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The effect of invasive annual plants on wildfire suppression costs.

機譯：一年生入侵植物對抑制野火成本的影響。

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摘要

The problems posed by the role of invasive plants on changing wildfire regimes is considered to be the greatest threat to the ecological integrity of the Great Basin sagebrush steppe of the western U.S. Ecological changes that occur because of these problems threaten the economic and social fabric of rural communities throughout the region. The rest of the nation is affected by these changes through the increasing costs of wildfire suppression that is covered by federal land management agencies. The cost of wildfire suppression has increased at an increasing rate over the last several decades; to the point where funds that would have been used for preventative fuel management programs are being diverted to cover expenditures of wildfire fighting. Preventative fuel treatment is an effort such as thinning of brush and young trees, herbicidal treatment of invasive grasses, controlled fires to reduce fuel loads, and other actions to reduce the probability that a wildland fire will be a catastrophic wildfire that results in further expansion of invasive grasses, losses to ecological integrity, and more frequent wildfires. The trade-off between preventative fuel treatment efforts and wildfire fighting expenditures is generally well understood in principle. However, in practice, the feedback that continues to result in increasing wildfire costs continues. At this time there is little information about the benefits of preventative fuel treatment efforts. One category of benefits is in reducing the expected value of wildfire suppression expenditures. The purpose of this research is to develop a model to estimate the wildfire suppression cost savings from management actions intended to reduce fuel loadings from invasive plants in the Great Basin.;Wildfire suppression cost is estimated using historical data from the US Forest Service regarding the costs of large wildfires on Great Basin lands managed by the Forest Service and the Bureau of Land Management between 1995 and 2007. These data include vegetation type and condition. This information along with an index of fire danger rating is used to construct an index of weighted fuel types. This is used in a regression model to estimate wildfire suppression costs as a function of vegetation type, resulting in the marginal wildfire suppression cost contribution for each given vegetation type. The regression coefficients on vegetation type are used with treatment success rates and wildfire event probabilities to conduct a cost savings analysis for a 200 year period. Public land managers can utilize processes of this type to determine how limited resources can be allocated to maximize cost savings. The framework developed is highly adaptable and can be used to analyze impacts of other activities such as ranching, recreation, and development.
機譯：外來入侵植物在不斷變化的野火狀況中的作用所構成的問題被認為是對美國西部大盆地鼠尾草草原生態完整性的最大威脅，由于這些問題而發生的生態變化威脅著農村的經濟和社會結構。整個地區的社區。聯邦土地管理機構支付的野火撲滅費用增加，這些變化影響了美國其他地區。在過去的幾十年中，抑制野火的成本以越來越高的速度增長。到本該用于預防性燃料管理計劃的資金正轉用于支付野火的支出。預防性燃料處理是一項工作，例如減薄灌木叢和幼樹，對除草劑進行除草處理，控制火勢以減少燃料負荷，以及采取其他措施來減少野火將是災難性野火的可能性，從而導致野火進一步擴大。入侵性草叢，生態完整性喪失和更頻繁的野火。原則上，人們通常都了解在預防性燃料處理工作與野火支出之間的權衡。但是，實際上，繼續導致野火成本增加的反饋仍在繼續。目前，關于預防性燃料處理工作的好處的信息很少。一類好處是減少野火撲滅支出的期望值。這項研究的目的是建立一個模型，以估算旨在減少大盆地入侵植物的燃料的管理行動所節省的野火抑制成本。野火抑制成本是使用美國森林服務局有關成本的歷史數據估算的在1995年至2007年之間，由森林管理局和土地管理局管理的大盆地土地上發生的大火。這些數據包括植被類型和狀況。該信息與火災危險等級指數一起用于構建加權燃料類型的指數。這在回歸模型中用于估計野火抑制成本與植被類型的函數關系，從而導致每種給定植被類型的邊際野火抑制成本貢獻。將植被類型的回歸系數與處理成功率和野火事件概率一起使用，以進行200年的成本節省分析。公共土地管理者可以利用這種類型的過程來確定如何分配有限的資源以最大程度地節省成本。開發的框架具有很高的適應性，可用于分析其他活動的影響，例如牧場，娛樂和發展。

著錄項

  • 作者

    Landis, Malieka Te'.;

  • 作者單位

    University of Nevada, Reno.;

  • 授予單位 University of Nevada, Reno.;
  • 學科 Economics Environmental.;Agriculture Range Management.;Sustainability.
  • 學位 M.S.
  • 年度 2010
  • 頁碼 87 p.
  • 總頁數 87
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類
  • 關鍵詞

  • 入庫時間 2022-08-17 11:36:59

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