Dryness, wetness and temporary flooding reduce floral resources of plant communities with adverse consequences for pollinator attraction
Dryness, wetness and temporary flooding reduce floral resources of plant communities with adverse consequences for pollinator attraction
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干燥、潮湿和暂时的洪水减少了植物群落的花卉资源，对授粉昆虫的吸引力产生不利影响
DOI：
10.1111/1365-2745.13364
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发表时间：
2020
影响因子：
5.5
通讯作者：
Walter
中科院分区：
文献类型：
--
作者：
Walter
气候变化改变了全世界的降水制度，被认为是授粉者和授粉服务的主要威胁。然而，关于在多物种群落背景下，更潮湿和更干燥的条件如何影响传粉者的食物资源和传粉者的吸引力，人们知之甚少。目前尚不清楚在变化的水文条件下群落的变化如何影响传粉者。这项中观研究通过调查干旱、潮湿和暂时洪涝对植物群落内的花资源和传粉者吸引的影响来解决现有的研究空白，最初包括9种昆虫授粉和6种风媒授粉的植物。对花卉资源进行了三个生长季节的评估。我监测了群落描述因子(草本植物和草本植物物种丰富度的百分比，开花昆虫授粉个体的存在)，花卉性状(关键物种的花高、大小和重量，花糖含量)和植物适合性指标(传粉者吸引，关键物种的种子和花朵重量)。潮湿和特别干燥降低了昆虫传粉草本植物和开花草本植物个体的物种丰富度和生物量比例。持续湿润降低了关键品种红三叶的花糖含量。潮湿、临时淹水和特别干燥的社区传粉者访问的频率较低。活跃的传粉者在潮湿和洪水泛滥的社区停留的时间较少，而根本不访问干燥的社区。专性异种配子的种子和花重。草地早熟禾在洪水和干旱群落中的数量减少，这表明缺乏授粉对植物适合性造成了负面影响。干旱对花卉资源的负面影响主要表现在群落特征和花卉性状上，而潮湿和暂时性淹水的负面影响主要是由于昆虫传粉草本植物种类的减少所致。这项研究表明，植物群落组成的变化对于预测环境变化下植物-传粉者之间的相互作用具有决定性作用，但在过去的研究中，这些变化被忽视了。变化的降水模式将对农业用温带草原的花卉资源和传粉者的吸引力产生不利影响，这可能在未来几十年对授粉服务和粮食安全产生广泛的负面影响。
Climate change alters precipitation regimes world‐wide and is regarded as a major threat for pollinators and pollination services. Yet, not much is known on how wetter as well as drier conditions affect food resources for pollinators and pollinator attraction in a multi‐species community context. It is unclear how community shifts under changed hydrological conditions might affect pollinators.This mesocosm study addresses existing research gaps by investigating effects of drought, wetness and temporary flooding on floral resources and pollinator attraction within a plant community, initially including nine insect‐pollinated and six wind‐pollinated species. Floral resources were assessed over three growing seasons. I monitored community descriptors (percentage of herbs and herbaceous species richness, presence of flowering insect‐pollinated individuals), floral traits (flower height, size and weight, floral sugar content of one key species) and proxies for plant fitness (pollinator attraction, seed and flower weight of one key species).Wetness and especially dryness decreased the species richness and biomass proportion of insect‐pollinated herbaceous species and flowering herbaceous plant individuals occurred less frequently. Permanent wetness decreased the floral sugar content of the key speciesTrifolium pratense. Wet, temporary flooded and especially dry communities were visited by pollinators less often. Active pollinators spent less time within wet and flooded communities, while not at all visiting dry communities. Seed and flower weight of the obligate xenogamousT. pratensein flooded and dry communities decreased, indicating negative consequences for plant fitness caused by a lack of pollination.Synthesis. While dryness had negative effects for floral resources both in terms of community descriptors and floral traits, negative effects of wetness and temporary flooding were mostly caused by a decrease of insect‐pollinated herbaceous species. The study thus indicates that shifts in plant community composition are decisive for a predictive understanding of plant–pollinator interactions under environmental change, but these have been neglected in past research. Changing precipitation patterns will adversely affect floral resources and pollinator attraction in agriculturally used temperate grassland, which might have widespread negative consequences for pollination services and food security in the coming decades.
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DOI：
10.1016/j.agee.2011.11.015
发表时间：
2012-02
期刊：
Agriculture, Ecosystems & Environment
影响因子：
--
作者：
J. Walter;Kerstin Grant;C. Beierkuhnlein;J. Kreyling;Michael Weber;A. Jentsch
通讯作者：
J. Walter;Kerstin Grant;C. Beierkuhnlein;J. Kreyling;Michael Weber;A. Jentsch
影响因子：
2.1
作者：
Brooks, Mollie E.;Kristensen, Kasper;Bolker, Benjamin M.
通讯作者：
Bolker, Benjamin M.
影响因子：
5.8
作者：
Kuznetsova, Alexandra;Brockhoff, Per B.;Christensen, Rune H. B.
通讯作者：
Christensen, Rune H. B.
干旱对不同基因型番茄（Solanum lycopersicum L.）开花、产量和品质参数的影响
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
R. Sivakumar;S. Srividhya
通讯作者：
S. Srividhya