Threatened herbivorous insects maintained by long-term traditional management practices in semi-natural grasslands

Uchida, Keiji; Takahashi, Sogo; Shinohara, Tadashi; Ushimaru, Atushi

doi:10.1016/j.agee.2016.01.036

Cited by 48 publications

(26 citation statements)

References 38 publications

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“…Many grasshopper species, which are important primary and secondary consumers in grasslands (Ingrisch and Köhler 1998), are tightly bound to their habitat, react very sensitively to environmental changes (Baur et al 2006b) and are prone to grassland abandonment Uchida et al 2016). They are suitable indicators for land-use change as they show a clear response to succession (Fartmann et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Diversity of bumblebees, heteropteran bugs and grasshoppers maintained by both: abandonment and extensive management of mountain meadows in three regions across the Austrian and Swiss Alps

et al. 2017

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Context Abandonment of extensively managed meadows is an ongoing global challenge in recent decades, particularly in mountain regions, and directly affects plant diversity. However, the extent to which plant diversity further affects associated insect pollinators or herbivores is little investigated. Objectives We focused on the effects of abandonment of mountain meadows on species richness and assemblages of bumblebees, bugs and grasshoppers. Specifically, we investigated the influence of vegetation cover, flower cover, plant richness and surrounding landscape on the three insect groups.Methods Species richness, abundance and species assemblages of bumblebees, bugs and grasshoppers were surveyed in one Swiss and two Austrian regions: three meadows which had been abandoned for 15-60 years, and three extensively managed meadows (mown once a year, no use of fertilizers). We surveyed bumblebees and bugs by sweep net, and grasshoppers using the time-effective soundscape approach. Results Bumblebee species richness and abundance were significantly higher in managed meadows, whereas bug and grasshopper richness and abundance showed no differences between both management types. Managed and abandoned meadows harboured significantly different species assemblages of bugs and grasshoppers, but not of bumblebees. Increasing flower cover and plant richness increased bumblebee 123Landscape Ecol (2017) 32:1937-1951 DOI 10.1007 richness, but correlated negatively with richness of bugs. Surrounding open landscape positively affected bugs. Caelifera positively correlated with surrounding forest cover and negatively with vegetation cover. Vegetation cover positively affected Ensifera. Conclusions Abandoned and extensively managed meadows are important habitat types for the conservation of the three insect groups, thus suggesting the maintenance of both habitat types within mountain landscapes.

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Section: Introductionmentioning

confidence: 99%

Diversity of bumblebees, heteropteran bugs and grasshoppers maintained by both: abandonment and extensive management of mountain meadows in three regions across the Austrian and Swiss Alps

et al. 2017

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“…Semi‐natural grasslands of the study area also harbor diverse threatened and endangered insect and plant species (Uchida et al . ). National and local governmental support for the appropriate management of semi‐natural grasslands is beneficial for biodiversity conservation at both the local (e.g.…”

Section: Discussionmentioning

confidence: 97%

Rediscovery of Celes akitanus (Orthoptera: Acrididae) from semi‐natural grasslands in Japan

Uchida

Shinohara

Takahashi

et al. 2016

Entomological Science

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Celes akitanus was rediscovered in semi‐natural grasslands in Japan. This species is one of the most endangered insects in Japan; most local populations were thought to be extinct. Reliable records of this rare species had been obtained only from Yamagata, Niigata, Tokyo and Nagano Prefectures. We compared the morphology of the holotype of Oedipoda akitana (=C. akitanus) and newly collected specimens and found that they matched with each other. The species was redescribed based on the holotype and new specimens. A molecular phylogenetic analysis involving other acridid species indicated that our samples were practically identical to C. akitanus from China. We conclude that the specimens we collected are C. akitanus, which has been rediscovered in Japan after about 30 years. Because the discovered populations were restricted to narrow and scattered areas, conservation of these populations should be a high priority. Population monitoring and habitat assessment are required. Because C. akitanus and many other endangered species are found in the grassland areas, these habitats should be protected and maintained.

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“…; Uchida & Ushimaru ; Uchida et al. ). Furthermore, considering the rapid global increase of abandoned land (Cramer et al.…”

Section: Introductionmentioning

confidence: 98%

“…Land abandonment is considered to provide opportunities to establish protected areas and to regenerate degraded native ecosystems (Mittermeier et al 2003;Queiroz et al 2014). However, land abandonment can also have negative consequences for biodiversity in regions that have a long history of anthropogenic disturbance in which biodiversity is supported by species that adapt to the disturbance (Kotowski et al 2013;Uchida & Ushimaru 2014;Uchida et al 2016). Furthermore, considering the rapid global increase of abandoned land (Cramer et al 2008;Queiroz et al 2014), a better understanding of successional processes in abandoned land is needed to evaluate biodiversity in the future.…”

Section: Introductionmentioning

confidence: 99%

Water depletion drives plant succession in farm ponds and overrides a legacy of continuous anthropogenic disturbance

Toyama

Akasaka

2017

Applied Vegetation Science

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Questions Abandonment of anthropogenic ecosystems threatens biodiversity in rural areas globally. Successional responses in anthropogenic ecosystems have been shown to differ from those in natural ecosystems because of the legacy of continuous management activities. However, few studies have focused on successional changes in anthropogenic freshwater ecosystems following abandonment. Focusing on two drivers (water depletion and cessation of anthropogenic disturbance), we tested whether water depletion plays a larger role than years since abandonment in determining the both plant functional diversity and composition in farm ponds. Location Awaji Island, western Japan. Methods We investigated flora at 200 farm ponds, which had experienced long‐term continuous anthropogenic disturbance. We interviewed 100 managers of the surveyed ponds and local farmers to identify the ponds’ management status. To capture community processes during succession, we focused on functional richness and functional trait composition. We assessed the relative contribution of the two successional drivers in determining functional richness by adopting a linear model. We classified the survey ponds into five groups based on the two successional drivers and performed PERMANOVA to test differences in functional composition among the groups. Results Water depletion played a larger role than elapsed time since cessation of anthropogenic disturbance in determining functional richness. Functional composition of water‐depleted ponds significantly differed from that of managed ponds, regardless of years since abandonment. Conclusions Our results indicate that water depletion has a larger effect on successional changes in ponds than cessation of anthropogenic disturbance; that is, water depletion drives succession and overrides the legacy of continuous anthropogenic disturbance. The results suggest that, in freshwater ecosystems, the functional change in a community is greater in the transition from macrophytes to terrestrial plants than it is in the transition from stress‐tolerant species to competitive species.

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Threatened herbivorous insects maintained by long-term traditional management practices in semi-natural grasslands

Cited by 48 publications

References 38 publications

Diversity of bumblebees, heteropteran bugs and grasshoppers maintained by both: abandonment and extensive management of mountain meadows in three regions across the Austrian and Swiss Alps

Diversity of bumblebees, heteropteran bugs and grasshoppers maintained by both: abandonment and extensive management of mountain meadows in three regions across the Austrian and Swiss Alps

Rediscovery of Celes akitanus (Orthoptera: Acrididae) from semi‐natural grasslands in Japan

Water depletion drives plant succession in farm ponds and overrides a legacy of continuous anthropogenic disturbance

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