Fine- to basin-scale distributions of Calanus finmarchicus and its predators in three deep basins of the Gulf of Maine during December 1998 and 1999 from Video Plankton Recorder (VPR) data
Notice bibliographique
Résumé
The calanoid copepod Calanus finmarchicus is broadly distributed in the North Atlantic, where it dominates the spring zooplankton biomass of shelf ecosystems. Calanus finmarchicus diapauses in the deep basins of the Gulf of Maine (GOM) during late-summer through early-winter. During diapause, predators that co-occur in regions of high copepod abundance may reduce survivorship through predation. Consequently it is important to measure the distribution patterns of C. finmarchicus and its predators. Two cruises were carried out during December of 1998 and 1999 in the GOM. Video Plankton Recorder (VPR) data collected in Wilkinson, Jordan and Georges Basins were used to describe the fine- to basin-scale distributions of C. finmarchicus and its predators. The locations of individual zooplanktors were mapped by towyoing a Video Plankton Recorder (VPR), mounted on the towed-body BIOMAPER-II, across the basins. Volumetric distribution patterns were estimated by interpolated abundance data using 3D Kriging. The abundance of C. finmarchicus was lower in December 1998 than in December 1999. This difference is discussed in terms of the spatial distributions and abundances of cnidarian, ctenophore, and crustacean predators. Gelatinous plankton were more abundant during December 1998 than in December 1999. Gelatinous plankton (siphonophores, ctenophores and medusae) were identified as the most aggressive taxa preying on C. finmarchicus. An inverse spatial pattern between C. finmarchicus and predators was observed in all three deep basins during December 1998, suggesting depletion of C. finmarchicus through predation. Water temperatures were generally cooler and fresher during December 1998 and warmer and saltier during December 1999. This hydrological regime changes caused by the shift between the Labrador Subarctic Slope Water and the Slope Water, respectively, seemed to affect both, C. finmarchicus and its invertebrate predators. During December 1998, C. finmarchicus was broadly distributed (0-200 m) in the water column probably due to broader distribution of cooler temperatures. During December 1999 C. finmarchicus was found below 150 m, where cooler temperatures dominated. The low C. finmarchicus abundances observed during December 1998 were possibly caused by the combined action of predation and advection losses since diapausing populations above sill depth (~200 m) are likely advected out of the system.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».