Seasonal measurements of the nitrogenous osmolyte glycine betaine in marine temperate coastal waters
Seasonal measurements of the nitrogenous osmolyte glycine betaine in marine temperate coastal waters
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海洋温带沿海水域含氮渗透剂甘氨酸甜菜碱的季节性测量
DOI：
10.1007/s10533-022-01006-7
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发表时间：
2022
期刊：
影响因子：
4
通讯作者：
Airs R
中科院分区：
文献类型：
--
作者：
Airs R
甘氨酸甜菜碱（GBT）是一种广泛存在于海洋环境中的含氮渗透剂。尽管它在微生物循环中广泛存在并具有重要意义，但缺乏对该化合物季节性的了解。在这里，我们提出了一个季节性数据集的GBT浓度在海洋悬浮颗粒物。分析沿海沃茨在西英吉利海峡，GBT在夏季和秋季达到高峰，但没有遵循观察到的最大浮游植物生物量或叶绿素。相反，我们发现的证据表明，GBT浓度与特定的浮游植物群体或物种，特别是在夏季GBT与甲藻生物量相关。与此相反，秋季最大值对应的一个时期的快速变化的盐度和营养物质的可用性，与一些浮游植物物种和Harpacticoid桡足类的潜在贡献。这表明GBT季节性的不同时期有不同的环境驱动因素。GBT和甲藻生物量的高峰在夏季，伴随着低营养物质的证据的基础上，我们建议，GBT积极影响甲藻健身，使他们能够胜过其他浮游生物时，无机营养物质耗尽。通过使用这一假设，我们改进了海洋生态系统模型的性能，重现了所观察到的从春季到夏季的过渡期甲藻生物量的增加。这项工作揭示了浮游植物演替，竞争优势和不断变化的环境因素与气候变化之间的相互作用。它为未来的多学科研究铺平了道路，旨在了解腰鞭毛虫在关键沿海生态系统中的重要性及其对甲胺生产的潜在意义，这些化合物与大气化学中的颗粒物生长有关。
Glycine betaine (GBT) is a nitrogenous osmolyte ubiquitous throughout the marine environment. Despite its widespread occurrence and significance in microbial cycling, knowledge of the seasonality of this compound is lacking. Here, we present a seasonal dataset of GBT concentrations in marine suspended particulate material. Analysing coastal waters in the Western English Channel, GBT peaked in summer and autumn but did not follow the observed maxima in total phytoplankton biomass or chlorophylla. Instead, we found evidence that GBT concentrations were associated with specific phytoplankton groups or species, particularly in the summer when GBT correlated with dinoflagellate biomass. In contrast, autumn maxima corresponded with a period of rapidly changing salinity and nutrient availability, with potential contributions from some phytoplankton species and Harpacticoid copepods. This suggests distinct environmental drivers for different periods of the GBT seasonality. Building on evidence that GBT and dinoflagellate biomass peak in summer, concomitantly with low nutrients, we propose that GBT positively affects dinoflagellate fitness, allowing them to outcompete other plankton when inorganic nutrients are depleted. By using this assumption, we improved the performance of a marine ecosystem model to reproduce the observed increase in dinoflagellates biomass in the transition from spring to summer. This work sheds light on the interplay between phytoplankton succession, competitive advantage and changing environmental factors relevant to climate change. It paves the way for future multidisciplinary research aiming to understand the importance of dinoflagellates in key coastal ecosystems and their potential significance for methylamine production, compounds relevant for particle growth in atmospheric chemistry.
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影响因子：
5.2
作者：
Zecher K;Hayes KR;Philipp B
通讯作者：
Philipp B
影响因子：
2.4
作者：
Keller, MD;Kiene, RP;Bellows, WK
通讯作者：
Bellows, WK
影响因子：
5.1
作者：
Boysen, Angela K.;Durham, Bryndan P.;Kumler, William;Key, Rebecca S.;Heal, Katherine R.;Carlson, Laura T.;Groussman, Ryan D.;Armbrust, E. Virginia;Ingalls, Anitra E.
通讯作者：
Ingalls, Anitra E.
沿海环境中模拟的二氧化碳海气通量对地表温度梯度、表面活性剂和卫星数据同化的敏感性
DOI：
10.3390/rs12122038
发表时间：
2020
期刊：
Remote. Sens.
影响因子：
--
作者：
Ricardo Torres;Y. Artioli;V. Kitidis;S. Ciavatta;M. Ruíz;J. Shutler;L. Polimene;V. Martinez;C. Widdicombe;E. Woodward;T. Smyth;J. Fishwick;G. Tilstone
通讯作者：
G. Tilstone
影响因子：
6.2
作者：
Beale, Rachael;Airs, Ruth
通讯作者：
Airs, Ruth