Svalbard Intertidal Project : Expedition Isfjorden 2009

Samples have been already pretreated, and now are being analised. As data would appear it will be published here.

ANOTHER MYSTERIOUS ALGA

5.11.2010

As survey of Svalbard's intertidal zone continues new mysterious being was encounted. Small green bushes inhabited muddy Adventelva's tidal flat (the very end of Adventfjodren), and weren't observed before (at least according to what we know).
After closer look it turned out its tube dwelling diatom belonging to Gyrosigma genus, we suppose.

Please find some pictures below. (links open in new window/tab)

habitat	10x overview	10x bottom part	40x tube
tube with cells	tube 2	60x cell burned	60x cell burned 2

GAMMARUS INDEX

We associate presence of Gammarus oceanicus with warmer atlantic waters, and Gammarus setosus with colder arctic water masses. The figure below show occurence of those two species ratios at stations.

Occurrence of Gammarus oceanicus (orange - atlantic water) and Gammarus setosus (blue - arctic water) at stations.

SPECIES OCCURENCE AND QUANTITIES AT STATIONS

Please find here tables of species identified at stations. Those are raw data. Two stations are still lacking, but will be soon available (as soon as we finish its examination). Two formats of data are presented - density in case of macrofauna or wet weight per square meter for macrophytes.

Jump to station:

104.1 _skjerra
106.1 _skjerra
113.3 _beach
113.4 _beach
120.1 _beach
120.9 _beach
122.2 _beach
126.1 _skjerra
127.1 _beach
127.1 _skjerra

STATION 104.1

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
skjerra	2	Fabricia sabella	48	x
		Littorina shell	+	+
		Mollusca sp.	32	x
		Oligochaeta sp. algal	592	x
		Semibalanus balanoides	240	x
		Acrosiphonia flagellata	x	0,8
		Delamarea attenuata	x	22,50
		Detrytus	x	44,14
		Enteromorpha porifera	x	0,58
		Fucus sp. Juv.	x	9,54
		Pilayella litoralis	x	11,22
	3	Fabricia sabella	48	x
		Margerites helicinus	32	x
		Oligochaeta	320	x
		Onisimus litorallis	16	x
		Semibalanus balanoides	944	x
		Turbelaria sp. dotted	80	x
		Delamarea attenuata	x	6,58
		Detrytus	x	11,04
		Enteromorpha porifera	x	0,72
		Fucus sp.	x	1,66
		Pilayella litoralis	x	25,26

Back to stations selection

STATION 106.1

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
skjerra	1	Gammarus oceanicus	512	x
		Littorina saxatilis	5888	x
		Oligochaeta	2048	x
		Dictiosiphon foeniculaceus	P	P
		Fucus cf. Fucus evanescens	x	680,2
	2	Gammarus oceanicus	13312	x
		Littorina saxatilis	25600	x
		Oligochaeta	512	x
		Dictiosiphon foeniculaceus	x	P
		Fucus cf. Fucus evanescens	x	680,44
	3	Buccinidae sp. juv.	512	x
		Fabricia sabella	4608	x
		Gammarus oceanicus	3072	x
		Littorina saxatilis	31744	x
		Oligochaeta	5120	x
		Dictiosiphon foeniculaceus	x	P
		Fucus cf. Fucus evanescens	x	446,76

Back to stations selection

STATION 113.3

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
beach	1	Turbelaria sp. white	3584	x
		Gammarus setosus	32	x
		Oligochaeta	32	x
		Gammarus sp. juv.	16	x
	2	Turbelaria sp. white	7632	x
		Oligochaeta	176	x
		Gammarus setosus	96	x
		Bryozoa unid.	Present	x
	3	Turbelaria sp. white	4736	x
		Oligochaeta	789,33	x
		Gammarus setosus	592	x

Back to stations selection

STATION 113.4

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
beach	1	Oligochaeta	144	x
		Turbelaria sp. white	96	x
		Onisimus litorallis	80	x
	2	Oligochaeta	80	x
		Onisimus litorallis	48	x
		Turbelaria sp. white	48	x
	3	Oligochaeta	656	x
		Turbelaria sp. white	80	x
		Onisimus litorallis	32	x

Back to stations selection

STATION 120.1

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
beach	1	Turbelaria sp. dotted	19584	x
		Turbelaria sp. white	896	x
	2	Turbelaria sp. dotted	11722,67	x
		Turbelaria sp. white	1418,67	x
		Oligochaeta	74,67	x
	3	Turbelaria sp. dotted	7141,33	x
		Turbelaria sp. white	693,33	x
		Oligochaeta	69,33	x

Back to stations selection

STATION 120.9

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
beach	1	Turbelaria sp. dotted	21760	x
		Oligochaeta	5168	x
		Turbelaria sp. white	816	x
	2	Turbelaria sp. dotted	18816	x
		Turbelaria sp. white	1920	x
		Oligochaeta	768	x
	3	Turbelaria sp. dotted	65920	x
		Oligochaeta	4352	x
		Turbelaria sp. white	1792	x

Back to stations selection

STATION 122.2

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
beach	1	Turbelaria sp. white	496	x
		Oligochaeta	48	x
	2	Oligochaeta	208	x
		Turbelaria sp. white	48	x
	3	void	0	x

Back to stations selection

STATION 126.1

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
skjerra	1	Fabricia sabella	2560	x
		Gammarus oceanicus	768	x
		Oligochaeta	2048	x
		Delamarea attenuata	x	12,22
		Fucus sp. cf F. Evanescens	x	187,62
		Scytosiphon tortilis	x	11,26
	2	Capitella capitata	4960	x
		Fabricia sabella	63840	x
		Dictiosiphon foeniculus	x	-9999
		Fucus sp.	x	62,96
		Nitkowate	x	392,48
		Sphacelaria plumosa	x	-9999
	3	Fabricia sabella	448	x
		Gammarus oceanicus	256	x
		Oligochaeta	80	x
		Fucus sp. cf F. Evanescens	x	2,43
		Pilayella litoralis	x	2,08

Back to stations selection

STATION 127.1

PLACE	REP	TAXON	DENSITY	WET WEIGHT
			[ind/m2]	[g/m2]
beach	1	Turbelaria sp. white	80	x
		Turbelaria sp. dotted	32	x
	2	Turbelaria sp. dotted	96	x
		Turbelaria sp. white	96	x
	3	Turbelaria sp. white	80	x

skjerra	1	Oligochaeta	8912	x
		Gammarus oceanicus	560	x
		Fabricia sabella	16	x
		Pilayella litoralis	x	165,12
		Acrosiphonia flagellata	x	6,72
		Fucus sp.	x	0,64
		Scytosiphon lomentaria	x	0,16
	2	Oligochaeta	160	x
		Turbelaria sp. white	48	x
		Gammarus oceanicus	32	x
		Pilayella litoralis	x	20,96
		Acrosiphonia flagellata	x	25,12
		Scytosiphon lomentaria	x	Present
	3	Oligochaeta	416	x
		Turbelaria sp. dotted	64	x
		Gammarus setosus	32	x
		Pilayella litoralis	x	62,08

Back to stations selection

To be continued...