Using UAV remote sensing to analyze the population and distribution of large wild herbivores

Quanqin SHAO; Xingjian GUO; Yuzhe LI; Yangchun WANG; Dongliang WANG; Jiyuan LIU; Jiangwen FAN; Fan YANG

doi:10.11834/jrs.20187267

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Using UAV remote sensing to analyze the population and distribution of large wild herbivores
Vol. 22, Issue 3, Pages: 497-507(2018)
Received：29 June 2017，

Accepted：13 January 2018，

Published：2018-05
DOI： 10.11834/jrs.20187267
稿件说明：

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邵全琴, 郭兴健, 李愈哲, 汪阳春, 王东亮, 刘纪远, 樊江文, 杨帆. 2018. 无人机遥感的大型野生食草动物种群数量及分布规律研究. 遥感学报, 22(3): 497–507 DOI： 10.11834/jrs.20187267.

Shao Q Q, Guo X J, Li Y Z, Wang Y C, Wang D L, Liu J Y, Fan J W and Yang F. 2018. Using UAV remote sensing to analyze the population and distribution of large wild herbivores. Journal of Remote Sensing, 22(3): 497–507 DOI： 10.11834/jrs.20187267.

摘要

以黄河源玛多县为研究区，利用无人机分别于2017年冬春季开展了航拍调查，航拍有效面积达326.6 km

，获取影像23784张，建立了藏野驴、藏原羚、岩羊等野生动物，以及牦牛、藏羊和马等家畜的无人机图像解译标志库。通过人机交互方式解译，获取调查样带内的种群数量：藏野驴的样带密度为1.15只/km

，藏原羚为0.61只/km

，岩羊为0.62只/km

，家养牦牛为4.12只/km

，家养藏羊为7.34只/km

，马为0.06只/km

。利用冷暖季草场的估算方法，通过地面同步调查验证、统计数据验证，估算出玛多县藏野驴、藏原羚和岩羊，以及家牦牛、藏羊和马的种群数量为：藏野驴17109头，藏原羚15961只，岩羊9324只，牦牛70846头，藏羊102194只，马1156匹。大型野生食草动物藏野驴、藏原羚和岩羊总计8.57万羊单位；家畜藏羊、牦牛和马总计38.90万羊单位；大型野生食草动物和家畜总计47.5万羊单位。大型野生食草动物羊单位数量与家畜羊单位数量之比为1∶4.5。并分析了野生动物分布密度与栖息地生境因子的关系：藏野驴偏好选择高程4200—4400 m，坡度为2°—5°，离农村居民点距离1—2 km和4—5 km，离水源距离小于1 km，离公路距离2—3 km和4—5 km的范围内，草地盖度60—80%。藏原羚偏好选择高程4100—4200 m和4400—4500 m，坡度为大于5°，草地盖度80%以上，离农村居民点距离2—3 km，离水源距离小于1—2 km，离公路距离小于1—2 km和4—5 km的范围内。岩羊偏好选择高程4100—4200 m，坡度为大于5°，草地盖度较低，离农村居民点距离小于1 km，离水源距离小于1—2 km，离公路距离大于5 km的范围内。与传统的地面调查方法相比，基于无人机遥感的大型野生食草动物种群数量调查，具有快速、经济、可靠等优点，为今后野生动物调查提供了一种有效、可靠的技术途径。

Abstract

We used Unmanned Aerial Vehicles (UAVs) to conduct aerial surveys in the winter/spring of 2017 to determine the number and distribution of large wild herbivores and their effects on grassland ecosystems in Maduo County on the Qinghai–Tibet plateau. The effective area of the aerial surveys was 326.6 km

and 23784 images were acquired. Interpretation tag libraries for UAV images were set up for wild animals

including Kiang

Tibetan gazelle

and blue sheep

and for livestock

such as yaks

Tibetan sheep

and horses. The population in the survey transect was obtained via the interpretation of human–computer interaction. Statistical methods based on cold- and warm-season grasslands for estimating densities and numbers were compared and verified using a synchronized ground survey and statistical data. The population estimates for kiang

Tibetan gazelle

blue sheep

domestic yak

Tibetan sheep

and horses were 17109

15961

9324

70846

102194

and 1156

respectively. The densities ranged from 1.15/km

for kiang

0.61/km

for Tibetan gazelle

and 0.62/km

for blue sheep to 7.34/km

for domestic sheep. The ratio of large wild herbivores in sheep units to livestock in sheep units was 1∶4.5. The relationship between the distribution density of wild animals and the ecological factors of the habitat was analyzed. Kiangs preferred elevations of 4200 m to 4400 m

slopes of 2° to 5°

and grass cover of 60% to 80%. Tibetan gazelles preferred elevations of 4100 m to 4200 m or 4400 m to 4500 m

slopes of more than 5°

and grass cover of more than 80%. Blue sheep preferred elevations of 4100 m to 4200 m

slopes of more than 5°

and low grass cover. All wild species preferred areas that were close to water and far from roads. Compared with traditional ground survey methods

UAV remote sensing surveys of large wild herbivore populations are fast

economical

and reliable

and they provide an effective means to survey wild animals in the future.

关键词

Keywords

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