Short and flat grass preferred by adults of the endangered dragonfly Sympetrum pedemontanum elatum (Odonata: Libellulidae)

Higashikawa, Wataru; Yoshimura, Mayumi; Yagi, Tsuyoshi; Maetô, Kaoru

doi:10.1007/s13355-017-0514-z

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…It is unlikely that adult odonates would be associated with a particular plant species, as are some pollinators and herbivores; more likely, they respond to such specific properties of vegetation as structure and density (Buchwald ; Foote & Hornung ; Higashikawa et al ). In this study, we recorded the plants on which S. depressiusculum adults roosted by classifying them only into monocots or dicots, on the assumption that the species may be able to discriminate these two groups of plants based on their structural properties.…”

Section: Discussionmentioning

confidence: 99%

Diel changes in habitat use by dragonflies: Nocturnal roosting site selection by the threatened dragonfly Sympetrum depressiusculum (Odonata: Libellulidae)

Hykel

Harabiš

Dolný

2017

Entomological Science

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Although it is well recognized that insects' habitat use and requirements may change during the season, very little attention has been devoted to diel habitat changes in most insects. In this study, we compared habitat utilization patterns of Sympetrum depressiusculum (Selys, 1841) adult dragonflies between daytime activities and nocturnal roosting. During daytime, we captured and marked adult individuals with fluorescent paint in different habitats. At night, we searched, using UV light, for marked individuals that remained on the habitats. We found that habitat selection for daytime activities and that for nocturnal roosting differed significantly. Adults clearly avoided ponds and their immediate surroundings for nocturnal roosting, whereas this habitat type was frequently utilized for daytime activities. We suggest that nocturnal avoidance of the riparian area is associated with lower temperatures, which adversely affect thermoregulation, and that selection of specific habitats for nocturnal roosting is closely associated with vegetation structure providing stability during windy nights and serving as a suitable shelter. Such habitat properties are found especially on fallow land, a habitat type whose representation in agricultural areas has been gradually decreasing in recent decades.

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Section: Discussionmentioning

confidence: 99%

Diel changes in habitat use by dragonflies: Nocturnal roosting site selection by the threatened dragonfly Sympetrum depressiusculum (Odonata: Libellulidae)

Hykel

Harabiš

Dolný

2017

Entomological Science

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Forest expansion affects Odonata assemblage in floodplain: a case study in the Kiso River, central Japan

Higashikawa,

Matsuzawa,

Mori

2024

Limnology

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In floodplains, which are highly modified and less inundated, trees are expanding, thus raising concerns regarding their impact on freshwater organisms. We analyzed the relationship between forest expansion and the change in Odonata (dragonflies and damselflies) assemblage over an extended period of time in the floodplain with ponds of the Kiso River, central Japan. In the 1970s, the ponds were mainly surrounded by grasslands, and approximately 80% of Odonata species were non-forest species. However, the number of forest species increased and that of non-forest species largely decreased with the forest expansion over the past five decades, resulting in almost a similar number of forest and non-forest species in 2021. Whereas the abundance of the non-forest species had been greater than that of the forest species until the 2000s, the difference has been much smaller in the 2010s, and the non-forest species occupied approximately only 30% of the number of individuals in 2021. The forest expansion may have reduced the open-lentic habitats for the non-forest species, which require riparian grasslands for resting, foraging, and reproduction, and may disturb the immigration of non-forest species from the adjacent rice paddy fields and rivers. The development of canopy cover over the waterbodies may have decreased the light and temperature above and within the ponds, which might have caused a decline in species that prefer warm and open-water environments. Maintaining shifting-mosaic patterns of vegetation around the floodplain waterbodies through active management may be effective in conserving floodplain Odonata communities, including both forest and non-forest species.

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Conservation genomics of an endangered floodplain dragonfly, Sympetrum pedemontanum elatum (Selys), in Japan

Higashikawa,

Yoshimura,

Nagano

et al. 2023

Conserv Genet

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Short and flat grass preferred by adults of the endangered dragonfly Sympetrum pedemontanum elatum (Odonata: Libellulidae)

Abstract: Short and flat grass preferred by adults of the endangered dragonfly Sympetrum pedemontanum elatum (Odonata: Libellulidae

Cited by 4 publications

References 25 publications

Diel changes in habitat use by dragonflies: Nocturnal roosting site selection by the threatened dragonfly Sympetrum depressiusculum (Odonata: Libellulidae)

Diel changes in habitat use by dragonflies: Nocturnal roosting site selection by the threatened dragonfly Sympetrum depressiusculum (Odonata: Libellulidae)

Forest expansion affects Odonata assemblage in floodplain: a case study in the Kiso River, central Japan

Conservation genomics of an endangered floodplain dragonfly, Sympetrum pedemontanum elatum (Selys), in Japan

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