数和多样性指数均呈显著正相关(P<0.05);灌木高度与地面节肢动物个体数呈显著正相关,与类群数和多样性指数呈显著负相关(P<0.05)。综上所述:地面节肢动物对固沙植被不同演替阶段环境条件的选择和适应性不同。流动沙地经人工固沙后,可以提高地面节肢动物的多样性,且34 a固沙时间是地面节肢动物多样性保持相对稳定的关键时间节点。

    Abstract:

    In this study, we selected the 2-year, 5-year, 8-year, 34-year and 57-year artificial sand-fixing vegetation area in the southeastern Tengger Desert as study sites, and the mobile sand land was used as the control. The community composition and the diversity characteristics of ground-active arthropods in the revegetated areas of different years were investigated by using pitfall trapping method. Combined with environmental factors, we clarified the response of ground-active arthropod diversity to vegetation succession in the revegetated areas. The results showed that:(1) a total of 15685 ground-active arthropods were obtained in this study, belonging to 15 orders, 40 families and 44 groups. Alongside the succession of the revegetated areas, there was no significant change of the number of dominant groups, whereas the number of common groups and rare groups increased by 0.5-2.5, 0.25-2.75, respectively, in comparison to the mobile sand land. And the number of the predatory, herbivorous and omnivorous groups increased by 0.5-3.0, 0.2-4.2 and 0.3-1.67, respectively. (2) Alongside the succession of revegetated areas, the total abundance of ground-active arthropods in 8-year and 57-year revegetated area was significantly higher than that in mobile sand land (P<0.05), and increased by 3.85 and 3.03, respectively. There were significantly higher number of groups and diversity index of ground-active arthropods in 57-year and 34-year revegetated area than that in other sites, with the peak in 57-year revegetated area (P<0.05). The number of groups of ground-active arthropods was found to be significantly higher in 57-year revegetated area compared with 34-year revegetated area (P<0.05). (3) Herb density, soil organic carbon and shrub height were the main environmental factors driving the community composition and diversity of ground-active arthropods in the revegetated areas. Their contribution rate was 48.1%, 25.2% and 9.1%, respectively. Herb density and soil organic carbon had significantly positive correlation with the total abundance, the number of groups and the diversity index of ground-active arthropods (P<0.05). Shrub height showed significantly positive correlation with the total abundance, and significantly negative correlation with the number of groups and the diversity index of ground-active arthropods (P<0.05). In conclusion, there were different adaptabilities of ground-active arthropods to environmental conditions in the revegetated areas. It suggested that the revegetated plantations could improve the diversity of ground-active arthropods, and 34 years of revegetated plantations was the key time node for biodiversity conservation and desertification control in desertification region.

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杨敏,刘任涛,曾飞越,吉雪茹,方进,赵文智.腾格里沙漠东南缘人工固沙植被演替地面节肢动物群落多样性分布特征.生态学报,2024,44(1):428~439

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