Civil and Environmental Engineering, University of Houston, Houston, TX, USA.
Chemical and Biomolecular Engineering, University of Houston, Houston, TX, USA.
Mar Pollut Bull. 2022 Feb;175:113359. doi: 10.1016/j.marpolbul.2022.113359. Epub 2022 Feb 3.
Estuaries experience variable physicochemical conditions, especially after hurricanes and due to anthropogenic sources of pollution. Their microbial communities are not as well understood in terms of community structure and diversity, particularly in response to stresses from pollution and severe events. This study presents a 16S rRNA-based description of sediment microbial communities in the Houston Ship Channel-Galveston Bay estuary after Hurricane Harvey in 2017. A total of 11 sites were sampled, and microbial genomic DNA was isolated from sediment. The presence and abundance of specific bacterial and archaeal taxa in the sediment indicated pollutant inputs from identified legacy sources. The abundance of certain microbial groups was explained by the mobilization of contaminated sediment and sediment transport due to Harvey. Several microorganisms involved in the biodegradation of xenobiotics were observed. The spatial occurrence of Dehalococcoidia, a degrader of persistent polychlorinated compounds, was explained in relation to sediment properties and contaminant concentrations.
河口经历着多变的理化条件，尤其是在飓风之后，并且还受到人为污染源的影响。就其群落结构和多样性而言，河口的微生物群落还没有得到很好的理解，特别是在应对污染和严重事件带来的压力方面。本研究基于 16S rRNA 对 2017 年哈维飓风过后休斯顿航道-加尔维斯顿湾河口的沉积物微生物群落进行了描述。共采集了 11 个地点的样本，并从沉积物中提取微生物基因组 DNA。沉积物中特定细菌和古菌类群的存在和丰度表明存在来自已识别的遗留污染源的污染物输入。由于哈维飓风的影响，某些微生物群的丰度与受污染沉积物的迁移和沉积物输运有关。观察到一些参与异生物质生物降解的微生物。与底泥性质和污染物浓度有关，解释了持久性多氯联苯降解菌 Dehalococcoidia 的空间分布。
