Mangrove above-ground biomass and production is related to forest age on the Great Barrier Reef

Mangrove above-ground biomass and production is related to forest age on the Great Barrier Reef | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Ecology and Evolution This is a preprint and has not been peer reviewed. Data may be preliminary. 29 March 2025 V1 Latest version Share on Mangrove above-ground biomass and production is related to forest age on the Great Barrier Reef Authors : Brooke Conroy 0000-0001-5907-8265 [email protected] , Sarah Hamylton , Jeffrey Kelleway , Emma Asbridge , Colin D. Woodroffe , and Kerrylee Rogers 0000-0003-1350-4737 Authors Info & Affiliations https://doi.org/10.22541/au.174324516.69644068/v1 409 views 222 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Above-ground biomass contributes a large proportion of mangrove carbon stock; however, spatio-temporal dynamics of biomass are poorly understood in carbonate settings of the Southern Hemisphere. This influences capacity to accurately project the effects of accelerating sea-level rise on this important carbon store. Here, above-ground biomass and productivity dynamics were quantified across mangrove age zones dominated by Rhizophora stylosa, spanning a tidal gradient atop a reef platform on Low Isles, Great Barrier Reef, Australia. Above-ground biomass was extrapolated across the forest using field plot data, allometry, a canopy height model derived from remotely piloted aircraft (RPA) LiDAR and regression analyses. Above-ground biomass production was calculated as mean annual biomass increments and canopy production was determined using RPA-multispectral imagery and a Normalised Difference Vegetation Index. Mangrove above-ground biomass was estimated at 519.7 ± 3.11 t ha-1 and increased with age up to the oldest forest (812.0 ± 12.9 t ha-1), believed to be ~135 ± 40 years old. Above-ground biomass was explained by age and tidal position (r2 >0.8), with a positive association between the two predictor variables. Above-ground biomass production peaked at lowest intertidal positions in the youngest forest aged <11 years at 36.3 t ha-1 yr-1, steadying thereafter, with a mean of 12.5 ± 5.4 t ha-1 yr-1 across the island. Production in the canopy remained high until the oldest forest and was negatively associated with age and tidal position (r2 >0.9). Declining production in the older zones corresponded to forest ageing, tidal positions becoming suboptimal for growth and increased exposure to prevailing winds and cyclones. By developing relationships between above-ground biomass accumulation and age and tidal position, this study informs parameterisation of models of the response of biomass to sea-level rise but requires additional information about relationships between substrate evolution, forest development and age. Supplementary Material File (lowisles_agb_manuscript_ecolevol_v1.docx) Download 16.72 MB Information & Authors Information Version history V1 Version 1 29 March 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Collection Ecology and Evolution Keywords ecosystem ecology marine natural history plants terrestrial Authors Affiliations Brooke Conroy 0000-0001-5907-8265 [email protected] University of Wollongong View all articles by this author Sarah Hamylton University of Wollongong View all articles by this author Jeffrey Kelleway University of Wollongong View all articles by this author Emma Asbridge University of Wollongong View all articles by this author Colin D. Woodroffe University of Wollongong View all articles by this author Kerrylee Rogers 0000-0003-1350-4737 University of Wollongong View all articles by this author Metrics & Citations Metrics Article Usage 409 views 222 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Brooke Conroy, Sarah Hamylton, Jeffrey Kelleway, et al. Mangrove above-ground biomass and production is related to forest age on the Great Barrier Reef. Authorea . 29 March 2025. DOI: https://doi.org/10.22541/au.174324516.69644068/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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