Concentrations de chlorophylle et de phéopigments en vrac et fractionnées par taille recueillies par Niskin Bottle, Colombie-Britannique, Canada (Recherche)
10.21966/q5vm-8797
Accès et utilisation
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Licence: Licence Creative Commons 4.0 Attribution
Limites: The utilized acidification method is sensitive to interference by high concentrations of chlorophyll c and b. High chlorophyll c concentrations can cause a slight overestimation of chlorophyll a and an underestimation of phaeopigments, which can result in negative phaeopigment concentrations. High chlorophyll b concentrations can result in underestimations of chlorophyll a and overestimations of phaeopigments. When chlorophyll b is high relative to chlorophyll a, chlorophyll a can be underestimated by as much as 2.5 fold. For more details see Welschmeyer et al. (1994). These two types of interference likely had an influence on the published chlorophyll and phaeopigment dataset. Notably, comparison with HPLC has shown that stations in the Quadra Island region often experience conditions where chlorophyll b is present in high concentrations and is high relative to chlorophyll a. The acidification method used to analyze the Hakai Institute dataset has been shown to highly overestimate phaeopigment concentrations based on comparison to concentrations determined by HPLC (Trees et al., 2003). Care should be used when interpreting the published phaeopigment concentrations. Prior to 2021, samples that exceeded the manufacturer specified instrument sensitivity range were not diluted to bring their concentrations within the specified range. Samples run above the instrument sensitivity range may have underestimated chlorophyll concentrations due to the blockage of light passing through the sample and a corresponding reduction of fluorescence output (see Turner Trilogy user manual for complete description). As a result these samples were removed and the dataset lacks many concentrations from phytoplankton bloom events. Comparison with matching HPLC derived chlorophyll a suggests that the affected samples may be useable, but further analysis is required. These data can be shared upon request and are available in the provisional dataset. |
Données et ressources
Citation
Related Works
Étendue du jeu de données
Dates
| Date(s) de référence des métadonnées | July 12, 2024 (Publication) September 08, 2026 (Revision) |
|---|---|
| Date(s) de référence des données | April 14, 2017 (Création) July 11, 2024 (Publication) |
| Fréquence de mise à jour | Au besoin |
Contacts
- Affiliation
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Hakai Institute
- Rôle
- Distributeur
- Propriétaire
- Éditeur
- Nom
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Del Bel Belluz, Justin
- Affiliation
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Hakai Institute
- Courriel
- justin.belluz@hakai.org
- Rôle
- Auteur
- Dépositaire
- Initiateur
- Point de contact
- Chercheur principal
- Contributeur
- Nom
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Bedard, Kimberly
- Affiliation
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Hakai Institute
- Courriel
- kimberly.bedard@hakai.org
- Rôle
- Auteur
- Point de contact
- transformateur
- Contributeur
- Nom
-
Jordison, Drew
- Affiliation
-
Hakai Institute
- Courriel
- drew.jordison@hakai.org
- Rôle
- Dépositaire
- Point de contact
- transformateur
- Contributeur
- Nom
- Fedje, Bryn
- Affiliation
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Hakai Institute
- Courriel
- bryn.fedje@hakai.org
- Rôle
- transformateur
- Contributeur
- Affiliation
-
Tula Foundation
- Rôle
- Fondateur
Info additionnelle
| Champ | Valeur |
|---|---|
| Variables océaniques | Autre |
| Portée | Jeu de données |
| Statut | En cours |
| Topic Category | oceans |
| Note de maintenance | Generated from https://hakaiinstitute.github.io/hakai-metadata-entry-form#/en/hakai/7U7b8oPpeTN6gjvXlUCTGJr5pga2/-MadZvZJ4ZeikpCgRcV8 |
| Étendue spatiale | { "coordinates": [ [ [ -128.5, 52.27 ], [ -127.4, 52.21 ], [ -127.2, 51.66 ], [ -125.6, 51.13 ], [ -124.8, 50.96 ], [ -124.1, 50.43 ], [ -124.7, 49.98 ], [ -124.9, 49.8 ], [ -126.7, 50.45 ], [ -128.1, 51.37 ], [ -128.4, 51.69 ], [ -128.5, 52.27 ] ] ], "type": "Polygon" } |
| Latitude limite Nord | 49.8 |
| Latitude limite Sud | 52.27 |
| Longitude limite Est | -124.1 |
| Longitude limite Ouest | -128.5 |
| Étendue temporelle |
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| Étendue verticale |
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| Langue par défaut | Anglais |
| Identifiant de citation |
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| Projects |
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| Included in Data Catalogue |
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