不同坡位对GPS项圈定位性能的影响

doi:10.16829/j.slxb.150594

兽类学报 ›› 2022, Vol. 42 ›› Issue (2): 204-210.DOI: 10.16829/j.slxb.150594

不同坡位对GPS项圈定位性能的影响

温惠^1,2, 袁学林¹, 曹引弟¹, 任国鹏^1,4, 黄志旁^1,2,4, 肖文^1,2,3,4

1 大理大学东喜玛拉雅研究院，大理 671003;
2 国际生物多样性与灵长类保护中心，大理 671003;
3 大理大学三江并流区域生物多样性保护与利用云南省创新团队，大理 671003;
4 中国三江并流区域生物多样性协同创新中心，大理 671003

收稿日期:2021-08-02 修回日期:2021-11-17 发布日期:2022-03-21
通讯作者: 任国鹏,E-mail:rengp@eastern-himalaya.cn;黄志旁,E-mail:huangzp@eastern-himalaya.cn
作者简介:温惠(1995-)，女，硕士研究生，主要从事保护生物学研究;袁学林(1998-)，男，本科生，主要从事生物学研究.
基金资助:
国家自然科学基金(31860164,31860168)；云南省人才计划(YNWR-QNBJ-2019-262)

Influence of topographic position on GPS collar performance in a mountainous region

WEN Hui^1,2, YUAN Xuelin¹, CAO Yindi¹, REN Guopeng^1,4, HUANG Zhipang^1,2,4, XIAO Wen^1,2,3,4

1 Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali 671003, China;
2 International Centre of Biodiversity and Primates Conservation, Dali 671003, China;
3 The Provincial Innovation Team of Biodiversity Conservation and Utility of the Three Parallel Rivers Region from Dali University, Dali 671003, China;
4 Collaborative Innovation Center for Biodiversity and Conservation in the Three Parallel Rivers Region of China, Dali 671003, China

Received:2021-08-02 Revised:2021-11-17 Published:2022-03-21

摘要/Abstract

摘要： GPS项圈已广泛应用于大中型野生动物的野外定位监测,支持野生动物生态学研究和保护管理规划。但由于地形等因素影响,GPS项圈返回的数据可能有定位误差和定位数据缺失偏歧。因此,在进行生境选择等相关生态学研究之前,应对GPS项圈的定位性能进行评估。本研究于2019年11月至2020年10月,在云南大理苍山5个测试点各静态放置2个GPS项圈,每个项圈收集1个月的数据,分析不同坡位(山谷、山脊和开阔地)对GPS项圈定位成功率、水平定位误差和定位精度的影响。结果表明:(1)GPS项圈定位成功率受坡位影响,山谷(21.7%,21.9%)和山脊(29.2%,37.8%)的定位成功率都显著低于开阔地(79.2%);(2)山谷定位误差高于山脊,并远高于开阔地;(3)山谷GPS项圈的定位精度最低(106.3m),山脊次之(40.9m),并远低于开阔地(7.3m)。地形不仅影响GPS项圈的定位成功率,而且影响水平定位误差和定位精度。因此,在山区使用GPS项圈进行野生动物监测时,应考虑到不同坡位定位成功率和定位误差的差异。特别是进行家域行为研究时,建议去除水平定位误差较大的点。

关键词: 定位成功率, 二维定位, 三维定位, 定位误差, 坡位, 定位精度

Abstract: Global Positioning System (GPS) collars have been widely used to monitor the movements of large mammals in the field.However,data collected by GPS collars are subject to two types of error:one is the location error,and another is the missing data bias.Therefore,the positioning performance of GPS collars should be evaluated and accounted for when designing relevant ecological studies such as habitat selection.To test the hypothesis that the positioning performance of the GPS collar is better on mountain ridges than that in valleys,we set two stationary points on the ridge and another two stationary points in the valley of Cangshan Mountain,Dali,Yunnan.All these four points were set up at the same altitude above sea level (approximate 2 600 m).In addition,to measure the performance of GPS collars under ideal conditions,we also placed two GPS collars over an open site.The positioning performance varied according to different topographic positions.First,the fix success rate ranged from 21.7% to 21.9% in the two valley points,increased to 29.2%-37.8% on the ridge points,and reached 79.2% in the open site.Second,the location errors of the valley points were much larger than those of the ridge points.The 50% circular error probable (CEP) of the 3D fixes were 21 m and 28 m at the valley points,13 m and 20 m at the ridge points,and 5 m at the open site.However,the 90% CEP of the 3D fixes were 843 m and 2 837 m at the valley points,95 m and 690 m at the ridge points,14 m at the open site.Third,the precision of GPS collars in the valley was 56.5 m and 106.3 m,while on the ridge of the mountain it was 21.6 m and 40.9 m,and only 7.3 m in the open site.Our results suggest that the performance of the GPS collar was severely influenced by the rugged terrain.Thus,it is essential to evaluate both the missing data bias and the location error of GPS fixes in mountainous regions before performing ecological analysis with the obtained GPS data.

Key words: Fix success rate, 2D fix, 3D fix, Location error, Topographic position, Location precision

中图分类号:

Q331

温惠, 袁学林, 曹引弟, 任国鹏, 黄志旁, 肖文. 不同坡位对GPS项圈定位性能的影响[J]. 兽类学报, 2022, 42(2): 204-210.

WEN Hui, YUAN Xuelin, CAO Yindi, REN Guopeng, HUANG Zhipang, XIAO Wen. Influence of topographic position on GPS collar performance in a mountainous region[J]. ACTA THERIOLOGICA SINICA, 2022, 42(2): 204-210.

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不同坡位对GPS项圈定位性能的影响

Influence of topographic position on GPS collar performance in a mountainous region

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