Flora Assessment and Total Carbohydrate Analysis on Flower Nectars of Mangrove Species in Leyte Gulf, Maqueda Bay, and Matarinao Bay, Philippines: Potential Ecosystems for Apiculture


by: Monique Clarice Q. Cañete, Niña Mae C. Labitao, Marion Nicole M. Pacheco, Nicole C. Regorosa,
Izabelle Trina M. Vivero, Maria Elisa B. Gerona


Tropical mangrove ecosystems are known for high productivity and extensive ecosystem services. While there has been extensive research on floristics and faunistics in mangroves, there has been limited information in community structure and carbohydrate analysis of flower nectars, which can be explored for possible apiculture. The study was conducted to assess community structure, species diversity, and total carbohydrate (TC) analysis of floral nectars in 15 mangrove sites in Maqueda Bay, Matarinao Bay, and Leyte Gulf in Samar, Eastern Samar, and Leyte, respectively. A total of 15 sites were assessed using the transect line-plot method. A total of 23 mangrove species were identified from the 15 sites (2 dominant, 17 minor, and 2 associated species) belonging to 12 families, including 21 true mangroves and 2 mangrove associates. Leyte Gulf and Maqueda Bay have 17 species, while Matarinao Bay has 13 species. In general, the mangrove sites are dominated by Rhizophora apiculata and Sonneratia alba. Rehabilitated sites are dominantly planted with Rhizophora. In contrast, natural mangrove stands are composed of mixed species of Aegiceras, Avicennia, Brugueira, Rhizophora, Sonneratia, and Xylocarpus. Across the three habitats, S. alba showed much higher nectar TC (mg) per flower than R. apiculate ranging from 7.45 – 0.02 mg/ flower. These data suggest that sites dominated with S. alba has good prospects for apiculture, considering the total carbohydrate analysis, over the popularly planted R. apiculata.

Keywords: apiculture, mangroves, total carbohydrates