Citation:

PANGAEA.961147

Name: Elemental composition and residual water content of seven thaliacean (salps and pyrosomes) species from the world's oceans
Published: 2024-04-18
License: https://creativecommons.org/licenses/by/4.0/
Keywords: pyrosome; Salpa; stoichiometry; thaliaceans; water of hydration

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Abstract:

Ecosystem models often use wet weights to parameterise biota disregarding their water content. This may be especially erroneous for gelatinous plankton, such as salps and pyrosomes, with high, compared to crustaceans, water content. Poorly quantified residual water should also be corrected when using dry weights for parameterisation. We estimated the residual water content (as well as elemental and organic contents) for seven tunicate species, one pyrosome and six salps (N = 107). Specimens were collected during several research expeditions in the Southern Ocean, the Northeast Pacific, east of New Zealand, and around Hawaii between 2004 and 2021. The residual water content of tunicates was analyzed for inter- and intraspecific variability. The H-surplus method (Madin et al. 1981) was applied for the residual water content calculation. The dataset contains information about the life cycle stage (blastozooid versus oozooid), tissue type (tunic versus whole organism), drying method (oven versus freeze-drying), size, and the elemental and organic contents of the samples. The methods and results of the study are described in detail in Lüskow et al. (submitted).

Keyword(s):

pyrosome; Salpa; stoichiometry; thaliaceans; water of hydration

Supplement to:

Lüskow, Florian; Balaji, Tanya; Pakhomov, Evgeny A (2024): Biased dry weight: The matter of residual water in seven pelagic tunicate species. Journal of Experimental Marine Biology and Ecology, 575, 152013, https://doi.org/10.1016/j.jembe.2024.152013

References:

Madin, L P; Cetta, C M; McAlister, V L (1981): Elemental and biochemical composition of salps (Tunicata: Thaliacea). Marine Biology, 63(3), 217-226, https://doi.org/10.1007/BF00395990

Coverage:

Median Latitude: -23.078470 * Median Longitude: 41.979381 * South-bound Latitude: -69.039200 * West-bound Longitude: -158.259000 * North-bound Latitude: 50.941000 * East-bound Longitude: 179.036833

Date/Time Start: 2004-04-12T23:45:00 * Date/Time End: 2021-05-27T19:26:00

Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 3200 m

Event(s):

IOS20210060_A2 * Latitude: 48.378000 * Longitude: -126.063000 * Date/Time: 2021-05-06T01:41:00 * Campaign: * Basis: * Method/Device: Bongo net (BONGO)

IOS20210060_JI22 * Latitude: 50.667000 * Longitude: -129.294000 * Date/Time: 2021-05-26T08:36:00 * Campaign: * Basis: * Method/Device: Bongo net (BONGO)

IOS20210060_LB16 * Latitude: 48.008000 * Longitude: -126.286000 * Date/Time: 2021-05-21T10:24:00 * Campaign: * Basis: * Method/Device: Bongo net (BONGO)

Comment:

Instruments used for:

* Freeze-drying: Edwards Modulyo Freeze Dryer (Oakville, Ontario, CA)

* Weighing: analytical balance (Sartorius BP 211 D, Perkin Elmer AD-6)

* CNH analysis: Elemental Analyzer CHN, Perkin Elmer 2400 Series II

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Lüskow, Florian
2	Sample ID	Sample ID		Lüskow, Florian
3	Cruise/expedition	Expedition		Lüskow, Florian
4	DATE/TIME	Date/Time		Lüskow, Florian		Geocode – UTC
5	Year of sampling	Year sampl		Lüskow, Florian
6	Vessel	Vessel		Lüskow, Florian
7	Station label	Station		Lüskow, Florian
8	Gear	Gear		Lüskow, Florian
9	DEPTH, water	Depth water	m	Lüskow, Florian		Geocode – min: depth layer upper boundary
10	DEPTH, water	Depth water	m	Lüskow, Florian		Geocode – max: depth layer lower boundary
11	Location	Location		Lüskow, Florian
12	LATITUDE	Latitude		Lüskow, Florian		Geocode
13	LONGITUDE	Longitude		Lüskow, Florian		Geocode
14	Species, unique identification	Species UID		Lüskow, Florian
15	Species, unique identification (Semantic URI)	Species UID (Semantic URI)		Lüskow, Florian
16	Species, unique identification (URI)	Species UID (URI)		Lüskow, Florian
17	Order	Order		Lüskow, Florian		taxonomic
18	Size	Size	mm	Lüskow, Florian		total length (in case of pyrosomes) and oral-atrial length (in case of salps)
19	Tissue Descriptor	Tissue Descriptor		Lüskow, Florian		three levels: stomach, tunic, whole
20	Method comment	Method comm		Lüskow, Florian		Drying method, two levels: FD = freeze-drying, OV = oven drying
21	Number of specimens	No spec	#	Lüskow, Florian		in sample
22	Life stage	Life stage		Lüskow, Florian		life cycle stage, two levels: B = blastozooid, O = oozooid
23	Container, mass	Con m	mg	Lüskow, Florian	Analytical balance, Sartorius, BP211D
24	Mass	Mass	mg	Lüskow, Florian	Calculated	Con m + Sample dm: container mass plus dry mass of sample
25	Sample, dry mass	Sample dm	mg	Lüskow, Florian	Analytical balance, Sartorius, BP211D
26	Mass	Mass	mg	Lüskow, Florian	Calculated	Con m + Ash m : container mass plus ash mass of sample
27	Ash mass	Ash m	mg	Lüskow, Florian	Analytical balance, Sartorius, BP211D
28	Ash free dry mass	afdm	mg	Lüskow, Florian	Calculated
29	Ash free dry mass	afdm	%	Lüskow, Florian	Calculated
30	Carbon, per dry mass	C/dm	%	Lüskow, Florian	Elemental analyzer, Perkin Elmer, 2400	by mass
31	Nitrogen, per dry mass	N/dm	%	Lüskow, Florian	Elemental analyzer, Perkin Elmer, 2400	by mass
32	Hydrogen, per dry mass	H/dm	%	Lüskow, Florian	Elemental analyzer, Perkin Elmer, 2400	by mass
33	Carbon/Nitrogen ratio	C/N		Lüskow, Florian	Calculated	by mass
34	Carbon/Nitrogen ratio	C/N	mol/mol	Lüskow, Florian	Calculated	molar
35	Carbon/Hydrogen ratio	C/H		Lüskow, Florian	Calculated	by mass
36	Hydrogen/Carbon ratio	H/C		Lüskow, Florian	Calculated	by mass
37	Comment	Comment		Lüskow, Florian		information on duplicate sample
38	Hydrogen	H	%	Lüskow, Florian	Calculation according to Madin et al. (1981)	H_est: estimated hydrogen content based on carbon content
39	Water, residual	H2O res	%	Lüskow, Florian	Calculation according to Madin et al. (1981)	H2O_est/dm: estimated residual water content based on H dm [%] and H_est
40	Sum	Sum	%	Lüskow, Florian	Calculation according to Madin et al. (1981)	CNHH2O/dm: sum of carbon, nitrogen, hydrogen, residual water as fraction of dry mass
41	Sum	Sum	%	Lüskow, Florian	Calculation according to Madin et al. (1981)	CNHH2O/AFDM: sum of carbon, nitrogen, hydrogen, residual water as fraction of ash-free dry mass

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

3370 data points

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