Supplementary material for:
Article title
Hot spots for carbon emissions from Mediterranean fluvial networks during summer
drought
Journal name
Biogeochemistry
Author names
Lluís Gómez-Gener, Biel Obrador, Daniel von Schiller, Rafael Marcé, Joan Pere CasasRuiz, Lorenzo Proia, Vicenç Acuña, Núria Catalán, Isabel Muñoz and Matthias
Koschorreck
Corresponding author:
Ll. Gómez-Gener
Department d’Ecologia, Universitat de Barcelona, Barcelona, Spain
This section contains:
Online Resource Fig. S1. Examples of field flux measurements applying the chamber
method in both aquatic and dry bed environments. Dimensions of both the aquatic and
the soil chamber.
Online Resource Fig. S2. Spatial variations of CO2 efflux, CO2 concentration and O2
concentration in the aquatic environments sampled along a longitudinal gradient from
headwaters to the mouth of the Fluvià River.
Online Resource Table S1. A data set of chemical, hydrological, and morphological
parameters of the different studied sites. Detailed information about the analytical
technique used for the determination of the reported parameters is described in the
corresponding table caption.
(a)
(b)
(c)
(d)
d = 1.6 dm
b = 1.4 dm
h = 1.2 dm
c = 3.7 dm
a = 2.6 dm
V = 14.6 dm3
V = 2.2 dm3
S = 9.8 dm2
S = 2 dm2
Online Resource Fig. S1 Examples of field flux measurements made in a an aquatic environment
and b a dry river bed. Dimensions of c the aquatic chamber and d the soil chamber.
Online Resource Fig. S2 Spatial variation of a CO2 efflux, b CO2 concentration and c O2
concentration in the aquatic environments sampled along a longitudinal gradient from headwaters
to the mouth of the Fluvià River.
Online Resource Table S1 Location, surface water physicochemistry and hydromorphological characteristics of the studied sites
Environment
Location
X
(UTM)
Running waters
Impounded waters
Isolated pools
Dry beds
Y
(UTM)
Surface water physicochemistry
Stream order
Cond.
Water temp.
(ºC)
(µS cm-1)
pH
Hydromorphologic characteristics
O2
(%)
DOC
DIC
DIN
P-PO43-
(mg L-1)
(mg L )
Mean depth
(m)
Discharge
(mg L-1)
Mean width
(m)
Mean velocity
(mg L-1)
(m s-1)
(m3 s-1)
-1
478288.00 4669565.00
4
19.3
809
8.29
89.3
1.8
56.5
2.8
0.03
6.9
0.21
0.30
0.12
466173.50 4672993.31
5
19.2
828
8.29
110.8
1.7
55.3
3.6
0.23
12.7
0.14
0.62
0.88
504755.14 4669171.03
5
20.3
908
7.79
83.1
1.0
47.6
1.0
0.00
22.7
0.24
0.64
2.65
466139.00 4683037.00
2
16.7
674
7.72
92.9
0.6
36.4
0.0
0.00
4.1
0.11
0.09
0.03
488016.15 4671133.08
5
22.3
906
8.40
104.3
2.0
48.2
1.7
0.08
23.7
0.31
0.54
2.72
455646.68 4669068.73
3
16.1
492
8.29
93.9
1.3
62.8
4.5
0.01
3.4
0.163
0.4
0.12
Surface area
Volume
(hm )
2
(hm )
Residence time
(h)
Mean depth
(m)
3
456466.28 4669282.00
3
16.8
507
8.13
76.8
1.8
58.1
3.5
0.03
1.2
0.017
39.8
2.50
466121.25 4683366.22
2
17.2
674
8.40
104.2
0.7
35.5
0.0
0.00
0.1
0.001
5.1
1.52
480532.44 4670540.79
5
21.7
788
8.24
82.5
3.5
44.3
1.9
0.11
10.9
0.171
49.7
1.82
502182.40 4668511.88
5
22.8
845
8.21
136.2
1.4
46.9
0.9
0.00
3.7
0.027
3.7
1.14
485882.00
4688563.00
4
23.9
323
8.25
86.2
3.2
29.3
0.0
0.00
256.0
37.999
4247.6
16.50
454538.81 4664338.02
3
17.2
271
7.11
28.6
5.7
26.0
1.3
0.16
lenght (m)
(5-10)
454516.45 4664288.20
2
17.6
251
7.57
40.9
5.4
23.8
1.2
0.18
width (m)
(2-5)
454465.20 4664244.11
2
17.8
239
7.51
32.5
4.9
21.8
1.3
0.19
ldepth (m)
(0.5-2)
454432.07 4664233.22
3
20.7
217
7.42
22.9
15.5
18.8
0.9
0.15
454415.45 4664220.38
2
18.1
229
7.53
40.9
7.2
20.9
1.2
0.19
454536.99 4664335.08
2
454868.32 4661578.51
2
486488.53 4688216.26
2
Strahler stream order was calculated with the Hydrological Extension in ESRI® ArcGISTM v. 10.0 software, data from a 2-meter digital elevation model (DEM)
Reported surface water physicochemical parameters are means of three measurements (n=3) at the same location where the flux measurements were carried out
Surface water temperature (Water temp.) and conductivity (Cond.) were measured with a portable probe (Cond 3310, WTW, Germany)
pH was measured with a portable probe (pH 3110, WTW, Germany)
Oxygen saturation (O2) was measured with a portable probe (YSI ProODO Handheld, Yellow Springs, USA)
Dissolved organic and inorganic carbon concentrations in water (DOC and DIC) were measured from 0.45 µm-filtered water samples with a total organic carbon analyser
(TOC-V CSH, Shimadzu, Japan). The samples for DOC determination were previously acidified to eliminate dissolved inorganic constituents
Ammonium concentration (NH4+) was analysed with ion chromatography (IC5000, DIONEX, USA) using an anion-exchange column (IonPac® AS18, DIONEX, USA)
Dissolved nitrite (NO2-), nitrate (NO3-) and phosphate (PO4-3) concentrations were analysed with ion chromatography (IC5000, DIONEX, USA) using a cationexchange column (IonPac® CS16 , DIONEX, USA). Dissolved inorganic nitrogen (DIN) concentration is the sum of NH4+, NO2-, and NO3-concentrations.
The methodology used to calculate the hydromorphological parameters is detailed in the manuscript.
The size range of isolated pools is approximated.