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Assessing Environmental Factors on the Growth and Distribution of Mangrove Seedlings Along the Bintuni Riverbank Area, Bintuni Bay, West Papua, Indonesia

Sraun Markus, Bawole Roni, Marwa Jonni, Sinery Anton Silas, Cabuy Reinardus Liborius

Journal of Ecological Engineering

2023

Vol. 24, nr 8

1--11

Bintuni Bay is considered one of the largest mangrove ecosystems in the world, and it has benefited a lot to local inhabitants and the surrounding ecosystem by underpinning and maintaining ecosystem balances. This study assesses various environmental factors that affect the flow of the Bintuni River and mangrove ecosystems as a result of potential degradation due to various anthropogenic activities and small-scale industries along the river. Several environmental parameters were collected, measured, and analyzed in the laboratory, while mangrove seedlings were measured and calculated at five different locations to obtain the importance value index (IVI). The results indicated slightly varied environmental parameters and concentrations at the five locations. However, there was no significant difference in the environmental parameters between the five different locations (p-value of 0.953 > 0.05, 95% of CI). Mangrove seedlings were distributed evenly along the five different locations which were indicated by the number of individuals (ind/ha). There was no significant correlation among these environmental parameters because of the low concentrations of chemical and biological compounds in the water. Moreover, mangroves can regenerate, grow, and exist even in extreme and unbalanced environmental niches.

Species Richness of Yapen Island for Sustainable Living Benefit in Papua, Indonesia

Sinery Anton Silas, Marwa Jonni, Aronggear Agustinus Berth, Rahawarin Yohanes Yosep, Mofu Wolfram Yahya, Cabuy Reinardus Liborius

Ecological Engineering & Environmental Technology

2021

Vol. 22, iss. 1

92--99

The objective of this study was to precisely identify the types of forest resources utilization in two local communities. All forest plants used were identified and classified based on their types and classes during data collection. Semi-structural interviews through questionnaires were undertaken to obtain daily information. The results showed that there were a total of 64 forest plant life forms and categories extracted for various reasons. Most of the subject forest plants were found in the surrounding lowland tropical forest, the dominant categories were monocotyledons followed by dicotyledons, pteridophytes, and thallophytes. A strong positive correlation was determined between the frequency of species use and the benefit value that was gained (0.6453), while a strong negative correlation was observed between the value of plant’s benefit and the difficulty of access to those plants (-0.2646). Frequency of use and the future prospect of forest plant availability (-0.1405) also showed a negative correlation.