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.

由于缺乏数十年的长期研究并记录这些变化，因此阻碍了了解人类对生物多样性的影响。这样的研究如此罕见，因为它们很难维持，并且因为它们通常需要数十年的时间才能产生有关长期跨越的全球变化的见解。可以重复记录过去生态状况的研究的历史数据集，以更好地了解人类对生物多样性的影响。诸如授粉之类的互惠主义支持了大量的生物多样性，并且被认为在面对环境变化时特别容易受到干扰。我们依靠传粉媒介来提供他们提供的生态系统服务。该项目将通过从Clements和Long（1923年）进行的有关社区范围内的植物 - 托管相互作用的经典研究中重新采样数据来评估不同的植物 - 托管网络的长期变化。 The influential ecologist, Frederic E. Clements, and his protégée, Frances L. Long, carefully documented interactions between a divers 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.保留了Clements和长期研究的栖息地，使该项目中的研究人员能够评估全球变化的作用，并具有不确定的影响，例如潜在抑制下降和气候诱导的物候不匹配（与广泛的栖息地丧失和具有较大且有据可查的影响的广泛栖息地丧失和碎片相比）。该项目将提供培训和吸引学生的机会。这项工作的发现将以各种方式传播到广泛的受众群体中，包括本地K-12解释性户外节目，博物馆展览，向公众和经理的演讲以及网络视频，以广泛传播这项工作。该项目将通过提供难得的机会来了解一个世纪临时规模的相互作用网络如何变化，从而提高生物多样性变化和生态网络的知识。这项工作将决定植物 - 授粉网络的组成和结构如何改变，以及是否有证据表明物候学和授粉媒介下降的变化，这反过来又可以解释相互作用的变化。该项目中的研究问题是：（1）在历史和当代数据集之间，花访问者的抽象和丰富度发生了什么变化？ （2a）植物，传粉媒介及其相互作用的时间（物候）在历史和当代数据集之间发生了什么变化； （2b）并在植物和授粉媒介的物候重叠中的转变预测相互作用损失吗？ （3）在历史和当代时代之间，派克峰上的结构和组成植物 - 授粉网络如何变化？只有另一项研究检查了植物 - 授粉网络的长期变化，并在相当的时间范围内检查了它，并且在高度改进的人类主导的景观中进行了研究。它记录了授粉媒介物种的下降，并拆卸了网络，表明对进一步物种损失的敏感性增加。但是，在尚未破坏和分散的栖息地中的长期变化及其后果仍然不确定。这种不确定性导致关于自然生态系统中是否发生了批发昆虫下降的争论。这项工作将告知辩论并解释生物多样性变化的原因和后果。此外，它将研究生态网络的空间时间维度，这是该领域的一个野蛮主题。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响评估标准，被认为是通过评估来获得的支持。

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