Regional and fine-scale local adaptation in salinity tolerance in Daphnia inhabiting contrasting clusters of inland saline waters

Freshwater salinisation is an important threat to biodiversity, ecosystem functioning, and the provision of ecosystem services. Therefore, understanding the capacity of species to adapt to salinity gradients is crucial. Clusters of naturally saline habitats represent ideal test cases to study the extent and scale of local adaptation to salinisation. We studied local genetic adaptation of the water flea Daphnia magna, a key component of pond food webs, to salinity in two contrasting landscapes - a dense cluster of sodic bomb crater ponds and a larger-scale cluster of soda pans. We show regional differentiation in salinity tolerance reflecting the higher salinity levels of soda pans versus bomb crater ponds. We found local adaptation to differences in salinity levels at the scale of tens of metres among bomb crater pond populations but not among geographically more distant soda pan populations. The population-level salinity tolerance range was reduced in more saline bomb crater ponds thro..., , , # Data from: Regional and fine-scale local adaptation in salinity tolerance in Daphnia inhabiting contrasting clusters of inland saline waters

Brief summary

The data package contains two datasets:

* Brans_et_al_data_2024_raw.csv
* Brans_et_al_data_2024_EC50 and environmental variables.csv

Datasets of the recorded variables

(1) Brans_et_al_data_2024_raw.csv
This dataset contains information on the survival of Daphnia magna after 24 and 48 hours of exposure to the experimental salinity levels. For details on the experiment, sampling, and sample processing, see Brans et al. (2024).

Variable names with descriptions:
*pond type: type of original habitat of the Daphnia populations, i.e. soda pan (SP) or bomb crater pond (BC).
*pop: The ID of the pond of origin of each Daphnia population. IDs of bomb crater ponds are numbers given by the authors at the first mapping of all ponds in 2014. Abbreviations for soda pans: APME - Apetloner Meierhoflacke, HERR - Herrnsee, MSTI - Mittlerer ...

淡水盐化是威胁生物多样性、生态系统功能与生态系统服务供给的重要胁迫因子。因此，解析物种对盐度梯度的适应能力至关重要。自然盐生栖息地集群是研究盐化环境下局部适应的范围与尺度的理想研究模型。本研究针对两种截然不同景观中的池塘食物网关键组分——大型溞（Daphnia magna）的盐度局部遗传适应展开探究：其一为苏打型炸弹坑池塘密集集群，其二为规模更大的苏打浅塘集群。研究结果显示，大型溞的盐度耐受度存在区域分化，这与苏打浅塘相较于炸弹坑池塘更高的盐度水平相契合。我们发现，在炸弹坑池塘种群中，数十米尺度范围内的种群已演化出针对盐度差异的局部适应，但在地理距离更远的苏打浅塘种群中并未观察到此现象。在盐度更高的炸弹坑池塘中，种群水平的盐度耐受范围有所缩减……，# 数据来源：《内陆盐水环境集群中溞类盐度耐受度的区域与精细尺度局部适应》（Brans et al., 2024）

简要概述
本数据包包含两份数据集：
* Brans_et_al_data_2024_raw.csv
* Brans_et_al_data_2024_EC50 and environmental variables.csv

记录变量数据集
(1) Brans_et_al_data_2024_raw.csv
本数据集包含大型溞在暴露于实验设置的盐度水平下24小时与48小时后的存活数据。有关实验设计、采样流程与样本处理的详细内容，请参阅Brans等人（2024）的研究。

变量名称及说明：
*pond type：大型溞种群的原生栖息地类型，即苏打浅塘（SP）或炸弹坑池塘（BC）。
*pop：每个大型溞种群来源池塘的唯一标识ID。炸弹坑池塘的ID为作者2014年首次对所有池塘进行测绘时赋予的数字编号。苏打浅塘的缩写如下：APME - Apetloner Meierhoflacke，HERR - Herrnsee，MSTI - Mittlerer……