| 荒漠草原不同土壤条件下猪毛蒿幼苗种群的点格局分析 |
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| 引用本文： | 李月飞,陈林,李学斌,张义凡,苏莹.荒漠草原不同土壤条件下猪毛蒿幼苗种群的点格局分析[J].生态学报,2019,39(17):6273-6281. |
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| 作者姓名： | 李月飞 陈林 李学斌 张义凡 苏莹 |
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| 作者单位： | 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;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地, 银川 750021;宁夏大学西部生态与生物资源开发联合研究中心, 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;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地, 银川 750021;宁夏大学西部生态与生物资源开发联合研究中心, 银川 750021,宁夏大学科学技术处, 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;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地, 银川 750021;宁夏大学西部生态与生物资源开发联合研究中心, 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;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地, 银川 750021;宁夏大学西部生态与生物资源开发联合研究中心, 银川 750021 |
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| 基金项目： | 宁夏高等学校一流学科建设（生态学）项目（NXYLXK2017B06）；宁夏自然科学基金重点项目（NZ17005）；国家重点研发计划（2016YFC0500709）资助 |
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| 摘 要： | 采用摄影定位法测定了宁夏荒漠草原3种不同土壤条件下猪毛蒿（Artemisia scoparia）幼苗种群的空间格局，并应用完全空间随机模型、泊松聚块模型和嵌套双聚块模型对其分布格局进行了分析。结果表明：（1）在灰钙土生境下，猪毛蒿幼苗种群在小尺度上（0-2.85m）表现为聚集分布，随着尺度的增大先呈现为随机分布（2.85-3.75 m），然后又呈现为均匀分布（3.75-5m）；在风沙土生境下，猪毛蒿幼苗种群在0-1.85 m之间表现为聚集分布，在1.85-2.35 m之间表现为随机分布，当尺度大于2.35 m时表现为均匀分布；而基岩风化残积土上的猪毛蒿幼苗种群在整个尺度上均呈现随机分布。（2）猪毛蒿种群幼苗在基岩风化残积土上符合泊松聚块模型，即猪毛蒿种群空间格局的聚块中不存在较高密度的小聚块；而在风沙土和灰钙土上则符合嵌套双聚块模型，即在大聚块中分布较高密度的小聚块。猪毛蒿幼苗种群空间格局的形成与土壤异质性存在着密切的联系，种群在空间中分布格局的形成机制可以通过种群空间格局的分析加以解释。
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| 关 键 词： | 荒漠草原 猪毛蒿 摄影定位法 点格局 零模型 |
| 收稿时间： | 2018/4/23 0:00:00 |
| 修稿时间： | 2019/4/4 0:00:00 |
Point pattern analysis of an Artemisia scoparia seedling population under different soil conditions in a desert steppe |
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| LI Yuefei,CHEN Lin,LI Xuebin,ZHANG Yifan and SU Ying.Point pattern analysis of an Artemisia scoparia seedling population under different soil conditions in a desert steppe[J].Acta Ecologica Sinica,2019,39(17):6273-6281. |
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| Authors: | LI Yuefei CHEN Lin LI Xuebin ZHANG Yifan and SU Ying |
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| Institution: | Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, China;Western Joint Research Center for Ecology and Biological Resources Development, Ningxia University, Yinchuan 750021, China,Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, China;Western Joint Research Center for Ecology and Biological Resources Development, Ningxia University, Yinchuan 750021, China,Science and Technology Department, Ningxia University, Yinchuan 750021, China,Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, China;Western Joint Research Center for Ecology and Biological Resources Development, Ningxia University, Yinchuan 750021, China and Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, China;Western Joint Research Center for Ecology and Biological Resources Development, Ningxia University, Yinchuan 750021, China |
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| Abstract: | The spatial pattern of an Artemisia scoparia seedling population under three different soil conditions in the Ningxia desert steppe was determined by a photography positioning method. Its distribution pattern was analysed by using a complete spatial random model, a Poisson block model and a nested bipartite block model. The results show that (1) in the calcareous soil, the population of A. scoparia seedlings occurred on a small scale (0-2.85 m) while A. scoparia seedlings in the calcareous soil and sandy soil showed an aggregated distribution, with the increase in the size of the first presenting a random distribution (2.85-3.75 m), and then presenting a uniform distribution (3.75-5 m).In the aeolian sandy soil, the A. scoparia seedling population showed an aggregated distribution between 0-1.85 m, a random distribution between 1.85-2.35 m, and a uniform distribution when the scale was larger than 2.35 m. However, the population of A. scoparia seedlings in the weathered residual soil of bedrock showed a random distribution on nearly the entire scale and, (2) the seedlings of A. scoparia fit a Poisson cluster on weathered residual soil of bedrock meaning that there were no high-density small aggregations in the aggregation of the spatial pattern of the A. scoparia population. However, the seedlings of A. scoparia in aeolian sandy soil and calcareous soil fit the nested double-cluster, meaning that the small clumps with higher density were distributed in the large clumps. The formation of the spatial pattern of A. scoparia seedlings is closely related to soil heterogeneity and the formation mechanism of the spatial distribution pattern of A. scoparia seedlings can be explained by the analysis of the spatial pattern of the population. |
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| Keywords: | Desert steppe A scoparia photographic positioning method point pattern zero model |
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