{"id":145815,"date":"2023-01-25T16:21:12","date_gmt":"2023-01-25T15:21:12","guid":{"rendered":"https:\/\/uniavisen.dk\/en\/event\/qi-guan-ign-defends-his-thesis-at-geography-section\/"},"modified":"2023-01-25T16:21:12","modified_gmt":"2023-01-25T15:21:12","slug":"qi-guan-ign-defends-his-thesis-at-geography-section","status":"publish","type":"event","link":"https:\/\/uniavisen.dk\/en\/event\/qi-guan-ign-defends-his-thesis-at-geography-section\/","title":{"rendered":"Qi Guan, IGN, defends his thesis at Geography Section"},"content":{"rendered":"

Qi Guan defends his thesis,<\/p>\n

Impacts of land processes on lake eutrophication in China<\/strong>
\nCropland management, human activities, and climate change<\/p>\n

Zoom link<\/a><\/p>\n

Supervisors:<\/strong>
\nAssociate Professor Guy Schurgers, IGN
\nAssistant Professor Jing Tang, Lund University \u2013 Sweden
\nAssociate Professor Lian Feng, Southern University of Science and Technology \u2013 China<\/p>\n

Assessment Committee:<\/strong>
\nSenior scientist Alberte Bondeau, CNRS, Mediterranean Institute of terrestrial\u00a0and marine Biodiversity and Ecology \u2013 France
\nResearch director Claudia Giardino, CNR, Institute for Electromagnetic Sensing\u00a0of the Environment \u2013 Italy
\nProfessor Bo Elberling (chair), IGN<\/p>\n

Summary:<\/strong>
\nIn recent decades, lake eutrophication has become a big environmental issue in China. High agriculture fertilization and rapid economic development have caused substantial nutrient discharge into freshwater ecosystems, which can largely stimulate phytoplankton growth and alter lake processes. To mitigate severe environmental impacts and meet increasing crop demand in coming decades, a more sustainable agriculture ecosystem will have to be developed.
\nThis thesis investigated the linkage between terrestrial nutrient sources and eutrophication dynamics in regional lake ecosystems, and how to balance future agriculture production enhancement with reduction in agricultural nitrogen exports through cropland reallocation. Based on satellite observations, fifty large lakes on the Yangtze Plain experienced high probability of eutrophication occurrence. Agriculture nutrient exports and industrial wastewater discharge were strongly linked with eutrophication trends in the western and eastern lakes of the Yangtze Plain, respectively. As an effective measure, reallocating cropland spatially can lead to a decline in the leached nitrogen and irrigation water, but an increase in crop production. Our results revealed the importance of land processes in influencing eutrophication changes in lake ecosystems, and an important measure of cropland reallocation to reduce environmental impacts of future agriculture systems in China.<\/p>\n

A digital version of the PhD thesis can be obtained from the PhD secretary Mikala Heckscher a<\/em>t\u00a0mikala@ign.ku.dk<\/p>\n","protected":false},"excerpt":{"rendered":"

Qi Guan defends his thesis, Impacts of land processes on lake eutrophication in China Cropland management, human activities, and climate change Zoom link Supervisors: Associate Professor Guy Schurgers, IGN Assistant Professor Jing Tang, Lund University \u2013 Sweden Associate Professor Lian Feng, Southern University of Science and Technology \u2013 China Assessment Committee: Senior scientist Alberte Bondeau, […]<\/p>\n","protected":false},"author":0,"featured_media":145816,"template":"","class_list":["post-145815","event","type-event","status-publish","has-post-thumbnail","hentry","event_category-phd-thesis-defense"],"acf":[],"aioseo_notices":[],"yoast_head":"\nQi Guan, IGN, defends his thesis at Geography Section<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uniavisen.dk\/en\/event\/qi-guan-ign-defends-his-thesis-at-geography-section\/\" \/>\n<meta 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