本文主要研究内容
作者（2019）在《Assessing the influence of harvesting intensities on structural diversity of forests in south-west Germany》一文中研究指出：Background: To increase ecosystem resilience and biodiversity, the maintenance and improvement of structural and compositional diversity of forests has become an important goal in forest management for many forest owners and jurisdictions. At the same time, future harvesting intensity(HI) may increase to meet the demand for woody biomass by an increasing bioeconomy sector. Yet, the influence of HI on forest structural diversity is largely unknown. Here, we address this issue by analyzing the relationship between HI and structural diversity based on large-scale national forest inventory(NFI) data, where the latter is quantified using a previously developed Forest Structure Index and HI is expressed as wood volume removal during the period 2002–2012 for the same inventory plots.Results: Our results show a surprisingly small impact of harvesting intensity on changes in structural diversity for most of the analysed types of forests. Only intense harvesting(> 80%–90% of initial growing stock) led to a significant reduction in structural diversity. At low to moderate HI most aspects of structural diversity were positively influenced.Only the quadratic mean DBH and the volume of large trees(≥ 40 cm DBH) were substantially negatively influenced at HI > 60% and 70% of initial growing stock, respectively.Conclusions: In several forest types, HI could be increased without a reduction in overall structural diversity. Hence,structural diversity in these selectively managed forests appears to be a very resistant forest property in relation to HI.Other indicators at stand and landscape scale may be needed to adjust levels of HI that are suited to maintain forest biodiversity.
Abstract
Background: To increase ecosystem resilience and biodiversity, the maintenance and improvement of structural and compositional diversity of forests has become an important goal in forest management for many forest owners and jurisdictions. At the same time, future harvesting intensity(HI) may increase to meet the demand for woody biomass by an increasing bioeconomy sector. Yet, the influence of HI on forest structural diversity is largely unknown. Here, we address this issue by analyzing the relationship between HI and structural diversity based on large-scale national forest inventory(NFI) data, where the latter is quantified using a previously developed Forest Structure Index and HI is expressed as wood volume removal during the period 2002–2012 for the same inventory plots.Results: Our results show a surprisingly small impact of harvesting intensity on changes in structural diversity for most of the analysed types of forests. Only intense harvesting(> 80%–90% of initial growing stock) led to a significant reduction in structural diversity. At low to moderate HI most aspects of structural diversity were positively influenced.Only the quadratic mean DBH and the volume of large trees(≥ 40 cm DBH) were substantially negatively influenced at HI > 60% and 70% of initial growing stock, respectively.Conclusions: In several forest types, HI could be increased without a reduction in overall structural diversity. Hence,structural diversity in these selectively managed forests appears to be a very resistant forest property in relation to HI.Other indicators at stand and landscape scale may be needed to adjust levels of HI that are suited to maintain forest biodiversity.
论文参考文献
论文详细介绍
论文作者分别是来自Forest Ecosystems的，发表于刊物Forest Ecosystems2019年03期论文，是一篇关于,Forest Ecosystems2019年03期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Forest Ecosystems2019年03期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。