Quantitative comparison of levels of organic wastes from four major sources at four scales along the Newfoundland coastline
Notice bibliographique
Résumé
This study compared the levels of organic wastes released along the Newfoundland coastline From four different sources during the period 1992-1996. These sources include offal from fish plants, domestic sewage, aquaculture wastes (wasted feed and faeces) and sawmill wastes (bark, shavings, wood chips, slabs, sawdust). The total amount of organic wastes entering coastal waters had never been quantified before this study, and hence, comparisons of levels of wastes from different sources had not previously been made. The scattered information on sources of organic wastes was assembled in order to determine and compare the four major sources in Newfoundland. This study also determined whether spatial scale is a factor in determining the greatest and smallest sources of organic wastes released. The level of organic wastes released were quantified and compared at four scales along the Newfoundland coastline. Three hypotheses were addressed concern concerning the relative importance of the sources of the wastes: i) The level of organic wastes released from coastal sawmills is lower than that released from the other three sources. ii) At the spatial scale of the entire island the largest levels of organic wastes are from sewage, followed by fish plant offal, and finfish aquaculture. iii) The relative level of organic wastes released from sewage, aquaculture, and offal differs according to spatial scale. As the scale studied becomes smaller (from the entire island, to coastal regions, to fisheries statistical areas, to fisheries statistical sections) either of the three sources could be the major contributor of organic wastes. -- At the largest spatial scale examined, the entire island, offal was the largest contributor of organic wastes, followed by sewage and sawmill wastes, with aquaculture as the smallest contributor of wastes. The region of the island with the greatest amount released into the coastal waters was the Avalon Peninsula, while the Northern Peninsula had the least amount of wastes being released. Two interesting trends were found in this investigation. First, aquaculture wastes are increasing at a high, steady rate in Newfoundland at a very localized coastal scale. This was not evident for the other sources of wastes studied. Secondly, although the offal levels for the entire island only increased slightly over the period studied, the form of the released offal changed greatly since the moratorium on Atlantic cod in 1992. Currently, there is a predominance of inorganic shells being released, which are more resistant to degradation than the flesh and viscera of fish. -- The next smallest spatial scale, coastal region (the coastline was divided into five regions) showed the same results as the scale of the entire island. Offal was the largest contributor of organic wastes and aquaculture the smallest contributor. The two smallest spatial scales studied, fisheries statistical area (the coastline was divided into 14 areas) and fisheries statistical section (the areas were divided into 49 sections), showed variation within the two larger coastal scales. The results for the area and section scales corresponded with those for the region scale in that the places with the greatest levels of release (St John’s, Southern Shore, Conception Bay) were on the Avalon Peninsula, and the places with the lowest levels of release were on, or very near, the Northern Peninsula (Bonne Bay, Gros Morne Park area, Strait of Belle Isle area). Overall, most areas had offal as the greatest contributor and aquaculture as the smallest. However, the importance of spatial scale was evident from the increased variability in type and level of organic wastes released as the coastal scale examined became smaller. This was due to variation in the population and in level and type of industry between places along the coast
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 | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,002 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,002 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 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 ».