GDL

Plant Community Dynamic at Kawah Putih and Ranca
Upas Recreation Area, West Java

Dinamika komunitas, Vegetasi, Analisis matriks Leslie
Community dynamic, Vegetation, Leslie matrix analysis

Subjek :
Synecology and population biology - Plants

Kepala Subjek :
Biology

Nomor Panggil (DDC) :
T 581.782 SUL

Sumber pengambilan dokumen : Tesis MAgister Biologi. Bidang Khusus Biologi Lingkungan. (20060176)

Abstrak :

Telah dilakukan penelitian mengenai dinamika komunitas tumbuhan dalam kawasan wisata Kawah Putih danRanca Upas, Jawa Barat dari bulan Agustus 1996 sampai Januari 1997. Pencuplikan data pada lokasi terganggu (LT) dan lokasi tidak terganggu (LIT) di hutan alami, hutan binaan dan komunitas rumput menggtmakan metoda kuadrat. Vegetasi di setiap lokasi dianalisis berdasarkan pelapisan tajuk untuk membandingkan struktur dan komposisi jenis serta memprediksi kemampuan regenerasi beberapa jenis pohon. Tingkat perbedaan vegetasi di setiap lokasi dianalisis menurut indeks Bray-Curtis dan keanekaragamannya menurut indeks Shannon's. Dinamika dan fenologi tumbuhan hanya dilakukan pada populasi Vaccinium varingiaefolium di hutan alami dan Altingia excelsa di hutan binaan. Kestabilan populasi diprediksi dengan matriks Leslie dan kesintasan semai dianalisis menurut rumus Silvertown. Jenis dominan di setiap lapisan vegetasi kedua lokasi hutan alami adalah V. varingiaefolium. Tingkat kesamaan vegetasi (IS=0,72) dan keanekaragaman jenis (LT H'=2,61 dan LTT H'=2,86) di kedua lokasi relatif tinggi. Jenis dominan di kedua lokasi hutan binaan adalah A. excelsa di lapisan I dan II serta Elatostema strigosum di lapisan III. Tingkat kesamaan vegetasi (IS=0,50) dan keanekaragaman jenis (LT H'=1.63 dan LIT H'=1,61) di kedua lokasi relatif tinggi. Jenis rumput yang dominan adalah Panicum sp.l di LT dan Panicum sp.2 di M. Tingkat kesamaan vegetasi (IS=0,0) dan keanekaragaman jenis (LT H'=0,83 dan LTT H'=1,44) di kedua lokasi rendah. Berdasarkan proporsi jumlah individu per 0.1 ha di setiap lapisan vegetasi, jenis pohon di hutan alami yang berregenerasi dengan baik tiga jenis di LT dan lima jenis di LTT, serta dihutan binaan satu jenis di LT dan lima jenis di LTT. Kesintasan semai V.varingiaefolium dan A. excelsa di LTT (Lx=0,70 dan 0,66) lebih tinggi dari LIT (Lx=0,47 dan 0,33). Berdasarkan analisis matriks Leslie, populasi kedua jenis tersebut lebih stabil di LTT dibandingkan di LT. Pola pembentukan pucuk dan buah V. varingiaefolium serta pucuk A. excelsa di setiap lokasi berkorelasi dengan curah hujan dan kelembaban udara relatif. Pembentukan bunga V. varingiaefolium di setiap lokasi berkorelasi dengan suhu udara.

A research about plant community dynamic at Kawah Putih and Ranca Upas recreation area, West Java has been done from August 1996 until January 1997. Data sampling in disturbed location (DL) and undisturbed location (UL) at natural forest, planted forest and grasses community using quadrate methods. Vegetation at each location was analyzed based on the canopy layered to compare those structure and species composition and to predict the regeneration ability for several tree species. The vegetation differences level at each location was analyzed based on Bray-Curtis Index of similarity and the diversity was analyzed based on Shannon's Index (H'). Observation of the dynamic and plant Phenology were done only for Vaccinium varingiaefolium population at natural forest and Altingia excelsa at planted forest. Population stability was predicted using Leslie matrix and survival ability was analyzed based on Silvertown formula. Dominant species at each vegetation layer in both locations of natural forest was V. varingiaefolium. The level of vegetation similarity (IS =0.72) and species diversity (DL H' =2.62 and UL H' =2.86) in both locations were relatively high. Dominant species in both locations of planted forest was A. excelsa at 1" and 2nd layer, and Elatostema strigosum at 3rd layer. The level of vegetation similarity (IS =0.50) and species diversity (DL H' =1.63 and UL H' =1.61) in both locations were relatively high. Dominant species at grass community was Panicum sp.1 in DL and Panicum sp. 2 in UL. The level of vegetation similarity (IS =0.0) and species diversity (DL H' =0.83 and UL H' =1.4) in both locations were relatively low. According to proportion of individual amount per 0.1 ha at each vegetation level, trees species at natural forest that has good regenerated ability in DL three species and in UL five species, and at planted forest in DL one species and in UL five species. Survival ability of V. varingiaefolium and A. excelsa seedlings in UL (Lx =0.70 and 0.66) higher than DL (Lx =0.47 and 0.33). Based on the Leslie matrix
analysis, popula tion structure of both speciel were more stable in UL

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