Carex aquatilis as a pioneer species for boreal wetland reclamation in Northern Alberta
Notice bibliographique
Résumé
Exploration and extraction activities in the Alberta Oil Sands region have degraded thousands of hectares of land, about 40 % of which were once covered by peatlands. To date, there is very little information regarding the reclamation of peatlands, and even less related to their reclamation after oil sands disturbances. The results of this study will be used to develop protocols for the reclamation of peatlands after disturbance due to oil sands exploration and extraction operations in the Alberta Oil Sands region. Carex aquatilis is considered to be an ideal candidate species for initiating reclamation because it is a common pioneer species of disturbed landscapes, and has been shown to have a wide range of tolerances for several environmental factors in other areas of its overall distribution. The results of this study showed even wider ranges of tolerance than previous studies have reported, and did so using an ecological field study, a greenhouse propagation study, and a greenhouse Na+ tolerance study. A field study used vegetation surveys and environmental data to determine that Carex aquatilis is abundant in several wetland types and is not strongly associated with any of the species with which it was commonly found. In addition, C. aquatilis also was present across wide ranges of environmental variables including pH, conductivity, shade, water depth, Na+ concentration of surface water and percent organic carbon content of the substrate. These wide ranges of tolerance should allow C. aquatilis to establish after many types of disturbance. A greenhouse propagation study tested for population differences in percent germination after four stratification treatments, three stratification durations and four germination treatments. The overall best stratification treatment was to store seeds moist at 4°C for 30 days. The most effective germination treatment across all treatments was to plant seeds just below the surface of the substrate with the water level maintained at 1cm below the substrate surface. Only 9% of all sown seeds germinated. There were differences in germination rates between populations, although it is unknown whether these differences were due to differences in viability, timing of seed maturation, stratification requirements or germination requirements. A greenhouse Na+ tolerance experiment tested for differences in Na+ tolerance between four populations and two age classes to assess the efficacy of C. aquatilis as a pioneer species after oil sands surface mining disturbance. Five Na+ concentrations ranging from 5 to 2000 mg L-1 were tested. Plants showed no differences in Na+ tolerance between populations, but younger plants were more susceptible to damage from Na+ stress than older plants so it is recommended that older plants are used to initiate reclamation. It is also recommended that Na+ be managed on surface mine reclamations so that it is below 500 mg L-1.
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 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,003 | 0,001 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| 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 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 ».