The Interaction Between the Linnean and Darwinian Shortfalls Affects Our Understanding of the Evolutionary Dynamics Driving Diversity Patterns of New World Coralsnakes

IF 3.4 2区 环境科学与生态学 Q2 ECOLOGY
Lívia Estéfane Fernandes Frateles, Guilherme Rogie Gonçalves Tavares, Gabriel Nakamura, Nelson Jorge da Silva Jr., Levi Carina Terribile, José Alexandre F. Diniz-Filho
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Abstract

Aim

In this study, we sought to understand how the Linnean shortfall (i.e., the lack of knowledge about species taxonomy) interacts with the Darwinian shortfall (i.e., the lack of knowledge about phylogenetic relationships among species), which potentially jeopardises geographical patterns in estimates of speciation rates.

Location

New World.

Taxon

Coralsnakes (Serpentes: Elapidae).

Methods

We created an index of taxonomic uncertainty (ITU) that measures the likelihood of current species being split after undergoing future taxonomic revisions. The ITU was used in simulations where species with higher taxonomic uncertainty had a higher likelihood of having their phylogenetic branches split, generating new hypothetical species along their geographic ranges. We estimated the speciation rates before and after the split of taxonomically uncertain species.

Results

We found that a high number of coralsnake species display substantial taxonomic uncertainty, positively correlated with the latitude of the species' geographical range centroid. The estimated speciation rates based on currently available data have a weak relationship with latitude. However, after incorporating taxonomic uncertainty into the phylogeny, we detect a higher positive correlation between speciation rate and latitude.

Main Conclusions

The observed change in speciation rates following the incorporation of taxonomic uncertainty highlights how such uncertainty can undermine the empirical evaluation of geographical patterns in speciation rates, revealing an interaction between the latitudinal taxonomic gradient and the latitudinal diversity gradient. Given that taxonomic changes can alter the number of species recognised as valid over time, our study highlights the need to incorporate taxonomic uncertainty into macroecological and macroevolutionary studies, enhancing the robustness of patterns inferred from these data.

林奈学说和达尔文学说之间的相互作用影响了我们对新世界珊瑚蛇多样性模式的理解
在本研究中,我们试图了解林奈缺失(即缺乏物种分类学知识)与达尔文缺失(即缺乏物种间系统发育关系知识)之间的相互作用,这可能会危及物种形成率估计的地理格局。地点新世界。珊瑚蛇分类群(蛇纲:蛇科)。方法我们创建了一个分类不确定性指数(ITU)来衡量当前物种在经历未来分类修订后分裂的可能性。ITU被用于模拟,其中分类不确定性较高的物种更有可能将其系统发育分支分裂,从而沿着其地理范围产生新的假设物种。我们估计了分类学上不确定的物种分裂前后的物种形成率。结果大量珊瑚蛇物种的分类不确定性与物种地理范围质心纬度呈正相关。根据现有资料估计的物种形成率与纬度的关系很弱。然而,在将分类不确定性纳入系统发育后,我们发现物种形成率与纬度之间存在较高的正相关关系。分类不确定性对物种形成率的影响,揭示了物种形成率的纬度梯度与纬度多样性梯度之间的相互作用。考虑到分类学的变化会随着时间的推移而改变被认为有效的物种数量,我们的研究强调了将分类学的不确定性纳入宏观生态和宏观进化研究的必要性,以增强从这些数据推断出的模式的稳健性。
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
Journal of Biogeography
Journal of Biogeography 环境科学-生态学
CiteScore
7.70
自引率
5.10%
发文量
203
审稿时长
2.2 months
期刊介绍: Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.
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