Effects of salinization on tropical freshwater wetland primary producers and aquatic invertebrates

Sea level rise is expected to transform coastal aquatic ecosystems worldwide. The freshwater wetlands of tropical northern Australia are among the most biodiverse and productive ecosystems on the continent, but owing to high regional rates of sea level rise coupled with low-lying land and large tides, they are increasingly affected by saltwater intrusion. The propagule bank, including seeds of aquatic primary producers and eggs of aquatic invertebrates, stored in wetland sediment, is vital for the establishment of ecological communities, and ultimately for primary and secondary production. This experimental study examined the impact of increasing salinity on the emergence of primary producers and invertebrates from sediment cores collected from tropical freshwater wetlands between Darwin and Kakadu National Park in Northern Australia. Sediment cores (n=216) were placed in microcosms and inundated with one of four salinity treat..., Nine wetlands within three coastal floodplains in the Northern Territory, Australia, were sampled in October 2021. Twenty-four sediment cores were collected from each of the nine wetlands. The samples were collected from around the edge of the wetland’s remaining water while avoiding the water’s edge. The cores were collected using an 80 mm PVC pipe and trowel to remove the top 30 mm of sediment. Each core was placed into an individual 1 L plastic container and stored at room temperature at Charles Darwin University and left to dry completely for at least 26 days before the commencement of the experiment. The cores from each wetland were stored at room temperature 25 °C and exposed to 12 hr light/dark cycles of full spectrum double fluorescent lights. The 1 L containers were randomly allocated to one of four salinity microcosm treatment groups: control/0 ppt (freshwater), 5-10 ppt (approx. 7 ppt), 15-20 ppt (approx. 16 ppt), and 30-35 ppt (approx. 35ppt) (sea water), resulting in n= 216..., , # Data from: Effects of salinization on tropical freshwater wetland primary producers and aquatic invertebrates

Dataset DOI: [10.5061/dryad.8931zcs1v](https://doi.org/10.5061/dryad.8931zcs1v)

## Description of the data and file structure

The data consists of three files containing the results for zooplankton, macrophytes, and algae. This data was collected as part of the inundation salinity experiment using sediment cores from one of nine wetlands across three coastal tropical floodplains which examined the impacts of increasing salinity on emergence of primary producers and aquatic invertebrates at the start of the wet season. Files contain sample details, including treatment and wetland/catchment, as well as, the biological data of the three biota groups. 

### Files and variables

#### File: Zooplankton_R_Data_Upload.xlsx

**Description:** Results of the aquatic invertebrates collected during the experiment.

##### Variables

* Wetland: Name of wetland sediment cores were collecte...,

全球海平面上升预计将重塑全球沿岸水生生态系统。澳大利亚热带北部的淡水湿地是该大陆生物多样性最为丰富、生产力最高的生态系统之一，但受该区域较高的海平面上升速率、低洼地势与强潮汐共同影响，其正日益遭受盐水入侵的威胁。储存在湿地沉积物中的繁殖体库（propagule bank）——包含水生初级生产者的种子与水生无脊椎动物的卵，对生态群落的建立乃至初级与次级生产力均至关重要。本实验研究了盐度升高对澳大利亚北部达尔文与卡卡杜国家公园之间区域热带淡水湿地沉积物岩芯中初级生产者和无脊椎动物萌发的影响。

2021年10月，研究人员对澳大利亚北领地3处沿海洪泛平原内的9处湿地开展了采样。每处湿地采集24个沉积物岩芯，采样点设于湿地剩余水体的周边区域，避开水体岸线。使用80 mm聚氯乙烯（PVC）管与抹刀采集岩芯，获取表层30 mm的沉积物。每根岩芯单独装入1 L塑料容器中，暂存于查尔斯·达尔文大学的室温环境下，完全干燥至少26天后再启动实验。所有湿地的岩芯均在25 ℃室温下储存，并置于12小时光照/12小时黑暗的全光谱双荧光灯循环环境中。将1 L容器随机分配至4个盐度微宇宙（microcosm）处理组：对照组/0 ppt（淡水）、5~10 ppt（约7 ppt）、15~20 ppt（约16 ppt）以及30~35 ppt（约35 ppt，海水），最终总样本量n=216。

# 数据来源：盐渍化对热带淡水湿地初级生产者和水生无脊椎动物的影响

数据集DOI: [10.5061/dryad.8931zcs1v](https://doi.org/10.5061/dryad.8931zcs1v)

## 数据与文件结构说明
本数据集包含3个文件，分别对应浮游动物（zooplankton）、大型水生植物（macrophytes）以及藻类（algae）的实验结果。该数据源自一项浸没盐度实验，实验使用来自3个沿海热带洪泛平原共9处湿地的沉积物岩芯，探究了湿季初期盐度升高对初级生产者和水生无脊椎动物萌发的影响。文件包含样本详情（包括处理组信息与湿地/集水区信息）以及三类生物类群的生物学数据。

### 文件与变量
#### 文件：Zooplankton_R_Data_Upload.xlsx
**描述：** 实验中采集的水生无脊椎动物结果。
##### 变量
* 湿地：沉积物岩芯采集所在湿地的名称……