Density, biomass and diversity of the diatom community at Faro, Creek and Isla D in Potter Cove (King George Island) in November and December 2016

• Main Authors: Al-Handal, Adil Yousif, Wulff, Angela, Hasemann, Christiane, Hoffmann, Ralf
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2018
• Subjects: Event label; Site; Latitude of event; Longitude of event; DATE/TIME; Elevation of event; Elevation of event 2; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Replicate; Achnanthes bongrain; Actinocyclus actinochilus; Amphora gourdonii; Amphora holsatica; Amphora marina; Amphora sp.; Asteromphalus parvulus; Biremis sp.; Cocconeis costata; Cocconeis imperatrix; Cocconeis matsii; Cocconeis orbicularis; Cocconeis pottercovei; Cocconeis schuettii; Corethron pennatum; Diploneis smithii; Entomoneis gigantea; Entomoneis kjellmanii; Entomoneis paludosa; Entopyla ocellata; Fragilariopsis cylindrus; Gyrosigma arcuatum; Gyrosigma fasciola; Gyrosigma obscurum; Licmophora antarctica; Licmophora decora; Lyrella abrupta; Navicula cancellata; Navicula directa; Navicula perminuta; Nitzschia angularis; Nitzschia hybrida; Odontella litigiosa; Parlibellus delognei; Petroneis plagiostoma; Petroneis sp.; Pinnularia quadratarea; Pleurosigma strigosum; Porosira glacialis; Pseudogomphonema kamtschaticum; Rhabdonema arcuatum; Surirella sp.; Synedropsis fragilis; Thalassiosira gravida; Thalassiosira maculata; Thalassiosira tumida; Thalassiosira sp.; Trachyneis aspera; Achnanthes bongrain, biomass as carbon; Actinocyclus actinochilus, biomass as carbon; Amphora gourdonii, biomass as carbon; Amphora holsatica, biomass as carbon; Amphora marina, biomass as carbon; Amphora sp., biomass as carbon; Asteromphalus parvulus, biomass as carbon; Biremis sp., biomass as carbon; Cocconeis costata, biomass as carbon; Cocconeis imperatrix, biomass as carbon; Cocconeis matsii, biomass as carbon; Cocconeis orbicularis, biomass as carbon; Cocconeis pottercovei, biomass as carbon; Cocconeis schuettii, biomass as carbon; Corethron pennatum, biomass as carbon; Diploneis smithii, biomass as carbon; Entomoneis gigantea, biomass as carbon; Entomoneis kjellmanii, biomass as carbon; Entomoneis paludosa, biomass as carbon; Entopyla ocellata, biomass as carbon; Fragilariopsis cylindrus, biomass as carbon; Gyrosigma arcuatum, biomass as carbon; Gyrosigma fasciola, biomass as carbon; Gyrosigma obscurum, biomass as carbon; Licmophora antarctica, biomass as carbon; Licmophora decora, biomass as carbon; Lyrella abrupta, biomass as carbon; Navicula cancellata, biomass as carbon; Navicula directa, biomass as carbon; Navicula perminuta, biomass as carbon; Nitzschia angularis, biomass as carbon; Nitzschia hybrida, biomass as carbon; Odontella litigiosa, biomass as carbon; Parlibellus delognei, biomass as carbon; Petroneis plagiostoma, biomass as carbon; Petroneis sp., biomass as carbon; Pinnularia quadratarea, biomass as carbon; Pleurosigma strigosum, biomass as carbon; Porosira glacialis, biomass as carbon; Pseudogomphonema kamtschaticum, biomass as carbon; Rhabdonema arcuatum, biomass as carbon; Surirella sp., biomass as carbon; Synedropsis fragilis, biomass as carbon; Thalassiosira gravida, biomass as carbon; Thalassiosira maculata, biomass as carbon; Thalassiosira tumida, biomass as carbon; Thalassiosira sp., biomass as carbon; Trachyneis aspera, biomass as carbon; Shannon Diversity Index; Sampling by diver; Bongrain; Faro; King George Island; Potter Cove; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.893272; https://doi.pangaea.de/10.1594/PANGAEA.893272

For benthic microalgae (microphytobenthos, MPB) community analyses, triplicates of small sediment cores (10 cm length, 3.6 cm diameter) were taken at the stations Faro, Creek and Isla D, respectively, by SCUBA divers during a field campaign to Potter Cove (King George Island, Antarctica) in November and December 2016. Additionally, one larger sediment core (50 cm length, 10 cm diameter), also collected by SCUBA divers, was subsampled for an additional MPB community sample.The upper 0.5 cm sediment layer of a sediment core was transferred into a scintillation vial and 5 mL GF/F filtered seawater (Whatman, UK) and 1 mL of 25% glutaraldehyde was added. The vial was wrapped in parafilm (Bemis Company, USA) and stored at 4°C until analyses in the home laboratory.For the identification and counting of diatoms, diatom valves were cleaned with 30% hydrogen peroxides and mounted in Naphrax after proper rinsing with deionized water (Al-Handal and Wulff, 2008a). Identification of taxa was made following established protocols (Witkowski et al., 2000; Scott and Thomas, 2005; Al-Handal and Wulff, 2008a, 2008b). Enumeration of diatom valves on the slides was made by counting intact valves on the whole slide using Zeiss Axio Image 2 compound microscope equipped with differential interphase contrast under 400-fold magnification. During the identification of taxa, the length and width of pennate valves and the diameter of centric valves were measured using a micrometer. The average length and width of at least 30 valves per taxon and the assumed height of 1 µm (Edler, 1979) were used to calculate the biovolume of diatom cells following Hillebrand et al. (1999) and Sun and Liu (2003). The diatom cell biovolumes were converted into diatom carbon biomass using a conversion factor of 0.089 pg C/ µm³ cell biovolume (Sundbäck et al., 1996). The Shannon-Wiener diversity index H' was calculated using Primer v6.