规定烧伤季节对黑松亚种林下植被的短期影响。萨尔兹曼尼(杜纳尔)佛朗哥地中海森林

IF 3 3区 农林科学 Q2 ECOLOGY
Á. Fajardo-Cantos, D. Moya, M. Lucas‐Borja, P. Plaza‐Álvarez, E. Peña‐Molina, J. González‐Romero, Jorge de las Heras-Ibañez
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引用次数: 0

摘要

日益恶化的气候变化和不断升高的气温引发了更严重、更持久的野火,引发了人们对生态系统服务的担忧。规定的燃烧(PB)用于减少森林燃料负荷。提高对PB后植被反应的认识对于生成监测生态燃烧效应的共同点和生成协议或实践指南至关重要。我们比较了黑松12个小区低强度(春季、夏季和秋季)和未燃区的PB季节性。萨尔茨曼尼地中海森林。我们的植被分析是短期的(每次PB后一年)。我们使用Canfield样条法分析了植被覆盖率、α-多样性(Pielou、Simpson和Shannon指数)、生命形式和火灾适应特征,然后进行了非度量多维标度(NMDS)和双向方差分析等统计分析。在每个季节,焚烧地块的α-多样性显著降低(>相异度的55%),当比较焚烧地块和未焚烧地块时,夏季PB之后的最低值(相异度为69%)。PB季节性后,焚烧地块的半隐生植物(15−20%)和地下植物覆盖率(从6%增加到14%,在某些情况下从4%增加到8%)显著增加;然而,显生植物减少了(从13%减少到5%)。在PB之后,呼吸路由器更占主导地位(增加了15-20%),这表明呼吸路由器的恢复速度更快,并且在低强度燃烧后快速产生高易燃物种的燃料负荷,如Bromus。这表明,低强度的规定燃烧可能不是这些呼吸物种的最佳方法。这项研究有助于了解早季燃烧如何影响易燃植被以及半干旱地区可用燃料的变化。这是实现标准化系统发展基础的关键,该系统允许对森林服务进行有效管理,以降低野火风险。这项研究的一个目的是观察不同季节反复燃烧对植被的影响,以及利用微生物和酶的土壤活性观察植物与土壤的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Short-Term Effects of Prescribed Burn Seasonality on the Understory in a Pinus nigra Arnold subsp. salzmannii (Dunal) Franco Mediterranean Forest
Worsening climate change and increasing temperatures generate more sever and extended wildfires, raising concerns about ecosystem services. Prescribed burns (PB) are used to reduce forest fuel loads. Improving knowledge regarding the vegetation response after PB is essential for generating common points for monitoring ecological burning effects and generating a protocol or practice guide. We compared the PB seasonality of low-intensity (spring, summer, and autumn) and unburned areas in a total of 12 plots in Pinus nigra Arnold ssp. salzmannii Mediterranean forest. Our vegetation analysis was short term (one year after each PB). We analyzed vegetation coverage, α-diversity (Pielou, Simpson, and Shannon’s index), life forms, and fire-adapted traits using the Canfield transect method, followed by statistical analyses such as non-metric multidimensional scaling (NMDS) and two-way ANOVA. α-diversity was significantly decreased (>55% of dissimilarity) in the burned plots during each season, with the lowest values after summer PB (69% of dissimilarity) when comparing the burned and unburned plots. There was a significant increase in hemicryptophytes (15−20%) and geophyte coverage (from 6% to 14%, or from 4% to 8% in certain cases) in the burned plots after PB seasonality; however, the phanerophytes were reduced (from 13% to 5%). Resprouters were more dominant after PB (an increase of 15–20%), which indicates that resprouters have a faster recovery and generate a fuel load quickly for highly flammable species such as Bromus after low-intensity burning. This suggests that low-intensity prescribed burning may not be the best methodology for these resprouting species. This study helps to understand how burning in the early season can affect inflammable vegetation and the change in fuel that is available in semi-arid landscapes. This is key to achieving the basis for the development of a standardized system that allows for the efficient management of forest services in order to reduce wildfire risks. One objective of this line of research is to observe the effects of recurrent burning in different seasons on vegetation, as well as plant−soil interaction using the microbial and enzyme soil activity.
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来源期刊
Fire-Switzerland
Fire-Switzerland Multiple-
CiteScore
3.10
自引率
15.60%
发文量
182
审稿时长
11 weeks
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