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 Researcherดร. ชมชิด พรหมสิน, อาจารย์ที่ทำงาน:ภาควิชาภูมิศาสตร์ คณะสังคมศาสตร์ บางเขน สาขาที่สนใจ:Environmental Geography, Geography of Settlement, Remote Sensing and Geographic Information System Resume |
ผลงานตีพิมพ์ในวารสารวิชาการNutrients, light and phytoplankton production in the shallow, tropical coastal waters of Bandon Bay, Southern Thailandผู้แต่ง: Yoshikawa, T, Tomizawa, K, Okamoto, Y, Watanabe, K,  Dr.Jintana Salaenoi, Associate Professor , Hayashizaki, K, Kurokura, H, Ishikawa, S, วารสาร:  
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ผลงานตีพิมพ์ในวารสารวิชาการThe effect of phenology on the carbon exchange process in grassland and maize cropland ecosystems across a semiarid area of Chinaผู้แต่ง:Du, Q., Liu, H., Li, Y., Xu, L., Dr.Sapit Diloksumpun, Assistant Professor , วารสาร: |
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ผลงานตีพิมพ์ในวารสารวิชาการTwo separate periods of the LAI-VIs relationships using in situ measurements in a deciduous broadleaf forestผู้แต่ง:Dr.Supannika Koeysin, Assistant Professor , Nagai, S., Nasahara, K.N., Muraoka, H., Suzuki, R., วารสาร: |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Dissolved Oxygen Environment of the Fish Farm in Yashima Bay, Japan. I. Primary Productivity of Sea Water) ผู้เขียน:นายไตรเทพ วิชย์โกวิทเทน , Hiroo Inoue สื่อสิ่งพิมพ์:pdf AbstractThe Steele’s equation was applied for estimation of primary productivity of sea water from fish culture area in Yashima Bay and expressed in the term: where P=Production rate per unit surface (mgO2 / m2hr), P(a)max = maximum production rate based on chl-a (mgO2/mg chl-a hr), chl-a = chlorophyll-a concentration (mg/m3) , Kd = extinction coefficient (m-1), i0 = incident light at the sea surface (klux), iz = light quantum at depth z meter (klux), imax =maximum light intensity that gave maximum production rate (klux). The extinction coefficient was evaluated from the equation: Kd = 0.06 + 0.060(SS) + 0.015 (chl-a)+ 0.002(CODd) where SS=dry weight of suspended particulate matter (g/m3), CODd = chemical oxygen demand of dissolved organic matter in sea water (g/m3). Day rate intergrals were calculated according to the equation based on the summation of rates of short intervals Thus, the primary productivity in Yashima Bay was 7.40 gO2/m2d with the values of P(a)max as 65.5 mgO2/mg chl-a hr and imax 50.5 klux. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Primary Productivity of the Pygmy Bamboo (Arundinaria pusilla) in the Dry Dipterocarp Forest at Sakaerat, Nakhon Ratchasima) ผู้เขียน:นายนิวัติ เรืองพานิช, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe aboveground and belowground biomass of Arundinaria pusilla in two strata of the dry dipterocarp forest were monthly harvested and net primary production, accumulation and disappearance rates by compartment were estimated. These data were further utilized for determination of system transfer functions and the efficiency of energy capture. The results indicated that the aboveground standing crop of standing live, standing dead and litter varied considerably through different sampling intervals within and between each stratum. More belowground biomass was concentrated in the upper soil layer and the amount declined with an increase in depth. The community annual aboveground net primary production was estimated on ash-free basis to be 210 gm-2 on stratum 1 and 329 gm-2 on stratum 2 and the belowground net production was 2,844 gm-2 on stratum 1 and 2,884 gm-2 on stratum 2. The accumulation of standing dead (256 gm-2) and litter (214 gm-2) on stratum 1 was greater than the standing dead (198 gm-2) and litter (137 gm-2) on stratum 2. Annual disappearance of litter was also higher on stratum 1 (149 gm-2) than that of stratum 2 (119 gm-2). But the belowground disappearance was much greater on stratum 2 (2,794 gm-2) than that of stratum 1 (2,573 gm-2). Annual efficiency of energy capture was estimated to be 1.77 percent on stratum 2 and 1.86 percent on stratum 1based on 50 percent usable solar insolation. It was shown that the belowground portion of Arundinaria pusilla played an important role in the dynamics of the system as a whole. This study confirmed that the belowground biomass in this kind of plant community should be considered as being very important in the study of the ecosystem functions. |
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