SGER: Viral Impacts on Fluvial and Limnetic Biogeochemistry

威廉姆斯格：病毒对河流和湖泊生物地球化学的影响虽然通常被认为是动物和植物的病原体，但现在已知病毒在水生环境中无处不在，它们的种群与细菌和其他微生物有关。在远洋海洋系统中，每一滴水中都存在数十万个病毒，每天直接破坏很大一部分（20-30%）微生物群落。这项探索性研究将研究病毒对田纳西州大烟山及其周围河流和湖泊微生物群落和营养循环的影响。研究人员将借鉴海洋病毒生态学的现有技术，确定病毒的季节性丰度和分布，并估计它们给常驻微生物群落带来的死亡率。此外，还将量化病毒对碳和营养元素循环的影响，以确定病毒在这些系统的生物地球化学循环中的作用。

00-03069WilhelmSGER: Viral Impacts on Fluvial and Limnetic BiogeochemistryAlthough commonly considered pathogens of animals and plants, viruses are now known to be pervasive in aquatic environments, where their populations are linked to bacteria and other microbes. In pelagic marine systems, the hundreds of thousands of viruses that exist in every drop of water lead to the direct daily destruction of a significant portion (20-30%) of the microbial community. This exploratory study will examine the impact of viruses on microbial communities and nutrient cycles in rivers and lakes in and around the Great Smoky Mountains of Tennessee. Borrowing established techniques from marine viral ecology, the investigators will determine the seasonal abundance and distribution of viruses and estimate the mortality they confer on the resident microbial communities. In addition, the impact of viruses on the recycling of carbon and nutrient elements will be quantified to determine the role of viruses in the biogeochemical cycles of these systems.