Intraspecific variation of invaded pollination networks – the role of pollen-transport, pollen-transfer and different levels of biological organization

IF 4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Perspectives in Ecology and Conservation Pub Date : 2023-04-01 DOI:10.1016/j.pecon.2023.03.003

Carine Emer , Jane Memmott

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引用次数: 2

Abstract

•
Pollination networks have long been studied by quantifying plant-flower visitor species interactions. Despite making considerable contributions, this ignores important steps of pollen movement from anthers to receptive stigmas and neglects the intraspecific variation of the interacting partners. Addressing specialization and niche partitioning regarding heterospecific pollen transport and transfer, is fundamental to untangle the mechanisms behind contrasts seen in the impact of alien species on native communities.
•
We used two well-sampled datasets on pollen-transport and pollen-transfer networks to test how intraspecific variation in interaction specialisation affects invaded pollination networks. We considered different levels of biological organization: from species- to individual-based networks.
•
We found significant intraspecific variation in the pollen loads and pollen deposition of the invasive plant Impatiens glandulifera; thus only a few individual pollinators and plant stigmas carried large amounts of alien pollen grains, potentially functioning as super-spreaders driving the invading process. Consequently, most individuals carried only a few, or no alien pollen at all, possibly buffering the negative effects of invasive plants at the population and community levels.
•
Node and structural specialization were higher for individual-based and pollen-transfer networks, suggesting a lack of dominant, highly generalist links when downscaling from pollen-transport to pollen-transfer, and from species to individual-based networks.
•
The high specialization, selectiveness and niche partitioning of plants, pollinators and their interaction revealed at the different stages of the pollination process and across distinct levels of biological organization, suggest important mechanisms associated with the (re) organization of population niches. Moreover, these mechanisms provide a promising approach towards a more comprehensive understanding of the dynamics of invasion biology from population to community and ecosystem functioning.

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入侵授粉网络的种内变异——花粉运输、花粉转移和不同水平生物组织的作用

•授粉网络长期以来一直通过量化植物与花的相互作用来研究。尽管做出了相当大的贡献，但这忽略了花粉从花药到接受柱头运动的重要步骤，也忽略了相互作用伴侣的种内变异。解决关于异种花粉运输和转移的专门化和生态位分配问题，是解开外来物种对本地群落影响的对比背后机制的基础。•我们使用花粉运输和花粉转移网络的两个样本数据集来测试相互作用专门化的种内变异如何影响入侵的授粉网络。我们考虑了不同层次的生物组织:从基于物种的网络到基于个体的网络。•我们发现外来入侵植物凤仙花(Impatiens glandulifera)的花粉负荷和花粉沉积在种内存在显著差异;因此，只有少数传粉者和植物柱头携带大量外来花粉粒，潜在地发挥着驱动入侵过程的超级传播者的作用。因此，大多数个体只携带少量或根本不携带外来花粉，可能在种群和群落水平上缓冲了外来植物的负面影响。•以个体为基础的网络和花粉转移网络的节点和结构专业化程度更高，这表明当从花粉运输到花粉转移以及从物种到以个体为基础的网络缩小规模时，缺乏主导的、高度通才的联系。•在传粉过程的不同阶段和不同生物组织水平上揭示的植物、传粉者及其相互作用的高度专门化、选择性和生态位划分，提示了与种群生态位(再)组织相关的重要机制。此外，这些机制为更全面地了解入侵生物学从种群到群落和生态系统功能的动态提供了有希望的方法。

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来源期刊

Perspectives in Ecology and Conservation Environmental Science-Nature and Landscape Conservation

CiteScore

7.80

自引率

4.30%

发文量

审稿时长

59 days

期刊介绍： Perspectives in Ecology and Conservation (PECON) is a scientific journal devoted to improving theoretical and conceptual aspects of conservation science. It has the main purpose of communicating new research and advances to different actors of society, including researchers, conservationists, practitioners, and policymakers. Perspectives in Ecology and Conservation publishes original papers on biodiversity conservation and restoration, on the main drivers affecting native ecosystems, and on nature’s benefits to people and human wellbeing. This scope includes studies on biodiversity patterns, the effects of habitat loss, fragmentation, biological invasion and climate change on biodiversity, conservation genetics, spatial conservation planning, ecosystem management, ecosystem services, sustainability and resilience of socio-ecological systems, conservation policy, among others.