Volcanic eruptions and glacier recession: understanding the effects of particle inputs on planktonic communities of Andean–Patagonian lakes

IF 1.7 3区 地球科学 Q4 ENVIRONMENTAL SCIENCES
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Abstract

Lakes are particularly vulnerable to environmental changes and thus considered sentinels and integrators of processes that occur in the atmosphere and terrestrial environments. Individual up to ecosystemic metabolic pathways and nutrient cycling in lakes respond to both natural and human disturbances. Disentangling the effect of such different forces is a particular challenge for lake ecological studies. Here we present a conference paper based on previous studies carried out in Andean-Patagonian lakes under two important events: the Puyehue–Cordón Caulle eruption in 2011 and the glacial recession with a glacial lake outburst flood (GLOF) in 2009. We discuss how biological variables responded to these two natural events that produced the input of minerogenic inorganic particles into the lakes. We present the combination of observational and experimental research, including new molecular methods, that contributed to understanding the effects of these inorganic particles on aquatic ecosystems. Both events involved changes in the transparency of the lakes that affected phytoplankton parameters (biomass vertical distribution), bacteria composition and community structuring process. Finally, both events had very contrasting effects on zooplankton, in the same range of particle concentrations. Particles from glacial melting are beneficial for daphnids reducing the impact of ultraviolet radiation and increasing the quality of the food. In contrast, volcanic ashes are abrasive materials that have a deleterious effect for filtering zooplankton.

火山爆发和冰川退缩:了解颗粒输入对安第斯-巴塔哥尼亚湖泊浮游生物群落的影响
摘要 湖泊特别容易受到环境变化的影响,因此被认为是大气和陆地环境变化过程的哨兵和整合者。湖泊中从个体到生态系统的代谢途径和营养循环都会受到自然和人为干扰的影响。厘清这些不同力量的影响是湖泊生态研究面临的一项特殊挑战。在此,我们根据之前在安第斯-巴塔哥尼亚湖泊中进行的研究,提交了一份会议论文,这些研究是在两个重要事件下进行的:2011 年普耶胡埃-科东考勒火山爆发和 2009 年冰川退缩与冰湖溃决洪水(GLOF)。我们讨论了生物变量是如何对这两个自然事件做出反应的,这两个自然事件向湖泊输入了矿化无机颗粒。我们介绍了观察和实验研究的结合,包括新的分子方法,这些研究有助于了解这些无机颗粒对水生生态系统的影响。这两个事件都涉及湖泊透明度的变化,从而影响浮游植物参数(生物量垂直分布)、细菌组成和群落结构过程。最后,在颗粒浓度相同的情况下,两次事件对浮游动物的影响截然不同。冰川融化产生的微粒对水蚤有益,可减少紫外线辐射的影响,提高食物质量。与此相反,火山灰是一种研磨材料,对浮游动物的过滤产生有害影响。
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来源期刊
Journal of Paleolimnology
Journal of Paleolimnology 地学-地球科学综合
CiteScore
3.70
自引率
9.50%
发文量
44
审稿时长
3 months
期刊介绍: The realization that a historical perspective is often useful, if not essential, to the understanding of most limnological processes has resulted in the recent surge of interest in paleolimnology. The main aim of the Journal of Paleolimnology is the provision of a vehicle for the rapid dissemination of original scientific work dealing with the reconstruction of lake histories. Although the majority of papers deal with lakes, paleoenvironmental studies of river, wetland, peatland and estuary systems are also eligible for publication. The Journal of Paleolimnology, like the subject itself, is multidisciplinary in nature, and papers are published that are concerned with all aspects (e.g. biological, chemical, physical, geological, etc.) of the reconstruction and interpretation of lake histories. Both applied and more theoretical papers are equally encouraged. The Journal of Paleolimnology will continue to be a major repository for papers dealing with climatic change, as well as other pressing topics, such as global environmental change, lake acidification, eutrophication, long-term monitoring, and other aspects of lake ontogeny. Taxonomic and methodological papers are also acceptable provided they are of relatively broad interest. New equipment designs are frequently featured. In addition to original data and ideas, the Journal of Paleolimnology also publishes review articles, commentaries and program announcements. A relevant Book Review Section is also featured.
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