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Kraberg, Alexandra C; Druzhkova, Elena I; Heim, Birgit; Löder, Martin G J; Wiltshire, Karen Helen (2013): Phytoplankton abundance measured on water samples from rivers of the Lena Delta in 2010. PANGAEA, https://doi.org/10.1594/PANGAEA.793226, Supplement to: Kraberg, AC et al. (2013): Phytoplankton community structure in the Lena Delta (Siberia, Russia) in relation to hydrography. Biogeosciences, 10(11), 7263-7277, https://doi.org/10.5194/bg-10-7263-2013

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Abstract:
The Lena Delta in Northern Siberia is one of the largest river deltas in the world. During peak discharge, after the ice melt in spring, it delivers between 60-8000 m**3/s of water and sediment into the Arctic Ocean. The Lena Delta and the Laptev Sea coast also constitute a continuous permafrost region. Ongoing climate change, which is particularly pronounced in the Arctic, is leading to increased rates of permafrost thaw. This has already profoundly altered the discharge rates of the Lena River. But the chemistry of the river waters which are discharged into the coastal Laptev Sea have also been hypothesized to undergo considerable compositional changes, e.g. by increasing concentrations of inorganic nutrients such as dissolved organic carbon (DOC) and methane. These physical and chemical changes will also affect the composition of the phytoplankton communities. However, before potential consequences of climate change for coastal arctic phytoplankton communities can be judged, the inherent status of the diversity and food web interactions within the delta have to be established. In 2010, as part of the AWI Lena Delta programme, the phyto- and microzooplankton community in three river channels of the delta (Trofimov, Bykov and Olenek) as well as four coastal transects were investigated to capture the typical river phytoplankton communities and the transitional zone of brackish/marine conditions. Most CTD profiles from 23 coastal stations showed very strong stratification. The only exception to this was a small, shallow and mixed area running from the outflow of Bykov channel in a northerly direction parallel to the shore. Of the five stations in this area, three had a salinity of close to zero. Two further stations had salinities of around 2 and 5 throughout the water column. In the remaining transects, on the other hand, salinities varied between 5 and 30 with depth. Phytoplankton counts from the outflow from the Lena were dominated by diatoms (Aulacoseira species) cyanobacteria (Aphanizomenon, Pseudanabaena) and chlorophytes. In contrast, in the stratified stations the plankton was mostly dominated by dinoflagellates, ciliates and nanoflagellates, with only an insignificant diatom component from the genera Chaetoceros and Thalassiosira (brackish as opposed to freshwater species). Ciliate abundance was significantly coupled with the abundance of total flagellates. A pronounced partitioning in the phytoplankton community was also discernible with depth, with a different community composition and abundance above and below the thermocline in the stratified sites. This work is a first analysis of the phytoplankton community structure in the region where Lena River discharge enters the Laptev Sea.
Project(s):
Coverage:
Median Latitude: 72.128862 * Median Longitude: 129.537332 * South-bound Latitude: 71.565600 * West-bound Longitude: 125.290750 * North-bound Latitude: 72.745800 * East-bound Longitude: 132.422300
Date/Time Start: 2010-07-29T14:35:00 * Date/Time End: 2010-08-09T12:03:00
Minimum DEPTH, water: 0.0 m * Maximum DEPTH, water: 22.0 m
Event(s):
T1-10-01 * Latitude: 71.685700 * Longitude: 129.733500 * Date/Time: 2010-07-29T14:35:00 * Elevation: -4.4 m * Location: Laptev Sea * Campaign: Lena2010 * Basis: Sampling on land * Device: CTD/Rosette (CTD-RO) * Comment: Transect 1
T1-10-02 * Latitude: 71.733300 * Longitude: 129.801700 * Date/Time: 2010-07-29T16:18:00 * Elevation: -12.7 m * Location: Laptev Sea * Campaign: Lena2010 * Basis: Sampling on land * Device: CTD/Rosette (CTD-RO) * Comment: Transect 1
T1-10-03 * Latitude: 71.777800 * Longitude: 130.087200 * Date/Time: 2010-07-29T17:51:00 * Elevation: -10.2 m * Location: Laptev Sea * Campaign: Lena2010 * Basis: Sampling on land * Device: CTD/Rosette (CTD-RO) * Comment: Transect 1
Comment:
A further transect (transect 7) was sampled but not analyzed.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Sample code/labelSample label
3Date/Time of eventDate/Time
4Latitude of eventLatitude
5Longitude of eventLongitude
6Elevation of eventElevationm
7DEPTH, waterDepth watermGeocode
8Sample volumeSamp volmlKraberg, Alexandra C
9AcanthocerasAcanthoceras#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
10PlagiogrammopsisPlagiogrammopsis#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
11Thalassiosira spp.Thalassiosira spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
12CoscinodiscusCoscinodiscus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)>70 µm
13Stephanodiscus spp.Stephanodiscus spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
14cf. Cyclotellacf. Cyclotella#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
15Skeletonema spp.Skeletonema spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
16Chaetoceros spp.Chaetoceros spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
17Aulacoseira cells, otherAulacoseira cells oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
18Melosira cf. variansM. cf. varians#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
19Melosira spp.Melosira spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
20Tabellaria spp.Tabellaria spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
21Asterionella formosaA. formosa#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
22Aulacoseira granulataA. granulata#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
23Aulacoseira granulata var. angustissimaA. granulosa var. ang#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
24AulacoseiraAulacoseira#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)thin no spine
25NitzschiaNitzschia#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)including Pseudo-nitzschia
26Fragilaria cf. crotonensisF. cf. crotonensis#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
27FragilariaFragilaria#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1
28Synedra spp.Synedra spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
29Synedra ulnaSynedra ulna#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
30Fragilaria spp.Fragilaria spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
31Diatoma spp.Diatoma spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
32GomphonemaGomphonema#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
33Diatoms, pennalesDiatom pen#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length 20-50 µm
34Diatoms, pennalesDiatom pen#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length 50-100 µm
35Diatoms, pennalesDiatom pen#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length >100 µm
36Meridion spp.Meridion spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
37SurirellaSurirella#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
38Anabaena straightAnabaena straight#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)diameter >5 µm
39Anabaena straightAnabaena straight#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)diameter <5 µm
40CyanobacteriaCyanobacteria#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 4
41Anabaena, coiled, irregularAnabaena coiled irregu#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
42Anabaena, coiled, regularAnabaena coiled regu#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)>5 µm
43PicocyanophytesPicocyanophytes#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)colonial
44Aphanizomenon spp.Aphanizomenon spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
45Cuspidothrix issatchenkoiC. issatchenkoi#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)syn. Aphanizomenon issatchenkoi
46Cyanophyte filaments, undifferentiatedCyanophyte fila undiff#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
47Pseudoanabaena spp.Pseudoanabaena spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
48CyanophytesCyanophytes#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)other thin
49Planktothrix spp.Planktothrix spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
50Cyanophyte filaments, otherCyanophyte fila oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
51Aphanocapsa spp.Aphanocapsa spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
52Lyngbya spp.Lyngbya spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
53Desmodesmus spp.Desmodesmus spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
54Scenedesmus cf. acuminatusS. cf. acuminatus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
55ScenedesmusScenedesmus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 3
56Scenesesmus cf. ornatusS. cf. ornatus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
57ScenedesmusScenedesmus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 4
58ScenedesmusScenedesmus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 5
59Pediastrum spp.Pediastrum spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
60Pediastrum boryanumP. boryanum#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
61Pediastrum boryanum var. longicorneP. boryanum var. long#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
62Pediastrum duplexP. duplex#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
63Pediastrum duplex var. gracillimumP. duplex var. grac#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
64Pediastrum tetrasP. tetras#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
65Oocystis spp.Oocystis spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
66Flagellates, greenFlag gr#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
67Actinastrum cf. hantzschiiA. cf. hantzschii#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
68Closterium spp.Closterium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
69Spondylosium spp.Spondylosium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
70Coelastrum spp.Coelastrum spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
71Crucigenia spp.Crucigenia spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
72Crucigenia fenestrataC. fenestrata#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
73Tetraedron spp.Tetraedron spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
74Cosmarium spp.Cosmarium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
75Staurastrum spp.Staurastrum spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
76Chlorophyte indeterminataChloroph indet#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Selenastraceae
77Monoraphidium, curvedMonoraphidium curved#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
78Monoraphidium colonyMonoraphidium colony#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
79Monoraphidium contortumM. contortum#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
80Koliella/Ankistrodesmus/MonoraphidiumKoliella/Ankistrodesmus/Monoraphidium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)single straight filaments
81Elakatothrix spp.Elakatothrix spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
82Chlorophyte indeterminataChloroph indet#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
83ChlorophyteChlorophyte#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)colonial [#/l]
84DictyosphaeriumDictyosphaerium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
85Euglenid indeterminataEuglenid indet#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
86TrachelomonasTrachelomonas#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
87Trachelomonas cf. hispidaT. cf. hispida#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
88GymnodiniumGymnodinium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)medium
89GymnodiniumGymnodinium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)small, 20 µm diameter
90GymnodiniumGymnodinium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)large, 50 µm diameter
91Gyrodinium spp.Gyrodinium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length 20-50 µm
92Gyrodinium spp.Gyrodinium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length 75 µm
93Katodinium spp.Katodinium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
94Amphidinium cf. extensumA. cf. extensum#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
95Amphidinium cf. crassusA. cf. crassus#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
96Dinoflagellate sp.Dinofl sp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1
97ProtoperidiniumProtoperidinium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1
98ProtoperidiniumProtoperidinium#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1a
99Peridiniella catenataP. catenata#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
100Protoperidinium pellucidumP. pellucidum#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)including Protoperidinium pallidum
101Protoperidinium spp.Protoperidinium spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
102Heterocapsa-likeHeterocapsa-like#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
103Dinophysis acuminataD. acuminata#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
104Ceratium cf. hirundinellaC. cf. hirundinella#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
105PeridinialesPeridiniales#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)<20 µm
106PeridinialesPeridiniales#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)20-50 µm
107Dinoflagellates, otherDinofl oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)diameter 20-50 µm
108Ciliates, otherCilia oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)diameter 10-20 µm
109Ciliates, otherCilia oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)diameter 20-50µm
110Ciliates, otherCilia oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)diameter 50 µm
111Didinium gargantuaD. gargantua#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
112TintinnidTint#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1
113TintinnidTint#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1
114Myrionecta spp.Myrionecta spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
115CiliatesCil#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 1
116CiliatesCil#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)Species 2
117CiliatesCil#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)pointed
118SuctorianSuctorian#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
119CrysophytesCrysophytes#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
120CrysophytesCrysophytes#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)large
121Dinobryon spp.Dinobryon spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
122Dinobryon cf. cylindricumD. cf. cylindricum#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
123Ebria tripartitaE. tripartita#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
124CryptophytesCryptophytes#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length <20 µm
125CryptophytesCryptophytes#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length >20 µm
126FlagellatesFlag#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length <10 µm
127FlagellatesFlag#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length 20-50 µm
128FlagellatesFlag#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)length 10-20 µm
129Selenastrum spp.Selenastrum spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
130Lagerheimia spp.Lagerheimia spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
131Phytoplankton, unidentified cell, otherPhytopl unident oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
132Phytoplankton, unidentified cell cf. ActinastrumPhytopl unidentl cf. Actinastrum#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
133Unidentified chainUnident chain#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
134Bacteria, star-shapedBact star#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
135Keratella spp.Keratella spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
136Bosmina spp.Bosmina spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
137cf. Trichocerca spp.cf. Trichocerca spp.#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
138Rotifers, otherRotifers oth#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
139NaupliiNauplii#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
140Copepoda, adultCopepoda ad#/lKraberg, Alexandra CQuantitative phytoplankton method (Utermöhl, 1958)
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