| 荒漠地区柠条种实害虫对寄主斑块质量与格局的反应 |
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| 作者姓名： | Zhang DZ He DH |
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| 作者单位： | 1. 宁夏大学生命科学学院,银川,750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,银川,750021
2. 宁夏大学农学院,银川,750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,银川,750021 |
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| 基金项目： | 国家自然科学基金项目(30760045); 宁夏自然科学基金项目(NZ0707,NZ0926)资助 |
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| 摘 要： | 以宁夏中东部荒漠区为景观背景,选择人工固沙次生林地、流动风积沙地和沙壤土质丘陵地3种生境类型共18块天然或人工种植的柠条林斑块,研究了柠条豆象、豆荚螟和柠条种子小蜂3种柠条种实害虫对寄主植物斑块质量、斑块面积和空间格局的反应.结果显示:3种柠条种实害虫对寄主植物的为害率与斑块质量、斑块格局和昆虫自身迁移能力有关.对斑块质量的反应受到斑块尺度大小的影响,在不同的生境类型间,种实害虫的为害率差异显著(P<0.05),以人工固沙次生林地的为害率最高,其次为沙壤土质丘陵地,流动风积沙地相对较低.在小斑块格局中,柠条种实害虫数量的发生与寄主植物斑块的面积、破碎化程度存在一定的相关性,斑块面积减少、生境破碎化程度增加能够降低移动能力较强的豆荚螟(r=0.365)的为害率,而对移动能力较弱的柠条豆象(r=0.160)、柠条种子小蜂(r=0.193)则没有明显影响.斑块边缘效应强度和景观斑块周边资源互补对种群密度具有正相关的影响.
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| 关 键 词： | 荒漠景观 生境破碎化 斑块质量 斑块格局 种实害虫 柠条 |
Responses of Caragana seed pests to host plant patch quality and patch pattern in desert regions of Ningxia, Northwest China |
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| Zhang DZ,He DH.Responses of Caragana seed pests to host plant patch quality and patch pattern in desert regions of Ningxia, Northwest China[J].Chinese Journal of Applied Ecology,2011,22(7):1871-1877. |
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| Authors: | Zhang Da-zhi He Da-han |
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| Institution: | ZHANG Da-zhi1,3,HE Da-han2,3(1School of Life Science,Ningxia University,Yinchuan 750021,China,2School of Agronomy,3Ministry of Education Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China,China) |
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| Abstract: | Taking the desert landscape in mid-eastern Ningxia of Northeast China as the background,eighteen patches of Caragana shrub lands(natural or manned) with the habitat types of manually-fixed sandy land,mobile sandy land,and silty-loam downland were selected as study sites to investigate the responses of three Caragana seed pest species(Kytorhinus immixtus,Etiella zinckenella,and Bruchophagus neocaraganae) to the host plant patch quality,patch area,and patch spatial pattern.The damaged rate of host plant by th... |
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| Keywords: | desert landscape habitat fragmentation patch quality patch pattern seed pests Caragana |
| 本文献已被 CNKI 万方数据 PubMed 等数据库收录！ |
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