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Planktonic to sessile: drivers of spatial and temporal variability across barnacle life stages and indirect effects of the Pacific Marine Heatwave

藤壶 远洋带 潮间带 底栖区 浮游生物 生态学 丰度(生态学) 底栖生物 海洋学 生物 幼虫 环境科学 地质学
作者
Sarah B. Traiger,James L. Bodkin,Robert W. Campbell,Heather A. Coletti,Daniel Esler,Kris Holderied,Katrin Iken,Brenda Konar,Caitlin McKinstry,Daniel H. Monson,Jules Pretty,Martin Renner,Brian H. Robinson,Robert M. Suryan,Benjamin P. Weitzman
出处
期刊:Journal of Plankton Research [Oxford University Press]
卷期号:46 (6): 604-618
标识
DOI:10.1093/plankt/fbae059
摘要

ABSTRACT Barnacles are a foundation species in intertidal habitats. During the Pacific Marine Heatwave (PMH), intertidal barnacle cover increased in the northern Gulf of Alaska (GoA); however, the role of pelagic larval supply in this increase was unknown. Using long-term monitoring data on intertidal benthic (percent cover) and pelagic larval populations (nauplii and cyprid concentrations), we examined potential environmental drivers (temperature, chlorophyll-a, mixed layer depth) of larval concentration and whether including larval concentration at regional and annual scales improved intertidal barnacle percent cover models in two study regions in the GoA. In both regions, larval concentrations were slightly higher following the PMH. Percent cover models were improved by including cyprid concentrations (but not nauplii), and the effect strength varied by site and tidal elevation. This indicates that larval concentration contributes as a bottom–up driver of benthic barnacle abundance. There is little evidence of a direct effect of the PMH on either life stage. Instead, our results may illustrate the positive feedback between life stages, where higher adult benthic abundance increased larval concentrations, which then supplied more new recruits to the benthos. As heatwaves continue to occur, integrating various data types can provide insights into factors influencing both benthic and pelagic communities.

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