Citation:

PANGAEA.988300

Name: Gas exchange data from Douglas fir juveniles during experimental drought and recovery
Published: 2025-12-22
License: https://creativecommons.org/licenses/by/4.0/
Keywords: gas exchange; Laboratory experiment; Pseudotsuga menziesii (Mirb.) Franco

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Published: 2025-12-22 • DOI registered: 2026-01-20

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Abstract:

This dataset contains physiological measurements from a controlled laboratory experiment on juvenile Pseudotsuga menziesii (Douglas fir) conducted between June and August 2023 at the experimental greenhouse facility of the Karlsruhe Institute of Technology (KIT), Campus Alpin, Garmisch-Partenkirchen, southern Germany. The plant material originated from a commercial nursery in Franconia, Germany, and consisted of three-year-old trees maintained under uniform conditions prior to the experiment.

The experiment aimed to assess the physiological responses of P. menziesii to progressive drought and subsequent recovery under controlled environmental conditions. Two drought treatments (mild and severe) were applied over a four-week period, followed by a re-watering phase. Air and soil temperature, relative humidity, vapor pressure deficit, molar flow, transpiration rate, net photosynthesis, conductance to water, and CO₂ exchange were recorded continuously using automated LI-COR gas exchange systems with separate branch (aboveground) and root (belowground) chambers.

Each measurement is associated with a unique tree identifier, treatment level, and compartment. All timestamps are reported in Coordinated Universal Time (UTC). The dataset provides detailed observations suitable for examining drought stress responses and recovery dynamics in juvenile Pseudotsuga menziesii under controlled laboratory conditions.

Keyword(s):

gas exchange; Laboratory experiment; Pseudotsuga menziesii (Mirb.) Franco

Related to:

Alongi, Franklin; Knüver, Timo; McAdam, Scott; Ziegler, Yanick; Gast, Andreas; Ruehr, Nadine K (2025): Drought-induced delays in stem hydraulic development shape gas exchange and growth recovery in Douglas fir. Plant Physiology, kiaf654, https://doi.org/10.1093/plphys/kiaf654

Funding:

Helmholtz-Fonds e.V., grant/award no. W2/W3-156

NSF National Center for Atmospheric Research (NSF), grant/award no. IOS-2140119

Coverage:

Latitude: 47.476400 * Longitude: 11.062778

Date/Time Start: 2023-06-07T06:00:00 * Date/Time End: 2023-08-06T23:59:40

Minimum Elevation: 719.0 m * Maximum Elevation: 719.0 m

Event(s):

Garmisch-Partenkirchen_KIT * Latitude Start: 47.476400 * Longitude Start: 11.062778 * Latitude End: 47.476400 * Longitude End: 11.062778 * Date/Time Start: 2023-06-07T06:00:00 * Date/Time End: 2023-07-04T16:34:50 * Elevation Start: 719.0 m * Elevation End: 719.0 m * Location: Germany * Method/Device: Experiment (EXP)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Tree, status	Tree status		Alongi, Franklin
2	Type of study	Study type		Alongi, Franklin
3	Species, unique identification	Species UID		Alongi, Franklin
4	Species, unique identification (Semantic URI)	Species UID (Semantic URI)		Alongi, Franklin
5	Species, unique identification (URI)	Species UID (URI)		Alongi, Franklin
6	Identification	ID		Alongi, Franklin
7	DATE/TIME	Date/Time		Alongi, Franklin		Geocode
8	Treatment	Treat		Alongi, Franklin		Either control, mild, or severe treatment
9	Compartment	Compartment		Alongi, Franklin		Either aboveground (branch) or belowground (root)
10	Pseudotsuga menziesii, leaf area	P. menziesii LA	m²	Alongi, Franklin
11	Temperature, air (branch) and soil (root)	T air + soil	°C	Alongi, Franklin	Temperature probe (TP)
12	Flow rate, molar	Flow rate molar	mol/s	Alongi, Franklin	Calculated
13	Net carbon dioxide	Net CO2	g/min	Alongi, Franklin	Gas Analyzer, LICOR, LI-7000
14	Transpiration, flux per leaf area	Transp flux per area	mmol/s/m²	Alongi, Franklin
15	Photosynthetic flux, per leaf area	Photosynth flux per area	µmol/s/m²	Alongi, Franklin
16	Conductance to water	gs	mmol/s/m²	Alongi, Franklin
17	Humidity, relative	RH	%	Alongi, Franklin	Hygrometer (HYGRO)
18	Vapour pressure deficit	VPD	kPa	Alongi, Franklin	Calculated	Derived from Temperature and RH

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

3743995 data points

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