Environmental predictors of forest structure, tree growth and wood production for Xylocarpus granatum in mixed-species mangrove forests

Alistar I. Robertson; Irena Zagorskis; Murray Logan; Paul Dixon; Paul Daniel

doi:10.1071/MF23246

RESEARCH ARTICLE (Open Access)

Next Contents Vol 75(9)

Environmental predictors of forest structure, tree growth and wood production for Xylocarpus granatum in mixed-species mangrove forests

Alistar I. Robertson

^A ^B ^* , Irena Zagorskis ^A , Murray Logan ^A , Paul Dixon ^A and Paul Daniel ^A

+ Author Affiliations

- Author Affiliations

^A Australian Institute of Marine Science, PMB 3, Townsville MC, Qld 4810, Australia.

^B UWA Oceans Institute and School of Biological Science, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.

^* Correspondence to: alistar.robertson@uwa.edu.au

Handling Editor: Melanie Bishop

Marine and Freshwater Research 75, MF23246 https://doi.org/10.1071/MF23246

Submitted: 14 December 2023 Accepted: 17 April 2024 Published: 31 May 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Context

Restored mangrove forests are threatened by the restricted range of species used. Xylocarpus granatum has excellent timber and could add value in mangrove plantings.

Methods

Forest structure and environmental variables were measured at 40 sites in northern Australia and Papua New Guinea. Tree growth was measured at 18 sites. Boosted regression tree modelling identified environmental predictor variables for above-ground biomass for X. granatum (AGB_X), mean annual increment in diameter at breast height (DBH) for X. granatum (MAI_X) and wood production (P_W).

Aims

To determine the environmental conditions under which X. granatum has the greatest biomass and growth.

Key results

Increasing stem density, basal area and AGB of other tree species were most important in limiting AGB_X. MAI_X (range 0.03–0.55 cm year⁻¹) was greatest when sediment redox potential was >100 mV and mean annual catchment rainfall was >4000 mm. MAI_X increased with an increasing mean minimum air temperature and sediment percentage silt and percentage phosphorus. P_W declined with the stem density of all species and increased with an increasing percentage silt and when sediment redox potential was >180 mV.

Conclusions and implications

Under optimal conditions, X. granatum grows as fast as most mangrove species and could make an excellent, harvestable addition to the species mix used in restoration projects.

Keywords: aboveground biomass, boosted regression trees, environmental predictor variables, growth, mangrove, tree height, wood production, Xylocarpus granatum.

References

Aertsen W, Kint V, De Vos B, Deckers J, Van Orshoven J, Muys B (2012) Predicting forest site productivity in temperate lowland from forest floor, soil and litterfall characteristics using boosted regression trees. Plant and Soil 354, 157-172.
| Crossref | Google Scholar |

Aksornkoae S (1993) ‘Ecology and management of mangroves.’ (International Union of Conservation of Nature: Bangkok, Thailand)

Allen JA, Krauss KW, Hauff RD (2003) Factors limiting the intertidal distribution of the mangrove species Xylocarpus granatum. Oecologia 135, 110-121.
| Crossref | Google Scholar | PubMed |

Alongi DM (2009) ‘The energetics of mangrove forests.’ (Springer Science)

Alongi DM, Christoffersen P, Tirendi F, Robertson AI (1992) The influence of freshwater and material export on sedimentary facies and benthic processes within the Fly Delta and adjacent Gulf of Papua (Papua New Guinea). Continental Shelf Research 12, 287-326.
| Crossref | Google Scholar |

Analuddin K, Suwa R, Hagihara A (2009) The self-thinning process in mangrove Kandelia obovata stands. Journal of Plant Research 122, 53-59.
| Crossref | Google Scholar | PubMed |

Anderson-Teixeira KJ, McGarvey JC, Muller-Landau HC, Park JY, Gonzalez-Akre EB, Herrmann V, Bennett AC, So CV, Bourg NA, Thompson JR, McMahon SM, McShea WJ (2015) Size-related scaling of tree form and function in a mixed-age forest. Functional Ecology 29, 1587-1602.
| Crossref | Google Scholar |

Ashton EC, Macintosh DJ (2002) Preliminary assessment of the plant diversity and community ecology of the Samatan mangrove forest, Sarawak, Malaysia. Forest Ecology and Management 166, 111-129.
| Crossref | Google Scholar |

Ball MC (1988) Ecophysiology of mangroves. Trees 2, 129-142.
| Crossref | Google Scholar |

Ball MC (1998) Mangrove species richness in relation to salinity and waterlogging: a case study along the Adelaide River floodplain, northern Australia. Global Ecology and Biogeography Letters 7, 73-82.
| Crossref | Google Scholar |

Banin L, Lewis SL, Lopez-Gonzalez G, Baker TR, Quesada CA, Chao K-J, Burslem DFRP, Nilus R, Salim AK, Keeling HC, Tan S, Davies SJ, Mendoza AM, Vasquez R, Lloyd J, Neill DA, Pitman N, Phillips OL (2014) Tropical forest wood production: a cross-continental comparison. Journal of Ecology 102, 1025-1037.
| Crossref | Google Scholar |

Bartley R, Keen RJ, Hawdon AA, Hairsine PB, Disher MG, Kinsey-Henderson AE (2008) Bank erosion and channel width change in a tropical catchment. Earth Surface Processes and Landforms 33, 2174-2200.
| Crossref | Google Scholar |

Bosire JO, Dahdouh-Guebas F, Walton M, Crona BI, Lewis RR III, Field C, Kairo JG, Koedam N (2008) Functionality of restored mangroves: a review. Aquatic Botany 89, 251-259.
| Crossref | Google Scholar |

Boto KG, Wellington JT (1983) Phosphorus and nitrogen nutritional status of a northern Australian mangrove forest. Marine Ecology Progress Series 11, 63-69.
| Crossref | Google Scholar |

Boto KG, Wellington JT (1984) Soil characteristics and nutrient status in a northern Australian mangrove forest. Estuaries 7, 61-69.
| Crossref | Google Scholar |

Breiman L (2001) Statistical modeling: the two cultures. Statistical Science 16, 199-231.
| Crossref | Google Scholar |

Bryan-Brown DN, Connolly RM, Richards DR, Adame F, Friess DA, Brown CJ (2020) Global trends in mangrove forest fragmentation. Scientific Reports 10, 7117.
| Crossref | Google Scholar | PubMed |

Bunt JS, Williams WT, Clay HJ (1982) River water salinity and the distribution of mangrove species along several rivers in north Queensland. Australian Journal of Botany 30, 401-412.
| Crossref | Google Scholar |

Bunt JS, Williams WT, Bunt D (1985) Mangrove species distribution in relation to tide at the seafront and up rivers. Australian Journal of Marine and Freshwater Research 36, 481-492.
| Crossref | Google Scholar |

Cadotte MW, Carscadden K, Mirotchnick N (2011) Beyond species: functional diversity and the maintenance of ecological processes and services. Journal of Applied Ecology 48, 1079-1087.
| Crossref | Google Scholar |

Cardinale BJ, Wright JP, Cadotte MW, Carroll IT, Hector A, Srivastava DS, Loreau M, Weis JJ (2007) Impacts of plant diversity on biomass production increase through time because of species complementarity. Proceedings of the National Academy of Science 104, 18123-18128.
| Crossref | Google Scholar |

Chave J, Condit R, Aguilar S, Hernandez A, Lao S, Perez R (2004) Error propagation and scaling for tropical forest biomass estimates. Philosophical Transactions of the Royal Society of London – B. Biological Sciences 359, 409-420.
| Crossref | Google Scholar |

Chowdhury MQ, Sarker SK, Gupta AD, Datta A (2023) Radial growth in mangrove Xylocarpus granatum J. Koenig is driven by salinity in the Sundarbans, Bangladesh. Dendrochronologia 79, 126082.
| Crossref | Google Scholar |

Cintron G, Novelli YS (1984) Methods for studying mangrove structure. In ‘The mangrove ecosystem: research methods’. (Eds S Snedaker, M Snedaker) pp. 91–113. (UNESCO: Paris, France)

Clough BF (2013) ‘Continuing the journey amongst mangroves.’ (International Society for Mangrove Ecosystems, Okinawa and International Tropical Timber Organization, Yokohama, Japan)

Clough BF, Scott K (1989) Allometric relationships for estimating above-ground biomass in six mangrove species. Forest Ecology and Management 27, 117-127.
| Crossref | Google Scholar |

Clough BF (1992) Primary productivity and the growth of mangrove forests. In ‘Tropical mangrove ecosystem’. (Eds AI Robertson, DM Alongi) pp. 225–250. (American Geophysical Union: Washington, DC, USA)

Cole TG, Ewel KC, Devoe NN (1999) Structure of mangrove trees and forests in Micronesia. Forest Ecology and Management 117, 95-109.
| Crossref | Google Scholar |

Devoe NN, Cole TG (1998) Growth and yield in mangrove forests of the Federated States of Micronesia. Forest Ecology and Management 103, 33-48.
| Crossref | Google Scholar |

De’ath G (2007) Boosted trees for ecological modelling and prediction. Ecology 88, 243-251.
| Crossref | Google Scholar |

Duke NC (1992) Mangrove floristics and biogeography. In ‘Tropical Mangrove Ecosystems’. (Eds AI Robertson, DM Alongi) pp. 63–100. (American Geophysical Union: Washington, DC, USA)

Duke NC, Ball MC, Ellison JC (1998) Factors influencing biodiversity and distributional gradients in mangroves. Global Ecology and Biogeography Letters 7, 27-47.
| Crossref | Google Scholar |

Duke NC, Meynecke J-O, Dittmann S, Ellison AM, Anger K, Berger U, Cannicci S, Diele K, Ewel KC, Field CD, Koedam N, Lee SY, Marchand C, Nordhaus I, Dahdouh-Guebas F (2007) A world without mangroves? Science 317, 41-42.
| Crossref | Google Scholar | PubMed |

Elith J, Leathwick JR, Hastie T (2008) A working guide to boosted regression trees. Journal of Animal Ecology 77, 802-813.
| Crossref | Google Scholar |

Ellison AM (2000) Mangrove restoration: do we know enough? Restoration Ecology 8, 219-229.
| Crossref | Google Scholar |

English S, Wilkinson C, Baker V (Eds) (1997) Survey manual for tropical marine resources, 2nd edn. (Published on behalf of ASEAN–Australia Marine Science Project: Living Coastal Resources. Australian Institute of Marine Science) Available at https://www.aims.gov.au/sites/default/files/Survey%20Manual-sm01.pdf

Ewel KC, Twilley RR, Ong JE (1998) Different kinds of mangrove forests provide different goods and services. Global Ecology and Biogeography Letters 7, 83-94.
| Crossref | Google Scholar |

Friess DA, Rogers K, Lovelock CE, Krauss KW, Hamilton SE, Lee SY, Lucas R, Primavera J, Rajkaran A, Shi S (2019) The state of the world’s mangrove forests: past, present, and future. Annual Review of Environmental Research 44, 89-115.
| Crossref | Google Scholar |

Friess DA, Yando ES, Abuchahla GMO, Adams JB, Cannicci S, Canty SWJ, Cavanaugh KC, Connolly RM, Cormier N, Dahdouh-Guebas F, Diele K, Feller IC, Fratini S, Jennerjahn TC, Lee SY, Ogurcak DE, Ouyang X, Rogers K, Rowntree JK, Sharma S, Sloey TM, Wee AKS (2020) Mangroves give cause for conservation optimism, for now. Current Biology 30, R135-R15.
| Crossref | Google Scholar |

Gu H, Wang J, Ma L, Shang Z, Zhang Q (2019) Insights into the BRT (boosted regression trees) method in the study of the climate–growth relationship of Masson pine in subtropical China. Forests 10, 228.
| Crossref | Google Scholar |

Hagger V, Worthington TA, Lovelock CE, Adame MF, Amano T, Brown BM, Friess DA, Landis E, Mumby PJ, Morrison TH, O’Brien KR, Wilson KA, Zganjar C, Saunders MI (2022) Drivers of global mangrove loss and gain in social-ecological systems. Nature Communications 13, 6373.
| Crossref | Google Scholar | PubMed |

Hancock GJ, Murray AS, Brunskill GJ, Argent RM (2006) Ra isotopes in trees: their application to the estimation of heartwood growth rates and tree ages. Global Biogeochemical Cycles 20, GB4007.
| Crossref | Google Scholar |

Holliday D, Stieglitz TC, Ridd PV, Read WW (2007) Geological controls and tidal forcing of submarine groundwater discharge from a confined aquifer in a coastal sand dune system. Journal of Geophysical Research 112, C04015.
| Crossref | Google Scholar |

Horn AM (1995) ‘Surface Water Resources of Cape York Peninsula.’ (Cape York Peninsula Land Use Strategy, Office of the Co-ordinator General of Queensland, Brisbane, Qld, Australia; Department of the Environment, Sport and Territories, Canberra, ACT, Australia; and Queensland Department of Primary Industries)

Howley C (2016) Eastern Cape York sediment and nutrient load report: empirical load estimates from the Normanby, Annan and Pascoe Rivers. Technical report for the Cape York Water Quality Improvement Plan, Appendix 8, Cape York Natural Resource Management.

Hutchison C, Gravel D, Guichard F, Potvin C (2018) Effect of diversity on growth, mortality, and loss of resilience to extreme climate events in a tropical planted forest experiment. Scientific Reports 8, 15443.
| Crossref | Google Scholar | PubMed |

Huxham M, Kumara MP, Jayatissa LP, Krauss KW, Kairo J, Langat J, Mencuccini M, Skov MW, Kirui B (2010) Intra- and interspecific facilitation in mangroves may increase resilience to climate change threats. Philosophical Transactions of the Royal Society B 365, 2127-2135.
| Crossref | Google Scholar |

Japan Association for Mangroves (1997) Final report of the ITTO project on development and dissemination of re-afforestation techniques of mangrove forests (PD 11/92 Rev. 1 F). JAM, Tokyo, Japan.

Kauffman JB, Donato DC (2012) ‘Protocols for the measurement, monitoring and reporting of structure, biomass and carbon stocks in mangrove forests.’ (Center for International Forestry Research: Bogor, Indonesia)

Komiyama A, Ong JE, Poungparn S (2008) Allometry, biomass, and productivity of mangrove forests: a review. Aquatic Botany 89, 128-137.
| Crossref | Google Scholar |

Krauss KW, Osland MJ (2020) Tropical cyclones and the organization of mangrove forests: a review. Annals of Botany 125, 213-234.
| Google Scholar | PubMed |

Krauss KW, Doyle TW, Twilley RR, Rivera-Monroy VH, Sullivan JK (2006) Evaluating the relative contributions of hydroperiod and soil fertility on growth of south Florida mangroves. Hydrobiologia 569, 311-324.
| Crossref | Google Scholar |

Krauss KW, Lovelock CE, McKee KL, Hoffman LL, Ewe SML, Sousa WP (2008) Environmental drivers in mangrove establishment and early development: a review. Aquatic Botany 89, 105-127.
| Crossref | Google Scholar |

Lee SY, Primavera JH, Dahdouh-Guebas F, McKee K, Bosire JO, Cannicci S, Diele K, Fromard F, Koedam N, Marchand C, Mendelssohn I, Mukherjee N, Record S (2014) Ecological role and services of tropical mangrove ecosystems: a reassessment. Global Ecology and Biogeography 23, 726-743.
| Crossref | Google Scholar |

Lee SY, Hamilton S, Barbier EB, Primavera J, Lewis JJ III (2019) Better restoration policies are needed to conserve mangrove ecosystems. Nature Ecology and Evolution 3, 870-872.
| Crossref | Google Scholar | PubMed |

Lewis SL, Phillips OL, Sheil D, Vinceti B, Baker TR, Brown S, Graham AW, Higuchi N, Hilbert DW, Laurance WF, Lejoly J, Malhi Y, Monteagudo A, Vargas PN, Sonke B, Nur Supardi MN, Terborgh JW, Martinez RV (2004) Tropical forest tree mortality, recruitment and turnover rates: calculation, interpretation and comparison when census intervals vary. Journal of Ecology 92, 929-944.
| Crossref | Google Scholar |

McCloskey GL, Waters DK, Ellis R, Carroll C (2014) Modelling reductions of pollutant loads due to improved management practices in the Great Barrier Reef catchments – Cape York NRM region, Technical Report, Vol. 2, Department of Natural Resources and Mines, Cairns, Qld, Australia.

McKee KL, Faulkner PL (2000) Restoration of biogeochemical function in mangrove forests. Restoration Ecology 8, 247-259.
| Crossref | Google Scholar |

Mulyadi A, Amin B (2016) Vegetation structure and mangrove ecosystem threats in the coastal zone of Dumai, Riau, Indonesia. International Journal of Applied Environmental Science 11, 785-798.
| Google Scholar |

Njana MA (2020) Structure, growth, and sustainability of mangrove forests of mainland Tanzania. Global Ecology and Conservation 24, e01394.
| Crossref | Google Scholar |

Nur-Fatehah SR, Nur-Shafikah I, Shamsul K, Wan-Juliana WA, Norela Sulaiman N, Shahril MH, Nurul-Darsani AD (2022) Stand structure and productivity of the firefly riverine mangrove habitat at three rivers in peninsular Malaysia. Journal of Tropical Forest Science 34, 114-126.
| Crossref | Google Scholar |

O’Connell DP, Fusi M, Djamaluddin R, Rajagukguk BB, Bachmid F, Kitson JJN, Dunnett Z, Tranto A, Tjoa AB, Diele K, Evans DM (2021) Assessing mangrove restoration practices using species-interaction networks. Restoration Ecology 30(4), e13546.
| Crossref | Google Scholar |

Peters R, Walther M, Lovelock C, Jiang J, Berger U (2020) The interplay between vegetation and water in mangroves: new perspectives for mangrove stand modelling and ecological research. Wetlands Ecology and Management 28, 697-712.
| Crossref | Google Scholar |

Phillips OL, Malhi Y, Vinceti B, Baker YT, Lewis SL, Higuchi N, Laurance WF, Núñez Vargas P, Vásquez Martinez R, Laurance S, Ferreira LV, Stern M, Brown S, Grace J (2002) Changes in growth of tropical forests: evaluating potential biases. Ecological Applications 12, 576-587.
| Crossref | Google Scholar |

Pickup G, Marshall AR (2008) Geomorphology, hydrology, and climate of the Fly River system. Developments in Earth and Environmental Sciences 9, 3-49.
| Google Scholar |

Poungparn S, Komiyama A, Sangteian T, Maknual C, Patanaponpaiboon P, Suchewaboripont V (2012) High primary productivity under submerged soil raises the net ecosystem productivity of a secondary mangrove forest in eastern Thailand. Journal of Tropical Ecology 28, 303-306.
| Crossref | Google Scholar |

Rahman MM, Mahmud MA (2018) Economic feasibility of mangrove restoration in the southeastern coast of Bangladesh. Ocean and Coastal Management 161, 211-221.
| Crossref | Google Scholar |

Rahman MM, Zimmer M, Ahmed I, Donato D, Kanzaki M, Xu M (2021) Co-benefits of protecting mangroves for biodiversity conservation and carbon storage. Nature Communications 12, 3875.
| Crossref | Google Scholar |

Robert EMR, Schmitz N, Okello JA, Boeren I, Beeckman H, Koedam N (2011) Mangrove growth rings: fact or fiction? Trees 25, 49-58.
| Crossref | Google Scholar |

Robertson AI, Giddins R, Smith TJ (1990) Seed predation by insects in tropical mangrove forests: extent and effects on seed viability and the growth of seedlings. Oecologia 83, 213-219.
| Crossref | Google Scholar | PubMed |

Robertson AI, Daniel PA, Dixon P (1991) Mangrove forest structure and productivity in the Fly River estuary, Papua New Guinea. Marine Biology 111, 147-155.
| Crossref | Google Scholar |

Robertson AI, Dixon P, Daniel PA, Zagorskis I (2020) Primary production in forests of the mangrove palm Nypa fruticans. Aquatic Botany 167, 103288.
| Crossref | Google Scholar |

Robertson AI, Dixon P, Zagorskis I (2021) Phenology and litter production in the mangrove genus Xylocarpus along rainfall and temperature gradients in tropical Australia. Marine and Freshwater Research 72, 551-562.
| Crossref | Google Scholar |

Rog SM, Clarke RH, Cook CN (2017) More than marine: revealing the critical importance of mangrove ecosystems for terrestrial vertebrates. Diversity and Distributions 23, 221-230.
| Crossref | Google Scholar |

Rovai A, Twilley RR, Castañeda Moya E, Midway SR, Friess DA, Trettin CC, Bukoski JJ, Stovall AEL, Pagliosa PR, Fonseca AL, Mackenzie RA, Aslan A, Sasmito SD, Sillanpää M, Cole TG, Purbopuspito J, Warre MW, Murdiyarso D, Mofu W, Sharma S, Tinh PH, Riul P (2021) Macroecological patterns of forest structure and allometric scaling in mangrove forests. Global Ecology and Biogeography 30, 1000-1013.
| Crossref | Google Scholar |

Saenger P (2002) ‘Mangrove ecology, silviculture and conservation.’ (Kluwer Academic Publishers: Dortrecht, Netherlands)

Saenger P, Siddiqi NA (1993) Land from the sea: the mangrove afforestation program of Bangladesh. Ocean and Coastal Management 20, 23-39.
| Crossref | Google Scholar |

Shah K, Kamal AHM, Rosli Z, Hakeem KR, Hoque MM (2016) Composition and diversity of plants in Sibuti mangrove forest, Sarawak, Malaysia. Forest Science and Technology 12, 70-76.
| Crossref | Google Scholar |

Siddiqi HASM, Hasan SM, Rahman MM (2020) Influence of spacing on growth of dhundul (Xylocarpus granatum) in the Sundarbans of Bangladesh. International Journal of Research and Innovations in Earth Science 7, 2394-1375.
| Google Scholar |

Sillanpää M, Vantellingen J, Friess DA (2017) Vegetation regeneration in a sustainably harvested mangrove forest in West Papua, Indonesia. Forest Ecology and Management 390, 137-146.
| Crossref | Google Scholar |

Simard M, Fatoyinbo L, Smetanka C, Rivera-Monroy VH, Castañeda-Moya E, Thomas N, Van der Stocken T (2019) Mangrove canopy height globally related to precipitation, temperature and cyclone frequency. Nature Geoscience 12, 40-45.
| Crossref | Google Scholar |

Smith TJ, III, Boto KG, Frusher SD, Giddins RL (1991) Keystone species and mangrove forest dynamics – the influence of burrowing by crabs on soil nutrient status and forest productivity. Estuarine, Coastal and Shelf Science 33, 419-432.
| Crossref | Google Scholar |

Smith TJ III (1992) Forest structure. In ‘Tropical mangrove ecosystems’. (Eds AI Robertson, DM Alongi) pp. 101–136. (American Geophysical Union, Washington, DC, USA)

Stieglitz T, Ridd P, Muller P (2000) Passive irrigation and functional morphology of crustacean burrows in a tropical mangrove swamp. Hydrobiologia 421, 69-76.
| Crossref | Google Scholar |

Sukardjo S (1998) Xylocarpus granatum J.Konig. In ‘Plant Resources of South-East Asia Number 5(3), Timber Trees: lesser-known timbers’. Database record 6491. (Eds MSM Sosef, LT Hong, S Prawirohatmodjo): (PROSEA Foundation: Bogor, Indonesia) Available at https://prosea.prota4u.org/view.aspx?id=6491

Trettin CC, Stringer CE, Zarnoch SJ (2016) Composition, biomass and structure of mangroves within the Zambezi River Delta. Wetland Ecology and Management 24, 173-186.
| Crossref | Google Scholar |

United Nations Development Programme and United Nations Educational, Scientific and Cultural Organization (1991) Research and its application to mangrove ecosystems management in Asia and the Pacific. Final report of the integrated multidisciplinary survey and research programme of the Ranong mangrove ecosystem, UNDP/RAS/86/120. (UNDP, UNESCO: Bangkok, Thailand) Available at https://unesdoc.unesco.org/ark:/48223/pf0000090754

Xiong Y, Cakir R, Phan SM, Ola A, Krauss KW, Lovelock CE (2019a) Global patterns of tree stem growth and stand aboveground wood production in mangrove forests. Forest Ecology and Management 444, 382-392.
| Crossref | Google Scholar |

Xiong Y, Cakir R, Phan SM, Ola A, Krauss KW, Lovelock CE (2019b) Data from: global patterns of tree stem growth and stand aboveground wood production in mangrove forests [Dataset]. Dryad
| Crossref | Google Scholar |

Zanne AE, Lopez-Gonzalez G, Coomes DA, Ilic J, Jansen S, Lewis SL, Miller RB, Swenson NG, Wiemann MC, Chave J (2009) Global Wood Density Database. (Dryad Digital Repository) [Dataset] doi:10.5061/DRYAD.234/1