Host specificity of two pollinating seed-consuming fly species is not related to soil moisture of host plant in the high Himalayas
Song,Bo; Stocklin,Jurg; Gao,Yong-Qian; Peng,De-Li; Sun,Hang
2017
Source PublicationECOLOGY AND EVOLUTION
ISSN2045-7758
Volume7Issue:2Pages:780-789
Abstract

Studying the drivers of host specificity can contribute to our understanding of the origin and evolution of obligate pollination mutualisms. The preference-performance hypothesis predicts that host plant choice of female insects is related mainly to the performance of their offspring. Soil moisture is thought to be particularly important for the survival of larvae and pupae that inhabit soil. In the high Himalayas, Rheum nobile and R. alexandrae differ in their distribution in terms of soil moisture; that is, R. nobile typically occurs in scree with well-drained soils, R. alexandrae in wetlands. The two plant species are pollinated by their respective mutualistic seed-consuming flies, Bradysia sp1. and Bradysia sp2. We investigated whether soil moisture is important for regulating host specificity by comparing pupation and adult emergence of the two fly species using field and laboratory experiments. Laboratory experiments revealed soil moisture did have significant effects on larval and pupal performances in both fly species, but the two fly species had similar optimal soil moisture requirements for pupation and adult emergence. Moreover, a field reciprocal transfer experiment showed that there was no significant difference in adult emergence for both fly species between their native and non-native habitats. Nevertheless, Bradysia sp1., associated with R. nobile, was more tolerant to drought stress, while Bradysia sp2., associated with R. alexandrae, was more tolerant to flooding stress. These results indicate that soil moisture is unlikely to play a determining role in regulating host specificity of the two fly species. However, their pupation and adult emergence in response to extremely wet or dry soils are habitat-specific.

KeywordFruit-fly Phytophagous Insects Oviposition Preference Diptera Tephritidae Pupation Depth Ploidy Level Rheum-nobile Survival Performance Evolution Bradysia Host Specificity Offspring Performance Rheum Soil Moisture
Subject AreaEcology ; Evolutionary Biology
DOI10.1002/ece3.2644
Indexed BySCI
Language英语
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/54983
Collection中国科学院东亚植物多样性与生物地理学重点实验室
Recommended Citation
GB/T 7714
Song,Bo,Stocklin,Jurg,Gao,Yong-Qian,et al. Host specificity of two pollinating seed-consuming fly species is not related to soil moisture of host plant in the high Himalayas[J]. ECOLOGY AND EVOLUTION,2017,7(2):780-789.
APA Song,Bo,Stocklin,Jurg,Gao,Yong-Qian,Peng,De-Li,&Sun,Hang.(2017).Host specificity of two pollinating seed-consuming fly species is not related to soil moisture of host plant in the high Himalayas.ECOLOGY AND EVOLUTION,7(2),780-789.
MLA Song,Bo,et al."Host specificity of two pollinating seed-consuming fly species is not related to soil moisture of host plant in the high Himalayas".ECOLOGY AND EVOLUTION 7.2(2017):780-789.
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