期刊
SCIENCE
卷 349, 期 6255, 页码 1541-1544出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aab0868
关键词
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资金
- Arapaho National Forest, Niwot Ridge Long-Term Ecological Research (NSF) [DEB-1027341]
- NSF [DEB-79-10786, 1045322]
- Direct For Education and Human Resources
- Division Of Graduate Education [1045322] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1027341] Funding Source: National Science Foundation
Ecological partnerships, or mutualisms, are globally widespread, sustaining agriculture and biodiversity. Mutualisms evolve through the matching of functional traits between partners, such as tongue length of pollinators and flower tube depth of plants. Long-tongued pollinators specialize on flowers with deep corolla tubes, whereas shorter-tongued pollinators generalize across tube lengths. Losses of functional guilds because of shifts in global climate may disrupt mutualisms and threaten partner species. We found that in two alpine bumble bee species, decreases in tongue length have evolved over 40 years. Co-occurring flowers have not become shallower, nor are small-flowered plants more prolific. We argue that declining floral resources because of warmer summers have favored generalist foraging, leading to a mismatch between shorter-tongued bees and the longer-tubed plants they once pollinated.
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