著者

Makoto HASEBE Masayuki SENZAKI

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.21, no.1, pp.115-119, 2022 (Released:2022-01-31)

参考文献数

8

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Pallas's Reed Bunting Emberiza pallasi was confirmed to be breeding in grassland at the Volchinka River mouth, Northern Sakhalin, Russia, in July 2019. The density of the species was 0.17 territories/ha. The observed individuals were identified as either E. p. polaris or E. p. pallasi based on their morphological characteristics and geographical location. Two nests and two fledglings were discovered. This is the first evidence of this species breeding on Sakhalin Island. Since northern Sakhalin is several hundred to a thousand kilometres away from the previous known breeding range, our study suggests a possible range expansion of this species.

著者

Munehiro Kitazawa Yuichi Yamaura Masayuki Senzaki Kazuhiro Kawamura Masashi Hanioka Futoshi Nakamura

出版者

The Ornithological Society of Japan

雑誌

ORNITHOLOGICAL SCIENCE (ISSN:13470558)

巻号頁・発行日

vol.18, no.1, pp.3-16, 2019 (Released:2019-01-29)

参考文献数

58

被引用文献数

18

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Populations of birds inhabiting wetlands and grasslands are decreasing globally due to farmland expansion and subsequent agricultural intensification. In addition to conserving natural habitats, managing cultivated farmland and abandoned farmland are likely to be important future conservation measures; however, their relative suitability as avian habitat remains understudied. In this study, we evaluated five habitat types (wetland, pasture, cropland, abandoned farmland, and solar power plant) for openland birds in an agricultural landscape in central Hokkaido, northern Japan. Abandoned farmlands had bird species richness and total bird abundance values similar to those of wetlands. These values were generally higher in abandoned farmlands and wetlands than in croplands, pastures, and solar power plants. The per pair reproductive success of Stejneger's Stonechat Saxicola stejnegeri and the amount of its prey (arthropods) did not differ among the five habitat types. Three species (Black-browed Reed Warbler Acrocephalus bistrigiceps, Common Reed Bunting Emberiza schoeniclus, and Japanese Bush Warbler Cettia diphone) arrived earlier in wetlands than in other habitat types. These results suggest that, although protecting the remaining wetlands is of prime importance for the conservation of openland birds in agricultural landscapes, valuing and managing abandoned farmlands would be a promising alternative.