Biased-corrected richness estimates for the Amazonian tree flora

Biased-corrected richness estimates for the Amazonian tree flora
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亚马逊树木区系的偏差校正丰富度估计

DOI:
10.1038/s41598-020-66686-3
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发表时间:
2020
期刊:
影响因子:
4.6
通讯作者:
Castilho, Carolina V.
Castilho, Carolina V.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
ter Steege, Hans;Prado, Paulo I.;Lima, Renato A.;Pos, Edwin;de Souza Coelho, Luiz;de Andrade Lima Filho, Diogenes;Salomão, Rafael P.;Amaral, Iêda Leão;de Almeida Matos, Francisca Dionízia;Castilho, Carolina V.

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亚马逊森林非常多样化,但估计的物种丰富度存在很大争议。在这里,我们应用一个合奏的参数估计和一种新的技术,包括同种空间聚集到一个扩展的数据库的森林地块与最新的分类。我们发现,亚马逊河流域的物种多度分布是最好的近似与聚集的个人,聚集与稀有性增加的对数序列。通过平均几种方法来估计总的丰富度,我们确认,超过15,000树种预计将出现在亚马逊河流域。我们还表明,使用10倍数量的地块将导致增加到这15,000个估计物种的50%。为了获得所有树种的更完整样本,可能需要进行严格的实地调查,但亚马逊河流域的树木数量在未来几年仍将是一个估计数。
Amazonian forests are extraordinarily diverse, but the estimated species richness is very much debated. Here, we apply an ensemble of parametric estimators and a novel technique that includes conspecific spatial aggregation to an extended database of forest plots with up-to-date taxonomy. We show that the species abundance distribution of Amazonia is best approximated by a logseries with aggregated individuals, where aggregation increases with rarity. By averaging several methods to estimate total richness, we confirm that over 15,000 tree species are expected to occur in Amazonia. We also show that using ten times the number of plots would result in an increase to just ~50% of those 15,000 estimated species. To get a more complete sample of all tree species, rigorous field campaigns may be needed but the number of trees in Amazonia will remain an estimate for years to come.
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