4.5 Article

Warming temperatures affect meadow-wide nectar resources, with implications for plant-pollinator communities

期刊

ECOSPHERE
卷 13, 期 7, 页码 -

出版社

WILEY
DOI: 10.1002/ecs2.4162

关键词

Balsamorhiza sagittata; climate change; Eriogonum umbellatum; flower production; montane meadow; nectar; pollinator resources

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资金

  1. Iowa State University Graduate Program in Ecology and Evolutionary Biology
  2. Iowa State University Department of Ecology, Evolution, and Organismal Biology
  3. University of Wyoming-National Park Service Research Center

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This study evaluated the nectar response of two native forbs to warming and found that it reduced nectar volume, increased sugar concentration, and increased the number of flowers produced. These findings suggest that warming can induce changes in nectar characteristics and impact the nectar-feeding community.
Nectar production may be a point of sensitivity that can help link primary and secondary trophic responses to climate shifts, and is therefore important to our understanding of ecosystem responses. We evaluated the nectar response of two widespread native forbs, Balsamorhiza sagittata and Eriogonum umbellatum, to experimental warming in a high-elevation sagebrush meadow in the Teton Range, WY, USA, over two years, 2015 and 2016. Warming treatments reduced the occurrence of nighttime freezing and nectar volume but increased sugar concentration in nectar in both species in both years. Warming effects were also evident in a consistent increase in the number of flowers produced by B. sagittata. Our research suggests that warming associated with climate change has the potential to induce shifts in the nectar-feeding community by changing nectar characteristics such as volume and sugar concentration to which nectar feeders are adapted.

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