Comparative pollination biology in two sympatric varieties of <i><scp>C</scp>ypripedium macranthos</i> (<scp>O</scp>rchidaceae) on <scp>R</scp>ebun <scp>I</scp>sland, <scp>H</scp>okkaido, <scp>J</scp>apan

Sugiura, Norío; Takahashi, Hideki

doi:10.1111/1442-1984.12055

Cited by 7 publications

(11 citation statements)

References 21 publications

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“…Wandering of young bumblebee queens among different populations of C. macranthos var. rebunense is expected (Sugiura and Takahashi 2014), and considering their size, fungal flora will differ among sites at a microscale.…”

Section: Discussionmentioning

confidence: 99%

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Vegetation factors influencing the establishment and growth of the endangered Japanese orchid, Cypripedium macranthos var. rebunense

Kosaka

Kawahara

Takahashi

2014

Ecological Research

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Cypripedium macranthos var. rebunense is a well‐known endangered terrestrial orchid that is endemic to the cool‐temperate Rebun Island off the coast of northwestern Hokkaido, Japan. The present study aimed to identify suitable methods for conservation of this orchid through management of the natural vegetation. We analyzed the vegetation types and plants growing sympatrically with this orchid using two‐way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DCA) ordination. Reproductive orchids can survive in various broad‐leaved and short to medium‐height herbaceous meadows with high plant species richness at a small scale in coastal regions. In order to maintain C. macranthos var. rebunense populations, succession to dense and tall large‐leaved herbs, Sasa scrub, shrubs, and trees, should be suppressed. Favorable vegetation for the establishment of seedlings of this orchid includes narrow‐leaved, medium‐sized grasses, sedges, herbs, mosses, and prostrate mat‐forming shrubs. The ground cover offered by these plants and their litter may favor stability of moisture, temperature, and suitable light conditions at the ground surface. In situ seed sowing at such ‘safe sites’ is a potential low‐impact technique to enhance seedling recruitment of this orchid.

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Section: Discussionmentioning

confidence: 99%

“…On Rebun Island, purple-flowered C. macranthos individuals also occur, but they are much rarer than the popular pale-cream-flowered C. macranthos var. rebunense (Sugiura and Takahashi 2014).…”

Section: Study Speciesmentioning

confidence: 99%

Vegetation factors influencing the establishment and growth of the endangered Japanese orchid, Cypripedium macranthos var. rebunense

Kosaka

Kawahara

Takahashi

2014

Ecological Research

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“…macranthos flowers were very rare (8–48 flowers per year in two protected areas for var. rebunense [Sugiura & Takahashi, ]), compared to several thousand var rebunense flowers (Kosaka, Kawahara, & Takahashi, ; N. Sugiura, personal observation, 2004–2013), and their annual fruit‐set ratios were also generally low (Sugiura & Takahashi, ), almost all pollen‐smear‐laden queens were considered to be flower visitors of var. rebunense .…”

Section: Methodsmentioning

confidence: 99%

“…macranthos flowers were very rare (8-48 flowers per year in two protected areas for var. rebunense [Sugiura & Takahashi, 2015]), compared to several thousand var rebunense flowers (Kosaka, Kawahara, & Takahashi, 2014;N. Sugiura, personal observation, 2004N.…”

Section: Methodsmentioning

confidence: 99%

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Consistent pollination services to Cypripedium macranthos var. rebunense (Orchidaceae) by Bombus pseudobaicalensis

Sugiura

2019

Plant Species Biology

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Bombus pseudobaicalensis queens are known pollinators of the threatened orchid Cypripedium macranthos var. rebunense. However, whether other bumblebee species also pollinate this orchid has not yet been ascertained. A 10‐year observation provided convincing evidence that B. pseudobaicalensis is the only consistent pollinator. B. beaticola moshkarareppus queens were newly found to rarely carry pollen smears of the orchid, whereas B. hypocrita sapporoensis and B. diversus queens were practically mere flower visitors. Why these three species do not equal B. pseudobaicalensis in pollination effectiveness remains unclear but differences in body size and individual abundance between B. pseudobaicalensis and the other species are considered as possible primary causes. Given the almost complete dependence of C. macranthos var. rebunense on B. pseudobaicalensis for pollination and its potential risk, conservation managers should take care not to reduce the bumblebee colonies.

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Middle Pleistocene climate change influenced northward divergence and cold adaptation in an Asian lady’s slipper orchid, Cypripedium macranthos Sw. (Orchidaceae)

Chang,

Zhang,

Andronova

et al. 2024

Botanical Journal of the Linnean Society

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The Pleistocene was characterized by climate fluctuations with rapid transitions between glacial and interglacial periods. East Asia’s land bridge dynamics and monsoon system during the Middle Pleistocene transition (MPT) further constrained species distributions and dispersals, which promoted local adaptation and species diversification, making East Asia an excellent location to study species biogeography. Cypripedium macranthos Sw., a terrestrial orchid, diverged in the Pleistocene and became widespread in Russia, China, Korea, and Japan. Many populations are now at risk due to illegal harvesting or habitat loss. With comprehensive sampling including 171 individuals among 22 populations across the entire distribution range, together with plastid DNA sequencing, we have explored the origin and impact of palaeoclimate on its spatial genetic structure and historical biogeography. Regression-based analyses commonly used in landscape genetics were also applied to investigate the effects of precipitation, temperature, and wind on gene flow. The results revealed northeastern China as the probable cradle of C. macranthos, with northeastward divergence and range expansion during the MPT, aided by monsoon shifts and wind-driven seed dispersal. Isolation by environment was detected with winter temperature as a driver for north–south divergence controlling for an effect of isolation by distance, revealing cold adaptation of the northern populations or temperature-driven genetic differentiation. We also emphasize the founder speciation of an unique variety on Rebun Island of Japan. The widespread but genetically and ecologically divergent C. macranthos populations highlight the need for more conservation attention on northern populations under global warming.

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Comparative pollination biology in two sympatric varieties of Cypripedium macranthos (Orchidaceae) on Rebun Island, Hokkaido, Japan

Cited by 7 publications

References 21 publications

Vegetation factors influencing the establishment and growth of the endangered Japanese orchid, Cypripedium macranthos var. rebunense

Vegetation factors influencing the establishment and growth of the endangered Japanese orchid, Cypripedium macranthos var. rebunense

Consistent pollination services to Cypripedium macranthos var. rebunense (Orchidaceae) by Bombus pseudobaicalensis

Middle Pleistocene climate change influenced northward divergence and cold adaptation in an Asian lady’s slipper orchid, Cypripedium macranthos Sw. (Orchidaceae)

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