Citation:

PANGAEA.971807 (DOI registration in progress)

Name: Light adaptation patterns in non-native Vaucheria-turfs (Xanthophyceae) on a tidal sedimentary coast - pigment data
Creator: Ronny Steinberg
Published: 2025-04-04
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Light curves; non-native species; tidal flats; Vaucheria sp.; Xanthophyceae

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Published: 2025-04-04

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Abstract:

In this study, measurements of the light curve were taken to assess photosynthetic competence in Vaucheria algae. The Chl a fluorescence of photosystem II (PSII) was measured using a pulse amplitude modulated fluorometer. The maximum quantum yield (Fv/Fm) and electron transport rates (ETR) were determined in dark-adapted samples. The light curves were measured by varying the light intensity in 10 steps and recording the effective quantum yield. The data were then analysed using a model known as the photosynthetic light response curve, which describes the relationship between ETR and light intensity. The model assumes that ETR increases linearly with light intensity at low levels, but then slows down and approaches a maximum value (ETRmax) at higher light intensities. The half-saturation constant (k) represents the light intensity at which the ETR is half its maximum. These parameters, ETRmax and k, play a crucial role in understanding the photosynthetic properties of algae under different light conditions. The data were analysed using nonlinear least squares estimates of the parameters in R Studio.

Keyword(s):

Light curves; non-native species; tidal flats; Vaucheria sp.; Xanthophyceae

Related to:

Steinberg, Ronny (2025): Light adaptation patterns in non-native Vaucheria-turfs (Xanthophyceae) on a tidal sedimentary coast - light curve data [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979243

Coverage:

Median Latitude: 54.992865 * Median Longitude: 8.408960 * South-bound Latitude: 54.957830 * West-bound Longitude: 8.381070 * North-bound Latitude: 55.027900 * East-bound Longitude: 8.436850

Date/Time Start: 2022-07-13T00:00:00 * Date/Time End: 2022-11-16T00:00:00

Event(s):

Kampen_pigm_july * Latitude: 54.957830 * Longitude: 8.381070 * Date/Time: 2022-07-25T00:00:00 * Location: Blidselbucht, Kampen, Sylt, Germany * Method/Device: Sampling by hand (HAND)

Kampen_pigm_november * Latitude: 54.957830 * Longitude: 8.381070 * Date/Time: 2022-11-16T00:00:00 * Location: Blidselbucht, Kampen, Sylt, Germany * Method/Device: Sampling by hand (HAND)

Kampen_pigm_september * Latitude: 54.957830 * Longitude: 8.381070 * Date/Time: 2022-09-14T00:00:00 * Location: Blidselbucht, Kampen, Sylt, Germany * Method/Device: Sampling by hand (HAND)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Steinberg, Ronny
2	Sampling date/time, experiment	Date/time sampling exp		Steinberg, Ronny
3	LATITUDE	Latitude		Steinberg, Ronny		Geocode – of sampling event
4	LONGITUDE	Longitude		Steinberg, Ronny		Geocode – of sampling event
5	Type of study	Study type		Steinberg, Ronny
6	Date/time analysis, experiment	Date/time analysis exp		Steinberg, Ronny
7	Species	Species		Steinberg, Ronny	Visual identification (VID)	cf. Velutina
8	Species, unique identification (Semantic URI)	Species UID (Semantic URI)		Steinberg, Ronny	Visual identification (VID)	cf. Velutina
9	Species, unique identification (URI)	Species UID (URI)		Steinberg, Ronny	Visual identification (VID)	cf. Velutina
10	Sample ID	Sample ID		Steinberg, Ronny
11	Biomass, dry mass	Biom dm	g	Steinberg, Ronny	Scale, Sartorius, Entris 2241-1s
12	Chlorophyll a	Chl a	µg/mg	Steinberg, Ronny
13	Chlorophyll c2	Chl c2	µg/mg	Steinberg, Ronny
14	Diadinoxanthin	Diadinoxanthin	µg/mg	Steinberg, Ronny
15	Diatoxanthin	Diatoxanthin	µg/mg	Steinberg, Ronny
16	beta-Carotene	b-Car	µg/mg	Steinberg, Ronny
17	Fucoxanthin	Fuco	µg/mg	Steinberg, Ronny
18	Violaxanthin	Violaxanthin	µg/mg	Steinberg, Ronny
19	Chlorophyll b	Chl b	µg/mg	Steinberg, Ronny

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

450 data points

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