Müllerová Jana, Szabó Péter, Hédl Radim
Department of GIS and Remote Sensing, Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice, Czech Republic.
Department of Vegetation Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
For Ecol Manage. 2014 Nov 1;331:104-115. doi: 10.1016/j.foreco.2014.07.032.
European broadleaved forests have been influenced by humans for centuries. Historical management practices are related to environmental conditions but the role of socio-economic factors is also important. For the successful restoration of traditional management for conservation purposes, detailed knowledge on management history and on the driving forces of historical forest changes is necessary. In order to reconstruct long-term spatio-temporal dynamics in forest management, we chose the Pálava Protected Landscape Area, Czech Republic and analyzed archival sources spanning the past seven centuries. Forests in the study area comprise two relatively large woods (Děvín and Milovice) with different environmental conditions. Historical forest management in both woods was coppicing. The coppice cycle was lengthened from 7 years (14 century) to more than 30 years (19 century) with a fluctuating density of standards. After WWII, coppicing was completely abandoned. This led to pronounced changes in forest age structure accompanied by stand unification indicated by a sharp decrease in the Shannon index of age diversity. To study local attributes responsible for spatial patterns in coppice abandonment, we constructed a regression model with the date of abandonment as a dependent variable and three groups of explanatory variables: i) remoteness of forest parcels, (ii) morphometric environmental factors and iii) site productivity. In Děvín Wood, coppicing was abandoned gradually with the pattern of abandonment related significantly to slope steepness and forest productivity. Poorly accessible upper slopes and low productive forest sites were abandoned earlier. By contrast, in Milovice Wood, where no clear topographic gradient is present, the abandonment of coppicing was not related to any of the variables we studied. Our study brings insights into the history and consequences of past management practices, and can be used in current attempts to re-establish coppice management for conservation purposes and as a source of sustainable energy.
几个世纪以来,欧洲阔叶林一直受到人类的影响。历史管理实践与环境条件相关,但社会经济因素的作用也很重要。为了成功恢复用于保护目的的传统管理方式,有必要详细了解管理历史以及历史森林变化的驱动因素。为了重建森林管理中的长期时空动态,我们选择了捷克共和国的帕拉瓦保护区,并分析了过去七个世纪的档案资料。研究区域的森林包括两片环境条件不同的相对较大的树林(德维恩和米洛维采)。两片树林的历史森林管理方式均为矮林作业。矮林作业周期从7年(14世纪)延长至30多年(19世纪),保留木密度波动。第二次世界大战后,矮林作业被完全废弃。这导致森林年龄结构发生显著变化,同时林分趋于统一,年龄多样性的香农指数急剧下降表明了这一点。为了研究导致矮林作业废弃空间格局的局部属性,我们构建了一个回归模型,将废弃日期作为因变量,三组解释变量作为自变量:i)林地块的偏远程度,ii)形态测量环境因素,iii)立地生产力。在德维恩树林,矮林作业逐渐被废弃,废弃模式与坡度陡度和森林生产力显著相关。难以到达的上坡和低产林地块较早被废弃。相比之下,在米洛维采树林,由于不存在明显的地形梯度,矮林作业的废弃与我们研究的任何变量均无关。我们的研究为过去管理实践的历史和后果提供了见解,可用于当前为保护目的重新建立矮林作业以及作为可持续能源来源的尝试。