Notice bibliographique
Résumé
Abstract The Gully is a large shelf‐edge submarine canyon located on the eastern Scotian Shelf which has long been recognized as an area rich in marine life. This paper analyses the available nutrient (nitrate, silicate and phosphate) data for The Gully, including the new information collected since The Gully was designated a potential Marine Protected Area in 1998, and reports on nutrient climatology, nutrient transports and transport mechanisms, and surface nutrient distributions with a focus on how nutrient behaviour may or may not be different in The Gully than observed elsewhere on the Scotian Shelf. Seasonal cycles for nutrients in The Gully show the general patterns expected for nutrients in temperate coastal waters. The concentrations of all three nutrients in the surface layer (z ≤ 50 m) are relatively high in late fall and winter. Nitrate and silicate levels fall rapidly during the spring bloom and remain low during the summer and fall. Nitrate is more severely depleted than silicate. Phosphate levels are also lower in summer than in winter, but not depleted in summer, which is consistent with a nitrogen limited ecosystem. Attenuated versions of these seasonal cycles for the three nutrients are evident in the intermediate layer (50 < z ≤ 100 m), with substantial quantities of nutrients remaining in the summer. Little evidence of a seasonal cycle is seen in deeper waters (z > 100 m). These nutrient concentrations and seasonal cycles are similar to those found elsewhere on the shelf. A more detailed examination of nutrient concentrations in The Gully shows that higher nitrate, silicate and phosphate levels occur at the head of The Gully compared to the mouth, and on the Sable Bank side of The Gully compared to the Banquereau side. These observations are consistent with a trapping of nutrients associated with the counter‐clockwise circulation within The Gully, which could fuel more primary productivity in The Gully than on the adjacent shelf. Nutrient levels determined from surface samples collected at high frequency while survey vessels were underway showed anomalously high surface concentrations of nitrate and silicate that were consistent with the areas where the interaction of gully currents with the bottom topography at the head of The Gully and breaking internal waves along the north‐east edge of The Gully would enhance vertical mixing. Calculations of transports of nutrients through The Gully show that ∼5% of the external inputs of nitrate to the eastern Scotian Shelf are supplied through The Gully in winter, and ∼25% flow through The Gully in summer. Calculations based on these physical processes and the observed nutrient levels show that such mechanisms have the potential to increase production substantially in The Gully compared to other areas of the shelf.
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) | 0,003 | 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 ».