| 报告题名: | Habitat use of wild Reindeer (Rangifer t.tarandus) in Hardangervidda, Norway |
| 作者: | Falldorf, Tobias
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| 出版者: | Norsk institutt for naturforskning
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| 出版年: | 2013
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| 发表日期: | 2013
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| 国家: | 挪威
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| 语种: | 英语
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| 英文关键词: | NINA Rapport
; habitat selection
; remote sensing
; lichen biomass
; anthropogenic disturbance
; rangifer
; habitat seleksjon
; fjernmåling
; lavbiomasse
; antropogen forsyrrelse
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| 中文主题词: | 生物量
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| 主题词: | BIOMASS
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| 英文摘要: | As a migratory species living in the (sub-)arctic reindeer are highly sensitive to the effects of
habitat fragmentation, cumulated human disturbance and climate change. In a rapidly changing
environment a better understanding of their habitat use is therefore crucial for the longterm
conservation of wild reindeer and in order to improve management plans. In this thesis I
present research on the habitat selection of wild reindeer (Rangifer t. tarandus) in Hardangervidda,
Norway, focusing on (A) how seasonal differences in distribution and movement
patterns of wild reindeer can be described and quantified (chapter 2), (B) how the land cover
of the alpine study area can be classified accurately using selected parametric and nonparametric
classifiers on satellite imagery with and without ancillary data (chapter 3), (C)
how the current status of lichen pastures can be mapped and quantified (chapter 4) and (D)
how reindeer habitat selection can be modeled at different temporal and spatial scales (chapter
5).
To answer question (A), 28 wild, female reindeer in Hardangervidda were equipped with
global positioning system collars (GPS). Based on the recorded tracking data, a method is
presented to detect and define annual seasons empirically (floating cut-off points within correlated
random walks (CRW) models). Reindeer are shown to perform seasonal migrations
within the study area and the underlying movement patterns are described and quantified using
multiple parameters (directionality and regularity of movement, activity level and
size/stability of seasonal home range). Significant seasonal differences in movement patterns
are detected and related to (potential) underlying factors (climate, differences in spatial distribution
of resources between seasons, human disturbance and social behaviour of reindeer).
Answering question (B), a method for land cover classification within a mountainous area is
proposed based on Landsat imagery and ancillary data (DEM and derivates, images from different
seasons). Relevant land cover classes for resource selection of wild reindeer are defined
and the study area is classified accordingly. The kNN classifier demonstrates superior results
as compared to maximum likelihood and decision tree classifiers. It is shown, that the use of
ancillary data can significantly improve the overall classification accuracies for all tested
classifiers and the class accuracies of the vast majority of classes. |
| URL: | https://brage.bibsys.no/xmlui/bitstream/handle/11250/2397707/982.pdf?sequence=3&isAllowed=y
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/28397
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 982.pdf（26593KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Falldorf, Tobias. Habitat use of wild Reindeer (Rangifer t.tarandus) in Hardangervidda, Norway. 2013-01-01.
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