Edaphic effects on forest structure and tree species composition in three seasonally dry tropical forest types in Cambodia
Data files
Nov 21, 2025 version files 144.54 KB
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README.md
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ResourceDataRev2JournalUpload.xlsx
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Abstract
There are datasets of tree census and soil conditions from three adjacent 1-ha plots in deciduous, semi-evergreen, and evergreen forests in seasonally dry tropical forests (SDTFs). Using these datasets, we evaluated edaphic effects on forest structure and tree species composition in Cambodia’s unique lowland forest landscape, where different forest types coexist under similar climatic conditions. Soil nutrients and water content were measured at 0–200-cm depth in both the rainy and dry seasons, alongside soil texture.
This is the dataset of tree census and soils obtained in deciduous, semi-evergreen, and evergreen forests in Khun Ream, Siem Reap, Cambodia, in 2021.
In each forest type, 1-ha plot (100m × 100m) was established, and trees with more than 5-cm in DBH were numbered and measured.
Soils were sampled in each plot during both the rainy (October 2022) and dry (February 2023) seasons. Samples were collected every 20 cm from 0 to 200 cm, including a 10-cm depth (11 samples per point), at 8 points per plot.
Description of the data and file structure
File: ResourceDataRev2JournalUpload.xlsx
Tree census dataset in each forest type includes the following data.
- Subplot (10m × 10m): each plot is divided into 100 subplots.
- Block: each plot has 8 blocks and the area of each block is 800 m2. Some subplots are not included in any blocks.
- TreeID: TreeID of each stem
- DBH in 2021 (cm): diameter at breast height (DBH) that was measured in October 2021.
- Family: family name
- Species: species name
- Soil dataset includes the following data.
- Forest_Type: forest type including deciduous, semi-evergreen, and evergreen forests.
- Point: soil sampling point which was located at the center of each block.
- RN_S: nitrogen content in surface (0‒40 cm) layer in the rainy season (%).
- RN_M: nitrogen content in middle (40‒100 cm) layer in the rainy season (%).
- RN_D: nitrogen content in deep (100‒200 cm) layer in the rainy season (%).
- DN_S: nitrogen content in surface (0‒40 cm) layer in the dry season (%).
- DN_M: nitrogen content in middle (40‒100 cm) layer in the dry season (%).
- DN_D: nitrogen content in middle (40‒100 cm) layer in the dry season (%).
- RP_S: available phosphorous content in surface (0‒40 cm) layer in the rainy season (mg 100 g‒1).
- RP_M: available phosphorous content in middle (40‒100 cm) layer in the rainy season (mg 100 g‒1).
- RP_D: available phosphorous content in deep (100‒200 cm) layer in the rainy season (mg 100 g‒1).
- DP_S: available phosphorous content in surface (0‒40 cm) layer in the dry season (mg 100 g‒1).
- DP_M: available phosphorous content in middle (40‒100 cm) layer in the dry season (mg 100 g‒1).
- DP_D: available phosphorous content in deep (100‒200 cm) layer in the dry season (mg 100 g -1).
- RW_S: water content in surface (0‒40 cm) layer in the rainy season (g g -1).
- RW_M: water content in middle (40‒100 cm) layer in the rainy season (g g -1).
- RW_D: water content in deep (100‒200 cm) layer in the rainy season (g g -1).
- DW_S: water content in surface (0‒40 cm) layer in the dry season (g g -1).
- DW_M: water content in middle (40‒100 cm) layer in the dry season (g g -1).
- DW_D: water content in deep (100‒200 cm) layer in the dry season (g g -1).
- Clay_S: clay content in surface (0‒40 cm) layer (%).
- Clay_M: clay content in middle (40‒100 cm) layer (%).
- Clay_D: clay content in deep (100‒200 cm) layer (%).
- Sand_S: sand content in surface (0‒40 cm) layer (%).
- Sand_M: sand content in middle (40‒100 cm) layer (%).
- Sand_D: sand content in deep (100‒200 cm) layer (%).
NA: data is not available.