PANGAEA_921409 Seasonal and spatial distributions of grain size and organic matter content across an intertidal area at St. Lawrence Estuary, Canada Waqas, Atif; Neumeier, Urs; Rochon, André Seasonal and spatial distributions of grain size and organic matter content across an intertidal area at St. Lawrence Estuary, Canada 2020-08-10 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.921409 Investigator Atif Waqas atifwqs@hotmail.com Earth Science Event label Latitude of event Longitude of event Elevation of event Campaign Gravel Sand Silt Clay minerals Grain size, mean Median, grain size Sorting geoscientificInformation B1 B2 B3 B4 B5 B6 B7 B8 B9 Grain Size Intertidal cohesive sediments Multiple investigations organic matter St.Lawrence_B1 St.Lawrence_B2 St.Lawrence_B3 St.Lawrence_B4 St.Lawrence_B5 St.Lawrence_B6 St.Lawrence_B7 St.Lawrence_B8 St.Lawrence_B9 CamsizerXT (Retsch Technology), statistical analysis GRADISTAT package (Blott and Pye, 2001) Geometric method of moments Complete 48.44233654 48.45070791 -68.56915008 -68.56447022 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 72 data points text/tab-separated-values Waqas, Atif; Neumeier, Urs; Rochon, André (2020): Seasonal changes in sediment erodibility associated with biostabilization in a subarctic intertidal environment, St. Lawrence Estuary, Canada. Estuarine, Coastal and Shelf Science, 245, 106935, https://doi.org/10.1016/j.ecss.2020.106935 Waqas, Atif; Neumeier, Urs; Rochon, André (2020): Spatial and annual patterns of grain size and organic matter content in an intertidal area, St. Lawrence Estuary, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.911771

Grain size distribution and organic matter content (loss on ignition) of surface scrape sediments were analyzed in summer 2016, autumn 2017, and summer 2018 at Nazareth tidal flat and marsh located west of Rimouski on the southern shore of Lower St. Lawrence Estuary (Canada). Surface sediment samples for analysis of grain size and organic matter content were collected at each site within 1 m radius of CSM measurements using a spatula to scrape the top 2-3 cm of sediments. The combustible organic matter content (loss on ignition, LOI) of the surface sediments was determined after: (1) drying at 60°C for 24 h until no weight change occurred; (2) placing in oven at 450°C for 16 h. For grain size analysis, the coarse and the fine grain size distributions were processed with Gradistat (Blott and Pye, 2001) to compute median grain size (d50), mean grain size, and sorting using the geometric moment method. The sorting is calculated similarly to a standard deviation. Cross-shore transect B was sampled in November 2017 for which, the data is presented here. The data for summer 2016, summer 2017, and summer 2018 was published in the context of annual variations in sediment biostabilization (Waqas et al., 2019, doi:10.1594/PANGAEA.911771) ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.921409"!

https://doi.org/10.1002/esp.261 CamsizerXT (Retsch Technology), statistical analysis GRADISTAT package (Blott and Pye, 2001) https://doi.org/10.1016/j.ecss.2020.106935 Seasonal changes in sediment erodibility associated with biostabilization in a subarctic intertidal environment, St. Lawrence Estuary, Canada https://doi.pangaea.de/10.1594/PANGAEA.911771 Spatial and annual patterns of grain size and organic matter content in an intertidal area, St. Lawrence Estuary, Canada DIF 9.4 2020-08-10 2026-04-30