SGER: Complex Pelagic Interactions in the Southern Ocean: Deciphering the Antarctic Paradox

拟议的多学科项目的主要目标是量化、检查、模拟和验证调控南大洋沿岸水域浮游食物网的复杂相互作用，包括直接、间接和反馈影响，目的是阐明浮游植物生物量和生产量低的原因，尽管那里的营养物质可获得性很高。特别是，该项目将评估通过铵的作用而诱导的反馈机制，铵主要由南大洋中的草食性浮游动物聚集释放，特别是磷虾，对浮游植物群落对紫外线胁迫的抗性，特别是对氮的并入率，包括铵和硝酸盐的影响，以及浮游植物水华的后续发展。该项目不仅将通过实验解决这一问题，还将考虑以小片水域为主的异质景观背景下的复杂相互作用，这为复杂相互作用的发生提供了场景。该项目将在2004年通过陆上作业(胡安·卡洛斯一号)进行，并在2005年通过随后的海洋巡航(R/VHesp游乐设施)进行。

The primary goal of the proposed multidisciplinary project is to quantify, examine, modeland validate the complex interactions, involving direct, indirect and feedback effects,that regulate the planktonic food web in the coastal waters of the Southern Ocean with theaim of elucidating the causes underlying the low phytoplankton biomass and productiondespite the high nutrient availability there. In particular, the project will evaluatethe feedback mechansisms induced through the role of ammonium, largely released byaggregations of herbivorous zooplankton present in the Southern Ocean, krill specifically,on the resistance to UV stress by the phytoplanktonic community and, in particular,effects on the nitrogen incorporation rates, both ammonium and nitrate, and the subsequentdevelopment of phytoplankton blooms. The project will not only address the problemexperimentally, but will also consider the complex interactions in the context of theheterogeneous landscape, dominated by small parcels of water, that provides the scenarioon which the complex interactions occur. This project will be conducted through ashore-based (Juan Carlos I) operation in 2004 and a subsequent oceanographic cruise (R/VHesp rides) in 2005.