Floristic composition and stand structure of mangrove forests with varying vegetation conditions in Sungai Apit, Siak, Riau, Indonesia

Abstract. Kasihiw P, Bawole R, Marwa J, Murdjoko A, Wihyawari A, Heipon Y, Cabuy RL, Benu NMH, Hematang F. 2023. Floristic richness and diversity of Bintuni mangrove, Bird's Head Peninsula, West Papua, Indonesia. Biodiversitas 24: 2887-2897. Mangrove ecosystems play an important role in the functions of coastal protection, fish and other living-organism habitats, carbon storage, and the livelihood of local people. Yet, mangrove forests generally face ecological threats like anthropogenic pressures. However, fewer studies were carried out in this area, so this research aimed to reveal the vegetation diversity and richness in Bintuni, not only the true mangroves but also the mangroves associates with three different conditions, namely sandy areas called protection forests, disturbed forests called production forests, and delta called nature reserve. The results showed that species vegetation in the Bintuni Mangrove could be differentiated as true mangroves (29.82%) and mangrove associates (70.18%) of the total species richness of mangrove vegetation where in terms of taxonomic composition, the three forests encompassed 25 families, 47 genera, and 57 species clustered into 9 lifeforms. Then, the vegetation diversity and richness were highest in the nature reserve, and 34 (59.65% of total species number) species of vegetation in common share in three forest types. Consequently, frequent checking of vegetation richness is important since the Bintuni mangrove does not seem to have a significant threat like massive conversion of mangrove.

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Floristic richness and diversity of Bintuni mangrove, Bird's Head Peninsula, West Papua, Indonesia

KASIHIW,

BAWOLE,

MARWA

et al. 2023

“…Such was the case due to the dominance of R. apiculata in all sampling locations. Species evenness values range from 0 to 1 and are categorized as uneven (0.00-0.40), moderate evenness (0.41-0.60), and high evenness (0.61-1.00) (Fatonah et al 2021). A value equal to or close to 1 means the species are evenly distributed.…”

Section: Diversity Of Mangrovesmentioning

confidence: 99%

“…Information on stand characteristics is relevant to management as they relate to forest functions and conditions, such as degradation stage, recovery time, and carbon storage (Ali 2019;Fatonah et al 2021). In Davao Region, particularly on the coasts of Davao Gulf, floristic studies of mangroves were already conducted in the provinces of Davao Oriental (Pototan et al 2021), Davao del Norte (Galerio and Martinez 2009;Pototan et al 2017;Alimbon and Manseguiao 2021b), and Davao del Sur (Jumawan et al 2015;Cardillo and Novero 2018).…”

Section: Introductionmentioning

confidence: 99%

Floristic composition, structure, and diversity of mangroves in the coastal areas of Mabini, Davao de Oro, Philippines

MANUAL¹,

GABATO²,

JETUYA³

et al. 2022

Abstract. Manual AMB, Gabato NAS, Jetuya QB, Alimbon JA. 2022. Floristic composition, structure, and diversity of mangroves in the coastal areas of Mabini, Davao de Oro, Philippines. Biodiversitas 23: 4887-4893. Biodiversity and stand structure assessments of mangrove communities are important for their management and conservation. However, this aspect of mangrove ecology in the Davao Gulf is not yet fully explored, particularly in the coastal areas of Mabini, Davao de Oro, Philippines, despite being proclaimed as a protected area. Hence, this study assessed the species composition, structure and diversity of mangroves in the coastal areas of Mabini, Davao de Oro, Philippines. Using the belt transect method, 35 plots with 10 m x 10 m each were established and surveyed. Results revealed that the area is home to eight species belonging to six genera and five families. One vulnerable species, Avicennia rumphiana, was recorded on the study site. Of the identified species, Rhizophora apiculata was the most important species, with an importance value index of 144.41 %. Meanwhile, the surveyed mangrove communities had a mean diameter at breast height of 10.96 cm, a basal area of 27.93 m² ha?¹, and a mean density of 4192 stems ha?¹. Diversity analysis indicated that the sampled sites had low species biodiversity (H’ = 1.098), low species richness (R = 0.9601), and less even species distribution (J = 0.5280). These results add to the existing knowledge about mangrove communities in Davao Gulf. More importantly, they serve as important baseline information relevant to the management, protection, and conservation of mangroves within the Mabini Protected Landscape and Seascape.

“…The natural type has the highest values for tree density, mean diameter, and basal area. Conversely, rehabilitated and degraded forests exhibit a decrease in these three parameters (Fatonah et al 2021). The tree density in Mengkapan Village, Sungai Apit, Siak constitutes the sparse to dense category (Efriyeldi et al 2020), with carbon sequestration measured at 113.18 tons/ha, and the highest contribution coming from Xylocarpus granatum (Hamidy 2020).…”

Section: Introductionmentioning

confidence: 99%

Biomass, carbon stock and sequestration in various conditions of mangrove forests in Sungai Apit, Siak, Riau, Indonesia

FATONAH,

HAMIDY,

MULYADI

et al. 2023

Abstract. Fatonah S, Hamidy R, Mulyadi A, Efriyeldi. 2023. Biomass, carbon stock and sequestration in various conditions of mangrove forests in Sungai Apit, Siak, Riau, Indonesia. Biodiversitas 24: 5837-5846. The value of aboveground carbon is influenced by differences in conditions of the mangrove. Therefore, this study aimed to estimate biomass, as well as carbon stock and sequestration in various mangrove forests within Sungai Apit Siak, including natural, rehabilitated, and degraded forests. The Line Transect Plot method was used for sampling. Aboveground biomass was determined using an allometric equation based on mangrove stem diameter. Stem diameter measurements were taken from mangrove vegetation in three forest conditions across three villages in Sungai Apit, Siak. The findings revealed that natural forests contained higher values of biomass, carbon stock, and sequestration at 256, 128, and 470 tons/ha, respectively, compared to rehabilitated and degraded forests. The variability in these parameters across different mangrove forests was influenced by stands characteristics, specifically basal area and mean tree diameter, which were associated with the age of mangrove vegetation and recovery duration. Notably, Rhizophora mucronata, Sonneratia caseolaris, and Avicennia alba exhibited the highest carbon sequestration. These results highlighted that Sungai Apit mangrove forests store a relatively high carbon stock, emphasizing the importance of implementing proper conservation and management measures to ensure sustainability.