Earticle

초록

영어

Sabah has experienced a rapid decline in the extent of forest cover. The precise impact of habitat loss on the conservation status of the plants of Sabah is uncertain. In this study we use the niche modelling algorithm MAXENT to construct preliminary, revised and final ecological niche models for Dipterocarpus lamellatus and Dipterocarpus ochraceus and combined these models with data on current land-use to derive conservation assessments for each species. Preliminary models were based on herbarium data alone. Ground surveys were conducted to evaluate the performance of these preliminary models, and a revised niche model was generated from the combined herbarium and ground survey data. The final model was obtained by constraining the predictions of the revised models by filters. The range overlap between the preliminary and revised models was 0.47 for D. lamellatus and 0.39 for D. ochraceus, suggesting poor agreement between them. There was substantial variation in estimates of habitat loss for D. ochraceus, among the preliminary, revised and constrained models, and this has the potential to lead to incorrect threat assessments. From these estimates of habitat loss, the historic distribution and estimates of population size we determine that both species should be classified as Critically Endangered under IUCN Red List guidelines. Our results suggest that ground-truthing of ecological niche models is essential, especially if the models are being used for conservation decision making.

목차

Abstract
 Introduction
 Materials and Methods
  Study species
  Development of ecological niche models
  Field surveys
  Seedling recruitment during a general flowering event
  Conservation assessments
 Results
  Ground-truthing and comparison of models
  Conservation assessments
 Discussion
  Ground truthing niche models
  Conservation status of Dipterocarpus lamellatus and Dipterocarpus ochraceus in Sabah
 Conclusions
 Acknowledgements
 References
 Appendix

키워드

저자

• Colin R. Maycock [ Forest Research Centre, Sabah Forest Department, Sanadkan, 90714, Malaysia, Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, UK ] Corresponding Author
• Eyen Khoo [ Forest Research Centre, Sabah Forest Department, Sanadkan, 90714, Malaysia ]
• Chris J. Kettle [ Institute of Terrestrial Ecosystems, ETH Zürich, CHN G 73.1, Universitätstrasse 16, Zürich, 8092, Switzerland ]
• Joan T. Pereira [ Forest Research Centre, Sabah Forest Department, Sanadkan, 90714, Malaysia ]
• John B. Sugau [ Forest Research Centre, Sabah Forest Department, Sanadkan, 90714, Malaysia ]
• Reuben Nilus [ Forest Research Centre, Sabah Forest Department, Sanadkan, 90714, Malaysia ]
• Jeisin Jumian [ Forest Research Centre, Sabah Forest Department, Sanadkan, 90714, Malaysia ]
• David F. R. P. Burslem [ Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen, AB24 3UU, UK ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Journal of Forest and Environmental Science [산림과학연구]

• 간기

  계간

• pISSN

  2288-9744

• eISSN

  2288-9752

• 수록기간

  1981~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 526 DDC 634