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    Abundance survey data on Tridacna spp. in the eastern Red Sea

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    Type
    Dataset
    Authors
    Rossbach, Susann
    Anton Gamazo, Andrea cc
    Duarte, Carlos M. cc
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2020
    Permanent link to this record
    http://hdl.handle.net/10754/669191
    
    Metadata
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    Abstract
    Abundance survey data on Tridacna spp. (Tridacna maxima and Tridacna squamosa) giant clams in the eastern Saudi Arabian Red Sea. Surveys cover a latitudinal gradient from 29-18 Degree, 7 different depths (0.5, 1.5, 3, 5, 8, 11, and 15m), windward and/or leeward sides of reefs, and different distances to the shore.
    Citation
    Rossbach, S., Anton, A., & Duarte, C. M. (2020). Abundance survey data on Tridacna spp. in the eastern Red Sea [Data set]. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/PANGAEA.921114
    Publisher
    PANGAEA - Data Publisher for Earth & Environmental Science
    DOI
    10.1594/pangaea.921114
    Additional Links
    https://doi.pangaea.de/10.1594/PANGAEA.921114
    Relations
    Is Supplement To:
    • [Article]
      Rossbach, S., Anton, A., & Duarte, C. M. (2021). Drivers of the Abundance of Tridacna spp. Giant Clams in the Red Sea. Frontiers in Marine Science, 7. doi:10.3389/fmars.2020.592852. DOI: 10.3389/fmars.2020.592852 Handle: 10754/667407
    ae974a485f413a2113503eed53cd6c53
    10.1594/pangaea.921114
    Scopus Count
    Collections
    Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program; Datasets

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    Related items

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    • Thumbnail

      Abundance, primary production rates and net calcification rates of Tridacna maxima giant clams at two reefs in the Central Red Sea, supplement to: Rossbach, Susann; Saderne, Vincent; Anton, Andrea; Duarte, Carlos M (2019): Light-dependent calcification in Red Sea giant clam $\textit{Tridacna maxima}$. Biogeosciences, 16(13), 2635-2650

      Rossbach, Susann; Saderne, Vincent; Anton Gamazo, Andrea; Duarte, Carlos M. (PANGAEA - Data Publisher for Earth & Environmental Science, 2019) [Dataset]
      Abundance data of Tridacna maxima giant clams at 6 different depths (0.5, 1.5, 3, 5 , 8 and 11m) at two reefs (Station 1 - 22.303833 N, 39.048278 E) and Station 2 - 20.753764 N, 39.442561 E ) in the Central Red Sea.Primary production in Tridacna maxima giant clams was assessed during the three different incident light incubations (561, 959, and 1061 μmol quanta m-2 s-1). Oxygen (μmol L-1) content in the incubation chambers was automatically logged (miniDOT, Precision Measurement Engineering, Inc., USA) in 15 min intervals over the 3 h incubation period. Net photosynthesis (NPP) was calculated from the variation of oxygen concentration over time and normalized for clam mantle surface area (μmol O2 cm-2 h-1). Dark respiration rates (R), also given in μmol O2 cm-2 h-1, were used to calculate gross primary production (GPP) as: GPP = NPP +R.Net calcification rates of the giant clam Tridacna maxima were determined under 7 different light levels (1061,959, 561, 530, 358, 244, and 197 μmol quanta m-2 s-1) and in the dark. At the start, after 3 h and after 6 h of each incubation, seawater was sampled from each experimental aquaria in gas tight 100mL borosilicate bottles (Schott Duran, Germany) and poisoned with mercury chloride, following Dickson et al. (2011). Each sample was analysed for TA by open-cell titration with an AS-ALK2 titrator (Apollo SciTech,USA) using certified seawater reference material (Andrew Dickson, Scripps Institution of Oceanography). During the incubations at moderate light levels (530, 358, 244,and 197 μmol quanta m-2 s-1), additional samples for dissolved inorganic carbon (DIC) were analysed using an ASC3 infrared DIC analyser (Apollo SciTech, USA). Further components of the carbonate system were calculated with R package Seacarb (Lavigne and Gattuso, 2013) using first and second carbonate system dissociation constants of Millero (2010) as well as the dissociations of HF and HSO-4 (Dickson, 1990; Dickson and Goyet, 1994), respectively. Net calcification (G in μmol CaCO3 h-1) was estimated from changes in total alkalinity (TA) using the alkalinity anomaly technique (Smith and Key, 1975), where delta TA is the variation of TA during the time (t ) of the incubations and the factor 2 accounts for a decrease in TA by two equivalents per CaCO3 precipitated (Zeebe and Wolf-Gladrow, 2001). Calcification rates were expressed relative to either mantle surface area (cm2) or tissue dry mass (g). For mantle surface area, the power relationship between standard length in centimetres (L) and mantle area (cm2) (Jantzen et al., 2008) was used to calculate the mantle surface in cm2. For tissue dry mass (DM in gram) of 5 clams, all clams were dissected and their biomass was determined subsequently to the incubation experiment. Clams were opened by cutting the adductor muscle with a scalpel, and the mantle and other tissues were separated from the shells and dried at 60 Degree Celsius for 24 to 48 h to determine tissue DM to the nearest 0.01 g.
    • Thumbnail

      Gross primary production of the giant clam Tridacna maxima to different levels of irradiance

      Rossbach, Susann; Overmans, Sebastian; Kaidarova, Altynay; Kosel, Jürgen; Agusti, Susana; Duarte, Carlos M. (PANGAEA - Data Publisher for Earth & Environmental Science, 2020) [Dataset]
      Metabolic and physiological responses of Red Sea Tridacna maxima clams, including net calcification and primary production, as well as valvometry (i.e. shell gaping behavior) were assessed when exposed to simulated high radiation levels received at 3 and 5 m underwater. The two levels of radiation included exposure treatments to photosynthetically active radiation (PAR; 400-700 nm) alone and to both, PAR and ultraviolet-B radiation (UV-B; 280-315 nm).
    • Thumbnail

      Net calcification of the giant clam Tridacna maxima to different levels of irradiance

      Rossbach, Susann; Overmans, Sebastian; Kaidarova, Altynay; Kosel, Jürgen; Agusti, Susana; Duarte, Carlos M. (PANGAEA - Data Publisher for Earth & Environmental Science, 2020) [Dataset]
      Metabolic and physiological responses of Red Sea Tridacna maxima clams, including net calcification and primary production, as well as valvometry (i.e. shell gaping behavior) were assessed when exposed to simulated high radiation levels received at 3 and 5 m underwater. The two levels of radiation included exposure treatments to photosynthetically active radiation (PAR; 400-700 nm) alone and to both, PAR and ultraviolet-B radiation (UV-B; 280-315 nm).
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