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Satellite-derived models of available vegetation nutrition: projected impacts of climate change on critical grizzly bear food resources in Alberta

可用植被营养的卫星衍生模型：气候变化对艾伯塔省关键灰熊食物资源的预计影响

基本信息

批准号：
405774-2011
负责人：
Laskin, David
金额：
$ 3.64万
依托单位：
University of Calgary
依托单位国家：
加拿大
项目类别：
Vanier Canada Graduate Scholarships - Doctoral
财政年份：
2012
资助国家：
加拿大
起止时间：
2012-01-01 至 2013-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=515609
关键词：
Satellite derived models available vegetation

项目摘要

Grizzly bears (Ursus arctos) are a threatened species in Alberta due to their decreasing population numbers. Understanding the impact of climatic influences on grizzly habitat is a serious management concern, especially considering the temporal brevity and spatial limitations of optimal vegetation forage sites. Plant life-cycle events such as flowering and fruiting are one of the most responsive and easily observed characteristics in nature impacted by changing climate. This study incorporates a network of remote time-lapse cameras and meteorological stations to monitor the life-cycle developments of critical bear food plants in the Rocky Mountains of Alberta. Observations will be used to develop satellite-derived nutritional landscape maps that will show the timing and abundance of vegetation consumed by grizzly bears. Predictive models will be used to forecast the potential impacts of climate change on nutritional scarcity, and the effects on grizzly bear populations. Validating the models will occur through laboratory analysis, by growing bear food plants in climate simulation chambers that replicate changing environmental conditions such as temperature and atmospheric gases. Shifts in the timing of plant life-cycles due to climate change may have serious consequences for grizzly bears, and other species that depend on periodically available resources.

灰熊（Ursus arctos）是阿尔伯塔省的濒危物种，因为它们的种群数量正在减少。了解气候对灰熊栖息地的影响是一个严重的管理问题，特别是考虑到最佳植被饲料地点的时间短暂性和空间局限性。植物的开花和结果等生命周期事件是受气候变化影响最敏感、最容易观察到的自然特征之一。这项研究结合了一个由远程延时摄像机和气象站组成的网络，以监测阿尔伯塔落基山脉关键熊食植物的生命周期发展。观测结果将用于开发卫星衍生的营养景观地图，该地图将显示灰熊消耗植被的时间和数量。预测模型将用于预测气候变化对营养短缺的潜在影响，以及对灰熊种群的影响。验证这些模型将通过实验室分析进行，通过在气候模拟室中种植熊食植物来复制不断变化的环境条件，如温度和大气气体。由于气候变化导致的植物生命周期时间的变化可能对灰熊和其他依赖周期性可用资源的物种造成严重后果。