{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,16]],"date-time":"2026-02-16T09:59:00Z","timestamp":1771235940560,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2018,7,2]],"date-time":"2018-07-02T00:00:00Z","timestamp":1530489600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41571504"],"award-info":[{"award-number":["41571504"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41501416"],"award-info":[{"award-number":["41501416"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2017YFC0506501"],"award-info":[{"award-number":["2017YFC0506501"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Major Science and Technology Project of Qinghai Province","award":["2015-SF-A4-1"],"award-info":[{"award-number":["2015-SF-A4-1"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>We used unmanned aerial vehicles (UAVs) to carry out a relatively complete population census of large wild herbivores in Maduo County on the Tibetan Plateau in the spring of 2017. The effective area covered by aerial surveys was 326.6 km2, and 23,784 images were acquired. Interpretation tag libraries for UAV images were created for wild animals, including Kiang (Equus kiang), Tibetan gazelle (Procapra picticaudata), and blue sheep (Pseudois nayaur), as well as livestock, including yaks and Tibetan sheep. Large wild herbivores in the survey transect were identified through manual imagery interpretation. Densities ranged from 1.15\/km2 for Kiang, 0.61\/km2 for Tibetan gazelle, 0.62\/km2 for blue sheep, 4.12\/km2 for domestic yak, and 7.34\/km2 for domestic sheep. A method based on meadows in the cold and warm seasons was used for estimating the densities and numbers of large wild herbivores and livestock, and was verified against records of livestock numbers. Population estimates for Kiang, Tibetan gazelle, blue sheep, domestic yak, and domestic sheep were 17,109, 15,961, 9324, 70,846, and 102,194, respectively. Based on published consumption estimates, the results suggest that domestic stock consume 4.5 times the amount of vegetation of large wild herbivores. Compared with traditional ground survey methods, performance of UAV remote sensing surveys of large wild herbivore populations was fast, economical and reliable, providing an effective future method for surveying wild animals.<\/jats:p>","DOI":"10.3390\/rs10071041","type":"journal-article","created":{"date-parts":[[2018,7,2]],"date-time":"2018-07-02T10:56:52Z","timestamp":1530529012000},"page":"1041","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":43,"title":["Application of UAV Remote Sensing for a Population Census of Large Wild Herbivores\u2014Taking the Headwater Region of the Yellow River as an Example"],"prefix":"10.3390","volume":"10","author":[{"given":"Xingjian","family":"Guo","sequence":"first","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"},{"name":"University of Chinese Academy of Sciences, Beijing 101407, China"}]},{"given":"Quanqin","family":"Shao","sequence":"additional","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"},{"name":"University of Chinese Academy of Sciences, Beijing 101407, China"}]},{"given":"Yuzhe","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"}]},{"given":"Yangchun","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Mountain Hazards and Environment, CAS, Chengdu 610000, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1377-8394","authenticated-orcid":false,"given":"Dongliang","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"}]},{"given":"Jiyuan","family":"Liu","sequence":"additional","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"}]},{"given":"Jiangwen","family":"Fan","sequence":"additional","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"}]},{"given":"Fan","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute of Geographic Sciences and Natural Resources Research, Key Laboratory of Land Surface Patterns and Simulation, CAS, Beijing 100101, China"},{"name":"University of Chinese Academy of Sciences, Beijing 101407, China"}]}],"member":"1968","published-online":{"date-parts":[[2018,7,2]]},"reference":[{"key":"ref_1","first-page":"364","article-title":"Grassland degradation in the \u201cThree-River Headwaters\u201d region, Qinghai Province","volume":"64","author":"Liu","year":"2008","journal-title":"Acta Geogr. Sin."},{"key":"ref_2","first-page":"317","article-title":"Summer Habitat Selection of the Ungulates Equus kiang and Bos grunniens in Altun Mountain Reserve","volume":"49","author":"Wu","year":"2014","journal-title":"Chin. J. Zool."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1071\/WR07075","article-title":"Aerial mark\u2013recapture estimates of wild horses using natural markings","volume":"35","author":"Dawson","year":"2008","journal-title":"Wildl. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"310","DOI":"10.1071\/WR07080","article-title":"Aerial surveys of multiple species: critical assumptions and sources of bias in distance and mark\u2013recapture estimators","volume":"35","author":"Melville","year":"2008","journal-title":"Wildl. Res."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"320","DOI":"10.1071\/WR07078","article-title":"A comparison of mark\u2013recapture distance-sampling methods applied to aerial surveys of eastern grey kangaroos","volume":"35","author":"Fewster","year":"2008","journal-title":"Wildl. Res."},{"key":"ref_6","first-page":"5632","article-title":"Distribution and population status of Macaca mulatta in Shaanxi Micangshan National Reserve","volume":"35","author":"Zhao","year":"2015","journal-title":"Acta Ecol. Sin."},{"key":"ref_7","first-page":"832","article-title":"Dynamic of Vegetation in the Altun Mountain Nature Reserve Based on SPOT NDVI","volume":"31","author":"Liu","year":"2014","journal-title":"Arid Zone Res."},{"key":"ref_8","first-page":"141","article-title":"Effects of land use\/land cover change (LUCC) on habitats of Tibetan wild donkey in Aerjin Mountain Nature Reserve","volume":"33","author":"Su","year":"2014","journal-title":"Chin. J. Ecol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2160","DOI":"10.1016\/j.rse.2007.09.012","article-title":"Evaluating MODIS data for mapping wildlife habitat distribution","volume":"112","author":"Bearer","year":"2008","journal-title":"Remote Sens. Environ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1111\/j.1469-7998.2006.00077.x","article-title":"Satellite tracking of Mongolian gazelles (Procapra gutturosa) and habitat shifts in their seasonal ranges","volume":"269","author":"Ito","year":"2006","journal-title":"J. Zool."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/S0006-3207(00)00090-2","article-title":"Population trends of resident wildebeest [Connochaetes taurinus hecki, (Neumann)] and factors influencing them in the Masai Mara ecosystem, Kenya","volume":"97","author":"Ottichilo","year":"2001","journal-title":"Biol. Conserv."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"461","DOI":"10.1016\/j.biocon.2007.03.005","article-title":"Savanna herbivore dynamics in a livestock-dominated landscape: I. Dependence on land use, rainfall, density, and time","volume":"137","author":"Georgiadis","year":"2007","journal-title":"Biol. Conserv."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1111\/j.1523-1739.2007.00705.x","article-title":"Assessment of Effectiveness of Protection Strategies in Tanzania Based on a Decade of Survey Data for Large Herbivores","volume":"21","author":"Stoner","year":"2007","journal-title":"Conserv. Biol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"99","DOI":"10.1111\/j.1469-7998.2011.00818.x","article-title":"Continuing wildlife population declines and range contraction in the Mara region of Kenya during 1977\u20132009","volume":"285","author":"Ogutu","year":"2011","journal-title":"J. Zool."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1139\/juvs-2015-0021","article-title":"Wildlife research and management methods in the 21st century: Where do unmanned aircraft fit in?","volume":"3","author":"Chabot","year":"2015","journal-title":"J. Unmanned Veh. Syst."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1111\/mam.12046","article-title":"Are unmanned aircraft systems (UASs) the future of wildlife monitoring? A review of accomplishments and challenges","volume":"45","author":"Linchant","year":"2015","journal-title":"Mammal Rev."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1002\/wsb.629","article-title":"Visible and thermal infrared remote sensing for the detection of white-tailed deer using an unmanned aerial system","volume":"40","author":"Chretien","year":"2016","journal-title":"Wildl. Soc. Bull."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Vermeulen, C., Lejeune, P., Lisein, J., Sawadogo, P., and Bouch\u00e9, P. (2013). Unmanned aerial survey of elephants. PLoS ONE, 8.","DOI":"10.1371\/journal.pone.0054700"},{"key":"ref_19","first-page":"289","article-title":"Characteristic of Land Cover Changes in the Yellow River Headwaters Region over the Past 30 Years","volume":"13","author":"Bing","year":"2011","journal-title":"Geo-Inf. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1708","DOI":"10.1007\/s11434-011-4477-0","article-title":"Soil erosion rates and characteristics of typical alpine meadow using 137Cs technique in Qinghai-Tibet Plateau","volume":"56","author":"Shao","year":"2011","journal-title":"Chin. Sci. Bull."},{"key":"ref_21","first-page":"12","article-title":"Spatial-temporal Analysis of Soil Erosion in Grassland over the Past Three Decades in Sanjiangyuan Region, Qinghai Province, China","volume":"13","author":"Huang","year":"2011","journal-title":"Geo-Inf. Sci."},{"key":"ref_22","first-page":"1547","article-title":"Grassland Cover Change near the Source of the Yellow River: Case Study of Madoi County, Qinghai Province","volume":"30","author":"Zhang","year":"2008","journal-title":"Resour. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1007\/s11442-017-1371-y","article-title":"Effects of an ecological conservation and restoration project in the Three-River Source Region, China","volume":"27","author":"Shao","year":"2017","journal-title":"J. Geogr. Sci."},{"key":"ref_24","first-page":"35","article-title":"Target-based Assessment on Effects of First-stage Ecological Conservation and Restoration Project in Three-river Source Region, China and Policy Recommendations","volume":"32","author":"Quanqin","year":"2017","journal-title":"Bull. Chin. Acad. Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"71","DOI":"10.17520\/biods.2016098","article-title":"Functional zoning and target management of Sanjiangyuan National Park","volume":"25","author":"Fu","year":"2017","journal-title":"Biodivers. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"109","DOI":"10.17520\/biods.2014128","article-title":"Effectiveness of line transects during wild animal surveys in mountain forests of South China","volume":"23","author":"Tian","year":"2015","journal-title":"Biodivers. Sci."},{"key":"ref_27","first-page":"113","article-title":"Mannalian Status and Conservation in Yeniugou, Qinghai, China","volume":"16","author":"Harris","year":"1996","journal-title":"Acta Therigl. Sin."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"E5716","DOI":"10.1073\/pnas.1719367115","article-title":"Automatically identifying, counting, and describing wild animals in camera-trap images with deep learning","volume":"115","author":"Norouzzadeh","year":"2018","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_29","unstructured":"Pabico, J.P., Gonzales, A.M.V., Villanueva, M.J.S., and Mendoza, A.A. (2015). Automatic Identification of Animal Breeds and Species Using Bioacoustics and Artificial Neural Networks. Comput. Sci., Available online: https:\/\/arxiv.org\/abs\/1507.05546."},{"key":"ref_30","unstructured":"State Forestry Administration (2009). Investigation on Key Terrestrial Wildlife Resources in China."},{"key":"ref_31","first-page":"4277","article-title":"Summer feeding and bedding habitat selection by blue sheep (Pseudois nayaur) in Helan Mountains","volume":"28","author":"Liu","year":"2008","journal-title":"Acta Ecol. Sin."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"423","DOI":"10.1016\/j.mambio.2016.04.001","article-title":"Field metabolic rate, movement distance, and grazing pressures by western grey kangaroos (Macropus fuliginosus melanops) and Merino sheep (Ovis aries ) in semi-arid Australia","volume":"81","author":"Munn","year":"2016","journal-title":"Mamm. Biol."},{"key":"ref_33","first-page":"1","article-title":"Research Progress of Grassland Feed-animal Balance at Home and Abroad","volume":"29","author":"Mai","year":"2013","journal-title":"Chin. Agric. Bull."},{"key":"ref_34","first-page":"64","article-title":"An Analysis of Temporal-spatial Dynamics of Grazing Pressure on Grassland in Three Rivers Headwater Region","volume":"33","author":"Fan","year":"2011","journal-title":"Chin. J. Grassl."},{"key":"ref_35","first-page":"1998","article-title":"Monitoring and evaluation of grassland-livestock balance in pastoral and semi-pastoral counties of China","volume":"31","author":"Xu","year":"2012","journal-title":"Geogr. Res."},{"key":"ref_36","first-page":"2190","article-title":"Series of studies on balance control between animal demanding and feed availability (3)\u2014Improvement of the current estimation methods for animal-feed balance","volume":"28","author":"Li","year":"2011","journal-title":"Pratacult. Sci."},{"key":"ref_37","first-page":"1111","article-title":"Optimization strategy and management decision-masking in balancing forage and livestock in Gannan pastoral area","volume":"31","author":"Liang","year":"2011","journal-title":"Acta Ecol. Sin."},{"key":"ref_38","first-page":"367","article-title":"Natural Grassland Productivity and the Livestock-Feeds Balance in Qinghai Province","volume":"34","author":"Li","year":"2012","journal-title":"Resour. Sci."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.ecoleng.2015.06.031","article-title":"Human-induced grassland degradation\/restoration in the central Tibetan Plateau: The effects of ecological protection and restoration projects","volume":"83","author":"Cai","year":"2015","journal-title":"Ecol. Eng."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"407","DOI":"10.2111\/08-104.1","article-title":"New Approaches and Tools for Grazing Management","volume":"62","author":"Laca","year":"2009","journal-title":"Rangel. Ecol. Manag."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1186\/s13717-017-0087-3","article-title":"Understanding livestock production and sustainability of grassland ecosystems in the Asian Dryland Belt","volume":"6","author":"Qi","year":"2017","journal-title":"Ecol. Process."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"571","DOI":"10.1007\/s10661-009-1258-1","article-title":"Assessment of effects of climate change and grazing activity on grassland yield in the Three Rivers Headwaters Region of Qinghai-Tibet Plateau, China","volume":"170","author":"Fan","year":"2010","journal-title":"Environ. Monit. Assess."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/7\/1041\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:10:57Z","timestamp":1760195457000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/7\/1041"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,7,2]]},"references-count":42,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2018,7]]}},"alternative-id":["rs10071041"],"URL":"https:\/\/doi.org\/10.3390\/rs10071041","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,7,2]]}}}