Estimation of the number of tree species in French Guiana by extrapolation of permanent plots richness

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-05 DOI:10.1017/s0266467424000099

Eric Marcon, Ariane Mirabel, Jean-François Molino, Daniel Sabatier

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Abstract

The biodiversity of tropical rainforest is difficult to assess. Yet, its estimation is necessary for conservation purposes, to evaluate our level of knowledge and the risks faced by the forest in relation to global change. Our contribution is to estimate the regional richness of tree species from local but widely spread inventories. We reviewed the methods available, which are nonparametric estimators based on abundance or occurrence data, log-series extrapolation and the universal species–area relationship based on maximum entropy. Appropriate methods depend on the scale considered. Harte’s self-similarity model is suitable at the regional scale, while the log-series extrapolation is not. GuyaDiv is a network of forest plots installed over the whole territory of French Guiana, where trees over 10 cm DBH are identified. We used its information (1315 species censused in 68 one-hectare plots) to estimate the exponent of the species–area relationship, assuming Arrhenius’s power law. We could then extrapolate the number of species from three local, wide inventories (over 2.5 km2). We evaluated the number of tree species around 2200 over the territory.

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通过永久地块丰富度外推法估算法属圭亚那的树种数量

热带雨林的生物多样性很难评估。然而，出于保护目的、评估我们的知识水平以及森林在全球变化中面临的风险，有必要对其进行评估。我们的贡献在于从当地但分布广泛的清单中估算出区域树种的丰富程度。我们回顾了现有的方法，包括基于丰度或出现数据的非参数估计法、对数序列外推法和基于最大熵的通用物种-面积关系法。合适的方法取决于所考虑的尺度。哈特的自相似模型适用于区域尺度，而对数序列外推法则不适用。GuyaDiv 是一个遍布法属圭亚那全境的森林地块网络，对 DBH 超过 10 厘米的树木进行识别。我们利用其信息（在 68 块一公顷的地块上普查了 1315 个物种），假设阿伦尼斯的幂律，估算出物种与面积关系的指数。这样，我们就可以推断出三个地方性大范围普查（超过 2.5 平方公里）的物种数量。我们估算出全境的树种数量约为 2200 种。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.