Diurnal Time-Activity Budgets of Wintering Hooded Cranes (<i>Grus monacha</i>) in Shengjin Lake, China

Zhou, Bo; Zhou, Lizhi; Chen, Jinyun; Cheng, Yuanqi; Xu, Wenbin

doi:10.1675/063.033.0114

Cited by 32 publications

(54 citation statements)

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“…For analysis of daily activity rhythms, the data were further subdivided into a 1-hr time block. The use of a large block of time (1 hr) to divide the day provides a suitable separation for statistical comparison (Natalie 2005;Zhou et al 2010). Independent-sample t-tests were used to compare the percentages of each activity between the summer and winter seasons for all activity data that met the conditions of independence and normality (SPSS, Inc. 2009).…”

Section: Discussionmentioning

confidence: 99%

Habitat Utilization, Time Budget and Daily Rhythm of Ibisbill (Ibidorhyncha struthersii) in Daocheng County, Southwest China

Ye¹,

Davison²,

Zhu³

et al. 2013

Waterbirds

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Section: Discussionmentioning

confidence: 99%

Habitat Utilization, Time Budget and Daily Rhythm of Ibisbill (Ibidorhyncha struthersii) in Daocheng County, Southwest China

Ye¹,

Davison²,

Zhu³

et al. 2013

Waterbirds

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“…However, rising levels of human intervention and destruction over the last thirty years Fox et al 2011) are largely responsible for the increasing degeneration and loss of lake wetlands, resulting in the decline of suitable habitats for waterbirds in the Yangtze River floodplains (Zhou et al 2010;Jia et al 2013), possibly exerting far-reaching effects on the networks and services for waterbirds, which are experiencing dramatic changes in this ecosystem Chen et al 2011). The relationship between waterbirds, especially for migratory waders, in the fluctuations in hydrology and their food supply within or between patches across the seasons, has been enhanced and drawn increasing attention to wetland networks (Beerens et al 2011;Link et al 2011;Jia et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The Hooded Crane (Grus monacha) is a migratory wader in East Asia, breeding in forests and meadows in the Far East of Russia and the northeast of China (Meine and Archibald 1996;Zhou et al 2010) and wintering in the wetlands of Korea, Japan and the middle and lower reaches of the Yangtze River in China (Ohsako 1994;Collar et al 2001;Ma et al 2003). It is a vulnerable (VU) species, classified as a first-class national protected wild animal in China's wildlife protection list (Meine and Archibald 1996;Zhou et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…It is a vulnerable (VU) species, classified as a first-class national protected wild animal in China's wildlife protection list (Meine and Archibald 1996;Zhou et al 2010). The Chinese wintering populations are largely found in two adjacent shallow lakes, i.e., the Shengjin and Caizi lakes, in the middle and lower Yangtze River floodplains, which support two-thirds of the Chinese population (Ma et al 2003;Zhou et al 2010). In these lake wetlands, Vallisneria natans, Potamogeton malaianus and mollusks are the main food resources for the Hooded Crane.…”

Section: Introductionmentioning

confidence: 99%

“…In these lake wetlands, Vallisneria natans, Potamogeton malaianus and mollusks are the main food resources for the Hooded Crane. Owing to the degradation and loss of these lake wetlands, the cranes have changed their dietary structure (Zhou et al 2010) and are declining in number (Harris et al 2000;Zhao et al 2013). Although some recent studies have revealed considerable flexibility in wader habitat use (Puglisi et al 2005;White et al 2006), including Grus species (Liu et al 2010;Li et al 2013), this flexibility of habitat use by larger migratory waders is regional and species-specific (Ma et al 2003;Aborn 2010;Liu et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effects of variation in food resources on foraging habitat use by wintering Hooded Cranes (Grus monacha)

et al. 2015

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Background: The ideal habitat use of waterbirds can be considered to be fixed, but current habitat use depends on environmental conditions, especially those of food characteristics, considered crucial to their use of habitats. Understanding how waterbirds respond to variation in food availability at degraded wetland sites and change their habitat use patterns over spatial and temporal scales should direct future conservation planning. The objectives of this study were to identify these spatial-temporal foraging habitat use patterns of Hooded Cranes (Grus monacha) and their relationship with food characteristics in the severely degraded wetlands of the Shengjin and Caizi lakes along with the Yangtze River floodplain. Methods: We investigated the changes in food characteristics, relative abundance and density of Hooded Cranes in various habitat types across three winter periods from November 2012 to April 2013. We examined the effect of these winter periods and habitat types on the pattern of use by the cranes and explored the relationship between these patterns and food characteristics using linear regression. Results: The food characteristics and habitat use clearly changed over spatial-temporal scales. In the early and mid-winter periods, the most abundant, accessible and frequented food resources were found in paddy fields, while in the late period the more abundant food were available in meadows, which then replaced the paddy fields. There were fewer effects of winter periods, habitat types and their interactions on habitat use patterns except for the effect of habitat types on the relative abundance, determined as a function of food abundance, but independent of food depth and sediment permeability. Conclusions: In response to the degradation and loss of lake wetlands, the cranes shifted their habitat use patterns by making tradeoffs between food abundance and accessibility over spatial-temporal scales that facilitated their survival in the mosaic of these lake wetlands.

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Winners and losers of land use change: A systematic review of interactions between the world’s crane species (Gruidae) and the agricultural sector

Hemminger

König

Månsson

et al. 2022

Ecology and Evolution

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While agricultural intensification and expansion are major factors driving loss and degradation of natural habitat and species decline, some wildlife species also benefit from agriculturally managed habitats. This may lead to high population densities with impacts on both human livelihoods and wildlife conservation. Cranes are a group of 15 species worldwide, affected both negatively and positively by agricultural practices. While eleven species face critical population declines, numbers of common cranes (Grus grus) and sandhill cranes (Grus canadensis) have increased drastically in the last 40 years. Their increase is associated with higher incidences of crane foraging on agricultural crops, causing financial losses to farmers. Our aim was to synthesize scientific knowledge on the bilateral effects of land use change and crane populations. We conducted a systematic literature review of peer‐reviewed publications on agriculture‐crane interactions (n = 135) and on the importance of agricultural crops in the diet of cranes (n = 81). Agricultural crops constitute a considerable part of the diet of all crane species (average of 37%, most frequently maize (Zea mays L.) and wheat (Triticum aestivum L.)). Crop damage was identified in only 10% of all agriculture‐crane interactions, although one‐third of interactions included cranes foraging on cropland. Using a conceptual framework analysis, we identified two major pathways in agriculture‐crane interactions: (1) habitat loss with negative effects on crane species dependent on specific habitats, and (2) expanding agricultural habitats with superabundant food availability beneficial for opportunistic crane species. The degree to which crane species can adapt to agricultural land use changes may be an important factor explaining their population response. We conclude that multi‐objective management needs to combine land sparing and land sharing strategies at landscape scale. To support viable crane populations while guaranteeing sustainable agricultural production, it is necessary to include the perspectives of diverse stakeholders and streamline conservation initiatives and agricultural policy accordingly.

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Diurnal Time-Activity Budgets of Wintering Hooded Cranes (Grus monacha) in Shengjin Lake, China

Cited by 32 publications

References 11 publications

Habitat Utilization, Time Budget and Daily Rhythm of Ibisbill (Ibidorhyncha struthersii) in Daocheng County, Southwest China

Habitat Utilization, Time Budget and Daily Rhythm of Ibisbill (Ibidorhyncha struthersii) in Daocheng County, Southwest China

Effects of variation in food resources on foraging habitat use by wintering Hooded Cranes (Grus monacha)

Winners and losers of land use change: A systematic review of interactions between the world’s crane species (Gruidae) and the agricultural sector

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