Impact of Pleistocene climate on diversification and distribution of congeneric freshwater crustacean species

AimThe climatic oscillations of the glacial-interglacial cycles significantly influenced species diversification, playing an essential role in shaping the current patterns of biodiversity. However, the effects of the Pleistocene climate on species diversification and their current distribution are poorly understood for the Southern Hemisphere and some taxonomic groups, such as invertebrates.  Here, we explore the role of Pleistocene climate changes in the diversification and distribution of four species of South American freshwater crustaceans.
LocationSouthern South America. 
TaxonGenus Aegla (Aeglidae).
MethodsWe performed phylogenetic analyses, estimated genetic diversity, and neutrality indices for Aegla alacalufi, Aegla neuquensis, Aegla platensis, and Aegla uruguayana using nuclear and mitochondrial sequences. We used the mitochondrial genes to estimate divergence times, calculate historical demography, and reconstruct the ancestral area range. We also estimated current and past p..., Genetic and species occurrence data were obtained from the published literature, GenBank (http://www.ncbi.nlm.nih.gov/genbank) and Dryad (https://datadryad.org/stash), and encompass most of the distribution areas of each species.
We performed phylogenetic analyses, estimated genetic diversity, and neutrality indices for Aegla alacalufi, Aegla neuquensis, Aegla platensis, and Aegla uruguayana using nuclear and mitochondrial sequences. We used the mitochondrial genes to estimate divergence times, calculate historical demography, and reconstruct the ancestral area range. We also estimated current and past potential distributions using ecological niche modeling., , # Dataset Impact of Pleistocene Climate on Diversification and Distribution of Congeneric Freshwater Crustacean Species

[https://doi.org/10.5061/dryad.76hdr7t5n](https://doi.org/10.5061/dryad.76hdr7t5n)

## Description of the data and file structure

We performed phylogenetic analyses, estimated genetic diversity, and neutrality indices for *Aegla alacalufi*, *Aegla neuquensis*, *Aegla platensis*, and *Aegla uruguayana* using nuclear and mitochondrial sequences. We used the mitochondrial genes to estimate divergence times, calculate historical demography, and reconstruct the ancestral area range. We also estimated current and past potential distributions using ecological niche modeling. Genetic and species occurrence data were obtained from the published literature, GenBank ([http://www.ncbi.nlm.nih.gov/genbank](http://www.ncbi.nlm.nih.gov/genbank)) and Dryad ([https://datadryad.org](https://datadryad.org)), and are cited in the manuscript.

### Files and variables

#### File: Data\_se...

冰期-间冰期旋回的气候波动显著影响物种分化过程，在塑造当前全球生物多样性格局中发挥着至关重要的作用。然而，针对南半球以及部分类群（如无脊椎动物），更新世气候对物种分化及其当前分布格局的影响仍未得到充分解析。本研究旨在探讨更新世气候变化对4种南美淡水甲壳动物的物种分化与分布模式的影响。

研究区域：南美南部。

研究类群：Aegla属（Aeglidae）。

研究方法：本研究针对Aegla alacalufi、Aegla neuquensis、Aegla platensis及Aegla uruguayana，利用核基因与线粒体序列开展系统发育分析，估算其遗传多样性及中性检验指数。基于线粒体基因序列，我们估算了物种分化时间、计算了历史种群动态，并重建了祖先分布区范围。此外，本研究还通过生态位建模（ecological niche modeling）估算了各物种当前与历史时期的潜在分布区。遗传数据与物种出现记录均来自已发表文献、GenBank (http://www.ncbi.nlm.nih.gov/genbank)及Dryad (https://datadryad.org/stash)，覆盖了各物种的绝大部分分布区域。

# 数据集：更新世气候对同属淡水甲壳动物物种分化与分布的影响
https://doi.org/10.5061/dryad.76hdr7t5n

## 数据与文件结构说明
本研究针对Aegla alacalufi、Aegla neuquensis、Aegla platensis及Aegla uruguayana，利用核基因与线粒体序列开展系统发育分析，估算其遗传多样性及中性检验指数。基于线粒体基因序列，我们估算了物种分化时间、计算了历史种群动态，并重建了祖先分布区范围。此外，本研究还通过生态位建模估算了各物种当前与历史时期的潜在分布区。遗传数据与物种出现记录均来自已发表文献、GenBank (http://www.ncbi.nlm.nih.gov/genbank)及Dryad (https://datadryad.org)，并已在论文中予以引用。

### 文件与变量
#### 文件：Data_se...