Testing metabolic ecology theory for allometric scaling of tree size, growth and mortality in tropical forests
Testing metabolic ecology theory for allometric scaling of tree size, growth and mortality in tropical forests
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DOI：
10.1111/j.1461-0248.2006.00904.x
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发表时间：
2006-05-01
期刊：
影响因子：
8.8
通讯作者：
Ashton, P
中科院分区：
文献类型：
--
作者：
Muller-Landau, HC;Condit, RS;Ashton, P
代谢生态学理论预测了树干直径、生物量、树高、生长和死亡之间的特定关系。由于人口统计率对估计森林中的碳通量很重要，这一理论可能为全球碳预算提供重要见解，值得仔细评估。我们收集了来自10个古老的热带森林的数据，包括367公顷和> 170万棵树的普查数据，以检验理论的预测。我们还开发了一套替代预测，保留了代谢生态学的一些假设，同时还考虑了关键限制资源光的可用性如何随树木大小而变化。我们的研究结果表明，在热带森林中，树木的生长或死亡率与大小之间没有普遍的标度关系。观察到的模式与我们的替代模型在一个网站，我们有必要的数据来评估它是一致的，并在所有的森林代谢生态学的预测不一致。
The theory of metabolic ecology predicts specific relationships among tree stem diameter, biomass, height, growth and mortality. As demographic rates are important to estimates of carbon fluxes in forests, this theory might offer important insights into the global carbon budget, and deserves careful assessment. We assembled data from 10 old-growth tropical forests encompassing censuses of 367 ha and > 1.7 million trees to test the theory's predictions. We also developed a set of alternative predictions that retained some assumptions of metabolic ecology while also considering how availability of a key limiting resource, light, changes with tree size. Our results show that there are no universal scaling relationships of growth or mortality with size among trees in tropical forests. Observed patterns were consistent with our alternative model in the one site where we had the data necessary to evaluate it, and were inconsistent with the predictions of metabolic ecology in all forests.