Phytoplankton subsidies to the inter-tidal zone are strongly affected by surf-zone hydrodynamics
Phytoplankton subsidies to the inter-tidal zone are strongly affected by surf-zone hydrodynamics
复制标题
对潮间带的浮游植物补贴受到冲浪区水动力的强烈影响
DOI：
10.1111/maec.12441
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
L. Johnson
中科院分区：
文献类型：
--
作者：
A. Shanks;P. Sheesley;L. Johnson
来自海洋的自下而上的补贴、食物和幼虫的规模对潮间带社区和人口有着深远的影响。沿岸补贴的变化归因于沿海条件的变化，但也可能是由于冲浪区水动力的变化。我们通过比较冲浪区浮游植物浓度与冲浪区水动力（如冲浪区宽度所示）来检验这一假设。为了最大限度地减少沿海浮游植物丰度变化的潜在影响，我们在短时间内（3 天）对间隔很近的地点（中位间隔 1 公里）进行了采样。沿海浮游植物类群（例如角毛藻属、拟菱形藻属和甲藻）的冲浪区浓度随冲浪区宽度而变化； 65% 到 94% 的浓度变化可以通过冲浪区宽度来解释。在冲浪区狭窄且反射性更强的地方，浮游植物的浓度比更宽、耗散性更强的冲浪区低一到几个数量级。间隔最近的站点相距 30 m，但代表了不同的栖息地 - 反射区和耗散性更强的冲浪区。反射性冲浪区的浮游植物浓度比邻近的耗散性较高的冲浪区低一个数量级或更低。对已发表的浮游植物补贴研究的重新分析发现了类似的结果。冲浪区水动力的沿岸变化似乎是潮间带浮游植物补贴的重要驱动因素。
The size of bottom-up subsidies, food and larvae, from the ocean has a profound impact on inter-tidal communities and populations. Alongshore variations in subsidies are attributed to variation in coastal conditions, but also might be due to variations in surf-zone hydrodynamics. We tested this hypothesis by comparing surf-zone phytoplankton concentrations to surf-zone hydrodynamics as indicated by the width of the surf zones. To minimize the potential effects of alongshore variation in phytoplankton abundance in the coastal ocean, we sampled closely spaced sites (median separation 1 km) over short periods (3 days). Surf-zone concentrations of coastal phytoplankton taxa (e.g. Chaetoceros spp., Pseudo-nitzschia spp. and dinoflagellates) varied with surf-zone width; 65% to 94% of the variability in their concentration is explained by surf-zone width. Where surf zones were narrow and more reflective, phytoplankton concentrations were one to several orders of magnitude lower than in wider, more dissipative surf zones. The most closely spaced stations were 30 m apart, but represented distinct habitats – a reflective and a more dissipative surf zone. Phytoplankton concentrations in the reflective surf zone were an order of magnitude or more lower than in the adjacent more dissipative surf zone. A reanalysis of a published study on phytoplankton subsidies found similar results. Alongshore variation in surf-zone hydrodynamics appears to be an important driver of phytoplankton subsidies to the inter-tidal zone.
影响因子：
2.9
作者：
J. MacMahan;Jeff L. Brown;Jenna A. Brown;E. Thornton;A. Reniers;T. Stanton;M. Henriquez;E. Gallagher;J. Morrison;M. Austin;T. Scott;N. Sénéchal
通讯作者：
J. MacMahan;Jeff L. Brown;Jenna A. Brown;E. Thornton;A. Reniers;T. Stanton;M. Henriquez;E. Gallagher;J. Morrison;M. Austin;T. Scott;N. Sénéchal