Mapping forest growth and decline in a temperate mixed forest using temporal trend analysis of Landsat imagery, 1987-2010
Mapping forest growth and decline in a temperate mixed forest using temporal trend analysis of Landsat imagery, 1987-2010
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DOI：
10.1016/j.rse.2013.11.006
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发表时间：
2014-02-05
影响因子：
13.5
通讯作者：
Mitchell, Scott W.
中科院分区：
文献类型：
--
作者：
Czerwinski, Chris J.;King, Douglas J.;Mitchell, Scott W.
森林管理寻求一系列不同目标的可持续性，包括经济目标、提供生态系统服务和提供各种可能的土地用途。必须量化、绘制地图并监测自然和人为过程在一段时间内产生的森林动态，这与变化的时间尺度以及土地管理目标和决策相适应。本文以加拿大魁北克省加蒂诺公园的温带混交林为研究对象，利用陆地卫星5TM影像的时间序列，分析了温带混交林动态变化的时间趋势。首先评估了几个植被指数作为野外测量的植被丰富度参数的指标，如叶面积指数、冠层开度、胸径和断面积。其中，抽穗帽湿度(TON)提供了最好的关系(例如，与LAI的相关系数r=0.81)，并区分了针叶林、混交林和落叶林。从1987年到2010年生长季节的13个晴空5TM场景被相对校准并组装成图像时间序列。TCW应用于图像时间序列，紧随其后的是Theil-Sen和上下文Mann-Kendall趋势分析，发现了实地验证的微妙和渐进的森林变化。在整个过程中，641公顷(占公园面积的1.8%)表现出显著的增长，689公顷(占公园面积的1.9%)表现出下降。绘制森林变化的时间、地点、大小和持续时间的地图将有助于为加蒂诺公园内的土地管理政策和行动提供信息，这种方法可能适用于其他类似的森林。(C)2013 Elsevier Inc.保留所有权利。
Forest management seeks sustainability for a diverse set of goals, including economic objectives, provision of ecosystem services, and provision of a variety of possible land uses. It is important to quantify, map and monitor forest dynamics resulting from natural and anthropogenic processes over time periods appropriate to the temporal scale of change as well as to land management goals and decision making. This paper presents temporal trend analyses of temperate mixed forest dynamics in Gatineau Park, Quebec, Canada, using a time series of Landsat 5 TM scenes. Several vegetation indices were first evaluated as indicators of field measured vegetation abundance parameters such as leaf area index, canopy openness, DBH, and basal area. Of these, Tasseled Cap Wetness (TON) provided the best relationships (e.g., r = 0.81 against LAI) and it differentiated between coniferous, mixed and deciduous forests. Thirteen clear sky 5 TM scenes from the growing seasons of 1987 to 2010 were relatively calibrated and assembled into an image time-series. TCW applied to the image time-series followed by Theil-Sen and Contextual Mann-Kendall trend analysis detected subtle and gradual field-verified forest change. Gradual and abrupt forest decline or regrowth periods were identified; over the full period, 641 ha (1.8% of the park) exhibited statistically significant growth, and 689 ha (1.9%) exhibited decline. Mapping the timing, location, magnitude, and duration of forest change will help inform land management policy and actions within Gatineau Park and such methods may be applied in other similar forests. (C) 2013 Elsevier Inc. All rights reserved.