Sebaran Ukuran Diameter Pohon Untuk Menentukan Umur dan Regenerasi Hutan di Lahan Bera Womnowi, Manokwari
DOI:
https://doi.org/10.21776/ub.biotropika.2019.007.02.4Keywords:
alluvial, diameter setinggi dada, hutan sekunder, kurva J terbalik, Papua BaratAbstract
Lahan bera telah menjadi bentuk ekosistem yang umum dijumpai di Papua. Mengukur dan mengidentifikasi sebaran ukuran diameter pohon di lahan bera Womnowi Sidey Manokwari Papua Barat adalah tujuan utama penelitian ini. Pada luas 1 hektar dibuat sub petak berukuran 20 x 20 meter yang di dalamnya terdapat sub petak 10 x 10 meter, sehingga total sub petak berjumlah 25. Diameter pohon diukur secara langsung di lapangan pada ketinggian 1.3 meter atau diameter pohon setinggi dada. Data diproses dan dianalisis secara statistik dan tabulasi untuk menentukan pola regenerasi vegetasi pohon. Hasil menunjukkan dominasi sebaran ukuran diameter pohon pada kelas-kelas tertentu, namun tetap menunjukkan kurva J terbalik sebagai ciri proses regenerasi hutan sekunder intermediet yang baik. Nilai korelasi yang tinggi antara jumlah individu per hektar dengan ukuran sebaran kelas diameter vegetasi pohon dominan berturut-turut Pometia pinnata, Lansium domesticum, Dracontomelon dao, dan Octomeles sumatrana. O. sumatrana adalah jenis dominan yang memiliki ukuran diameter pohon terbesar dibanding jenis dominan lainnya. Secara klasik disimpulkan preferensi habitat jenis tumbuhan selama periode bera berperan dalam daya regenerasi dan memengaruhi sebaran ukuran diameter pohon.
Kata kunci: alluvial, diameter setinggi dada, hutan sekunder, kurva J terbalik, Papua Barat
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