Habitat selection assessments at multiple spatial scales provide a more complete understanding of the habitat requirements of a species, a matter that is especially useful for managing endangered wildlife. Studies of the diet and population distribution of threatened Peruvian Plantcutters (Phytotoma raimondii) suggest that the presence of Prosopis spp. trees, and the shrubs Grabowskia boerhaaviaefolia and Scutia spicata could explain the scattered distribution of their remnant subpopulations. However, our overall understanding of this remains unclear and incomplete because plantcutters are often absent in areas dominated by Prosopis spp., and other species of plants have largely been overlooked in distribution models. One way to address this issue is to also investigate spatial distribution patterns at finer scales within subpopulations. We modeled the probability of territory occupancy at one of their last strongholds, the Pómac Forest Historical Sanctuary in Peru. Our predictors were defined by biotic interactions using data collected in 2015 and 2016, and previous studies of their diet. We found that Peruvian Plantcutters consumed the leaves, fruits, and flowers of at least nine species of plants, but only G. boerhaaviaefolia shrubs, and the trees Prosopis spp. and Colicodendron scabridum were used more than expected based on availability. We did not observe consumption of S. spicata, but this plant was rare. Territory occupancy was positively influenced only by the availability of G. boerhaaviaefolia, a plant used by Peruvian Plantcutters both as a source of food and nest material. Our results suggest that, despite their diverse diet, Peruvian Plantcutters can be particularly dependent on the availability of G. boerhaaviaefolia. Accordingly, this may explain why both co‐occur in most subpopulations. Lastly, although we found that Prosopis spp. did not explain territory occupancy, previous research shows that it does explain their distribution on a broader scale (across subpopulations). This inconsistency across spatial scales suggests a potential key role of Prosopis spp. in guaranteeing dispersal between and connectivity among subpopulations.

中文翻译：

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单一植物物种可预测秘鲁割草者种群的领土占用

在多个空间尺度上进行栖息地选择评估，可以更全面地了解物种的栖息地需求，这对于管理濒危野生动植物特别有用。对濒临灭绝的秘鲁Plant（Phytotoma raimondii）的饮食和种群分布的研究表明，存在Prosopis spp。树木和灌木Grabowskia boerhaaviaefolia和Scutia spicata可以解释其残余亚群的分散分布。然而，由于在Prosopis占主导地位的地区通常不存在割草机，因此我们对此的总体了解仍不清晰且不完整物种和其他植物物种在分布模型中已被大大忽略。解决此问题的一种方法是还研究亚种群内较小尺度的空间分布模式。我们对秘鲁最后一个据点之一的波马克森林历史保护区的领土占领概率进行了建模。我们的预测因子是通过使用2015年和2016年收集的数据以及先前对其饮食的研究进行的生物相互作用来定义的。我们发现秘鲁的割草者食用了至少9种植物的叶子，果实和花朵，但仅食用G. boerhaaviaefolia灌木和树木Prosopis spp。基于可用性，蛇麻草和d兰的使用量超出了预期。我们没有观察到消耗S. spicata，但这种植物很少见。领土占用呈正仅通过的可用性的影响G. boerhaaviaefolia，秘鲁Plantcutters既作为食物和巢材料源使用的植物。我们的研究结果表明，尽管他们多样化的饮食，秘鲁Plantcutters可以是特别依赖的可用性G. boerhaaviaefolia。因此，这可以解释为什么两者在大多数亚人群中同时发生。最后，尽管我们发现Prosopis spp。并未解释领土占用，先前的研究表明它确实解释了更广泛的分布（跨亚种群）。这种跨空间尺度的不一致暗示了Prosopis的潜在关键作用spp。在确保亚群之间的分散和连通性方面。