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A Multi-Scale Approach to Investigating the Red-Crowned Crane-Habitat Relationship in the Yellow River Delta Nature Reserve, China: Implications for Conservation.

Cao M, Xu H, Le Z, Zhu M, Cao Y - PLoS ONE (2015)

Bottom Line: Landscape factors had the largest total (45.13%) and independent effects (17.42%) at the second level.The hierarchical partitioning results showed that the percentage of seepweed tidal flats were the main limiting factor at the landscape scale.Our study indicates that landscape and plot factors make a relatively large contribution to crane occupancy and that the focus of conservation effects should be directed toward landscape- and plot-level factors by enhancing the protection of seepweed tidal flats, tamarisk-seepweed tidal flats, reed marshes and other natural wetlands.

View Article: PubMed Central - PubMed

Affiliation: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing City, Jiangsu Province, China.

ABSTRACT
The red-crowned crane (Grus japonensis (Statius Müller, 1776)) is a rare and endangered species that lives in wetlands. In this study, we used variance partitioning and hierarchical partitioning methods to explore the red-crowned crane-habitat relationship at multiple scales in the Yellow River Delta Nature Reserve (YRDNR). In addition, we used habitat modeling to identify the cranes' habitat distribution pattern and protection gaps in the YRDNR. The variance partitioning results showed that habitat variables accounted for a substantially larger total and pure variation in crane occupancy than the variation accounted for by spatial variables at the first level. Landscape factors had the largest total (45.13%) and independent effects (17.42%) at the second level. The hierarchical partitioning results showed that the percentage of seepweed tidal flats were the main limiting factor at the landscape scale. Vegetation coverage contributed the greatest independent explanatory power at the plot scale, and patch area was the predominant factor at the patch scale. Our habitat modeling results showed that crane suitable habitat covered more than 26% of the reserve area and that there remained a large protection gap with an area of 20,455 ha, which accounted for 69.51% of the total suitable habitat of cranes. Our study indicates that landscape and plot factors make a relatively large contribution to crane occupancy and that the focus of conservation effects should be directed toward landscape- and plot-level factors by enhancing the protection of seepweed tidal flats, tamarisk-seepweed tidal flats, reed marshes and other natural wetlands. We propose that efforts should be made to strengthen wetland restoration, adjust functional zoning maps, and improve the management of human disturbance in the YRDNR.

No MeSH data available.


Related in: MedlinePlus

Location of the Yellow River Delta Nature Reserve in China.'Absence' and 'presence' indicate the absence and presence sampling points of red-crowned cranes. Blue: Yellow River in the YRDNR. Light gray: experimental zones of the YRDNR. Light green: buffer zones of the YRDNR. Dark green: core zones of the YRDNR.
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pone.0129833.g001: Location of the Yellow River Delta Nature Reserve in China.'Absence' and 'presence' indicate the absence and presence sampling points of red-crowned cranes. Blue: Yellow River in the YRDNR. Light gray: experimental zones of the YRDNR. Light green: buffer zones of the YRDNR. Dark green: core zones of the YRDNR.

Mentions: The YRDNR covers an area of 153,000 ha and is located in the Yellow River estuary in northeastern Shandong Province, China (37°35′–38°12′N, 118°33′–119°20′E) (Fig 1). The YRDNR is a national nature reserve that was established in 1992 to protect the new wetlands at the mouth of the Yellow River and rare and endangered birds. The abundance of tidal flats and marshes, wetland vegetation and aquatic organisms within the YRDNR provides a highly suitable habitat for waterbird survival, reproduction and migration. Furthermore, the YRDNR is a site in the East Asia bird migration network and the East Asia-Australia wading-bird network [28]. However, the Shengli oil field, which is the second largest oil field in China, is also located in the YRDNR and poses a threat to the waterbird habitat.


A Multi-Scale Approach to Investigating the Red-Crowned Crane-Habitat Relationship in the Yellow River Delta Nature Reserve, China: Implications for Conservation.

Cao M, Xu H, Le Z, Zhu M, Cao Y - PLoS ONE (2015)

Location of the Yellow River Delta Nature Reserve in China.'Absence' and 'presence' indicate the absence and presence sampling points of red-crowned cranes. Blue: Yellow River in the YRDNR. Light gray: experimental zones of the YRDNR. Light green: buffer zones of the YRDNR. Dark green: core zones of the YRDNR.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4465972&req=5

pone.0129833.g001: Location of the Yellow River Delta Nature Reserve in China.'Absence' and 'presence' indicate the absence and presence sampling points of red-crowned cranes. Blue: Yellow River in the YRDNR. Light gray: experimental zones of the YRDNR. Light green: buffer zones of the YRDNR. Dark green: core zones of the YRDNR.
Mentions: The YRDNR covers an area of 153,000 ha and is located in the Yellow River estuary in northeastern Shandong Province, China (37°35′–38°12′N, 118°33′–119°20′E) (Fig 1). The YRDNR is a national nature reserve that was established in 1992 to protect the new wetlands at the mouth of the Yellow River and rare and endangered birds. The abundance of tidal flats and marshes, wetland vegetation and aquatic organisms within the YRDNR provides a highly suitable habitat for waterbird survival, reproduction and migration. Furthermore, the YRDNR is a site in the East Asia bird migration network and the East Asia-Australia wading-bird network [28]. However, the Shengli oil field, which is the second largest oil field in China, is also located in the YRDNR and poses a threat to the waterbird habitat.

Bottom Line: Landscape factors had the largest total (45.13%) and independent effects (17.42%) at the second level.The hierarchical partitioning results showed that the percentage of seepweed tidal flats were the main limiting factor at the landscape scale.Our study indicates that landscape and plot factors make a relatively large contribution to crane occupancy and that the focus of conservation effects should be directed toward landscape- and plot-level factors by enhancing the protection of seepweed tidal flats, tamarisk-seepweed tidal flats, reed marshes and other natural wetlands.

View Article: PubMed Central - PubMed

Affiliation: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing City, Jiangsu Province, China.

ABSTRACT
The red-crowned crane (Grus japonensis (Statius Müller, 1776)) is a rare and endangered species that lives in wetlands. In this study, we used variance partitioning and hierarchical partitioning methods to explore the red-crowned crane-habitat relationship at multiple scales in the Yellow River Delta Nature Reserve (YRDNR). In addition, we used habitat modeling to identify the cranes' habitat distribution pattern and protection gaps in the YRDNR. The variance partitioning results showed that habitat variables accounted for a substantially larger total and pure variation in crane occupancy than the variation accounted for by spatial variables at the first level. Landscape factors had the largest total (45.13%) and independent effects (17.42%) at the second level. The hierarchical partitioning results showed that the percentage of seepweed tidal flats were the main limiting factor at the landscape scale. Vegetation coverage contributed the greatest independent explanatory power at the plot scale, and patch area was the predominant factor at the patch scale. Our habitat modeling results showed that crane suitable habitat covered more than 26% of the reserve area and that there remained a large protection gap with an area of 20,455 ha, which accounted for 69.51% of the total suitable habitat of cranes. Our study indicates that landscape and plot factors make a relatively large contribution to crane occupancy and that the focus of conservation effects should be directed toward landscape- and plot-level factors by enhancing the protection of seepweed tidal flats, tamarisk-seepweed tidal flats, reed marshes and other natural wetlands. We propose that efforts should be made to strengthen wetland restoration, adjust functional zoning maps, and improve the management of human disturbance in the YRDNR.

No MeSH data available.


Related in: MedlinePlus