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Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Relative eelgrass leaf elongation and microalgal epiphyte load on eelgrass leaf measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931114

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Abstract:
We evaluated single and interactive effects of density reduction of Zostera marina L., a habitat-forming species, shading, and sediment nutrient enrichment on the response of eelgrass relative leaf elongation (RLE) and of microalgal epiphyte load on leaves. REL was evaluated once, as a proxy for growth, using five shoots per plot that were each marked with a reference hole at the top of the sheath using a pushpin marked at the end of Period T1 (two weeks after reducing eelgrass density and at the same time than adding nutrients sediment enrichment and shades). After 19 days, we collected the shoots and brought them back to the lab where leaf elongation was measured as the displacement of the mark relative to the reference mark on the oldest nongrowing leaf (Olesen & Sand-Jensen 1994). Total leaf elongation was then divided by sheath length and the number of days of elongation. We estimated the epiphyte (microalgae) load on eelgrass by scraping the leaves of one randomly selected shoot; we then filtered the water containing the epiphytes on GF/F filters that were then kept wrapped in aluminum foil at -80 °C until analysis. Epiphyte load was assessed using chlorophyll extraction with 90% acetone, following Parsons et al. (1984). Calculated chlorophyll weight was then divided by shoot dry weight.
Keyword(s):
Abundance; Eelgrass; intertidal; invertebrates; multiple stress; stress interaction
Related to:
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Abundances of intertidal macro-species measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.930967
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Abundances of intertidal macro-species measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931116
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Biomass (dry weight) of epiphytic microalgae measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931118
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Eelgrass biomass (dry weight) distribution measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931120
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Eelgrass biomass (dry weight) measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931117
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Eelgrass shoot density measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931119
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Macro-species taxonomy measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931113
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Multiple stressors and disturbance effects on eelgrass and epifaunal macroinvertebrate assemblage structure. Marine Ecology Progress Series, 657, 93-108, https://doi.org/10.3354/meps13546
Cimon, Stéphanie; Deslauriers, Annie; Cusson, Mathieu (2021): Soluble sugar and starch content in eelgrass leaves and root-rhizomes measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931121
Further details:
Olesen, Birgit; Sand-Jensen, K (1994): Patch dynamics of eelgrass Zostera marina. Marine Ecology Progress Series, 106, 147-156, https://doi.org/10.3354/meps106147
Parsons, T R; Maita, Y; Lalli, C M (1984): A manual of chemical and biological methods for seawater analysis. Pergamon Press, Oxford, 173 pp
Coverage:
Latitude: 49.133300 * Longitude: -67.233300
Date/Time Start: 2015-08-05T00:00:00 * Date/Time End: 2015-08-06T00:00:00
Event(s):
StLawrence_Estuary * Latitude: 49.133300 * Longitude: -67.233300 * Location: Quebec, Canada * Method/Device: Multiple investigations (MULT)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 DATE/TIMEDate/TimeCimon, StéphanieGeocode
2 Sample code/labelSample labelCimon, Stéphanie
3 DensityDensityCimon, StéphanieAmbient eelgrass shoot density (Ambient, D-) or 80% reduced eelgrass shoot density (Reduced, D+)
4 NutrientNutrientCimon, StéphanieNo nutrient addition (Natural, N-) or nutrient enrichment (Enriched, N+, N:P:K = 15:3:3, 75 g N m−2)
5 ShadingShadeCimon, StéphanieNatural light (No, S-) or light reduced by ~68% with fiberglass screens between period T1 and period T2 (Yes, S+)
6 TreatmentTreatCimon, StéphanieD: Density, N: Nutrient, S: Shading
7 PeriodPeriodCimon, Stéphanie
8 PlotPlotCimon, Stéphanie
9 Leaf growth rate, relativeLeaf growth rate rel1/dayCimon, StéphanieTotal elongation of leaves using a push-pin hole divided by sheath lenght and number of days of elongation
10 Chlorophyll aChl aµg/gCimon, StéphanieChlorophyll a analysis (Parsons et al., 1984, Pergamon Press, Oxford)per g shoot biomass
11 Chlorophyll bChl bµg/gCimon, StéphanieChlorophyll a analysis (Parsons et al., 1984, Pergamon Press, Oxford)per g shoot biomass
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
400 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Date/Time		2 
Sample label		3 
Density		4 
Nutrient		5 
Shade		6 
Treat		7 
Period		8 
Plot		9 
Leaf growth rate rel [1/day]		10 
Chl a [µg/g]		11 
Chl b [µg/g]
2015-08-06T2P1AmbientNaturalYesD-N-S+T2P10.31226.8035.811
2015-08-06T2P2ReducedNaturalYesD+N-S+T2P20.27223.390-1.141
2015-08-06T2P3ReducedNaturalYesD+N-S+T2P30.34747.91210.893
2015-08-05T2P4AmbientNaturalNoD-N-S-T2P40.32515.5691.307
2015-08-05T2P5AmbientNaturalYesD-N-S+T2P50.26120.8662.223
2015-08-06T2P6AmbientEnrichedYesD-N+S+T2P60.32353.78114.621
2015-08-06T2P7ReducedNaturalNoD+N-S-T2P70.44712.432-0.976
2015-08-05T2P8AmbientEnrichedNoD-N+S-T2P80.42214.6180.649
2015-08-05T2P9ReducedNaturalNoD+N-S-T2P90.43323.7807.090
2015-08-06T2P10ReducedEnrichedYesD+N+S+T2P100.29764.12416.089
2015-08-05T2P11AmbientNaturalNoD-N-S-T2P110.36720.560-0.425
2015-08-06T2P12ReducedEnrichedYesD+N+S+T2P120.38345.3383.490
2015-08-06T2P13AmbientEnrichedYesD-N+S+T2P130.25467.03020.445
2015-08-05T2P14AmbientNaturalYesD-N-S+T2P140.26950.52814.729
2015-08-06T2P15AmbientEnrichedNoD-N+S-T2P150.39420.1503.157
2015-08-06T2P16AmbientNaturalNoD-N-S-T2P160.27415.7355.286
2015-08-05T2P17ReducedEnrichedNoD+N+S-T2P170.44514.7621.173
2015-08-05T2P18ReducedNaturalNoD+N-S-T2P180.34011.9863.470
2015-08-05T2P19ReducedEnrichedNoD+N+S-T2P190.41534.8038.052
2015-08-05T2P20ReducedNaturalYesD+N-S+T2P200.30124.6481.215
2015-08-05T2P21AmbientEnrichedYesD-N+S+T2P210.26637.12812.338
2015-08-05T2P22ReducedEnrichedNoD+N+S-T2P220.39827.91510.014
2015-08-05T2P23AmbientEnrichedYesD-N+S+T2P230.25333.76810.017
2015-08-05T2P24ReducedNaturalYesD+N-S+T2P240.32839.2797.577
2015-08-05T2P25AmbientEnrichedNoD-N+S-T2P250.33512.192-2.444
2015-08-05T2P26ReducedNaturalYesD+N-S+T2P260.37221.1010.668
2015-08-05T2P27ReducedEnrichedYesD+N+S+T2P270.36922.0564.338
2015-08-05T2P28ReducedNaturalNoD+N-S-T2P280.45417.6995.967
2015-08-05T2P29AmbientNaturalNoD-N-S-T2P290.36512.5880.052
2015-08-05T2P30ReducedEnrichedYesD+N+S+T2P300.38521.9216.618
2015-08-05T2P31AmbientNaturalNoD-N-S-T2P310.35315.6743.782
2015-08-05T2P32AmbientNaturalYesD-N-S+T2P320.34759.83923.587
2015-08-06T2P33AmbientNaturalYesD-N-S+T2P330.29117.1743.436
2015-08-06T2P34AmbientEnrichedNoD-N+S-T2P340.28230.2731.895
2015-08-06T2P35ReducedEnrichedYesD+N+S+T2P350.38748.50211.911
2015-08-06T2P36ReducedEnrichedNoD+N+S-T2P360.37545.02118.008
2015-08-06T2P37AmbientEnrichedYesD-N+S+T2P370.23426.8629.593
2015-08-05T2P38ReducedEnrichedNoD+N+S-T2P380.4146.3750.467
2015-08-05T2P39AmbientEnrichedNoD-N+S-T2P390.37623.1317.302
2015-08-05T2P40ReducedNaturalNoD+N-S-T2P400.37520.8454.464