Effects of climatic conditions on the northward expansion of the wintering range of the Greater White-fronted Goose in Japan

Shimada, Takehiko; Hatakeyama, Shouji; Miyabayashi, Y.; Kurechi, Masayuki

doi:10.2326/osj.4.155

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…As a result, the population is now mainly concentrated at Poyang and Shengjin Lakes where they are associated with extensive areas of Carex meadow, which is their preferred food (Zhao et al 2012). In Japan, the main non-breeding range of Greater White-fronted Goose includes the Miyagi, Niigata, Ishikawa and Shimane prefectures, where numbers have been increasing dramatically and extending northwards (Takekawa et al 2000, Shimada et al 2005). The total number of geese counted increased from 31,740 in 1996 to 156,231 in 2011.…”

Section: Discussionmentioning

confidence: 99%

Population estimates and geographical distributions of swans and geese in East Asia based on counts during the non-breeding season

Jia

Koyama²,

Choi

et al. 2016

Bird Conservation International

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SummaryFor the first time, we estimated the population sizes of two swan species and four goose species from observations during the non-breeding period in East Asia. Based on combined counts from South Korea, Japan and China, we estimated the total abundance of these species as follows: 42,000–47,000 Whooper SwansCygnus cygnus; 99,000–141,000 Tundra SwansC. columbianus bewickii; 56,000–98,000 Swan GeeseAnser cygnoides; 157,000–194,000 Bean GeeseA. fabalis; 231,000–283,000 Greater White-fronted GeeseA. albifrons; and 14,000–19,000 Lesser White-fronted GeeseA. erythropus.While the count data from Korea and Japan provide a good reflection of numbers present, there remain gaps in the coverage in China, which particularly affect the precision of the estimates for Bean, Greater and Lesser White-fronted Geese as well as Tundra Swans. Lack of subspecies distinction of Bean Geese in China until recently also limits our ability to determine the true status ofA. f. middendorffiithere, but all indications suggest this population numbers around 18,000 individuals and is in need of urgent attention. The small, highly concentrated and declining numbers of Lesser White-fronted Geese give concern for this species, as do the major declines in Greater White-fronted Geese in China (in contrast to numbers in Japan and Korea, considered to be a separate flyway). In the absence of any demographic data, it is impossible to interpret the causes of these changes in abundance. Improved monitoring, including demographic and tracking studies are required to provide the necessary information to retain populations in favourable conservation status.

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Section: Discussionmentioning

confidence: 99%

Population estimates and geographical distributions of swans and geese in East Asia based on counts during the non-breeding season

Jia

Koyama²,

Choi

et al. 2016

Bird Conservation International

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“…During the winter period from 2017 to 2018, we divided the wintering season (October 2017 to early April 2018) into three periods: early, from October to December; middle, from December to February; and late, from February to April, depending on the phenology and stable numbers of the Greater White-fronted Geese (Shimada et al 2005). Based on relevant literature and field investigation, we divided the foraging habitats during the wintering season into three types: meadows, mudflats, and paddy fields.…”

Section: Food Resources Surveymentioning

confidence: 99%

Foraging behavior of the Greater White-fronted Goose (Anser albifrons) wintering at Shengjin Lake: diet shifts and habitat use

et al. 2020

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Background: The habitat use and foraging behaviors of waterbirds are closely related to the distribution and abundance of their food resources. Reductions in food supply can cause waterbirds to shift their habitats and adjust their foraging behaviors to meet their nutritional requirements and increase fitness. Seasonal withdraw of the water levels in the river-connected lakes in the middle and lower Yangtze River floodplain provides abundant food resources for the wintering Greater White-fronted Goose (Anser albifrons). Sedge (Carex) meadows are critical foraging habitats for herbivorous waterbirds in the hydro-fluctuation belt, which changes with hydrological conditions and climate. This study aimed to examine the behavioral responses of the Greater White-fronted Goose to temporal-spatial changes of food availability in the Sedge meadows. Methods: Fields surveys were carried out at Shengjin Lake from November 2017 to April 2018. According to the phenology of Shengjin Lake, we divided the wintering season into three periods. The food density, minimum temperature, food items, grass height, and number of foraging geese were surveyed, and samples of the foraging behavior were collected. We analyzed the relationship of the foraging behavior and habitat use relative to the food resources, using correlation and linear regression analyses. Results: Along with the temporal-spatial variation and exploitation of food resources, the food abundance and items varied widely among the foraging sites. Over the whole wintering period, the foraging habitat with the highest utilization rate was the meadows, followed by the paddy fields, and then mudflats. Furthermore, the utilization of the meadows showed a bimodal distribution trend, while the paddy fields showed a unimodal trend, and a decreasing trend was seen in the mudflats over the whole wintering period. The results of the generalized linear model showed that the foraging rate was related to the food density and grass height, with a linearly increasing trend during the winter. Conclusions: With the change of food resources in the three habitats, the habitats used by the Greater White-fronted Geese shifted from meadows in the hydro-fluctuation belt to the paddy fields, and then back to the meadows. The time budget for foraging activities increased correspondingly, and there was an increase in the foraging rate to compensate for food shortages.

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“…2). Shimada et al (2005) detected that weather in November and December was relatively mild and this probably allowed geese to remain in northern Akita, while severe weather conditions in January forced birds to move to more southern areas. In winter 2005/2006, several severe cold air masses passed over northern Honshu, causing prolonged periods when roost site lakes were frozen and heavy snow affected foraging areas during December 2005 (Shimada & Ueda 2006).…”

Section: Resultsmentioning

confidence: 99%

Current Status and Distribution of Greater White-Fronted Goose in Japan

Shimada

2009

Ornithological Science

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Effects of climatic conditions on the northward expansion of the wintering range of the Greater White-fronted Goose in Japan

Cited by 7 publications

References 8 publications

Population estimates and geographical distributions of swans and geese in East Asia based on counts during the non-breeding season

Population estimates and geographical distributions of swans and geese in East Asia based on counts during the non-breeding season

Foraging behavior of the Greater White-fronted Goose (Anser albifrons) wintering at Shengjin Lake: diet shifts and habitat use

Current Status and Distribution of Greater White-Fronted Goose in Japan

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