Comparison of prey fauna in tropical red traps versus temperate whitish traps in carnivorous Drosera indica complex (Droseraceae)

IF 1.1 4区生物学 Q4 ECOLOGY Plant Species Biology Pub Date : 2024-03-11 DOI:10.1111/1442-1984.12451

Kazuki Tagawa, Tomoki Sando, Masao Aoki, Mikio Watanabe

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Abstract

Certain carnivorous plant species display geographical variation in trap coloration, which may impact interactions with prey. Our study focused on Drosera indica (Droseraceae) in tropical Thailand and its phylogenetically related species Drosera toyoakensis in temperate Japan. Drosera indica in Thailand has green leaf blades with red tentacles when flowering, making the entire trap appear red. In contrast, D. toyoakensis in Japan has green leaf blades with green-white tentacles when flowering, and the entire trap appears white. Field observations revealed statistically significant differences in taxa and size of prey caught by D. indica and D. toyoakensis. Both species caught small flies, but D. toyoakensis additionally caught larger flies and butterflies, including pollinators. These differences in prey composition may reflect differences in trap coloration that evolved under different selection pressures for capturing prey. However, trap coloration and prey assemblages were influenced by various factors, and further research is required to elucidate their evolutionary significance.

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热带红色诱捕器与温带白色诱捕器中食肉 Drosera indica 复合物（Droseraceae）猎物动物群的比较

某些食肉植物物种的诱捕器着色存在地理差异，这可能会影响它们与猎物的相互作用。我们的研究重点是泰国热带地区的 Drosera indica（Droseraceae）及其系统发育相关的日本温带物种 Drosera toyoakensis。泰国的 Drosera indica 在开花时叶片为绿色，触角为红色，使整个诱捕器呈现红色。相比之下，日本的 D. toyoakensis 花期时叶片为绿色，触角为绿白色，整个诱捕器呈现白色。实地观察发现，D. indica 和 D. toyoakensis捕获的猎物在分类群和大小上有显著的统计学差异。这两个物种都捕捉到了小苍蝇，但 D. toyoakensis 还捕捉到了较大的苍蝇和蝴蝶，包括传粉昆虫。猎物组成的这些差异可能反映了捕虫笼颜色的差异，这种差异是在捕捉猎物的不同选择压力下进化而来的。然而，诱捕器的颜色和猎物组合受到各种因素的影响，需要进一步的研究来阐明它们的进化意义。

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来源期刊

Plant Species Biology 生物-生态学

CiteScore

2.70

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Plant Species Biology is published four times a year by The Society for the Study of Species Biology. Plant Species Biology publishes research manuscripts in the fields of population biology, pollination biology, evolutionary ecology, biosystematics, co-evolution, and any other related fields in biology. In addition to full length papers, the journal also includes short research papers as notes and comments. Invited articles may be accepted or occasion at the request of the Editorial Board. Manuscripts should contain new results of empirical and/or theoretical investigations concerning facts, processes, mechanisms or concepts of evolutionary as well as biological phenomena. Papers that are purely descriptive are not suitable for this journal. Notes & comments of the following contents will not be accepted for publication: Development of DNA markers. The journal is introducing ''Life history monographs of Japanese plant species''. The journal is dedicated to minimizing the time between submission, review and publication and to providing a high quality forum for original research in Plant Species Biology.