﻿This data-pojo-readme.txt file was generated on 2026-03-24 by Roel Lammerant


DATA-SPECIFIC INFORMATION FOR: data-pojo.csv

## Data collected by Roel Lammerant, Jenna Hölttä, Janina Pykäri, Nishant Nishant, Anna Villnäs, Sofia Wikström, Alf Norkko & Camilla Gustafsson, August 2023.
## Correspondence concerning these data should be directed to Roel Lammerant (Roel.lammerant@outlook.be).

## Description: 
Spatial field survey in August 2023, where macrophyte material was destructively harvested at 20 sites along a salinity and exposure gradient in the Pojo-Hanko archipelago, Finland.  
Data were collected through the use of high precision scales, a flatbed scanner, WinRHIZO and imageJ (Rueden et al. 2017)

Data file:

1. Number of variables: 

41

2. Number of cases/rows: 

 131

3. Variable List: 
<list variable name(s), description(s), unit(s)and value labels as appropriate for each>

# site - The site code from where macrophyte material was destructively harvested made up out of depth, site number and quadrat number
# number - Number of the sites, ranges from 1-5
# depth - Depth category, D (i.e. deep) and S (i.e. shallow)
# species - Six letter code of the species. MYRSPI - Myriophyllum spicatum, CERDEM - Ceratophyllum demersum, POTPER - Potamogeton perfoliatus, RANBAU - Ranunculus baudotii, RANCIR - Ranunculus circinatus, RUPCIR - Ruppia cirrhosa, STUPEC - Stuckenia pectinata, ZANMAJ - Zannichellia major, ZOSMAR - Zostera Marina, NAJMAR - Najas marina, LEMTRI - Lemna trisulca, MYRSIB - Myriophyllum sibiricum, CALHER - Callitriche hermafroditica, POTNIT - Potamogeton nitens, NUPLUT - Nuphar lutea, Fontinalis - Fontinalis sp., POTOBT - Potamogeton obtusifolius, Sparganium - Sparganium sp.  
# height - Maximum height in cm
# count - The numbers of individuals present in the destructively harvested plant material
# LA_1 - Leaf area 1 in cm^2
# LP_1 - Leaf perimeter 1 in cm
# LA_2 - Leaf area 2 in cm^2
# LP_2 -Leaf perimeter 2 in cm
# leaf_dwt_1 - Dry mass weight of leaf 1 used for trait measurements in mg
# leaf_dwt_2 - Dry mass weight of leaf 2 used for trait measurements in mg
# leaf_dwt_epp - Dry mass weight of the leaves used for elemental analysis in mg
# stem_volume - Stem volume in cm^3
# stem_dwt - Drymass weight of stem tissue used for trait measurements in mg
# rhi_lenght - Rhizome length in cm
# rhi_dwt_trait - Drymass weight of rhizome tissue used for trait measurements in mg
# rhi_dwt - Drymass weight of rhizome tissue in the collected quadrat, which was not used for trait measurements in mg
# rhi_dwt_epp - Dry mass weight of the rhizome used for elemental analysis in mg
# root_depth - Maximum rooting depth in cm
# root_dwt - Drymass weight of root tissue in the collected quadrat, which was not used for elemental measurements in mg
# root_dwt_epp - Drymass weight of root tissue used for elemental measurements in mg
# above_dwt - Drymass weight of aboveground tissue in the collected quadrat, which was not used for trait measurements in mg
# detritus_dwt - Drymass weight of detritus present in the collected quadrat in mg
# detritus_algae - Drymass weight of detritus interspersed with Algae present in the collected quadrat in mg
# green_algae - Drymass weight of Green Algae present in the collected quadrat in mg
# chara_sp - Drymass weight of Chara sp. (Algae) present in the collected quadrat in mg
# aeglin - Drymass weight of Aegagropila linnaei (Algae) present in the collected quadrat in mg
# vaucheria_sp - Drymass weight of Vaucheria (Algae) present in the collected quadrat in mg
# notes - Notes for the collected samples

# above_dwt_all - Dry mass weight of all aboveground biomass present in the quadrat in mg
# below_dwt_all - Dry mass weight of all belowground biomass present in the quadrat in mg
# rhi_dwt_all - Dry mass weight of all rhizome biomass present in the quadrat in mg
# root_dwt_all - Dry mass weight of all root biomass present in the quadrat in mg
# dwt_all - Dry mass weight of all biomass present in the quadrat in mg
# algae_dwt_all - Dry mass weight of all algae biomass present in the quadrat in mg
# SLA_1 - The ratio of leaf area 1 to dry mass of the leaf in cm^2/mg
# SLA_2 - The ratio of leaf area 2 to dry mass of the leaf in cm^2/mg
# LAP_1 - The ratio of leaf area to perimeter of leaf 1 in %
# LAP_2 - The ratio of leaf area to perimeter of leaf 2 in %
# SRhil - The ratio of rhizome length to dry mass of the root rhizome in cm/mg

4. Missing data codes: 
NA

5. Specialized formats or other abbreviations used: 
