Tropical forest wood production: a cross-continental comparison
Tropical forest wood production: a cross-continental comparison
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DOI：
10.1111/1365-2745.12263
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发表时间：
2014-07-01
影响因子：
5.5
通讯作者：
Phillips, Oliver L.
中科院分区：
文献类型：
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作者：
Banin, Lindsay;Lewis, Simon L.;Phillips, Oliver L.
1. 热带森林地上木材产量（AGWP）随环境梯度变化很大。一些证据表明，AGWP 可能因地区而异，特别是亚洲森林的 AGWP 特别高。然而，缺乏使用标准化方法进行跨生物地理区域的比较，限制了我们对 AGWP 的泛热带变化和潜在原因的评估。2．我们对亚马逊西北部（17 个长期森林样地）和婆罗洲北部（11 个样地）的 AGWP 进行了采样，这两个地区全年降水量丰富。在每个区域内，使用标准化土壤和森林测量技术对生长在各种土壤条件下的森林进行了采样。3．婆罗洲的地块 AGWP 比亚马逊地区高 49%（分别为 9.73 +/- 0.56 与 6.53 +/- 0.34 毫克干质量 ha(-1) a(-1)；区域平均值 +/- 1 SE）。 AGWP 与土壤肥力（PCA 轴、碱基总和和总 P）呈正相关。在控制土壤环境后，婆罗洲地块的 AGWP 仍然显着较高。 AGWP 的差异主要归因于两个地区不同的高度直径异速生长以及婆罗洲大树的丰富度。造成这种情况的部分原因可能是婆罗洲的太阳辐射比亚马逊流域西北部更强。4。属于东南亚主要科龙脑香科的树木比其他同类邻近的非龙脑香科树木获得木质生物量的速度更快，这意味着婆罗洲森林的异常生产可能是由植物区系元素驱动的。这个占主导地位的东南亚家族可能会以不同的方式分配生物质，或者在收获资源并将其转化为木质生物质方面更有效。5。合成。当土壤条件和降雨量受到控制时，婆罗洲北部森林的 AGWP 率比亚马逊西北部的森林高得多。更大的资源可用性和高产的龙脑香科植物相结合，可以解释为什么亚洲森林生产木材的速度比亚马逊同类森林快一半。我们的结果还表明，分类群体捕获碳的基本能力不同，因此，由于生物地理历史，不同的热带地区可能具有不同的碳吸收能力。
1. Tropical forest above-ground wood production (AGWP) varies substantially along environmental gradients. Some evidence suggests that AGWP may vary between regions and specifically that Asian forests have particularly high AGWP. However, comparisons across biogeographic regions using standardized methods are lacking, limiting our assessment of pan-tropical variation in AGWP and potential causes.2. We sampled AGWP in NW Amazon (17 long-term forest plots) and N Borneo (11 plots), both with abundant year-round precipitation. Within each region, forests growing on a broad range of edaphic conditions were sampled using standardized soil and forest measurement techniques.3. Plot-level AGWP was 49% greater in Borneo than in Amazonia (9.73 +/- 0.56 vs. 6.53 +/- 0.34 Mg dry mass ha(-1) a(-1), respectively; regional mean +/- 1 SE). AGWP was positively associated with soil fertility (PCA axes, sum of bases and total P). After controlling for the edaphic environment, AGWP remained significantly higher in Bornean plots. Differences in AGWP were largely attributable to differing height-diameter allometry in the two regions and the abundance of large trees in Borneo. This may be explained, in part, by the greater solar radiation in Borneo compared with NW Amazonia.4. Trees belonging to the dominant SE Asian family, Dipterocarpaceae, gained woody biomass faster than otherwise equivalent, neighbouring non-dipterocarps, implying that the exceptional production of Bornean forests may be driven by floristic elements. This dominant SE Asian family may partition biomass differently or be more efficient at harvesting resources and in converting them to woody biomass.5. Synthesis. N Bornean forests have much greater AGWP rates than those in NW Amazon when soil conditions and rainfall are controlled for. Greater resource availability and the highly productive dipterocarps may, in combination, explain why Asian forests produce wood half as fast again as comparable forests in the Amazon. Our results also suggest that taxonomic groups differ in their fundamental ability to capture carbon and that different tropical regions may therefore have different carbon uptake capacities due to biogeographic history.