Skip to main content
×
Home
    • Aa
    • Aa

Declining breeding populations of White-naped Cranes in Eastern Mongolia, a ten-year update

  • MARTIN GILBERT (a1), BAYARBAATAR BUUVEIBAATAR (a2), AMANDA E. FINE (a1), LOSOLMAA JAMBAL (a2) and SAMANTHA STRINDBERG (a1)...
Abstract
Summary

Eastern Mongolia supports one of the most important breeding populations of the White-naped Crane Antigone vipio (WNC), which is classified as ‘Vulnerable’ by the IUCN. Large numbers of WNCs were found to be breeding at high densities within the Ulz River basin during surveys conducted in 2000 and 2001, along a 270 km section of the river. Following these surveys, an extended drought continuing for at least a decade has threatened wetland ecosystems throughout Eastern Mongolia. This study reports the findings of surveys conducted in 2010 and 2011 along the same section of the Ulz River surveyed a decade earlier, as well as a generalised survey of other sites where breeding WNCs had previously been recorded. Along the Ulz River, populations declined from 42 territorial pairs in 2001 to 17 in 2011. Estimates of detection probability using distance sampling and occupancy methods at two locations gave consistent results of 23%–27% detectability. With a minimum population of 234 WNCs observed across all sites in 2011, these detection probabilities suggest that the areas surveyed support the majority of breeding WNCs in the western population. Although we cannot exclude the movement of WNCs beyond the survey area, these findings also suggest that the population has declined between 2001 and 2011. Exploration of key habitat variables using occupancy models and generalized linear mixed models found that WNCs favoured areas of high wet vegetation (estimated as ‘wet meadow’ coverage and using normalized difference vegetation index), and low grazing pressure. Given the importance of water resources to WNCs and nomadic herding communities, use of wetland habitat must be carefully managed to balance the needs of cranes and people, particularly during periods of drought.

Copyright
Corresponding author
*Author for correspondence; e-mail: mgilbert@wcs.org
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

U. Bradter , S. Gombobaatar , C. Uuganbayar , T. E. Grazia and K. M Exo . (2005) Reproductive performance and nest-site selection of White-naped Cranes Grus vipio in the Ulz river valley, north-eastern Mongolia. Bird Conserv. Internatn. 15: 313326.

U. Bradter , S. Gombobaatar , C. Uuganbayar , T. E. Grazia and K. M Exo . (2007) Time budgets and habitat use of White-naped Cranes Grus vipio in the Ulz river valley, north-eastern Mongolia during the breeding season. Bird Conserv. Internatn. 17: 259271.

J. Harris and C Mirande . (2013) A global overview of cranes: status, threats and conservation priorities. Chinese Birds 4: 189209.

H. Higuchi , J. P. Pierre , V. Krever , V. Andronov G. Fujita et al. (2004) Using a remote technology in conservation: Satellite tracking White-naped Cranes in Russia and Asia. Conserv. Biol. 18: 136147.

F. Li , J. Wu , J. Harris and J Burnham . (2012) Number and distribution of cranes wintering at Poyang Lake, China during 2011–2012. Chinese Birds 3: 180190. Accessed from http://www.chinesebirds.net/EN/abstract/abstract218.shtml. Accessed on: 13 April 2014.

D. Mackenzie and L Bailey . (2004) Assessing the fit of site-occupancy models. J. Agric. Biol. Envir. S. 9: 300318.

D. Mackenzie , J. D. Nichols , G. Lachman , S. Droege J. Royle and C Langtimm . (2002) Estimating site occupancy when detection probabilities are less than one. Ecology 83: 22482255.

J. Pearce and S Ferrier . (2000) Evaluating the predictive performance of habitat models developed using logistic regression. Ecol. Modell. 133: 225245.

L. Thomas , S. Buckland , E. Rexstad , J. Laake , S. Strindberg , et al. (2010) Distance software: design and analysis of distance sampling surveys for estimating population size. J. Appl. Ecol. 47: 514.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Bird Conservation International
  • ISSN: 0959-2709
  • EISSN: 1474-0001
  • URL: /core/journals/bird-conservation-international
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×
Type Description Title
WORD
Supplementary Materials

Gilbert supplementary material
Table S1

 Word (31 KB)
31 KB

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 5
Total number of PDF views: 24 *
Loading metrics...

Abstract views

Total abstract views: 300 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 29th March 2017. This data will be updated every 24 hours.