Bark Beetles Increase Biodiversity While Maintaining Drinking Water Quality
Bark Beetles Increase Biodiversity While Maintaining Drinking Water Quality
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DOI：
10.1111/conl.12153
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发表时间：
2015-07-01
影响因子：
8.5
通讯作者：
Mueller, Joerg
中科院分区：
文献类型：
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作者：
Beudert, Burkhard;Baessler, Claus;Mueller, Joerg
世界各地针叶林中日益严重的自然干扰使有关适当土地管理的政治决定复杂化。特别是，允许昆虫在不干预的情况下杀死树木，加剧了公众对严格保护区在维持生态系统服务和保护生物多样性方面的双重作用的辩论。研究表明，在德国东南部云杉冷杉林发生大规模树皮甲虫侵染后，饮用水径流中硝酸盐的最大浓度显著增加，但仅在源头尺度上暂时增加。此外，这一主要水质标准始终远低于世界卫生组织建议的限度。与此同时，生物多样性，包括列入红色名单的物种的数量，在广泛的谱系范围内增加了大多数分类群。我们的研究有力地支持了一项政策，即允许自然干扰恢复过程在以针叶树为主的山林中畅通无阻地运作，特别是在保护区内。
Increasing natural disturbances in conifer forests worldwide complicate political decisions about appropriate land management. In particular, allowing insects to kill trees without intervention has intensified public debate over the dual roles of strictly protected areas to sustain ecosystem services and to conserve biodiversity. Here we show that after large scale bark beetle Ips typographus infestation in spruce Picea abies forests in southeastern Germany, maximum nitrate concentrations in runoff used for drinking water increased significantly but only temporarily at the headwater scale. Moreover, this major criterion of water quality remained consistently far below the limit recommended by the World Health Organization. At the same time, biodiversity, including numbers of Red-listed species, increased for most taxa across a broad range of lineages. Our study provides strong support for a policy to allow natural disturbance-recovery processes to operate unimpeded in conifer-dominated mountain forests, especially within protected areas.