Divergence of vessel diameter explains interspecific variation in hydraulic safety to salinity in the Sundarbans mangrove ecosystem

Sundarbans (~10000 sq km), the world’s largest single-block mangrove ecosystem, provides important ecosystem goods and services to > 7.5 million coastal people in two neighboring countries, Bangladesh (~60%) and India (~40%). It has extensive variability in environmental variables, including siltation and salinity, which are influenced by freshwater damming in the north and changing seawater levels from the south. Based on spatial salinity gradients, this ecosystem is divided into three contrasting salinity zones: the low salinity zone (LSZ, eastern and northeastern part), the medium salinity zone (MSZ, central and southern part), and the high salinity zone (HSZ, western and southwestern part). Forest growth, such as tree height, increases from the HSZ to the LSZ and varies between salinity zones. However, human disruptions and rapid environmental changes, such as sea level rise (SLR), pose a threat to this sensitive ecosystem. Increasing salinity creates challenges for hydraulic tra..., Sampling was done in the three salinity zones (LSZ, MSZ and HSZ) of the Bangladesh Sundarbans (21°30′ – 22°30′ N, 89° 00′ – 89°55′ E). Total 218 wood cores were collected (at a height of 1.3 m from the ground) from three widely distributed species, such as Exocecaria agallocha (105), Xylocarpus moluccensis (47) and Heritiera fomes (66). The DBH (cm) and tree height (m) were measured using a diameter tape and a Suunto clinometer (Suunto, Vantaa, Finland), respectively. Afterwards, the wood cores were placed in polythene bags separately for laboratory analyses.
We used the outer part of the wood core (near bark) from each tree for microtomy to minimize the age effect. Wood sections of 15 μm in thickness were cut using a sliding microtome (Microm, Fisher Scientific, Walldorf, Germany). Afterwards, the sections were stained in a solution of 0.1% safranin (Merck KGaA, Darmstadt, Germany) and 50% ethanol. The sections were subsequently washed for 5 minutes in 50, 75, 96, and 100% ethanol serie..., , This README file was generated on 2025-01-08 by MD. Imam Hossain Imran.

GENERAL INFORMATION

1. Title of Dataset: Data from: Divergence of vessel diameter explains interspecific variation in hydraulic safety to salinity in the Sundarbans mangrove ecosystem.
2. Author Information
A. Principal Investigator Contact Information
Name: Md. Qumruzzaman Chowdhury
Institution: Shahjalal University of Science and Technology
Address: Sylhet, Bangladesh
Email: [[e-mail]](mailto:[e-mail])
3. Date of data collection (single date, range, approximate date): 2021
4. Geographic location of data collection: Sundarban Mangrove Forest, Bangladesh

SHARING/ACCESS INFORMATION

1. Links to publicly accessible locations of the data: None
2. Links/relationships to ancillary data sets: None
3. Was data derived from another source? No
A. If yes, list source(s): NA

DATA & FILE OVERVIEW

1. File List:

A) Tree_Traits.csv
B) Regulatory_Resources_Variables.csv
C) Xylem_Tra...

孙德尔本斯（Sundarbans）占地约10000平方公里，是全球最大的连片红树林生态系统，为毗邻的孟加拉国（约占60%）与印度（约占40%）两国超过750万沿海居民提供了重要的生态产品与服务。该生态系统的环境变量存在广泛变异，包括淤积与盐度，其变化受北部淡水筑坝活动与南部海平面波动共同影响。基于空间盐度梯度，该生态系统被划分为三个盐度特征迥异的分区：低盐度区（LSZ，东部与东北部区域）、中盐度区（MSZ，中部与南部区域）以及高盐度区（HSZ，西部与西南部区域）。林木生长指标（如树高）从高盐度区向低盐度区逐渐升高，且在不同盐度分区间存在显著差异。然而人类活动干扰与快速环境变化——例如海平面上升（SLR）——正对这一敏感生态系统构成威胁。盐度升高给水分运输相关研究带来了挑战[原文此处截断]。

采样工作在孟加拉国孙德尔本斯的三个盐度分区（LSZ、MSZ与HSZ）内开展，采样区域地理坐标为北纬21°30′至22°30′、东经89°00′至89°55′。研究共从3种广泛分布的树种中采集了218个木芯（采样高度为地面以上1.3米），分别为海漆（Exocecaria agallocha，105个）、木果楝（Xylocarpus moluccensis，47个）以及银叶树（Heritiera fomes，66个）。分别使用直径卷尺与芬兰万塔松拓公司（Suunto, Vantaa, Finland）生产的Suunto测高仪测量了胸径（DBH，单位：厘米）与树高（单位：米）。随后将每个木芯单独装入聚乙烯袋中，以待实验室分析。

为尽可能降低树龄效应的影响，我们选取每棵树木芯靠近树皮的外侧部分进行切片制作。使用德国瓦尔德道夫费希尔科学公司（Fisher Scientific, Walldorf, Germany）生产的Microm滑动式切片机制作厚度为15微米的木材切片。随后将切片置于0.1%番红（Merck KGaA，德国达姆施塔特）与50%乙醇的混合染液中进行染色。随后将切片依次在50%、75%、96%与100%乙醇溶液中各清洗5分钟[原文此处截断]。

本README文件由MD. Imam Hossain Imran于2025年1月8日生成。

### 基本信息
1. 数据集标题：相关数据源自《导管直径差异解释孙德尔本斯红树林生态系统中物种间盐分胁迫下水分运输安全性的变异》
2. 作者信息
A. 项目负责人联系方式
姓名：Md. Qumruzzaman Chowdhury
所属机构：谢赫·贾拉尔理工大学（Shahjalal University of Science and Technology）
地址：孟加拉国锡尔赫特
邮箱：[e-mail]
3. 数据采集日期：2021年
4. 数据采集地理区域：孟加拉国孙德尔本斯红树林

### 共享与获取信息
1. 公开数据获取链接：无
2. 辅助数据集关联链接：无
3. 数据是否源自其他来源？否
A. 若是，请列出来源：无

### 数据与文件概览
1. 文件列表：
A) Tree_Traits.csv（树木性状表）
B) Regulatory_Resources_Variables.csv（调控资源变量表）
C) Xylem_Tra...（木质部性状相关文件[原文此处截断]）