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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 21 to 23 of 23 (0.019 seconds)Spelling suggestions: "subject:"lemna"" "subject:"emna""
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Spatial Heterogeneity of Ecosystem Metabolism in a Shallow WetlandRackliffe, Daniel Riley 01 December 2014 (has links) (PDF)
Spatial heterogeneity in ecosystem metabolism may play a critical role in determining ecosystem functions. Variation in ecosystem metabolism between macrophyte patches in shallow wetlands at the extremes of freshwater habitats has not been investigated. We estimated ecosystem metabolism in mesocosms containing different macrophytes using 24-hour oxygen curves to test our hypotheses: (1) net aquatic production (NAP) during spring and summer would be similar among algal patches (metaphyton and Chara), (2) NAP in algal patches would be greater than patches dominated by the vascular plant Potamogeton foliosus, (3) heterotrophy and anaerobiosis would be greatest in patches dominated by Lemna, and (4) the pond would be autotrophic in the spring and fall but heterotrophic in the summer. We found that different patches generated differences in NAP but not always as we predicted. NAP was different among algal patches in the spring and summer, and only metaphyton was more heterotrophic than P. foliosus. In the summer Chara and Lemna patches were heterotrophic and metaphyton became autotrophic. As predicted, the pond was net autotrophic in the spring and heterotrophic in the summer with an absence of patchiness in fall attributed to the dominance of Lemna. This research suggests the importance of macrophyte patchiness in wetlands in determining patterns of ecosystem metabolism despite challenges in measuring 24 hour oxygen curves (e.g. oxygen supersaturation). Consequently, macrophyte traits may be important in determining spatial heterogeneity of ecosystem metabolism in shallow ponds.
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増殖中の植物における概日リズム動態の時空間的解析上野, 賢也 23 May 2022 (has links)
京都大学 / 新制・課程博士 / 博士(理学) / 甲第24078号 / 理博第4845号 / 新制||理||1693(附属図書館) / 京都大学大学院理学研究科生物科学専攻 / (主査)准教授 小山 時隆, 教授 田村 実, 教授 山内 淳 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM
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Phytoremediation of Selected Pharmaceuticals by and their Phytotoxicity to Aquatic PlantsMaharjan, Renu 21 August 2014 (has links)
No description available.
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