Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia
Measurements of photosynthesis (A) and stomatal conductance (gs) were conducted using the leaves of four tropical tree species (Dipterocarpus sublamellatus, Neobalanocarpus heimii, Ptychopyxis caput-medusae, and Xanthophyllum amoneum) in the canopy of the lowland forest at the Pasoh Forest Reserve i...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Tropical Ecology
2001
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| Online Access: | http://psasir.upm.edu.my/id/eprint/48660/ http://psasir.upm.edu.my/id/eprint/48660/1/Photosynthetic%20rates%20of%20four%20tree%20species%20in%20the%20upper%20canopy%20of%20a%20tropical%20rain%20forest%20at%20the%20Pasoh%20Forest%20Reserve%20in%20Peninsular%20Malaysia.pdf |
| _version_ | 1848851149480787968 |
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| author | Furukawa, Akio Toma, Takeshi Maruyama, Yutaka Matsumoto, Yosuke Uemura, Akira Abdullah, Ahmad Makmom Awang, Muhamad |
| author_facet | Furukawa, Akio Toma, Takeshi Maruyama, Yutaka Matsumoto, Yosuke Uemura, Akira Abdullah, Ahmad Makmom Awang, Muhamad |
| author_sort | Furukawa, Akio |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Measurements of photosynthesis (A) and stomatal conductance (gs) were conducted using the leaves of four tropical tree species (Dipterocarpus sublamellatus, Neobalanocarpus heimii, Ptychopyxis caput-medusae, and Xanthophyllum amoneum) in the canopy of the lowland forest at the Pasoh Forest Reserve in peninsular Malaysia. A canopy walkway was used to reach the canopy of 30- to 40-m-tall trees and diurnal changes in A and gs were determined. The diurnal patterns for A differed between days and between species, though A of the four species were similar but quite low. In general, A increased with increasing photosynthetically active radiation (PAR) before noon, then declined. As well, a linear relationship was detected between gs and A, but no statistically significant correlation could be confirmed between these two factors for D. sublamellatus and P. caput-medusae in November and July. The value of gs decreased with increasing vapor pressure deficit for D. sublamellatus, but the other species did not show this response. |
| first_indexed | 2025-11-15T10:17:36Z |
| format | Article |
| id | upm-48660 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:17:36Z |
| publishDate | 2001 |
| publisher | The Japan Society of Tropical Ecology |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-486602016-10-10T05:38:14Z http://psasir.upm.edu.my/id/eprint/48660/ Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia Furukawa, Akio Toma, Takeshi Maruyama, Yutaka Matsumoto, Yosuke Uemura, Akira Abdullah, Ahmad Makmom Awang, Muhamad Measurements of photosynthesis (A) and stomatal conductance (gs) were conducted using the leaves of four tropical tree species (Dipterocarpus sublamellatus, Neobalanocarpus heimii, Ptychopyxis caput-medusae, and Xanthophyllum amoneum) in the canopy of the lowland forest at the Pasoh Forest Reserve in peninsular Malaysia. A canopy walkway was used to reach the canopy of 30- to 40-m-tall trees and diurnal changes in A and gs were determined. The diurnal patterns for A differed between days and between species, though A of the four species were similar but quite low. In general, A increased with increasing photosynthetically active radiation (PAR) before noon, then declined. As well, a linear relationship was detected between gs and A, but no statistically significant correlation could be confirmed between these two factors for D. sublamellatus and P. caput-medusae in November and July. The value of gs decreased with increasing vapor pressure deficit for D. sublamellatus, but the other species did not show this response. The Japan Society of Tropical Ecology 2001 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/48660/1/Photosynthetic%20rates%20of%20four%20tree%20species%20in%20the%20upper%20canopy%20of%20a%20tropical%20rain%20forest%20at%20the%20Pasoh%20Forest%20Reserve%20in%20Peninsular%20Malaysia.pdf Furukawa, Akio and Toma, Takeshi and Maruyama, Yutaka and Matsumoto, Yosuke and Uemura, Akira and Abdullah, Ahmad Makmom and Awang, Muhamad (2001) Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia. Tropics, 10 (4). pp. 519-527. ISSN 0917-415X; ESSN: 1882-5729 https://www.jstage.jst.go.jp/article/tropics/10/4/10_4_519/_article 10.3759/tropics.10.519 |
| spellingShingle | Furukawa, Akio Toma, Takeshi Maruyama, Yutaka Matsumoto, Yosuke Uemura, Akira Abdullah, Ahmad Makmom Awang, Muhamad Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia |
| title | Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia |
| title_full | Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia |
| title_fullStr | Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia |
| title_full_unstemmed | Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia |
| title_short | Photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the Pasoh Forest Reserve in Peninsular Malaysia |
| title_sort | photosynthetic rates of four tree species in the upper canopy of a tropical rain forest at the pasoh forest reserve in peninsular malaysia |
| url | http://psasir.upm.edu.my/id/eprint/48660/ http://psasir.upm.edu.my/id/eprint/48660/ http://psasir.upm.edu.my/id/eprint/48660/ http://psasir.upm.edu.my/id/eprint/48660/1/Photosynthetic%20rates%20of%20four%20tree%20species%20in%20the%20upper%20canopy%20of%20a%20tropical%20rain%20forest%20at%20the%20Pasoh%20Forest%20Reserve%20in%20Peninsular%20Malaysia.pdf |