An investigation into the influences of catchment \nnutrient export and climatic effects on the trophic \nstatus of a small inter-drumlin lake, Milltown Lake, \nCo. Monaghan.
Notice bibliographique
Résumé
Eutrophication is an on-going problem in lakes that are nutrient enriched. In addition, lakes are now subject to changes in the local weather, which is linked to climate change. Understanding the way that climate affects nutrient export and changes within lakes is critical if lakes are to be improved and protected in the future. This thesis has examined this by looking at number of different factors, which include: (1) the role of nutrients exported from the surrounding landscape and how agricultural mitigation measures (e.g. comparing a fenced stream with a vegetative buffer strips to an unfenced stream which had no fencing installed), can be used to decrease nutrient loss from the land to water, (2) examining local climatic factors and their role, either directly or indirectly, in influencing lake biota, particularly in lakes where nutrient supplies are not limiting, and finally (3) determining how phytoplankton richness is influenced by changes in water column stability during the onset of spring stratification. The study within the catchment found net retention of nutrients (TP and TN) occurred during the Grazing season (cattle grazing in the field) in the fenced stream reach, while during the Open season (slurry spreading permitted, but cattle still indoors) the reverse was seen for TP only, suggesting that different processes were controlling export of nutrients in both the fenced and unfenced reach. Despite the net TP release in the Open season, the estimated TP and TN loads on an annual basis were lower for the fenced stream, compared to that of the unfenced stream. Regarding local climatic factors, results showed that in the epilimnion of Milltown Lake, surface nutrient loading (mainly P) and light were more significant than internal lake nutrient resuspension, while N availability was more influential in controlling the standing crop of phytoplankton at the lower lake depths. In general, catchment management strategies are devised to reduce nutrient loads from the surrounding catchment in order to protect and improve catchment waterbodies, which this study has shown to be achieved through the implementation of streamside fencing with a vegetative buffer strip. However, this study has also shown that more attention is needed in understanding the internal lake sediment nutrient release, should catchment load be reduced, it is this legacy source of nutrients that is likely to play a significant role in determining a lake’s trophic status.
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 machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,001 | 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) | 0,002 | 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 source (Gemma direct ou Codex distillé), 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 ».