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M. A. Langi
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Agriculture, Biological Sciences & Forestry

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LAJU DEKOMPOSISI AWAL SERASAH POHON Palaquium obovatum, Spathodea campanulata dan Calophyllum soulattri DI HUTAN BRON WAREMBUNGAN KABUPATEN MINAHASA Rumambi, Juwita F.; Langi, M. A.; Nurmawan, Wawan
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.22791

Abstract

ABSTRACT The availability of nutrient inputs for soil fertility in forests is very important to preserve in an effort to anticipate a decrease in land productivity. Litter decomposition is a process of destruction of organic matter (litter) into nutrients available in the soil. This study aims to determine and compare the rate of decomposition of Palaqium obovatum, Spathodea campanulata, and Calophyllum soulattri litter in Bron Warembungan Forest, Minahasa Regency. This study was carried out on the leaf litter of Palaqium obovatum, Spathodea campanulata, and Calophyllum soulattri. The method of decomposition rate data collection using 36 litter bags placed randomly (with experiments using a completely randomized design (CRD) with two factors namely tree type and duration of decomposition) on the forest floor taken every week for four weeks, followed simultaneously with temperature measurements and humidity. The results showed that of the three main tree species in Bron Forest, the highest decomposition rate was shown by leaf litter of Spathodea campanulata with an average of 15.49% per week, followed by Palaquium obovatum (11.74% per week) and then Calophyllum soulattri ( 3.07% per week). The decomposition process in the three leaf litter took place very quickly in the first week which can also be associated with the results of measurements of water content in litter.Keywords: tropical rainforest, decomposition of litter, leaf litter
DINAMIKA KOMUNITAS TUMBUHAN PADA EKOSISTEM BATAS CAGAR ALAM GUNUNG AMBANG Amon, Hendra; Tasirin, J.; Langi, M. A.
EUGENIA Vol 19, No 3 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.19.3.2013.7722

Abstract

ABSTRAK Tujuan penelitian ini untuk mempelajari dinamika komunitas tumbuhan pada ekosistem batas Cagar Alam Gunung Ambang. Metode yang digunakan adalah plot penelitian ditempatkan secara sistematik dengan bantuan garis transek. Hasil penelitian menunjukkan bahwa di dalam Cagar Alam Gunung Ambang terdapat 15 spesies dan 12 famili fase semai, 15 spesies dan 13 famili fase pancang, 24 spesies dan 18 famili fase tiang, 27 spesies dan 20 famili fase pohon, di luar Cagar Alam Gunung Ambang terdapat 16 spesies dan 13 famili fase semai, 19 spesies dan 16 famili fase pancang, 21 spesies dan 18 famili fase tiang, serta 24 spesies dan 17 famili fase pohon. Dominasi spesies di dalam Cagar Alam Gunung Ambang fase semai dan pancang pada nantu (Palaquium obtusifolium) sebesar 40,19% dan 41,79%, fase tiang pada sirih hutan (Piper aduncum) sebesar 61,56%, dan fase pohon pada kemiri (Aleurites moluccana) sebesar 38,25%, di luar Cagar Alam Gunung Ambang fase semai dan pancang pada nantu (Palaquium obtusifolium) sebesar 42,72% dan 35,77%, fase tiang pada sirih hutan (Piper aduncum) sebesar 28,21%, fase pohon pada kemiri (Aleurites moluccana) sebesar 42,12%. Perubahan yang terjadi dalam komunitas tumbuhan pada ekosistem batas Cagar Alam Gunung Ambang mengalami perubahan penyusun pertumbuhan spesies, baik dari segi populasi, sebaran spesies maupun dominasi spesies dalam suatu komunitas. Kata kunci: dinamika, komunitas, tumbuhan, ekosistem batas, Gunung Ambang
Co-Authors Hendra Amon Rumambi, Juwita F. Wawan Nurmawan