This README.txt file was generated on 2020-10-19 by M. Trinidad Torres García

-------------------
GENERAL INFORMATION
-------------------

Title of Dataset:Torres-Garcia_et al_AJB2020

Author Information:
	M. Trinidad Torres García
	University of Almería - Andalusian Certer for the Monitoring and Assessment of global Change (CAESCG)
	Email address: m.t.torres@ual.es


Dates of data collection: May 2018 - September 2019

Geographic location of data collection: Cabo de Gata-Nijar Natural Park, Almería, Andalucia, Spain (36°49′20″N, 2°16′50″W)  

Data were collected in the framework of the European project LIFE Adaptamed (LIFE14349 CCA/ES/000612) and the LTSER Platform “The Arid Iberian South East LTSER Platform - Spain (LTER_EU_ES_027)"


--------------------------
SHARING/ACCESS INFORMATION
-------------------------- 

CITE: Torres-García et al. 2020. Squandering Water in Drylands: The Water Use Strategy of the Phreatophyte Ziziphus lotus in a Groundwater Dependent Ecosystem. American Journal of Botany.

Please do not use without prior permission


--------------------
DATA & FILE OVERVIEW
--------------------

File list:
	Gas_exchange_rates.csv
	Isotopes_d13C.csv
	Isotopes_d18O_d2H.csv
	Nutrients.csv
	Water potential.csv


STUDY ORGANISMS: 16 - 24 individuals for 1 species (Ziziphus lotus (L.) Lam.).


--------------------------
METHODOLOGICAL INFORMATION
--------------------------

Please see details in Torres-García et al. 2020. AJB.



------------------------------------------------------
DATA-SPECIFIC INFORMATION - < Gas_exchange_rates.csv >
------------------------------------------------------

Number of variables: 7

Number of cases/rows: 48

COVARIATES: Plant identification, ID; Month (May/July/Sept).

ENVIRONMENTAL VARIABLES & ASSOCIATED UNITS: Depth-to-groundwater, DTGW (m).

TRAIT LIST & ASSOCIATED UNITS: Photosynthetic rate, A (µmol CO m-2 s-1); Stomatal conductance, gs (mol H2O m-2 s-1), Transpiration rate, E (mmol H2O m-2 s-1); Vapor pressure deficit, VPD (KPa).

Observations: mean values per month and individual. 



------------------------------------------------------
DATA-SPECIFIC INFORMATION - < Isotopes_d13C.csv >
------------------------------------------------------

Number of variables: 3

Number of cases/rows: 15

ENVIRONMENTAL VARIABLES & ASSOCIATED UNITS: Depth-to-groundwater, DTGW (m).

TRAIT LIST & ASSOCIATED UNITS: Carbon stable isotope, d13C (per mil.); Carbon isotope discrimination, DELTA (per mil.).

Observations: mean values per individual; standard deviation of carbon stable isotope included (SD_C). 



------------------------------------------------------
DATA-SPECIFIC INFORMATION - < Isotopes_d18O_d2H.csv >
------------------------------------------------------

Number of variables: 5

Number of cases/rows: 97

COVARIATES: Source (xylem/groundwater/precipitation); Month of sampling; Plant identification, ID.

TRAIT LIST & ASSOCIATED UNITS: Oxygen stable isotope, d18O (per mil.); Hydrogen stable isotope, d2H (per mil.).

Observations: standard deviation of oxygen (SD_O) and hydrogen (SD_H) stable isotopes included.



------------------------------------------------------
DATA-SPECIFIC INFORMATION - < Isotopes_d13C.csv >
------------------------------------------------------

Number of variables: 3

Number of cases/rows: 15

ENVIRONMENTAL VARIABLES & ASSOCIATED UNITS: Depth-to-groundwater, DTGW (m).

TRAIT LIST & ASSOCIATED UNITS: Carbon stable isotope, d13C (per mil.); Carbon isotope discrimination, DELTA (per mil.).

Observations: mean values per individual; standard deviation of carbon stable isotope included (SD_C). 



------------------------------------------------------
DATA-SPECIFIC INFORMATION - < Nutrients.csv >
------------------------------------------------------

Number of variables: 12

Number of cases/rows: 16

COVARIATES: Plant identification, ID.

ENVIRONMENTAL VARIABLES & ASSOCIATED UNITS: Depth-to-groundwater, DTGW (m).

TRAIT LIST & ASSOCIATED UNITS: Calcium, Ca (g/100g); Copper, Cu (mg/Kg); Iron, Fe (mg/Kg); Potassium, K (g/100g); Magnesium, Mg (g/100g); Sodium, Na (g/100g); Nitrogen, N (g/100g); Phosphorus, P (g/100g); Sulphur, S (g/100g); Zinc, Zn (mg/Kg).



------------------------------------------------------
DATA-SPECIFIC INFORMATION - < Water_potential.csv >
------------------------------------------------------

Number of variables: 6

Number of cases/rows: 120

COVARIATES: Plant identification, ID; Month (May/July/Sept); Year (2018/2019).

ENVIRONMENTAL VARIABLES & ASSOCIATED UNITS: Depth-to-groundwater, DTGW (m).

TRAIT LIST & ASSOCIATED UNITS: Predawn water potential, PD (MPa); Midday water potential, MD (MPa).