Sap flux density in 10 stems of a mature beech forest in the northeastern lowlands of Germany

Open Research Data Portal
DOI for Scientific and Technical Data
10.4228/ZALF.2005.312
Title
Sap flux density in 10 stems of a mature beech forest in the northeastern lowlands of Germany
Citation
Lüttschwager, Dietmar; Jochheim, Hubert (2016): Sap flux density in 10 stems of a mature beech forest in the northeastern lowlands of Germany , Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.[doi: 10.4228/ZALF.2005.312]
Publisher
Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.
Dates
Collected:2002-01-01/2005-12-31
Contributor(s)
HostingInstitution: Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V., Müncheberg (Germany)
DataCollector: Institut für Landschaftsbiogeochemie (LBG), Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.
DataCollector: Institut für Landschaftssystemanalyse (LSA), Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.
DataCollector: Landeskompetenzzentrum Forst Eberswalde (LFE)
ContactPerson: Lüttschwager, Dietmar
RegistrationAgency: DataCite
Creator(s)
Lüttschwager, Dietmar
Jochheim, Hubert
Subject(s)
AGROVOC:
Fagus sylvatica
Forestry
Sap
Weather

GEMET:
Weather
Forestry
Description
Sap flux density was measured in 10 stems of a mature beech forest (Fagus sylvatica L.) in the northeastern lowlands of Germany during vegetation periods of years 2002 to 2005. The site represents an intensive monitoring core plot (DE1207) of the ICP Forests level II program (http://icp-forests.net/). The stand was growing on groundwater-distant, weakly degraded soil (Dystric Arenosol; FAO classification 1974). The humus type is moder. It was established in 1888 as a plantation under Scots pine (Pinus sylvestris L.) trees. Investigated trunks are described by stem diameter at breast height and tree height. Sap flow density of several depths of the trunks and data of the air temperature, air humidiy, global radiation, wind speed, and precipitation are given as hourly values. Xylem sap flux measurements performed to trees and tree stands allow differentiation of transpiration by different vegetation layers. The total transpiration of the canopy corresponds to the water flow through the trunk. Scaling from the sap flow measurement to stand transpiration is a two-step-procedure: firstly from sensor to tree and secondly from tree to stand. For the first step a radial profile of sap flow density is used. For scaling from tree to stand the structural inhomogeneity of the stand must be considered. The importance of this point is in even aged stands constricted, however, measurements should incorporate the differences of basal area and crown projected area of the trees.
Language
English
Related Datasets
IsDocumentedBy: 10.1051/forest:2007020
IsDocumentedBy: 10.1007/s10342-004-0015-9
Location
Stechlin
Data Format
xls and csv
Type of Resource
Dataset: Table
Rights
Creative Commons BY 4.0
Parameters
(parameter; compartment; instrument; method)
Air temperature(°C); out > 1km; Meteorological sensors; hourly value from 1-24 hours
Precipitation(mm); out > 1km; Meteorological sensors; hourly value from 1-24 hours
Relative humidity(%); out > 1km; Meteorological sensors; hourly value from 1-24 hours
Wind velocity(m/s); out > 1km; Meteorological sensors; hourly value from 1-24 hours
Incoming photosynthetic photon flux density(µmol/m² s); out > 1km; Meteorological sensors; hourly value from 1-24 hours
Global radiation(W/m²); out > 1km; Meteorological sensors; hourly value from 1-24 hours
Sap flux density(dm3 dm-2 h-1); 10 trees, 3 radial depths in the stem; Sap flux measuring system ; Thermal dissipation probes according to Granier (1985) and calculation
Structure of Data Table(s)

Table: DEU_STE_2+3_SAPFLOW_HD

Column name Parameter Unit Description
​TIMESTAMP ​timestamp format: DD.MM.YYYY HH:MM:SS
​DEU_STE_2+3_FSy_Js_1 sap flux density (per unit sapwood area)  dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 48a, diameter of the tree at breast height: 58,4cm and tree Height: 32,6m
DEU_STE_2+3_FSy_Js_2 sap flux density (per unit sapwood area)  dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 48b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 58,4cm and tree Height: 32,6m
DEU_STE_2+3_FSy_Js_3 sap flux density (per unit sapwood area)  dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 57, diameter of the tree at breast height: 39,3cm and tree Height: 31m
DEU_STE_2+3_FSy_Js_4 sap flux density (per unit sapwood area)  dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 48c, with treatment (radial depth 44-66mm), diameter of the tree at breast height: 58,4cm and tree Height: 32,6m
DEU_STE_2+3_FSy_Js_5 sap flux density (per unit sapwood area)  dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 55a, diameter of the tree at breast height: 55,2cm and tree Height: 31,4m
DEU_STE_2+3_FSy_Js_6 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 55b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 55,2cm and tree Height: 31,4m
DEU_STE_2+3_FSy_Js_7 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 63, diameter of the tree at breast height: 52,1cm and tree Height: 32m
DEU_STE_2+3_FSy_Js_8 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 56, diameter of the tree at breast height: 48,6cm and tree Height: 32,1m
DEU_STE_2+3_FSy_Js_9 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 65a, diameter of the tree at breast height: 45cm and tree Height: 31,6m
DEU_STE_2+3_FSy_Js_10 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 65b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 45cm and tree Height: 31,6m
DEU_STE_2+3_FSy_Js_11 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 75, diameter of the tree at breast height: 43,9cm and tree Height: 29,4m
DEU_STE_2+3_FSy_Js_12 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 52a, diameter of the tree at breast height: 35,5cm and tree Height: 29,1m
DEU_STE_2+3_FSy_Js_13sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 52b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 35,5cm and tree Height: 29,1m
DEU_STE_2+3_FSy_Js_14 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 50, diameter of the tree at breast height: 32,5cm and tree Height: 27,6m
DEU_STE_2+3_FSy_Js_15 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 54a, diameter of the tree at breast height: 24,1cm and tree Height: 24,3m
DEU_STE_2+3_FSy_Js_16 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 54b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 24,1cm and tree Height: 24,3m

 

Table: DEU_STE_4+5_SAPFLOW_HD

Column name Parameter Unit Description
TIMESTAMP   timestamp format: DD.MM.YYYY HH:MM:SS
DEU_STE_4+5_FSy_Js_1 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 82a, diameter of the tree at breast height: 37,4cm and tree Height: 30,5m
DEU_STE_4+5_FSy_Js_2 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 82b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 37,4cm and tree Height: 30,5m
DEU_STE_4+5_FSy_Js_3 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 92a, diameter of the tree at breast height: 43,9cm and tree Height: 30m
DEU_STE_4+5_FSy_Js_4 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 92b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 43,9cm and tree Height: 30m
DEU_STE_4+5_FSy_Js_5 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 91a, diameter of the tree at breast height: 60,2cm and tree Height: 34m
DEU_STE_4+5_FSy_Js_6 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 91b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 60,2cm and tree Height: 34m
DEU_STE_4+5_FSy_Js_7 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 92c, with treatment (radial depth 44-66mm), diameter of the tree at breast height: 60,2cm and tree Height: 34m
DEU_STE_4+5_FSy_Js_8 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 80, diameter of the tree at breast height: 46,5cm and tree Height: 30,5m
DEU_STE_4+5_FSy_Js_9 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 93a, diameter of the tree at breast height: 56,3cm and tree Height: 33,8m
DEU_STE_4+5_FSy_Js_10 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 93b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 56,3cm and tree Height: 33,8m
DEU_STE_4+5_FSy_Js_11 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 73a, diameter of the tree at breast height: 49,3cm and tree Height: 30,8m
DEU_STE_4+5_FSy_Js_12 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 73b, with treatment (radial depth 22-44mm), diameter of the tree at breast height: 49,3cm and tree Height: 30,8m
DEU_STE_4+5_FSy_Js_13 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 68, diameter of the tree at breast height: 34,8cm and tree Height: 32,5m
DEU_STE_4+5_FSy_Js_14 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 99, diameter of the tree at breast height: 52,5cm and tree Height: 33,5m
DEU_STE_4+5_FSy_Js_15 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 100, diameter of the tree at breast height: 18,8cm and tree Height: 22m
DEU_STE_4+5_FSy_Js_16 sap flux density (per unit sapwood area) dm3 dm-2 h-1 Internal code: Germany, Stechlin, Measurement of  xylem flux density at the beech (Fagus sylvatica), tree 101, diameter of the tree at breast height: 41,7cm and tree Height: 31m

 

Table: ENVIRONMENTAL_HD

Column name Parameter Unit Description
TIMESTAMP   timestamp format: DD.MM.YYYY HH:MM:SS
TA Air temperature °C  Air temperature, Meteorological sensors located in nearby station (> 1 km)
RH Air relative humidity % Air relative humidity, Meteorological sensors located in nearby station (> 1 km)
PPFD_IN Incoming photosynthetic photon flux density µmol/(m²s) Incoming photosynthetic photon flux density, Meteorological sensors located in nearby station (> 1 km)
GLOBRADGlobal radiation W/m²Global radiation, Meteorological sensors located in nearby station (> 1 km)
WS Wind speed  m/s Wind speed, Meteorological sensors located in nearby station (> 1 km)
PRECIP Precipitation  mm Precipitation, Meteorological sensors located in nearby station (> 1 km)
Additional Information for Dataset
​Sap flow density was measured using constant power thermal dissipation probes according to Granier (DOI:10.1051/forest:19850204). The measurements were made at a depth of 0-22 mm for 10 trees; at 22-44 mm on 5 trees of them and at 44-66 mm for one very large tree. The measured values (mV between thermocouples connected in series in the heated and unheated sensors) were recorded at 10 s intervals and stored as 60 min mean values. Sap flow density was calculated using the function relating to thermal dissipation.
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