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

IF 1.8 4区环境科学与生态学 Q2 FISHERIES

Marine and Freshwater Research Pub Date : 2024-05-31 DOI:10.1071/mf23246

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

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引用次数: 0

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.

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混交种红树林中木菠萝的森林结构、树木生长和木材产量的环境预测因素

背景由于使用的物种范围有限，已恢复的红树林受到威胁。木菠萝具有优良的木材品质，可为红树林种植带来附加值。方法在澳大利亚北部和巴布亚新几内亚的 40 个地点测量了森林结构和环境变量。在 18 个地点测量了树木生长情况。通过增量回归树木建模，确定了 X. granatum 地面生物量（AGBX）、X. granatum 胸径（DBH）年平均增量（MAIX）和木材产量（PW）的环境预测变量。目的确定X. granatum生物量和生长量最大的环境条件。主要结果增加茎干密度、基部面积和其他树种的 AGB 是限制 AGBX 的最重要因素。当沉积物氧化还原电位为100 mV、流域年平均降雨量为4000 mm时，MAIX（范围为0.03-0.55 cm year-1）最大。MAIX随着平均最低气温、沉积物淤泥百分比和磷百分比的增加而增加。PW随所有物种的茎干密度降低而降低，随淤泥比例增加而增加，当沉积物氧化还原电位为180 mV时，PW随淤泥比例增加而增加。结论与启示在最佳条件下，X. granatum的生长速度与大多数红树林物种一样快，可以作为恢复项目中使用的物种组合中的一种极好的、可收获的补充。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine and Freshwater Research 环境科学-海洋学

CiteScore

4.60

自引率

5.60%

发文量

审稿时长

3.8 months

期刊介绍： Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed. Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences. Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.