Chraïbi VLS, Fritz SC. 2020. Assessing the hierarchy of long-term environmental controls on diatom communities of Yellowstone National Park using lacustrine sediment records. Lake Reserv Manage. XX:XXX–XXX.

An ecosystem’s ability to maintain structure and function following disturbance, defined as resilience, is influenced by a hierarchy of environmental controls, including climate, surface cover, and ecological relationships that shape biological community composition and productivity. This study examined lacustrine sediment records of naturally fishless lakes in Yellowstone National Park to reconstruct the response of aquatic communities to climate and trophic cascades from fish stocking. Sediment records of diatom algae did not exhibit a distinct response to fish stocking in terms of assemblage or algal productivity. Instead, 3 of 4 lakes underwent a shift to dominance by benthic diatom species from 1935 to 1950, which suggests lower lake levels resulting from warmer, drier climatic conditions. The lake that did not undergo such a shift is fed by groundwater rather than snowmelt, suggesting a buffering effect by water source. Dissimilarity analysis shows that the diatom assemblages in all 4 lakes have become increasingly dissimilar since circa 1955, suggesting that communities have not yet stabilized from the first-order influence of climate. Thus, climate likely had a more prominent influence on diatom community structure than did manipulation of the fish community. Understanding the relative importance and interplay among abiotic and biotic stressors and the resultant resilience of an ecosystem provides implications for the adaptive management of lakes.

ChraïbiVLS，Fritz SC 2020年。使用湖泊沉积物记录评估黄石国家公园硅藻群落的长期环境控制等级。湖后备管理。XX：XXX–XXX。

生态系统在受到干扰（被定义为复原力）后维持结构和功能的能力受到环境控制等级的影响，包括气候，表面覆盖以及影响生物群落组成和生产力的生态关系。这项研究检查了黄石国家公园天然无鱼湖的湖沉积物记录，以重建水生种群对鱼类种群对气候和营养级联反应的响应。硅藻藻类的沉积物记录在集聚或藻类生产力方面对鱼类种群没有明显的反应。相反，从1935年到1950年，四个底湖中的三个受到底栖硅藻物种的控制权转移，这表明气候变暖和干燥导致湖泊水位降低。没有发生这种变化的湖泊由地下水而不是融雪给水，这表明水源具有缓冲作用。差异分析表明，自1955年左右以来，所有4个湖泊中的硅藻组合物都变得越来越不相似，这表明群落尚未从气候的一级影响中稳定下来。因此，与对鱼类群落的操纵相比，气候可能对硅藻群落结构的影响更大。了解非生物和生物胁迫源之间的相对重要性和相互影响以及生态系统的弹性，为湖泊的适应性管理提供了启示。差异分析表明，自1955年左右以来，所有4个湖泊中的硅藻组合物都变得越来越不相似，这表明群落尚未从气候的一级影响中稳定下来。因此，与对鱼类群落的操纵相比，气候可能对硅藻群落结构的影响更大。了解非生物和生物胁迫源之间的相对重要性和相互影响以及生态系统的弹性，为湖泊的适应性管理提供了启示。差异分析表明，自1955年左右以来，所有4个湖泊中的硅藻组合物都变得越来越不相似，这表明群落尚未从气候的一级影响中稳定下来。因此，与对鱼类群落的操纵相比，气候可能对硅藻群落结构的影响更大。了解非生物和生物胁迫源之间的相对重要性和相互影响以及生态系统的弹性，为湖泊的适应性管理提供了启示。