Distribution of Barnacle Geese Branta leucopsis in Relation to Food Resources, Distance to Roosts, and the Location of Refuges

Ardea

Tiejun Wang⁴  Henk van der Jeugd²  Andrew K. Skidmore⁴  Albertus G. Toxopeus⁴  Yali Si¹  Martin Schlerf⁴  Susan Zwerver⁵  Willem F. de Boer³  Mandy Oudshoorn⁵ 

[1] 1 Faculty of Geo-information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands 2 Resource Ecology Group, Wageningen University, 6708 PB Wageningen, The Netherlands;4 SOVON Dutch Centre for Field Ornithology, P.O. Box 6521, 6503 GA Nijmegen, The Netherlands 5 Present address: Vogeltrekstation Dutch Centre for Avian Migration and Demography (NIOO-KNAW), P.O. Box 40, 6666 ZG Heteren, The Netherlands;2 Resource Ecology Group, Wageningen University, 6708 PB Wageningen, The Netherlands;1 Faculty of Geo-information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;3 van Hall-Larenstein, P.O. Box 1528, 8901 BV Leeuwarden, The Netherlands

关键词: Spatial Lag Model;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

WeusedGPSsatellitetrackingdataandfieldmeasurementsofvegetationtoinvestigatetheeffectoffoodresources,distancetoroosts,andthelocationofrefugesonthedistributionofBarnacleGeeseBrantaleucopsisinthenorthernpartofTheNetherlands.Todealwithspatialdependenceamongthedata,aspatiallagmodelwasused.Asignificantquadraticeffectwasfoundbetweenswardheightandgoosedistribution,indicatingthatgeesepreferpatcheswithintermediateswardheights.Themanipulationofswardheightcanthereforebeusedtoattractgeesetorefugesandthusreducegoosegrazinginagriculturalland.Norelationshipwasfoundbetweengrassnitrogencontentandgrazingintensity,indicatingthatgeesedonotdistinguishbetweenareasbasedonnitrogencontent.Ahighergrazingintensitywasobservedinareaslocatedwithin2kmfromroosts.Theeighttrackedgeesespent80%oftheirforagingtimeinrefuges,demonstratingtheimportanceoftherefugesystem.

【 授权许可】

Unknown