Cargando…
Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia
Small ape habitat throughout Malaysia is rapidly being lost, degraded, and fragmented, and the effects of these changes on the abundance on this taxon are currently unknown. This study assessed the group density of Hylobates agilis in virgin forest, previously logged forest (1960s–1990s), and recent...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9541461/ https://www.ncbi.nlm.nih.gov/pubmed/35521672 http://dx.doi.org/10.1002/ajp.23388 |
_version_ | 1784803929664520192 |
---|---|
author | Pang, Yi Heng Lappan, Susan Bartlett, Thad Q. Mohd Sah, Shahrul Anuar N. Rosely, Nik Fadzly Ruppert, Nadine |
author_facet | Pang, Yi Heng Lappan, Susan Bartlett, Thad Q. Mohd Sah, Shahrul Anuar N. Rosely, Nik Fadzly Ruppert, Nadine |
author_sort | Pang, Yi Heng |
collection | PubMed |
description | Small ape habitat throughout Malaysia is rapidly being lost, degraded, and fragmented, and the effects of these changes on the abundance on this taxon are currently unknown. This study assessed the group density of Hylobates agilis in virgin forest, previously logged forest (1960s–1990s), and recently logged forest (2015–2017) of the Ulu Muda Forest Reserve (UMFR), Kedah, Malaysia. We conducted fixed‐point active acoustic triangulation at nine survey areas to estimate group density. We used vegetation “speed plots” and satellite imagery to quantify habitat characteristics and used model selection to identify ecological predictors of group density variation. The estimated group density of H. agilis in UMFR was 4.03 ± 0.14 groups km(−2), with an estimated total of 2927 ± 102 groups in areas below 450 m a.s.l. in UMFR. Group density did not differ significantly among habitat types. The best ecological predictors for group density were canopy cover and proportion of deforested area. Areas with recent deforestation were associated with relatively high group densities, suggesting compression of the populations persisting in these habitat types. The consistently high group densities detected in all forest types emphasizes the importance of degraded forest as habitat for H. agilis. Because of the threats to small apes in Malaysia, and the uncertain status of most populations, we recommend a nationwide population census and regular monitoring to inform conservation planning and implementation. Most urgently, we call for immediate and permanent protection of UMFR and other forests in the Greater Ulu Muda landscape to protect the globally significant populations of H. agilis, as well as other charismatic and threatened megafauna, birds, and flora in the area. |
format | Online Article Text |
id | pubmed-9541461 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-95414612022-10-14 Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia Pang, Yi Heng Lappan, Susan Bartlett, Thad Q. Mohd Sah, Shahrul Anuar N. Rosely, Nik Fadzly Ruppert, Nadine Am J Primatol Research Articles Small ape habitat throughout Malaysia is rapidly being lost, degraded, and fragmented, and the effects of these changes on the abundance on this taxon are currently unknown. This study assessed the group density of Hylobates agilis in virgin forest, previously logged forest (1960s–1990s), and recently logged forest (2015–2017) of the Ulu Muda Forest Reserve (UMFR), Kedah, Malaysia. We conducted fixed‐point active acoustic triangulation at nine survey areas to estimate group density. We used vegetation “speed plots” and satellite imagery to quantify habitat characteristics and used model selection to identify ecological predictors of group density variation. The estimated group density of H. agilis in UMFR was 4.03 ± 0.14 groups km(−2), with an estimated total of 2927 ± 102 groups in areas below 450 m a.s.l. in UMFR. Group density did not differ significantly among habitat types. The best ecological predictors for group density were canopy cover and proportion of deforested area. Areas with recent deforestation were associated with relatively high group densities, suggesting compression of the populations persisting in these habitat types. The consistently high group densities detected in all forest types emphasizes the importance of degraded forest as habitat for H. agilis. Because of the threats to small apes in Malaysia, and the uncertain status of most populations, we recommend a nationwide population census and regular monitoring to inform conservation planning and implementation. Most urgently, we call for immediate and permanent protection of UMFR and other forests in the Greater Ulu Muda landscape to protect the globally significant populations of H. agilis, as well as other charismatic and threatened megafauna, birds, and flora in the area. John Wiley and Sons Inc. 2022-05-06 2022-07 /pmc/articles/PMC9541461/ /pubmed/35521672 http://dx.doi.org/10.1002/ajp.23388 Text en © 2022 The Authors. American Journal of Primatology published by Wiley Periodicals LLC. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Articles Pang, Yi Heng Lappan, Susan Bartlett, Thad Q. Mohd Sah, Shahrul Anuar N. Rosely, Nik Fadzly Ruppert, Nadine Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia |
title | Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia |
title_full | Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia |
title_fullStr | Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia |
title_full_unstemmed | Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia |
title_short | Population densities of Hylobates agilis in forests with different disturbance histories in Ulu Muda Forest Reserve, Malaysia |
title_sort | population densities of hylobates agilis in forests with different disturbance histories in ulu muda forest reserve, malaysia |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9541461/ https://www.ncbi.nlm.nih.gov/pubmed/35521672 http://dx.doi.org/10.1002/ajp.23388 |
work_keys_str_mv | AT pangyiheng populationdensitiesofhylobatesagilisinforestswithdifferentdisturbancehistoriesinulumudaforestreservemalaysia AT lappansusan populationdensitiesofhylobatesagilisinforestswithdifferentdisturbancehistoriesinulumudaforestreservemalaysia AT bartlettthadq populationdensitiesofhylobatesagilisinforestswithdifferentdisturbancehistoriesinulumudaforestreservemalaysia AT mohdsahshahrulanuar populationdensitiesofhylobatesagilisinforestswithdifferentdisturbancehistoriesinulumudaforestreservemalaysia AT nroselynikfadzly populationdensitiesofhylobatesagilisinforestswithdifferentdisturbancehistoriesinulumudaforestreservemalaysia AT ruppertnadine populationdensitiesofhylobatesagilisinforestswithdifferentdisturbancehistoriesinulumudaforestreservemalaysia |