﻿This C_N_Seasonal_Readme.txt file was generated on 2025-02-24 by Roel Lammerant



DATA-SPECIFIC INFORMATION FOR: C_N_Seasonal.xlsx

## Data processed by Roel Lammerant, Tvärminne Zoological Station, Finland - in collaboration with Eva Karin Rohlfer, Alf Norkko & Camilla Gustafsson.
## Correspondence concerning these data should be directed to Roel Lammerant (Roel.lammerant@outlook.be).

## Description: 
Seasonal field survey, based on four sampling campaigns (October 2021, March 2022, June 2022 and August 2022) of destructively harvesting macrophyte material in the Tvärminne archipelago, Finland.  
Elemental analyses were conducted on all species found within the quadrats and on different tissue compartments for all four surveys.
Dried tissue was homogenized using  sterile stainless-steel beads and a ball mill (Retsch MM 400). Samples were micro-weighed by hand and nalyzed using a Sercon Isotope Ratio Mass Spectrometer at Tvärminne Zoological Staion.

Data file:

1. Number of variables: 
12

2. Number of cases/rows: 
1143

3. Variable List: 
<list variable name(s), description(s), unit(s)and value labels as appropriate for each>
# Site - The site and quadrat number from where macrophyte material was destructively harvested
# Species - Six letter code of the species. Codes are as follows: FUCUS - Fucus vesiculosus, 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 - Zoster Marina 
# Tissue - Tissue used for elemental analyses (young/old Fucus vesiculosus, rhizome, root, leaf)
# Weight (mg) - Weight of the sample used for elemental analyses in mg
# Position - Position in the well plate 
# PON (µg) - Amount of particulate organic nitrogen in µg
# δ15N - Nitrogen stable isotope measurement
# POC (µg) - Amount of particulate organic carbon in µg
# δ13C - Carbon stable isotope measurement
# PON (µg/mg) - The amount of particulate organic nitrogen per dry weight of the sampled tissue in µg/mg
# POC (µg/mg) - The amount of particulate organic carbon per dry weight of the sampled tissue in µg/mg
# Time - Timing of the data collection 

4. Missing data codes: 
<list code/symbol and definition>n

5. Specialized formats or other abbreviations used: 
