How landscape modifications affect functional diversity of floral characteristics pertinent to pollinators is poorly known. Flowers possess functional traits that sometimes coevolved with pollinators, crucial for the maintenance of both pollinator and plant communities. We evaluated how richness and functional diversity of available understory flowers respond to forest cover and landscape heterogeneity in a multiscale analysis. Plants in bloom were sampled from 25 landscapes in the understory of Atlantic Forest fragments in Brazil. Species were classified into functional groups regarding flower characteristics relevant to pollination. Landscape heterogeneity and forest cover were measured in buffers ranging from 200 to 2000 m from sampling units and their correlation with plant richness and functional diversity was assessed using generalized linear models and further model selection through Akaike’s second-order information criterion. Plants’ richness and functional diversity were affected negatively by forest cover. The former responded to forest cover at a regional scale while the latter responded at a local scale. Higher landscape heterogeneity increased richness and functional diversity. Our results showed that forest cover and landscape heterogeneity are important to support biodiversity related to pollination, mostly due to the availability of diversified resources and nesting sites associated to different land-uses for pollinators and flowering plant communities. These findings should highlight, along with forest cover, landscape heterogeneity as an environmental management priority in rural tropical areas for mitigating the loss of plant biodiversity and enhancing ecosystem functioning.

中文翻译：

---

景观环境是否会影响与巴西东南部大西洋雨林森林片段中与授粉有关的功能多样性和地下花卉的丰富性？

人们对景观修改如何影响与传粉媒介有关的花卉特征的功能多样性知之甚少。花具有有时与授粉媒介共同进化的功能性状，对维持授粉媒介和植物群落至关重要。我们在多尺度分析中评估了可用林下花卉的丰富度和功能多样性如何响应森林覆盖和景观异质性。从巴西大西洋森林碎片下层的25个景观中采样了盛开的植物。根据与授粉有关的花的特性，将物种分为功能组。在距离采样单元200至2000 m的缓冲区中测量了景观异质性和森林覆盖率，并使用广义线性模型并通过Akaike的二阶信息准则进一步选择模型，评估了它们与植物丰富度和功能多样性的相关性。森林覆盖对植物的丰富度和功能多样性造成了负面影响。前者在区域范围内对森林覆盖率做出反应，而后者在地方范围内做出响应。更高的景观异质性增加了丰富度和功能多样性。我们的研究结果表明，森林覆盖率和景观异质性对于支持与授粉有关的生物多样性很重要，这主要是由于可获得多种资源和授粉媒介和开花植物群落与不同土地用途相关的筑巢地点。