Judul: Pengukuran Emisi CO₂ dari Tanah Pekarangan Untuk Wilayah Perkotaan
Abstrak: CO₂ emissions generated from below the ground surface is derived from plant root respiration and activity of organismes in the soil. The amount of CO₂ emissions between different fields, depends on the diversity and density of existing vegetation, soil type and managed. The purpose of this study was to measure the CO₂ emissions from garden soil for urban areas and compare the levels of CO₂ emissions generated by land vegetated with non-vegetation land on mineral soil. The measurement results indicate CO₂ emissions generated before treatment from highest to lowest sorted plot 1, plot 4, plot 2 and plot 3. But after the treatment, CO₂ emissions are sorted from highest to lowest is the plot 2 (PO and GM), plot 3 (PO), plot 1 (soil) and plot 4 (PO and JP). Emission factors affecting changes before and after treatment is soil temperature, soil moisture, organic content, plant age and land cover type.
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Judul: CO2 Emissions from Acacia Industrial Plantation Forest Peatlands in Riau Province
Abstrak: This study aims to determine the amount of CO2 emissions from soil (Root Cut and Control Plot) and relations with subsidence, rainfall, soil temperature, soil moisture and wáter table on peatlands Forest Plantation Industry in Langgam, Riau. CO2 emissions from soil was measured using closed chamber method. CO2 sample capture done before closed the chamber (0 minute) and after 6 minutes closed. Measurements result of CO2 emission cumulative from soil in September 2008 to July 2009 was 2563.16 mgCm-2h-1 for the Root Cut plot and 2629.41 mgCm-2h-1 for the Control plot. Based on the results of regression and correlation analysis, factors such as rainfall, subsidence, soil temperature, soil moisture and water table have an influence on the production of CO2. Correlation and regression value between CO2 cumulative and subsidence cumulative with the type of multy positions was (R2=0.86 ; p=0.00) for the Root Cut plot and (R2=0.84 ; p=0.00) for the Control plot, with a negative correlation value of each (-0.92 ; -0.91). Multy positions measurement between CO2 emissions from soil was corerelated with rainfall at (R2=0.50 ; p=0.015) for the Root Cut plot and (R2=0.59 ; p=0.004) for the Control plot, with a negative corelation value of each (-0.71 ; - 0.79). The relationship of CO2 emissions rate from the soil with soil temperature by multy positions type was (R2=0.51 ; p=0.010) for the Root Cut plot and (R2=0.35 ; p=0.026) for the Control plot, with a negative corelation value of each (0.73 ; 0.66). The relationship of CO2 emissions rate from the soil with soil moisture by multy positions type was (R2=0.45 ; p=0.023) for the Root Cut plot and (R2=0.39 ; p=0.039) for the Control plot, with a negative corelation value of each (-0.67 ; -0.63). The relationship of CO2 emissions rate from the soil with wáter table by multy positions type was (R2=0.36 ; p=0.050) for the Root Cut plot and (R2=0.43 ; p=0.028) for the Control plot, with a negative correlation value of each (-0.60 ; -0.66).
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Judul: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii