Abstract. Alimbon JA, Manseguiao MRS. 2021. Species composition, stand characteristics, aboveground biomass, and carbon stock of mangroves in Panabo Mangrove Park, Philippines. Biodiversitas 22: 3130-3137. Mangrove ecosystems have been recognized for their roles in climate change mitigation through their carbon sequestration capacity. However, information on the ecology and carbon stock of mangroves is limited. Thus, this study assessed the species composition, stand characteristics, aboveground biomass, and carbon stock of mangroves in Panabo Mangrove Park, Panabo City, Davao del Norte, Philippines. Data for vegetation analysis and biodiversity assessment were collected using transect line plots method. Meanwhile, aboveground biomass estimation was conducted using nondestructive method. Twenty plots with size of 10 m x 10 m each were established to account for the stand characteristics and aboveground biomass of mangroves. Species composition data identified five species from four families. Avicennia marina was the most important species with an importance value of 153.33%. Stand structure analysis revealed a basal area of 14.65 m² ha?¹ and a mean density of 11835 stems ha?¹. Biodiversity indices indicated very low species diversity (H’ = 1.027), low species richness (R = 0.5148) and less even distribution of species (J = 0.6383). Using allometric equation, the aboveground biomass was 77.45 Mg ha?¹ with an estimated stored carbon of 37.18 Mg ha?¹ and sequestration potential of 136.44 Mg CO?ha?¹. These baseline data demonstrate that the area can store and sequester potential amounts of carbon and carbon dioxide, respectively, despite the low diversity.

Abstract. Alimbon JA, Manseguiao MRS. 2021. Community knowledge and utilization of mangroves in Panabo Mangrove Park, Panabo City, Davao del Norte, Philippines. Intl J Bonorowo Wetlands 11: 51-57. Awareness of community knowledge and utilization patterns of mangrove ecosystems and their services is integral to conservation and management. However, this aspect remains to be less explored, especially in the Philippines. Hence, this study assessed the community knowledge and utilization of mangroves in Panabo Mangrove Park, Panabo City, Davao del Norte Philippines, using a survey research design. Through a simple random sampling procedure, 154 residents living near the area were surveyed using a questionnaire. Data were analyzed using frequency and percentages. Results revealed that the majority were knowledgeable of the existence and the services of mangroves except for their medicinal uses. It was also found out that many respondents have less to no knowledge of the different species of mangroves. Further, most respondents reported that they used the mangrove ecosystem as a food source on varying frequencies but never utilized it for other purposes such as fuelwood, medicine, dyeing agent, construction materials, fishing poles, household furniture, and other items.

Abstract-This study was conducted to describe variability in 3 populations of a coconut pest, Plesispareichei landmark-based geometric morphometric analysis of inner wing shapes. A total of 21 landmarks were used to represent dimensions in the left and right wings. Analysis of Variance, coordinate mapping, relative warp, Euclidean Distance Matrix and Cluster Analyses were used to analyze these landmarks. Results showed that significant variations were observed among populations. Variation in the left wing is mainly seen along the proximal landmark points but is variable in the right wing which may be an indication of asymmetry. Cluster analysis showed wing shape variations between populations indicating population differentiation in the pest. Distance was not a factor which may indicate differences in genetic structure between populations.

Plants have differential expression of genes despite being propagated through cloning as in the case of mango. This study aimed to determine the effect of intraspecific variation in the host mangoes to the wing shape of the mango leafhopper, Idioscopus clypealis. Leafhopper populations were collected from four different orchards from individual trees. Wings were dissected, imaged and analyzed using multivariate analysis of variance, thin plate spline analysis and relative warp analysis. Results showed significant variation across all sampled trees in each geographic location regardless of farm management methods in the wing shape of the leafhopper. This variation is observed between genders and between trees in an orchard. Results also show that there is intraspecific variation in each host tree even in unsprayed populations and organic pesticide use. High adaptability to host defense and pesticides evidenced by wing variation may be key to persistence in this high value crop despite natural and synthetic control measures.