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Characteristics of Soil Fauna Communities and Habitat in Small- Holder Cocoa Plantation in South Konawe Kilowasid, Laode Muhammad Harjoni; Syamsudin, Tati Suryati; Susilo, Franciscus Xaverius; Sulistyawati, Endah; Syaf, Hasbullah
JOURNAL OF TROPICAL SOILS Vol. 18 No. 2: May 2013
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2013.v18i2.149-159

Abstract

The composition of the soil fauna community have played an important role in regulating decomposition and nutrient cycling in agro-ecosystems (include cocoa plantation). Changes in food availability and conditions in the soil habitat can affected the abundance and diversity of soil fauna. This study aimed: (i) to analyze the pattern of changes in soil fauna community composition and characteristic of soil habitat based on the age increasing of cocoa plantation, and (ii) to identify taxa of soil fauna and factors of soil habitat which differentiate among the cocoa plantations. Sampling of soil, roots and soil fauna was conducted from cocoa plantation aged 4, 5, 7, 10, and 16years. Difference in composition of the soil fauna community between ages of the cocoa plantation is significant. Profile of soil habitats was differ significantly between the cocoa plantations, except 5 and 7 years aged. A group of soil fauna has relatively limited in its movement, and sensitively to changes in temperature, soil acidity, and the availability of food and nitrogen are taxa differentiating between soil fauna communities. Soil physic-chemical conditions that affect metabolic activity, movement, and the availability of food for soil fauna is a  distinguishing factor of the characteristics of the soil habitat between different ages of smallholder cocoa plantations.Keywords: Abundance, arthropod, composition, nematodes[How to Cite: Kilowasid LMH, TS Syamsudin, F X Susilo, E Sulistyawati and H Syaf. 2013.Characteristics of Soil Fauna Communities and Habitat in Small-Holder Cocoa Plantation in South Konawe. J Trop Soils 18 (2): 149-159. Doi: 10.5400/jts.2013.18.2.149][Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.2.149]REFERENCESAdejuyigbe CO, G Tian and GO Adeoye.1999. Soil microarthropod populations under natural and planted fallows in Southwestern Nigeria. 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Pemanfaatan Limbah Bambu untuk Mainan Musik Prasekolah dengan Pendekatan Surface Mimicry Joyodiharjo, Bismo Jelantik; Sidarta, Nabilla Puteri; Piliang, Yasraf Amir; Larasati, Dwinita; Syamsudin, Tati Suryati
Serat Rupa: Journal of Design Vol 8 No 1 (2024): SRJD - JANUARI
Publisher : Faculty of Humanities and Creative Industries, Maranatha Christian University (formerly Faculty of Fine Arts and Design)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/srjd.v8i1.6478

Abstract

During design process, Surface Mimicry can be used as an alternative approach by utilizing the role and similarity of objects based on their familiarity with shapes. Unlike behavior and functional mimicry, the point of view on surface mimicry expresses the visual similarity of objects rather than their actions and functions. Bamboo is a traditional Indonesian material that is easy to find and use as a basic material for various musical instruments, but the waste is still rarely processed. For example, at the location of Saung Angklung Udjo's partner as a supplier of angklung in large quantities in West Java, waste from production with a subtractive process of bamboo sticks of various sizes ends up being material that is only burned. This article tells the design process of prototype works of preschool music toys that utilize the potential of bamboo waste and the subtractive production process through a surface mimicry approach that is relevant to the character of the original material form. This design exploration activity is part of mimicry research (surface, behavior, function), process (formative, subtractive, additive) and system (integral, modular) which can be an alternative method in developing innovative products in the context of environmentally friendly and sustainable design.               
IDENTIFICATION OF THE MOLUCCAN MEGAPODE (Eulipoa wallacei) NATURAL HABITAT IN HARUKU ISLAND, INDONESIA AND ITS VEGETATION COMPOSITION Leimena, Handy Erwin Pier; Sjarmidi, Achmad; Syamsudin, Tati Suryati
BIOTROPIA Vol. 30 No. 2 (2023): BIOTROPIA Vol. 30 No. 2 August 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.2.1778

Abstract

The characteristics of island vegetation greatly influence the activities of endemic birds in island areas, such as the Moluccan endemic megapodes (Eulipoa wallacei) on Haruku Island. Therefore, it is essential to identify the specific location of the habitat utilized by individual birds for their daily activities on Haruku Island and to analyze the composition of the vegetation and the variety of plant species. Identification of bird habitat locations using radio-tracking on four newly hatched chicks and four adult birds. A total of 330 individual tracking points were recorded during the study period. The vegetation sample used a total of 420 plots for seedlings, saplings, poles, and trees which were then analyzed for importance value index (IVI), diversity, evenness, and similarity. We found that the Tanjung Maleo forest was their nesting habitat, while the Marunimei and Lalean forests were their daily habitats. A total of 91 plant species and 60 plant families were discovered with the vegetation diversity value of the three habitats was moderate (H’mean = 3.07) and tended to be dominated by air plant (Kalanchoe pinnata), sword fern (Nephrolepsis exalta), cogongrass (Imperata cylindrica), coco-grass (Cyperus rotundus), Indian camphorweed (Pluchea indica), and lanzone (Lansium domesticum) (Emean = 0.88), and have a relatively low level of species similarity between habitats (SImean = 38.30%). We found that the daily habitat of the Moluccan megapode on Haruku Island was around their nesting sites and has a complex structure because it was composed four vegetation strata. Therefore, for conservation purposes, habitat management must prioritize preserving forest habitats around the bird nesting sites.
Mapping Aboveground Carbon in Rehabilitated Mangrove: Evaluating the Performance of Regression Modelling with Satellite-Derived Vegetation Indices and Kriging Interpolation Sumarga, Elham; Syamsudin, Tati Suryati; Sarah, Sarah; Qalbi, Mutiara Putri; Tansy, Belinda Calista; Basyuni, Mohammad; Larekeng, Siti Halimah
Journal of Multidisciplinary Applied Natural Science Vol. 6 No. 1 (2026): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.311

Abstract

Mangroves are vital ecosystems in combating climate change, primarily through their exceptional capacity for carbon sequestration and long-term storage. To effectively manage and conserve these valuable resources, accurate carbon stock mapping is crucial. Given the inherent variability of mangrove biophysical characteristics, selecting appropriate mapping methodologies is essential. This study aimed to evaluate two distinct approaches: regression modeling using satellite-derived vegetation indices and kriging interpolation, within the Angke Kapuk mangrove area of Jakarta. Regression models were constructed utilizing forest canopy density (FCD) and its constituent indices (derived from Landsat 8), alongside normalized difference vegetation index (NDVI), advanced vegetation index (AVI), and soil adjusted vegetation index (SAVI) from Sentinel 2A, as predictor variables. Field-based carbon stock data, obtained from 50 square plots (10 m × 10 m) using established allometric models, served as the response variable. The study revealed substantial heterogeneity in carbon storage, ranging from 34.76 to 236.87 tons/ha, with a mean of 135.31 tons/ha and a standard deviation of 50.09 tons/ha. Regression modelling, however, demonstrated limited predictive power, achieving a maximum R² value of only 0.03, indicating a poor fit between the predictor variables and observed carbon stocks. Kriging interpolation yielded moderate accuracy, as evidenced by a coefficient of variation of root mean square error (CV RMSE) of 0.39. This disparity in performance can be attributed to several factors, including the homogeneity of the rehabilitated mangrove canopy, which limited the ability of vegetation indices to accurately represent carbon stock variations. Furthermore, kriging's capacity to model spatial autocorrelation proved advantageous in this context. Based on these findings, this paper discusses the influence of mangrove characteristics on modelling performance and provides practical recommendations for area managers regarding future carbon stock mapping initiatives.
KEBIASAAN MAKAN IKAN SIDAT, Anguilla bicolor bicolor, DARI SUNGAI CIKASO DAN RAWA PESISIR CIROYOM, JAWA BARAT Putri, Masayu Rahmia anwar; Syamsudin, Tati Suryati
BAWAL Widya Riset Perikanan Tangkap Vol 13, No 2 (2021): (AGUSTUS) 2021
Publisher : Politeknik Kelautan dan Perikanan Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/bawal.13.2.2021.77-84

Abstract

Sungai Cikaso dan Rawa Pesisir Ciroyom, merupakan dua habitat yang dihuni oleh ikan sidat tropis Anguilla bicolor bicolor di Kabupaten Sukabumi, Jawa Barat. Spesies ini merupakan ikan asli Indonesia yang memiliki nilai ekonomi tinggi. Sebagai komoditas ekspor, ikan ini ditangkap pada stadium post larva (glass eel) kemudian dibudidayakan di penangkaran. Informasi kebiasaan makan Anguilla bicolor bicolor dapat digunakan sebagai salah satu bahan dalam perencanaan pengelolaan sidat di alam. Penelitian ini bertujuan untuk mengetahui jenis makanan dan kebiasaan makan Anguilla bicolor bicolor di Sungai Cikaso dan rawa pesisir Ciroyom, Jawa Barat. Kebiasaan makan 54 sidat tropis Anguilla bicolor bicolor dari aliran utama Sungai Cikaso dan saluran parit rawa pesisir Ciroyom, Jawa Barat, diamati antara bulan Juni dan Desember 2020. Pengambilan sidat menggunakan perangkap dan pancing. Setiap sampel ikan sidat diukur panjangnya. Ikan dibedah dan isi perutnya diawetkan dengan formalin 5%. Sampel dikelompokkan berdasarkan kelas panjang yaitu 20 - 25 cm, 25 - 30 cm, 30 - 35 cm, dan 35 - 40 cm. Index bagian terbesar (Index of preponderance) digunakan untuk mengetahui jenis makanan dan kebiasaan makan Anguilla bicolor bicolor. Dominasi kepiting sebagai makanan ikan sidat menunjukkan bahwa sidat sebagai ikan karnivora. Data yang dikumpulkan dari pengamatan laboratorium menunjukkan beberapa jenis makanan yang dikonsumsi ikan sidat, yaitu; kepiting, udang, serangga, ikan, Annelida, bagian tumbuhan, dan fitoplankton. Makanan utama ikan ini saat berukuran kecil adalah serangga, dan memakan kepiting saat mereka berukuran lebih besar. Cikaso River and Ciroyom Coastal Marsh were two habitats that inhabited by tropical eel, Anguilla bicolor bicolor in Sukabumi Regency, West Java. This species was Indonesia's native fish that had a high economic value. As export commodity, this fish caught in the post larvae stage (glass eel) then grow in captivity. The food habit information of Anguilla bicolor bicolor can be used for management planning of eel in the wild. This study aimed to determine the food and feeding habit of Anguilla bicolor bicolor in Cikaso River and Coastal Swamp of Ciroyom, West Java. The food habits of 54 tropical eels, Anguilla bicolor bicolor, from mainstream of Cikaso River and ditch channels of Ciroyom Coastal Marsh, West Java, were examined between June and December 2020. Eels were collected using traps and hook and line. The length of each fish was measured. The fishes were dissected and the stomach of eels was preserved by formalin 5%. The samples were grouped as 20-25 cm, 25 to 30 cm, 30 to 35 cm, and 35 to 40 cm. Index of preponderance was used to determine the feeding habits of Anguilla bicolor bicolor. The domination of crab as a diet of eel indicates that eel as carnivorous fish. Data collected from laboratory observation showed some foods consumed by eels; crab, shrimp, insect, fish, Annelida, vegetation, and phytoplankton. This fish feed mainly on insects when small and feed mainly on crabs as they grow.