Understanding changes in a plant-pollinator network over a century of global change

了解一个世纪以来全球变化中植物传粉者网络的变化

• 批准号: 2102974
• 负责人: Julian Resasco
• 金额: $ 26.01万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-05-15 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2102974&HistoricalAwards=false
• 关键词: Understanding; changes; plant; pollinator; network

Understanding human impacts on biodiversity is hindered by a lack of long-term studies spanning decades and documenting these changes. Such studies are so rare because they are difficult to maintain and because they often take decades to yield insights about global changes that occur over long time spans. Historical datasets from studies documenting past ecological conditions can be repeated to better understand human impacts on biodiversity. Mutualisms like pollination support a great deal of biodiversity and are thought to be particularly susceptible to disruption in the face of environmental change. We depend on pollinators for the ecosystem services they provide. This project will evaluate the long-term change in a diverse plant-pollinator network by re-sampling data from a century-old classic study on community-wide plant-pollinator interactions conducted by Clements and Long (1923). The influential ecologist, Frederic E. Clements, and his protégée, Frances L. Long, carefully documented interactions between a diverse assemblage of plants and pollinators in the region of Pikes Peak, CO, USA, starting in 1910. Clements and Long’s study is special due to the richness of its detailed data which go beyond species occurrences and include observations of plant-pollinator interactions, phenology (dates), and pollinator visitation rates. The habitat of the Clements and Long study has been preserved, allowing researchers in this project to assess the roles of global changes with uncertain impacts such as potential insect declines and climate-induced phenological mismatches (compared to impacts like extensive habitat loss and fragmentation which have large, well-documented impacts). The project will provide opportunities to train and engage students. Findings from this work will be disseminated to broad audiences in various ways which include local K-12 interpretive outdoor programs, museum exhibits, presentations to the general public and managers, and web video to disseminate this work widely. This project will advance knowledge of biodiversity change and ecological networks by providing a rare opportunity to understand of how interaction networks change over the temporal scale of a century. This work will determine how the composition and structure of the plant-pollinator network has changed and whether there is evidence for changes in phenology and pollinator declines, which could in turn explain changes in interactions. The research questions in this project are: (1) How has the abundance and richness of flower visitors changed between historical and contemporary datasets? (2a) How has the timing (phenology) of plants, pollinators and their interactions changed between historical and contemporary datasets; (2b) and do shifts in phenological overlap of plants and pollinators predict interaction loss? (3) How have the structure and composition plant-pollinator networks on Pikes Peak changed between historical and contemporary times? Only one other study examined long-term changes in plant-pollinator networks at comparable time scales and it has done so in highly modified, human-dominated landscapes. It recorded declines in pollinator species and disassembly of networks indicating increased susceptibility to further species loss. However, the long-term changes and their consequences in habitats that have not been destroyed and fragmented remains uncertain. This uncertainty has led to debate about whether wholesale insect declines have occurred in natural ecosystems. This work will inform that debate and explain the causes and consequences of biodiversity change. Additionally, it will examine spatiotemporal dimensions of ecological networks, a burgeoning topic in the field.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

缺乏跨越数十年的长期研究并记录这些变化，阻碍了理解人类对生物多样性的影响。这类研究之所以如此罕见，是因为它们很难维护，而且它们往往需要数十年的时间才能对长时间内发生的全球变化产生洞察。记录过去生态状况的研究的历史数据可以重复，以更好地了解人类对生物多样性的影响。像授粉这样的相互作用支持了大量的生物多样性，被认为在面对环境变化时特别容易受到破坏。我们依靠传粉者提供生态系统服务。这个项目将通过重新采样Clements和Long(1923)进行的一项关于社区范围内植物-传粉者相互作用的百年经典研究的数据来评估多样化的植物-传粉者网络的长期变化。有影响力的生态学家弗雷德里克·E·克莱门茨和他的门徒弗朗西斯·L·朗仔细记录了从1910年开始在美国科罗拉多州派克斯峰地区各种植物和传粉者之间的相互作用。克莱门茨和朗的研究之所以特别，是因为其详细数据的丰富性超出了物种发生的范围，包括对植物-传粉者相互作用、物候(日期)和传粉者访视率的观察。克莱门茨和长期研究的栖息地被保存下来，使该项目的研究人员能够评估具有不确定影响的全球变化的作用，例如潜在的昆虫减少和气候导致的物候不匹配(与具有大量有记录的影响的广泛栖息地丧失和碎片化的影响相比)。该项目将提供培训和吸引学生参与的机会。这项工作的成果将通过各种方式传播给广大受众，包括当地的K-12解释性户外节目、博物馆展品、向普通公众和管理人员的演示，以及广泛传播这项工作的网络视频。该项目将通过提供一个难得的机会来了解相互作用网络如何在一个世纪的时间尺度上变化，从而促进对生物多样性变化和生态网络的了解。这项工作将确定植物-传粉者网络的组成和结构如何变化，以及是否有物候变化和传粉者下降的证据，这反过来可以解释相互作用的变化。本项目的研究问题是：(1)花卉访客的丰富度和丰富度在历史数据集和当代数据集之间是如何变化的？(2a)植物、传粉者及其相互作用的时间(物候)在历史数据集和当代数据集之间是如何变化的；(2b)植物和传粉者物候重叠的变化是否预示着交互作用的丧失？(3)派克斯峰上植物传粉者网络的结构和组成在历史和当代之间发生了怎样的变化？只有一项研究考察了植物-传粉者网络在可比时间尺度上的长期变化，并在高度修改的、人类主导的景观中做到了这一点。它记录了传粉者物种的减少和网络的解体，表明对进一步物种丧失的易感性增加。然而，尚未被破坏和支离破碎的栖息地的长期变化及其后果仍然不确定。这种不确定性引发了关于自然生态系统中是否发生了昆虫大规模减少的辩论。这项工作将为这场辩论提供信息，并解释生物多样性变化的原因和后果。此外，它还将研究生态网络的时空维度，这是该领域的一个新兴主题。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Does adding community science observations to museum records improve distribution modeling of a rare endemic plant?

• DOI: 10.1002/ecs2.4419
• 发表时间: 2023-03-01
• 期刊: ECOSPHERE
• 影响因子: 2.7
• 作者: Gaier, Andrew G.;Resasco, Julian
• 通讯作者: Resasco, Julian

New Records of Gynandromorphism in Heriades and Dianthidium and Images of the First Reported Dianthidium Gynandromorph (Hymenoptera: Megachilidae)

Heriades 和 Dianthidium 雌雄同形的新记录以及首次报道的 Dianthidium 雌雄同体的图像（膜翅目：Megachilidae）

• DOI: 10.2317/0022-8567-96.2.30
• 发表时间: 2023
• 期刊: Journal of the Kansas Entomological Society
• 影响因子: 0.5
• 作者: Mullins, Jessica L.;Paraskevopoulos, Anna W.;Pittman, Cameron;Burrows, Skyler J.;Carper, Adrian L.;Resasco, Julian
• 通讯作者: Resasco, Julian

Floral visitors of a Colorado endemic chasmophyte, Telesonix jamesii (Saxifragaceae)

科罗拉多州特有的蕨类植物 Telesonix jamesii（虎耳草科）的花来客

• 发表时间: 2023
• 期刊: Western North American naturalist
• 影响因子: 0.6
• 作者: Gaier AG, Manzitto-Tripp EA