Citation:

fiw116

Name: (Table 1) Methane concentrations, MOX rates and MOB abundance in arctic aquatic ecosystems of the Lena Delta, Northeast Siberia
Published: 2016-06-20
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Arctic Tundra; Bacteria/Archaea; Lake/Pond; Methane; oxidation/reduction; river delta

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Abstract:

Large amounts of organic carbon are stored in Arctic permafrost environments, and microbial activity can potentially mineralize this carbon into methane, a potent greenhouse gas. In this study, we assessed the methane budget, the bacterial methane oxidation (MOX) and the underlying environmental controls of arctic lake systems, which represent substantial sources of methane. Five lake systems located on Samoylov Island (Lena Delta, Siberia) and the connected river sites were analyzed using radiotracers to estimate the MOX rates, and molecular biology methods to characterize the abundance and the community composition of methane-oxidizing bacteria (MOB). In contrast to the river, the lake systems had high variation in the methane concentrations, the abundance and composition of the MOB communities, and consequently, the MOX rates. The highest methane concentrations and the highest MOX rates were detected in the lake outlets and in a lake complex in a floodplain area. Though, in all aquatic systems we detected both, Type I and II MOB, in lake systems we observed a higher diversity including MOB, typical of the soil environments. The inoculation of soil MOB into the aquatic systems, resulting from permafrost thawing, might be an additional factor controlling the MOB community composition and potentially methanotrophic capacity.

Keyword(s):

Arctic Tundra; Bacteria/Archaea; Lake/Pond; Methane; oxidation/reduction; river delta

Coverage:

Median Latitude: 72.377787 * Median Longitude: 126.501583 * South-bound Latitude: 72.366800 * West-bound Longitude: 126.469700 * North-bound Latitude: 72.391600 * East-bound Longitude: 126.526500

Date/Time Start: 2012-07-20T00:00:00 * Date/Time End: 2012-07-20T00:00:00

Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 6 m

Event(s):

Samoylov_Island * Latitude: 72.376480 * Longitude: 126.489230 * Elevation: 8.0 m * Location: Samoylov Island, Lena Delta, Siberia * Method/Device: Multiple investigations (MULT)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Lake	Lake		Wagner, Dirk
2	Comment	Comment		Wagner, Dirk	Complex constituents
3	DATE/TIME	Date/Time		Wagner, Dirk	Geocode
4	LATITUDE	Latitude		Wagner, Dirk	Geocode
5	LONGITUDE	Longitude		Wagner, Dirk	Geocode
6	DEPTH, water	Depth water	m	Wagner, Dirk	Geocode
7	Area	Area	m²	Wagner, Dirk	Water surface area of lake
8	Record length	Length	m	Wagner, Dirk	of outlet
9	Depth, bathymetric	Bathy depth	m	Wagner, Dirk
10	Methane	CH4	nmol/l	Wagner, Dirk
11	Methane, standard deviation	CH4 std dev	±	Wagner, Dirk
12	Methane oxidation rate	MOX	nmol/l/h	Wagner, Dirk
13	Methane oxidation rate, standard deviation	MOX std dev	±	Wagner, Dirk
14	Bacteria, methane oxidizing, abundance	MOB	#/ml	Wagner, Dirk
15	Bacteria, methane oxidizing, abundance, standard deviation	MOB std dev	±	Wagner, Dirk
16	Temperature, water	Temp	°C	Wagner, Dirk
17	Salinity	Sal		Wagner, Dirk
18	Oxygen	O2	µmol/l	Wagner, Dirk
19	Suspended particulate matter	SPM	mg/l	Wagner, Dirk

License:

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

Size:

297 data points

Data

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

1 Lake	2 Comment	3 Date/Time	4 Latitude	5 Longitude	6 Depth water [m]	7 Area [m²]	8 Length [m]	9 Bathy depth [m]	10 CH4 [nmol/l]	11 CH4 std dev [±]	12 MOX [nmol/l/h]	13 MOX std dev [±]	14 MOB [#/ml]	15 MOB std dev [±]	16 Temp [°C]	17 Sal	18 O2 [µmol/l]	19 SPM [mg/l]
North lake complex	Lake at surface	2012-07	72.3867	126.4826	0	9000			22974	1442.00	357.0	24.0	41.0	13.0	15.0	0.04	296.875	11.50
North lake complex	Lake at bottom	2012-07	72.3867	126.4826
North lake complex	Outlet	2012-07	72.3887	126.4837	0		200	0.1	5409	110.00	151.0	31.0	18.0	3.0	14.0	0.04	280.000	8.80
North lake complex	River near the shore	2012-07	72.3893	126.4844	0			0.5	6406	626.00	109.0	0.4	130.0	30.0	14.0	0.04	305.313	43.72
North lake complex	River middle at surface	2012-07	72.3916	126.4870	0				153	1.00	1.0	0.2	1.6	0.4	17.0	0.00	302.500	27.85
North lake complex	River middle at bottom	2012-07	72.3916	126.4870	6
Mirror lake complex	Lake at surface	2012-07	72.3701	126.5185	0	11500		6.0	258	7.00	8.0	0.3	0.7	0.2	11.3	0.00	306.875	7.02
Mirror lake complex	Lake at bottom	2012-07	72.3701	126.5185					240	16.00	9.0	1.0				0.00	310.000	29.55
Mirror lake complex	Outlet	2012-07	72.3706	126.5224	0		10	0.1	24343	176.00	480.0	19.0	24.0	3.0	11.3	0.20	297.188	56.81
Mirror lake complex	River near the shore	2012-07	72.3705	126.5233	0			0.5	140	3.00	0.4	0.0	11.0	2.0	17.0	0.00	297.500	91.80
Mirror lake complex	River middle at surface	2012-07	72.3700	126.5265	0				146	3.00	0.3	0.0	6.0	2.0		0.00	298.125	22.05
Mirror lake complex	River middle at bottom	2012-07	72.3700	126.5265					146		0.4	0.0				0.00	293.438	27.10
Sauna lake complex	Lake at surface	2012-07	72.3684	126.4832	0	27000		4.0	747		8.5	0.7	1.8	0.3		0.00	313.125	9.42
Sauna lake complex	Lake at bottom	2012-07	72.3684	126.4832
Sauna lake complex	Outlet	2012-07	72.3688	126.4736	0		100	0.1	912	8.00	13.0	0.4	4.8	0.1		0.00	281.875	229.20
Sauna lake complex	River near the shore	2012-07	72.3681	126.4722	0			0.5	150	0.03	0.7	0.0	2.8	1.0		0.00	270.000	12.27
Sauna lake complex	River middle at surface	2012-07	72.3668	126.4697	0				197		1.0	0.1	1.2	1.3		0.00	275.625	8.37
Sauna lake complex	River middle at bottom	2012-07	72.3668	126.4697	6				171	10.00	0.9	0.0					263.750	26.65
East lake complex	Lake at surface	2012-07	72.3752	126.5197	0	22000			205	6.00	0.2	0.0			15.7	0.00	286.250	3.55
East lake complex	Lake at bottom	2012-07	72.3752	126.5197
East lake complex	Outlet	2012-07	72.3778	126.5178	0		100	0.1	166	0.50	0.6	0.0				0.00	293.750	2.52
East lake complex	River near the shore	2012-07	72.3790	126.5193	0			0.5	193	15.00	1.4	0.2	8.5	2.2		0.00	300.313	32.75
East lake complex	River middle at surface	2012-07	72.3798	126.5232	0				146	2.00	0.7	0.1	8.0		17.0	0.00	283.438	29.97
East lake complex	River middle at bottom	2012-07	72.3798	126.5232	6
Cotton lake complex	Lake at surface	2012-07	72.3839	126.5010	0	8000		6.0	249	7.00	0.3	0.0			13.4	0.00	259.375	1.10
Cotton lake complex	Lake at bottom	2012-07	72.3839	126.5010					308	16.00	9.1	1.9				0.00	259.375
Cotton lake complex	Outlet	2012-07	72.3835	126.5045	0		100	0.1	12490	293.00	151.0	10.0	1.0	0.1	13.4	0.00	254.063	9.95
Cotton lake complex	River near the shore	2012-07	72.3837	126.5061	0			0.5	256	2.00	1.1	0.1		16.5		0.00	253.438	29.55
Cotton lake complex	River middle surface	2012-07	72.3843	126.5087	0				216	7.00	1.2	0.1	6.0	4.7	16.5	0.00	248.750	25.05
Cotton lake complex	River middle at bottom	2012-07	72.3843	126.5087	6				216	3.00	1.4	0.2				0.00	248.438	50.50