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首页> 外文期刊>Conservation Biology >Multispecies and multiscale conservation planning: Setting quantitative targets for red-listed lichens on ancient oaks [Planificacíon de la conservacíon para ?ultiples especies y escalas: Definicíon de objetivos cuantitativos para ?iquenes sobre encinos antiguos en la lista roja]
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Multispecies and multiscale conservation planning: Setting quantitative targets for red-listed lichens on ancient oaks [Planificacíon de la conservacíon para ?ultiples especies y escalas: Definicíon de objetivos cuantitativos para ?iquenes sobre encinos antiguos en la lista roja]

机译：多物种和多尺度的保护规划：为古橡树上的红色名录地衣设定定量目标[多种物种和规模的保护规划：为古橡树上的红色清单上的地衣定义量化目标]

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摘要

Species occurrence in a habitat patch depends on local habitat and the amount of that habitat in the wider landscape. We used predictions from empirical landscape studies to set quantitative conservation criteria and targets in a multispecies and multiscale conservation planning effort. We used regression analyses to compare species richness and occurrence of five red-listed lichens on 50 ancient oaks (Quercus robur; 120-140 cm in diameter) with the density of ancient oaks in circles of varying radius from each individual oak. Species richness and the occurrence of three of the five species were best explained by increasing density of oaks within 0.5 km; one species was best explained by the density of oaks within 2 km, and another was best predicted by the density of oaks within 5 km. The minimum numbers of ancient oaks required for "successful conservation" was defined as the number of oaks required to obtain a predicted local occurrence of 50% for all species included or a predicted local occurrence of 80% for all species included. These numbers of oaks were calculated for two relevant landscape scales (1 km~2 and 13 km~2) that corresponded to various species responses, in such a way that calculations also accounted for local number of oaks. Ten and seven of the 50 ancient oaks surveyed were situated in landscapes that already fulfilled criteria for successful conservation when the 50% and 80% criteria, respectively, were used to define the level of successful conservation. For cost-efficient conservation, oak stands in the landscapes most suitable for successful conservation should be prioritized for conservation and management (e.g., grazing and planting of new oaks) at the expense of oak stands situated elsewhere.
机译：栖息地中物种的出现取决于当地的栖息地以及更广泛景观中该栖息地的数量。我们使用来自经验性景观研究的预测来设定定量保护标准和目标，以进行多物种和多尺度的保护规划工作。我们使用回归分析来比较物种丰富度和50个古橡树（栎木;直径120-140厘米）上五个红色列出的地衣的出现与每个橡树半径不同的圆上古橡树的密度。物种丰富度和五个物种中的三个物种的发生可以通过在0.5 km内增加橡树密度来最好地解释。最好用2公里以内的橡树密度来解释一个物种，而最好用5公里以内的橡树密度来预测另一个物种。 “成功保存”所需的古代橡树的最小数量被定义为，对于包括的所有物种而言，要获得50％的预计本地发生率，或者对于包括的所有物种而言，预计的80％本地发生率所需的橡树数量。这些橡树的数量是根据与各种物种响应相对应的两个相关景观等级（1 km〜2和13 km〜2）计算的，因此计算也考虑了当地的橡树数量。当分别使用50％和80％的标准来定义成功保护的水平时，被调查的50棵古橡树中有10和7个位于已经满足成功保护标准的景观中。为了实现节约成本的保护，应优先考虑最适合成功保护的景观中的橡树架进行养护和管理（例如放牧和种植新橡树），而要牺牲其他地方的橡树架。

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