Modeling vegetation mosaics in sub-alpine Tasmania under various fire regimes

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• 作者：Gabriel I. Yospin ; Samuel W. Wood ; Andres Holz…
• 关键词：Athrotaxis ; Buttongrass moorland ; Cradle Mountain ; Lake St Clair National Park ; Ecological modeling ; Fire ecology ; Paleoecology
• 刊名：Modeling Earth Systems and Environment
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：1
• 期：3
• 全文大小：5970KB
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• 作者单位：Gabriel I. Yospin (1) <br> Samuel W. Wood (2) <br> Andres Holz (3) <br> David M. J. S. Bowman (2) <br> Robert E. Keane (4) <br> Cathy Whitlock (1) (5) <br><br>1. Institute on Ecosystems, Montana State University, 106 AJM Johnson Hall, Bozeman, MT, 59717-3490, USA <br> 2. Plant Science, University of Tasmania, Private Bag 55, Hobart, TAS, 7001, Australia <br> 3. Department of Geography, Portland State University, Portland, OR, 97207-0751, USA <br> 4. USDA Forest Service, Rocky Mountain Research Station, Missoula Fire Sciences Laboratory, Missoula, MT, 59807, USA <br> 5. Department of Earth Sciences, Montana State University, 226 Traphagen Hall, Bozeman, MT, 59717-3480, USA <br>
• 刊物类别：Earth System Sciences; Math. Appl. in Environmental Science; Statistics for Engineering, Physics, Co
• 刊物主题：Earth System Sciences; Math. Appl. in Environmental Science; Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences; Mathematical Applications in the Physical Sciences; Ec
• 出版者：Springer International Publishing
• ISSN：2363-6211

文摘

Western Tasmania, Australia contains some of the highest levels of biological endemism of any temperate region in the world, including vegetation types that are conservation priorities: fire-sensitive rainforest dominated by endemic conifer species in the genus Athrotaxis; and fire-tolerant buttongrass moorlands. Current management focuses on fire suppression, but increasingly there are calls for the use of prescribed fire in flammable vegetation types to manage these ecosystems. The long-term effects of climate and alternative management strategies on the vegetated landscape are unknown. To help identify controls over successional trajectories, we parameterized a spatially explicit landscape-scale model of vegetation and fire (FireBGCv2) for a study area in Cradle Mountain-Lake St Clair National Park in western Tasmania using new data on fine-scale topography, plant communities, and fuels loads. Our parameterized model displays a high level of agreement with previous empirical and modeling studies for the region. The model was experimentally tested for three different levels of ignition suppression (0, 50, and 90 %); simulations ran for 1000 years and were replicated 10 times. The different scenarios yielded distinct fire return intervals, with cascading effects on successional dynamics and vegetation composition. Model results indicate that fire-sensitive endemic conifer rainforest will be restricted to upland refugia that total far less area than its present distribution, even under maximal ignition suppression. Because the distribution of vegetation types was unstable temporally and across stochastic replicates, present distributions may be a legacy of previous climate, Aboriginal fire management, or both. Keywords Athrotaxis Buttongrass moorland Cradle Mountain-Lake St Clair National Park Ecological modeling Fire ecology Paleoecology