Citation:

meps11123

Name: Effect of acidification on an Arctic phytoplankton community from Disko Bay, West Greenland
Published: 2015-06-17
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Arctic; Bottles or small containers/Aquaria (<20 L); Chaetoceros sp.; Entire community; Growth/Morphology; Laboratory experiment; Navicula granii; Navicula sp.; Navicula vanhoeffenii; Open ocean; Pelagos; Phaeocystis pouchetii; Polar; Pyramimonas sp.; Thalassiosira sp.

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Abstract:

Long-term measurements (i.e. months) of in situ pH have not previously been reported from the Arctic; this study shows fluctuations between pH 7.5 and 8.3 during the spring bloom 2012 in a coastal area of Disko Bay, West Greenland. The effect of acidification on phytoplankton from this area was studied at both the community and species level in experimental pH treatments within (pH 8.0, 7.7 and 7.4) and outside (pH 7.1) in situ pH. The growth rate of the phytoplankton community decreased during the experimental acidification from 0.50 ± 0.01/day (SD) at pH 8.0 to 0.22 ± 0.01/day at pH 7.1. Nevertheless, the response to acidification was species-specific and divided into 4 categories: I, least affected; II, affected only at pH 7.1; III, gradually affected and IV, highly affected. In addition, the colony size and chain length of selected species were affected by the acidification. Our findings show that coastal phytoplankton from Disko Bay is naturally exposed to pH fluctuations exceeding the experimental pH range used in most ocean acidification studies. We emphasize that studies on ocean acidification should include in situ pH before assumptions on the effect of acidification on marine organisms can be made.

Keyword(s):

Arctic; Bottles or small containers/Aquaria (<20 L); Chaetoceros sp.; Entire community; Growth/Morphology; Laboratory experiment; Navicula granii; Navicula sp.; Navicula vanhoeffenii; Open ocean; Pelagos; Phaeocystis pouchetii; Polar; Pyramimonas sp.; Thalassiosira sp.

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse (2015): seacarb: seawater carbonate chemistry with R. R package version 3.0.6. https://cran.r-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: 69.216670 * Longitude: -53.366670

Event(s):

Qeqertarsuaq * Latitude: 69.216670 * Longitude: -53.366670 * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2015-06-01.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Figure	Fig		Thoisen, Christina
2	Treatment	Treat		Thoisen, Christina
3	Growth rate	µ	1/day	Thoisen, Christina		total chl a
4	Growth rate, standard deviation	µ std dev	±	Thoisen, Christina		total chl a
5	Growth rate	µ	1/day	Thoisen, Christina		chl a>10 µm
6	Growth rate, standard deviation	µ std dev	±	Thoisen, Christina		chl a>10 µm
7	Time in days	Time	days	Thoisen, Christina
8	Percentage	Perc	%	Thoisen, Christina		chl a>10 µm
9	Percentage, standard deviation	Perc std dev	±	Thoisen, Christina		chl a>10 µm
10	Species	Species		Thoisen, Christina
11	Growth rate	µ	1/day	Thoisen, Christina
12	Growth rate, standard deviation	µ std dev	±	Thoisen, Christina
13	Diameter	Ø	µm	Thoisen, Christina		coloni, minimum
14	Diameter	Ø	µm	Thoisen, Christina		coloni, maximum
15	Frequency	Frequency	%	Thoisen, Christina		colony size, day 1
16	Frequency	Frequency	%	Thoisen, Christina		dcolony size, ay 5
17	Thalassiosira spp.	Thalassiosira spp.	#	Thoisen, Christina		chain lenght (no. of cells)
18	Frequency	Frequency	%	Thoisen, Christina		chain length, day 1
19	Frequency	Frequency	%	Thoisen, Christina		chain length, day 11
20	pH	pH		Thoisen, Christina	Potentiometric	NBS scale
21	pH, standard deviation	pH std dev	±	Thoisen, Christina	Potentiometric	NBS scale
22	Salinity	Sal		Thoisen, Christina
23	Temperature, water	Temp	°C	Thoisen, Christina
24	Carbon, inorganic, dissolved	DIC	µmol/kg	Thoisen, Christina	Coulometric titration
25	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Thoisen, Christina	Coulometric titration
26	Bicarbonate ion	[HCO3]-	µmol/kg	Thoisen, Christina	Calculated using CO2SYS
27	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Thoisen, Christina	Calculated using CO2SYS
28	Carbonate ion	[CO3]2-	µmol/kg	Thoisen, Christina	Calculated using CO2SYS
29	Carbonate ion, standard deviation	[CO3]2- std dev	±	Thoisen, Christina	Calculated using CO2SYS
30	Carbon dioxide	CO2	µmol/kg	Thoisen, Christina	Calculated using CO2SYS
31	Carbon dioxide, standard deviation	CO2 std dev	±	Thoisen, Christina	Calculated using CO2SYS
32	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
33	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
34	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
35	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
36	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
40	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
41	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2880 data points

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