Transient dynamics in plant–pollinator networks: fewer but higher quality of pollinator visits determines plant invasion success
Transient dynamics in plant–pollinator networks: fewer but higher quality of pollinator visits determines plant invasion success
复制标题
植物传粉媒介网络的瞬态动态：更少但更高质量的传粉媒介访问决定了植物入侵的成功
DOI：
10.1111/oik.09634
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发表时间：
2023
期刊：
影响因子：
3.4
通讯作者：
Marsland, Robert
中科院分区：
文献类型：
--
作者：
Valdovinos, Fernanda S.;Dritz, Sabine;Marsland, Robert
入侵植物通常利用互惠关系在新的栖息地建立，并且往往比本地植物更频繁地被当地传粉者访问。然而，很少在网络范围内研究这些访问的质量和由此产生的生殖成功。在这里，我们使用一个动态模型来评估入侵的成功和对各种类型的非本地植物物种引入到成千上万的不同结构的植物传粉网络的本地人的影响。我们发现，网络结构特性并不能预测入侵的成功，但非本地特征和相互作用可以。具体来说，产生大量花朵奖励但在引入时很少有传粉者访问的非本地植物是唯一能够入侵网络的植物物种。这一结果是由设备引入后立即发生的瞬态动态确定的。成功的入侵增加了丰富的传粉者访问的入侵者，但重新分配的传粉者的觅食努力从本地植物的入侵者减少了本地植物的访问的数量和质量，并使网络稍微更模块化和嵌套。入侵者对传粉者和植物丰度的积极和消极影响，分别由植物丰富度缓冲。我们的研究结果要求评估入侵植物的影响，不仅对访问率和网络结构，而且对授粉以外的过程，包括种子生产和招聘的本地植物。
Invasive plants often use mutualisms to establish in their new habitats and tend to be visited by resident pollinators similarly or more frequently than native plants. The quality and resulting reproductive success of those visits, however, have rarely been studied in a network context. Here, we use a dynamic model to evaluate the invasion success and impacts on natives of various types of non‐native plant species introduced into thousands of plant–pollinator networks of varying structure. We found that network structure properties did not predict invasion success, but non‐native traits and interactions did. Specifically, non‐native plants producing high amounts of floral rewards but visited by few pollinators at the moment of their introduction were the only plant species able to invade the networks. This result is determined by the transient dynamics occurring right after the plant introduction. Successful invasions increased the abundance of pollinators that visited the invader, but the reallocation of the pollinators' foraging effort from native plants to the invader reduced the quantity and quality of visits received by native plants and made the networks slightly more modular and nested. The positive and negative effects of the invader on pollinator and plant abundance, respectively, were buffered by plant richness. Our results call for evaluating the impact of invasive plants not only on visitation rates and network structure, but also on processes beyond pollination including seed production and recruitment of native plants.