Foraging habitats and utilization distributions of Black-necked Cranes wintering at the Napahai Wetland, China

Liu, Qiang; Yang, Jing; Yang, Xuefei; Zhao, Jianshi; HongZhong, Yu

doi:10.1111/j.1557-9263.2009.00257.x

Cited by 21 publications

(19 citation statements)

References 30 publications

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“…The NP supports c . 115 species of wetland plants that belong to 38 families and 82 genera (Xiao et al ., ; Liu et al ., ), and it is also an important over‐wintering and breeding site for migratory birds in China; more than 60 wintering water bird species are found in this area (Tian, Guo & Yang, ; Liu et al ., ). The second site is located at the Lashihai wetland (LS), with an elevation of 2437 m and a mean annual temperature of c .…”

Section: Methodsmentioning

confidence: 97%

Long‐term responses of leaf litter decomposition to temperature, litter quality and litter mixing in plateau wetlands

et al. 2016

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Summary Decomposition of plant litter is a key process in the flow of energy and nutrients in ecosystems. The extent and mechanisms towards which climate warming will affect litter decomposition in plateau wetlands remains largely unknown. We conducted a two‐year litter decomposition experiment along an elevation gradient from 1891 to 3260 m in China using litter from two dominant species of plateau wetland plants to determine the influences of temperature, litter quality and litter mixing on decomposition. The decomposition rate was significantly correlated with water temperature during the plant growing seasons and with litter quality during the winters. The temperature sensitivity of litter decomposition (Q10) was c. 3.02 along the elevation gradient, but mixed litter was more sensitive to temperature than the litter of either Scirpus tabernaemontani (grey club‐rush: Cyperaceae) or Zizania caduciflora (wild rice: Gramineae) alone. The concentration of nitrogen (N) and the ratio of N:P (phosphorus) had positive effects but the concentration of carbon (C) and the ratios of C:N and lignin:N had negative effects on the decomposition rate, especially during the winter. In addition, N concentration and the ratio of C:N were more significantly correlated with decomposition rate during the first winter, while the ratio of lignin:N was more significantly correlated with decomposition during the second winter. Consequently, climate warming may significantly impact biogeochemical cycling of plateau wetlands, notably C storage.

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Section: Methodsmentioning

confidence: 97%

Long‐term responses of leaf litter decomposition to temperature, litter quality and litter mixing in plateau wetlands

et al. 2016

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“…This method is more appropriate than parametric kernel methods for constructing utilization distributions and can capture hard boundaries (e.g., rivers and cliff edges) and process large sample sizes (Getz et al, 2007). This method is also very powerful in processing aggregated and clustered data (Getz & Wilmers, 2004) at the population level (Liu et al, 2010). Thus, we constructed kernels with the fixed radius local convex hull ( r -LoCoH) method (available at ) using flock location data within a fixed 500 m radius, which was sufficient to distinguish flocks of the two-crane species.…”

Section: Methodsmentioning

confidence: 99%

“…For example, Li (1999) observed that 54.4%, 26.8%, 11.4%, and 7.3% of cranes from the Caohai Reserve, Guizhou Province, were distributed in sedge meadow, farmland, shallow marshland, and grassland, respectively. Conversely, Liu et al (2010), who studied the winter foraging habitat utilization of black-necked cranes in Napahai Reserve, southwestern Yunnan, indicated that 75.2% of cranes used shallow marshland, whereas only 6.7% of cranes were observed in farmland. However, Kong et al (2011) reported that wintering black-necked cranes in Dashanbao Reserve, northeastern Yunnan, most often utilized farmland (55.1%) and concluded that landscape differences between wintering sites resulted in the observed differences in wintering habitat use.…”

Section: Introductionmentioning

confidence: 99%

Habitat use, preference, and utilization distribution of two crane species (Genus: Grus) in Huize National Nature Reserve, Yunnan–Guizhou Plateau, China

Kong

Luo

Liu

et al. 2018

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Understanding the habitat use and spatial distribution of wildlife can help conservationists determine high-priority areas and enhance conservation efforts. We studied the wintering habitat use, preference, and utilization distribution of two crane species, that is, the black-necked crane (Grus nigricollis, Przevalski, 1876) and common crane (Grus grus, Linnaeus, 1758), in Huize National Natural Reserve, Yunnan–Guizhou Plateau, southwestern China. Line transects indicated that anthropogenic farmland habitat was highly utilized and was positively selected by both crane species (>90% of flocks observed for both species). Black-necked cranes preferred marshland in spring (February and March) but avoided grassland during the entire wintering period, whereas common cranes avoided both marshland and grassland throughout the entire period. The two cranes species had communal nightly roosting sites and separate daily foraging sites. Black-necked cranes were distributed within two km (1.89 ± 0.08 km) of the roosting site, covering an area of 283.84 ha, with the core distribution area encompassing less than 100 ha. In contrast, common cranes were distributed far from the roosting site (4.38 ± 0.11 km), covering an area of 558.73 ha, with the core distribution area encompassing 224.81 ha. Thus, interspecies competition may have influenced the habitat preference and spatial distribution divergence of these two phylogenetically related species. This study should help guide habitat management as well as functional zoning development and adjustment in the future. Based on our results, we recommend restoration of additional wetlands, retention of large areas of farmland, and protection of areas that cranes use most frequently.

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“…However, the relative abundance and density are not closely related to and restricted by the depth of food and sediment permeability. Their various foraging techniques and powerful bills enable the cranes not only to pick up rice grains on the ground and probe mollusks under swamps, but also excavate the roots and tubers from the soil (Ohsako 1994;Liu et al 2010;Jia et al 2013). By consuming the various food items, cranes selectively exploit habitat from shallower and swampier sediments for more energy and nutrition intake with less foraging effort (Wang 1988;Liu et al 2010).…”

Section: Effects Of Food Characteristics On Foraging Habitat Usementioning

confidence: 99%

“…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%

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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Foraging habitats and utilization distributions of Black-necked Cranes wintering at the Napahai Wetland, China

Cited by 21 publications

References 30 publications

Long‐term responses of leaf litter decomposition to temperature, litter quality and litter mixing in plateau wetlands

Long‐term responses of leaf litter decomposition to temperature, litter quality and litter mixing in plateau wetlands

Habitat use, preference, and utilization distribution of two crane species (Genus: Grus) in Huize National Nature Reserve, Yunnan–Guizhou Plateau, China

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

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