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Scientific diagram showing the ecological relationship between beavers and dragonflies, detailing beaver's role in creating ponds and dragonflies' life cycle within those habitats.

Scientific diagram showing the ecological relationship between beavers and dragonflies, detailing beaver's role in creating ponds and dragonflies' life cycle within those habitats.
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🦫🦋 Schéma conceptuel – Castors et Odonates (version finale) 1. Organisation générale Schéma horizontal, en 3 grands blocs reliés par des flèches → (cause → effets → réponses biologiques). 🦫 Bloc 1 – Castor (Castor canadensis / C. fiber) Silhouette de castor + barrage Texte associé : Ingénieur d’écosystème Construction de barrages Création d’étangs ➡️ Flèche vers le bloc 2 : « Modification hydrologique » 🌿 Bloc 2 – Étangs de castors / Milieux lentiques Illustrations : Étang forestier Zones peu profondes Végétation aquatique et rivulaire Texte structuré : Eaux calmes (lenticité) Stabilité hydrique Forte hétérogénéité d’habitats Persistance même après abandon ➡️ Flèches multiples vers le bloc 3 🦋 Bloc 3 – Odonates (cycle de vie) Divisé en 3 sous‑parties, avec dessins biologiquement corrects. a) Ponte Femelle anisoptère/zygoptère Ponte sur végétation aquatique ou eau libre Texte : Sites de ponte favorisés Végétation émergente 📎 Référence intégrée discrètement : Savard 2013 – Le Naturaliste canadien b) Développement larvaire (⚠️ terme corrigé) Larve d’anisoptère réaliste : Corps trapu Masque préhensile visible Pas de branchies caudales (contrairement aux zygoptères) Substrat vaseux + végétation Texte : Développement larvaire Ressources trophiques abondantes Protection contre les crues c) Émergence et adultes Exuvie sur tige Imago posé à proximité de l’étang Texte : Succès d’émergence élevé Abondance et diversité accrues 📚 Encadré références (en bas du schéma) Petit See more

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