ASSESSMENT OF SEEDLING ABUNDANCE, SURVIVAL AND GROWTH OF TWO DIPTEROCARP SPECIES IN PEAT SWAMP FORESTS OF BRUNEI DARUSSALAM
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Dryobalanops rappa Becc. and Shorea albida Sym. are Bornean endemics of high conservation value and increasingly threatened by anthropogenic disturbances. In-situ study of seedling abundance and growth performance of these Dipterocarp species was conducted in two selected peat swamp forests of Brunei Darussalam, following a mast fruiting event in March–May 2014. Within six 6 × 6 m plots at each forest site, D. rappa seedlings at the Anduki peat swamp forest and S. albida seedlings at the Badas peat swamp forest were measured for abundance at the initial census in September 2014, as well as survival and relative growth rates (RGR) after a period of 5 months, with the final census in February 2015. We found significantly higher seedling abundance for D. rappa (1885 ± 208) than S. albida (160 ± 71). Significantly higher percentage survival was recorded for D. rappa seedlings (90.8 ± 2.2%) in comparison to S. albida seedlings (81.7 ± 2.2%). S. albida seedlings (0.24 ± 0.02 mm mm⁻¹ month⁻¹) showed significantly greater RGR in stem diameter than D. rappa seedlings (0.18 ± 0.02 mm mm⁻¹ month⁻¹), however, there were no significant differences in the RGRs based on seedling height, leaf number and biomass between D. rappa and S. albida seedlings. In terms of seedling abundance and percentage survival, D. rappa seedlings appeared to be more successful in regeneration and may potentially be used for rehabilitation of degraded tropical peat swamps and other forest types. Our results suggested that greater conservation efforts of peat swamps must be made to protect the Bornean endemic plant species, in particular S. albida.
Anderson JAR. 1963. The flora of the peat swamp forests of Sarawak and Brunei, including a catalogue of all recorded species of flowering plants, ferns and fern allies. Singapore (SG): Gard. Bull. Singapore. p. 131–228.
Anderson JAR. 1964. The structure and development of peat swamps of Sarawak and Brunei. J Trop Geo 18:7–16.
Appanah S, Turnbull JW. 1998. A review of Dipterocarps: Taxonomy, ecology and silviculture. Bogor (ID): CIFOR.
Ashton P [Internet]. 1998. The IUCN Red List of Threatened Species 1998: Shorea albida. e.T33099A9751699; [cited 2016 Dec 8]. Available from: http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T33099A9751699.en
Ashton PS, Kamariah AS, Said IM. 2003. Field guide to the forest trees of Brunei Darussalam and the Northwest Borneo hotspot. Bandar Seri Begawan (BN): University of Brunei Darussalam in association with Brunei Forestry Department, Brunei Shell Petroleum and Sultan Haji Hassanal Bolkiah Foundation.
Backlund S. 2013. The effects of mother trees and site conditions on the distribution of natural regeneration establishment in a Bornean rainforest disturbed by logging and fire [Thesis]. Retrieved from Swedish University of Agricultural Sciences.
Curran LM, Webb CO. 2000. Experimental tests of the spatiotemporal scale of seed predation in mast fruiting Dipterocarpaceae. Ecol Monogr 70(1):129–48.
Daisuke H, Tanaka K, Jawa KJ, Ikuo N, Katsutoshi S. 2013. Rehabilitation of degraded tropical rainforest using dipterocarp trees in Sarawak, Malaysia. Int J Forestry Res: 683017. doi: 10.1155/2013/683017
Delissio LJ, Primack RB, Hall P, Lee HS. 2002. A decade of canopy-tree seedling survival and growth in two Bornean rain forests: Persistence and recovery from suppression. J Trop Ecol 18(5):645–58.
Dixon C, Fyson GF, Pasiecznik N, Praciak A, Rushforth K, Sassen M, ... van Heist M. 2013. The CABI encyclopedia of forest trees. Oxfordshire (UK): CABI Publishing.
Forestry Department. 2014. The 5th national report to the Convention on Biological Diversity. Bandar Seri Begawan (BN): The Forestry Department, Ministry of Industry and Primary Resources.
Forestry Department [Internet]. 2016. Forest Types: Peat Swamp. Bandar Seri Begawan, BN: Forestry Department; [cited 2016 Dec 9]. Available from: http://www.forestry.gov.bn/
Gavin DG, Peart DR. 1997. Spatial structure and regeneration of Tetramerista glabra in peat swamp rainforest in Indonesian Borneo. Plant Ecol 131(2):223–31.
Ghazoul J, Sheil D. 2010. Tropical rain forest ecology, diversity and conservation. Oxford (UK): Oxford University Press.
Hunt R. 1982. Plant growth curves: The functional approach to plant growth analysis. London (UK): Edward Arnold Ltd.
Ibrahim S. 1996. Gonystylus bancanus: Some observations on its flowering, fruiting, seed predation and germination. J Trop Forest Sci 8(3):424–6.
Itoh A, Yakamura T, Ogino K, Lee HS, Ashton PS. 1997. Spatial distribution patterns of two predominant emergent trees in a tropical rainforest in Sarawak, Malaysia. Plant Ecol 132(2):121–36.
Jans WWP, Dibor L, Verwer C, Kruijt B, Tan S, van der Meer PJ. 2012. Effects of light soil flooding on the growth and photosynthesis of Gonostylus bancanus seedlings in Malaysia. J Trop For Sci 24(1):54–63.
Kitajima K. 1994. Relative importance of photosynthetic traits and allocation patterns as correlates of seedling shade tolerance of 13 tropical trees. Oecologia 98(3–4):419–28.
Kobayashi S. 1998. Forest structure and regeneration process of peat swamp Alan forests (Shorea albida) in Brunei Darussalam. In: Suhartoyo H, Fatawi M, editors. Proceedings of the Second International Symposium on Asian Tropical Forest Management. p. 166–87.
Nakagawa M, Takeuchi Y, Kenta T, Nakashizuka T. 2005. Predispersal seed predation by insects vs. vertebrates in six Dipterocarp species in Sarawak, Malaysia. Biotropica 37(3):389–96.
Ng TP, Ibrahim S. 2001. Common trees in peat swamp forests of Peninsular Malaysia. Kepong (MY): Forest Research Institute.
Pg Harun AMK [Internet]. 2015. Construction projects damage Belait peatlands. Bandar Seri Begawan, BN: The Brunei Times; [cited 2015 Oct 28]. Available from: http://bt.com.bn/
Phillips VD. 1998. Peat swamp ecology and sustainable development in Borneo. Biodivers Conserv 7(5):651–71.
Posa MRC, Wijedasa LS, Corlett RT. 2011. Biodiversity and conservation of tropical peat swamp forests. BioScience 61(1):49–57.
R Core Team [Internet]. 2014. R: A language and environment for statistical computing. Vienna, AT: R Foundation for Statistical Computing; [cited 2016 Dec 1]. Available from: https://www.R-project.org/
Saito H, Shibuya M, Tuah SJ, Turjaman M, Takahashi K, Jamal Y, ... Limin SH. 2005. Initial screening of fast-growing tree species tolerant of dry tropical peatlands in Central Kalimantan, Indonesia. J Forestry Res 2(2):1–10.
Scholes JD, Press MC, Zipperlen SW. 1996. Differences in light energy utilisation and dissipation between dipterocarp rainforest tree seedlings. Oecologia 109(1):41–8.
Shimamura T, Momose K, Kobayashi S. 2006. A comparison of sites suitable for the seedling establishment of two co-occurring species, Swintonia glauca and Stemonurus scorpioides, in a tropical peat swamp forest. Ecol Res 21(5):759–67.
Sukri RSH. 2010. Differentiation of dipterocarp floristic composition and species distributions in Brunei Darussalam [Dissertation]. Retrieved from University of Aberdeen.
Takeuchi Y, Nakashizuka T. 2007. Effect of distance and density on seed/seedling fate of two dipterocarp species. Forest Ecol Manag 247(1):167–74.
Turner IM. 1990. The seedling survivorship and growth of three Shorea species in a Malaysian tropical rain forest. J Trop Ecol 6(4):469–78.
Webb CO, Peart DR. 1999. Seedling density dependence promotes coexistence of Bornean rain forest trees. Ecology 80(6):2006–17.
Whitmore TC, Brown ND. 1996. Dipterocarp seedling growth in rainforest canopy gaps during six and a half years. Philos T R Soc 351(1344):1195–203.
Wong A [Internet]. 2016. Forest fires serious threat to large tree native to Borneo. Bandar Seri Begawan, BN: The Brunei Times; [cited 2016 Apr 11]. Available from: http://bt.com.bn/
Wong KM, Kamariah AS. 1999. Forests and trees of Brunei Darussalam. Bandar Seri Begawan (BN): Universiti Brunei Darussalam, Forestry Dept., Ministry of Industry and Primary Resources & Brunei Shell Petroleum Co. Sdn. Bhd.
Wong KM, Ahmad JA, Low YW, Kalat MAA. 2015. Rainforest plants and flowers of Brunei Darussalam. Bandar Seri Begawan (BN): Forestry Department, Ministry of Industry and Primary Resources.
Wooster MJ, Perry GLW, Zoumas A. 2012. Fire, drought and El Niño relationships on Borneo (Southeast Asia) in the pre-MODIS era (1980–2000). Biogeosciences 9(1):317–40.
Yamada I. 1997. Tropical rainforests of Southeast Asia. Honolulu (US): University of Hawaii Press.
Yamada T, Suzuki E. 2004. Ecological role of vegetative sprouting in the regeneration of Dryobalanops rappa, an emergent species in a Bornean tropical wetland forest. J Trop Ecol 20(4):377–84.
Yule CM. 2010. Loss of biodiversity and ecosystem functioning in Indo-Malayan peat swamp forests. Biodivers Conserv 19(2):393–409.
Yussof M [Internet]. 2015. HoB initiative to battle global warming. Borneo Bulletin; [cited 2015 Oct 3]. Available from: http://borneobulletin.com.bn/
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