Response of Typha x glauca to Phosphorus, Hydrology, and Land Use in Lake Ontario Coastal Wetlands
Notice bibliographique
Résumé
A combination of field sampling, a greenhouse growth experiment, and GIS was used to quantify the effects of phosphorus, hydroperiod, watershed land use, and wetland hydrogeomorphic classification on the invasive cattail Typha x glauca Godron across 18 Lake Ontario coastal wetlands. To determine T. x glauca density and frequency in coastal wetlands, vegetation was sampled in 1 - m2 quadrats along stratified random transects, each of which crossed three wetland vegetation zones when present ( submergent, emergent, and wet meadow). In each wetland, water samples were collected and shipped for laboratory analysis to determine total phosphorus concentrations in wetland waters. For each wetland, ESRI ArcGIS was used to determine its watershed area, watershed land use as croplands, and length of lotic surface waters. A greenhouse growth experiment using a full factorial random block design was used to investigate the effects of variable hydroperiod and phosphorus concentrations on T. x glauca biomass allocation. Multiple linear regressions revealed that frequency of occurrence of T. x glauca cannot be predicted by the individual and combined effects of wetland water mean total phosphorus (mg/L) or croplands in wetland watersheds (p = 0.345), However, these variables were predictors of increases in cattail density (p = 0.021). Increases in mean water total phosphorus concentrations can be predicted by the combined effect of wetland watershed croplands and total length of watershed lotic waters (p = 0.002), but individually, croplands were the only significant predictor (p = 0.001; lotic waters,p = 0.414). Wetland hydrogeomorphic classification did not predict cattail density (ANOVA, p = 0.389) or frequency (p = 0.665). Wetland mean total phosphorus concentrations increased from lacustrine to riverine wetland systems (p = 0.040) but there were no differences between riverine and barrier wetlands (p = 0.598) or between lacustrine and barrier wetlands (p = 0.169). A full factorial T. x glauca growth experiment with variable hydroperiods and phosphorus concentrations was performed over the course of eight weeks. As assessed by MANOVA, there was an increase in above- and below-ground biomass allocation for the simple main effects of hydroperiod (p < 0.000), phosphorus concentrations (p < 0.000), and their interaction (p < 0.000). Multiple pairwise interaction comparisons within block hydrology between nutrient treatments results revealed that as hydroperiod and phosphorus concentrations increased, the more pronounced the differences in their interaction became. Overall, results of this study demonstrated that increasing concentrations of phosphorus positively influenced cattail growth in a controlled setting as well as in Lake Ontario coastal wetlands. Although phosphorus positively influenced growth, hydrologic regime had the greatest influence on cattail growth and biomass allocation, with increased biomass as hydroperiod increased. Results could be used by Lake Ontario stakeholders or other land managers to craft policies that reduce phosphorus inputs into wetlands and manage hydrologic regimes in a manner that limits or reverses the spread of this invasive species.
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) | 0,001 | 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 ».