STRUCTURAL DYNAMICS OF LOGGED-OVER FOREST IN SOUTHERN LOWLANDS OF PAPUA (A Case Study of Pometia spp. as Native Plants)

AGUSTINUS, Prof. Dr. Ir. Djoko Marsono; Dr. Ir. Ronggo Sadono; Prof. Dr. Suwarno Hadisusanto S.U.

2017 | Disertasi | S3 Ilmu Kehutanan

Penebangan selektif telah berlangsung selama puluhan tahun di Papua Selatan, namun sedikit informasi mengenai pengaruhnya terhadap perubahan ekologis dan dinamika populasi spesies tertentu. Pometia adalah spesies sasaran dalam aktivitas pembalakan. Oleh karena itu, penelitian ini bertujuan untuk mengetahui dampak penebangan terhadap perubahan ekologis hutan bekas tebangan dan dinamika populasi Pometia setelah penebangan selektif. Penelitian dilakukan di konsesi HPH PT Tunas Timber Lestari, Papua Selatan. Data dikumpulkan di hutan primer, hutan bekas tebangan satu tahun, hutan bekas tebangan lima tahun, hutan bekas tebangan sepuluh tahun dan hutan bekas tebangan lima belas tahun, sedangkan untuk menganalisis data dinamis populasi diambil secara permanen. merencanakan. Hasilnya menunjukkan bahwa jenis pohon dan kepadatan batang menurun selama penebangan pasca-selektif. Bahan organik tanah (SOM) cenderung menurun di hutan bekas tebangan, menunjukkan bahwa hutan bekas tebangan masih memulihkan kesehatan. Populasi Pometia meningkat secara dramatis karena lebih banyak dikontribusikan oleh individu kecil. Namun, tingkat pertumbuhan populasi sisa sisa melebihi tingkat pertumbuhan Pometia selama ini. Secara meyakinkan, peran individu besar Pometia diperlukan sebagai pohon induk putatif untuk memungkinkan regenerasi alami.

The selective logging has been taking place for decades in South Papua, yet less information concerning its effect on ecological change and population dynamic of certain species. Pometia is target species in logging activity. Hence, this research was intended to investigate impact of logging on ecological alteration of logged forest and population dynamic of Pometia after selective logging. The study was conducted in logging concession of PT Tunas Timber Lestari, South Papua. Data were collected in primary forest, one-year logged-over forest, five-year logged-over forest, ten-year logged-over forest and fifteen-year logged-over forest, while to analyze population dynamic data were taken in permanent sampling plot. The results revealed that tree species and stem density decreased during post-selective logging. The soil organic matter (SOM) tended to decline in logged forest, suggesting that logged forest is still recuperating. Population of Pometia increased dramatically as contributed more by small individuals. However, population growth rate of remnant stands outcompeted the population growth rate of Pometia over the time. Conclusively, the role of large individuals of Pometia is necessary as putative parent trees to allow its natural regeneration.

Kata Kunci : tropical logged forest, South Papua, population dynamic, Canonical Correspondence Analysis, integral projection model