Citation:

fbt135

Name: Effects of ultraviolet radiation and CO2 increase on winter phytoplankton assemblages in a temperate coastal lagoon
Published: 2014-09-22
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Community composition and diversity; Entire community; Growth/Morphology; Light; North Atlantic; Pelagos; Primary production/Photosynthesis; Temperate

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Abstract:

Increases in ultraviolet radiation (UVR) and CO2 affect phytoplankton growth and mortality in a variety of different ways. However, in situ responses of natural phytoplankton communities to climate change, as well as its effects on phytoplankton annual cycles, are still largely unknown. Although temperature and UVR have been increasing in temperate latitudes during winter, this season is still particularly neglected in climate change studies, being considered a non-active season regarding phytoplankton growth and production. Additionally, coastal lagoons are highly productive ecosystems and very vulnerable to climate change. This study aims, therefore, to evaluate the short-term effects of increased UVR and CO2 on the composition and growth of winter phytoplankton assemblages in a temperate coastal lagoon. During winter 2012, microcosm experiments were used to evaluate the isolated and combined effects of UVR and CO2, under ambient and high CO2 treatments, exposed to ambient UV levels and photosynthetically active radiation (PAR), or to PAR only. Phytoplankton composition, abundance, biomass and photosynthetic parameters were evaluated during the experiments. Significant changes were observed in the growth of specific phytoplankton groups, leading to changes in community composition. The cyanobacterium Synechococcus was dominant at the beginning of the experiment, but it was negatively affected by UVR and CO2. Diatoms clearly benefited from high CO2 and UVR, particularly Thalassiosira. Despite the changes observed in specific phytoplankton groups, growth and production of the whole phytoplankton community did not show significant responses to UVR and/or CO2.

Keyword(s):

Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Community composition and diversity; Entire community; Growth/Morphology; Light; North Atlantic; Pelagos; Primary production/Photosynthesis; Temperate

Further details:

Lavigne, Héloïse; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0. https://cran.r-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 2014-09-19.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Species	Species		Domingues, Rita B
2	Table	Tab		Domingues, Rita B
3	Figure	Fig		Domingues, Rita B
4	Treatment	Treat		Domingues, Rita B
5	Growth rate	µ	1/day	Domingues, Rita B		net
6	Growth rate, standard error	µ std e	±	Domingues, Rita B		net
7	Photosynthetic efficiency, carbon production	alpha	mg C/(µE/m²/s)/mg Chl/h	Domingues, Rita B
8	Photosynthetic efficiency, standard error	alpha std e	±	Domingues, Rita B
9	Production rate, maximal, light saturated, as carbon per chlorophyll a	PBmax	mg C/mg Chl a/h	Domingues, Rita B
10	Production rate, maximal, light saturated, as carbon normalized to chlorophyll a, standard error	PBmax std e	±	Domingues, Rita B
11	Irradiance	E	µmol/m²/s	Domingues, Rita B		optimal
12	Irradiance, standard error	E std e	±	Domingues, Rita B		optimal
13	Incubation duration	Inc dur	days	Domingues, Rita B
14	Cell density	Cells	#/ml	Domingues, Rita B
15	Salinity	Sal		Domingues, Rita B
16	Temperature, water	Temp	°C	Domingues, Rita B
17	pH	pH		Domingues, Rita B		NBS scale
18	Carbon, inorganic, dissolved	DIC	µmol/kg	Domingues, Rita B
19	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Domingues, Rita B	Calculated using seacarb
20	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
21	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
22	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
23	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)
24	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)
25	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
26	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
27	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
28	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
29	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:

663 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Species	2 Tab	3 Fig	4 Treat	5 µ [1/day] (net)	6 µ std e [±] (net)	7 alpha [mg C/(µE/m²/s)/mg Chl/h]	8 alpha std e [±]	9 PBmax [mg C/mg Chl a/h]	10 PBmax std e [±]	11 E [µmol/m²/s] (optimal)	12 E std e [±] (optimal)	13 Inc dur [days]	14 Cells [#/ml]	15 Sal	16 Temp [°C]	17 pH (NBS scale)	18 DIC [µmol/kg]	19 pCO2water_SST_wet [µatm] (Calculated using seacarb)	20 CSC flag (Calculated using seacarb afte...)	21 pH (total scale, Calculated using...)	22 CO2 [µmol/kg] (Calculated using seacarb afte...)	23 pCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	24 fCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	25 [HCO3]- [µmol/kg] (Calculated using seacarb afte...)	26 [CO3]2- [µmol/kg] (Calculated using seacarb afte...)	27 AT [µmol/kg] (Calculated using seacarb afte...)	28 Omega Arg (Calculated using seacarb afte...)	29 Omega Cal (Calculated using seacarb afte...)
		3	control	0.4105	0.09345									35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
		3	high CO2	0.5810	0.09537									35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
		3	UVR	0.6544	0.07267									35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
		3	UVR high CO2	0.6206	0.08182									35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
Cyanobacteria (phytoplankton)		4A	control	0.1125	0.04670									35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
Cyanobacteria (phytoplankton)		4A	high CO2	-0.5000	0.15370									35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
Cyanobacteria (phytoplankton)		4A	UVR	-0.4400	0.08596									35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
Cyanobacteria (phytoplankton)		4A	UVR high CO2	-0.5000	0.11180									35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
Cryptophytes (phytoplankton)		4B	control	0.6977	0.19130									35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
Cryptophytes (phytoplankton)		4B	high CO2	0.5358	0.12810									35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
Cryptophytes (phytoplankton)		4B	UVR	1.0500	0.15340									35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
Cryptophytes (phytoplankton)		4B	UVR high CO2	0.7607	0.11810									35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
Diatoms (phytoplankton)		4C	control	0.2616	0.04846									35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
Diatoms (phytoplankton)		4C	high CO2	0.7124	0.07217									35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
Diatoms (phytoplankton)		4C	UVR	0.5959	0.04636									35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
Diatoms (phytoplankton)		4C	UVR high CO2	0.7880	0.02943									35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
	1		control			0.00907	0.03070	3.90	0.29	265.10	20.20			35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
	1		high CO2			0.00627	0.02196	3.23	0.30	226.03	17.20			35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
	1		UVR			0.00583	0.02667	3.32	0.17	292.03	13.60			35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
	1		UVR high CO2			0.00966	0.05621	3.50	0.13	298.70	18.20			35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
Cyanobacteria (phytoplankton)		2	initial									0	1285
Cyanobacteria (phytoplankton)		2	control									2	1600	35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
Cyanobacteria (phytoplankton)		2	high CO2									2	521	35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
Cyanobacteria (phytoplankton)		2	UVR									2	546	35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
Cyanobacteria (phytoplankton)		2	UVR high CO2									2	498	35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
Cryptophytes (phytoplankton)		2	initial									0	153
Cryptophytes (phytoplankton)		2	control									2	620	35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
Cryptophytes (phytoplankton)		2	high CO2									2	428	35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
Cryptophytes (phytoplankton)		2	UVR									2	1220	35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
Cryptophytes (phytoplankton)		2	UVR high CO2									2	668	35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75
Diatoms (phytoplankton)		2	initial									0	97
Diatoms (phytoplankton)		2	control									2	139	35	16.50	8.11	2407.13	393.54	27	8.00	18.86	528.75	526.90	2215.12	173.14	2633.17	2.66	4.13
Diatoms (phytoplankton)		2	high CO2									2	568	35	16.07	7.93	2515.64	629.62	27	7.82	30.58	845.82	842.85	2364.78	120.28	2654.89	1.85	2.87
Diatoms (phytoplankton)		2	UVR									2	278	35	15.03	8.13	2383.03	374.44	27	8.01	18.56	497.82	496.05	2196.02	168.45	2604.14	2.58	4.01
Diatoms (phytoplankton)		2	UVR high CO2									2	395	35	16.57	7.91	2503.79	666.53	27	7.79	31.87	894.54	891.41	2356.42	115.49	2635.18	1.77	2.75