Are fat bankers losing their liquid assets? Changes in lipid accumulation for a nectar‐feeding migratory moth
Notice bibliographique
Résumé
Abstract Lepidoptera that seasonally migrate to high elevation sites may be especially vulnerable to climate change. Alpine and montane ecosystems are warming at accelerated rates, and increased temperatures can act directly on insect physiology, development and distributions. In addition, changing patterns of temperature and precipitation can impact critical food resources for migratory butterflies and moths. For example, many migratory Lepidoptera accumulate lipids from nectar‐feeding as adults, but hot or dry conditions can shorten the duration of flowering or reduce flower abundance. Our objective was to evaluate how nectar resources and lipid accumulation in army cutworm moths ( Euxoa auxiliaris ) have changed since originally evaluated in 1978–1980. Army cutworm moths are a lipid‐accumulating migratory insect of Western North America. Larvae and pupae overwinter in the central plains, after which adults migrate to high elevations in the early summer. Adults then feed on nectar and accumulate lipids to support the energetic demands of migration back to the plains, where their larvae are sporadic pests. We replicated plant and moth sampling in the alpine tundra at Pennsylvania Mountain, Colorado USA. To assess changes in nectar resources, we resurveyed three white‐flowered alpine plants in five vegetation plots in 2022 and 2023. This allowed us to compare contemporary flower abundance (maximum flowers·m −2 ) and phenology to the original surveys of these plots in 1977–1980. To assess changes in moth abundance, phenology and lipid contents, we placed UV‐light traps at four sites in the alpine tundra in June and July of 2021–2023, repeating an earlier trapping study performed in 1978–1980. We found significant declines in the abundance of three white‐flowered alpine plants since 1977–1980 but no changes in the timing of end‐of‐flowering. Reduced flower abundance is consistent with warmer and drier conditions in the Rocky Mountains over this time frame. For army cutworm moths, we did not detect changes in moth abundance (maximum moths·trap −2 ), but we found support for phenological differences between past and contemporary study periods. As with other alpine insects, army cutworm moths appear to have accelerated their phenology, with moth abundance decreasing by earlier trapping dates. We also observed declines in lipid contents of moths across trapping dates in June and July, while in the past, army cutworm moths gained lipids during this timeframe. Our results suggest that summer nectar foraging at high elevation sites in the Rocky Mountains no longer supports lipid accumulation by army cutworm moths. Because lipid reserves are critical for migration and reproduction, this change could impact army cutworm moth abundance and ultimately their broader roles in ecosystems and as agricultural pests.
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) | 0,000 | 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 ».