CD Skripsi
Modifikasi Permukaan Tanah Oleh Fauna Perongga Dan Dampaknya Terhadap Sebaran Anakan Mangrove Di Wilayah Kabupaten Bengkalis, Riau
The soil surface beneath mangroves is never flat, especially in the back zone. The presence of burrowing fauna such as mud lobsters (Thalassina anomala) can modify the soil surface through bioturbation processes, resulting in the formation of mounds or protrusions, as well as depressions. These modifications can influence water retention and flow. Consequently, they are also suspected to affect the distribution of mangrove seedlings. This study aims to analyze the characteristics of soil surface topography modified by mud lobster mounds and its influence on seedling distribution patterns. Field observations were conducted in Bengkalis Regency, Riau Province. The focus of observation was on 5 m x 5 m plots, each divided into 25 subplots of 1 m x 1 m. All seedlings within each plot were recorded (species and number of individuals). Seedling distribution was categorized into three zones: mound tops, mound slopes, and waterlogged valleys between mounds. The results of the Chi-square (Χ²) analysis showed that there were differences in the seedling distribution of Rhizophora apiculata (Χ² = 4.27; p > 0.05) and Bruguiera gymnorhyza (Χ² = 6.95; p < 0.05) among the mound tops, slopes, and depressions. This indicates that the distribution of R. apiculata seedlings was not significantly affected, whereas the distribution of B. gymnorhyza seedlings was significantly influenced. This study provides important insights into the indirect role of burrowing fauna in the regeneration process and structural dynamics of mangrove ecosystems, especially in the back mangrove zone.
Key findings: Bioturbation, Mounds, Mud Lobster, Mangrove
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