气候变化领域集成服务门户(CCPortal): Functional redundancy facilitates resilience of subarctic phytoplankton assemblages toward ocean acidification and high irradiance, link to supplement in MS Excel format

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DOI	https://doi.org/10.1594/PANGAEA.878253
	Functional redundancy facilitates resilience of subarctic phytoplankton assemblages toward ocean acidification and high irradiance, link to supplement in MS Excel format
	Hoppe; Clara Jule Marie; Schuback; Nina; Semeniuk; David M; Maldonado; Maria T; Rost; Björn
发布日期	2017-07-26
数据集类型	dataset
英文简介	In order to understand how ocean acidification (OA) and enhanced irradiance levels might alter phytoplankton eco-physiology, productivity and species composition, we conducted an incubation experiment with a natural plankton assemblage from sub-surface Subarctic waters (Davis Strait, 63°N). The phytoplankton assemblage was exposed to 380 and 1,000 µatm pCO2 at both 15 and 35% surface irradiance over 2 weeks. The incubations were monitored and characterized in terms of their photo-physiology, biomass stoichiometry, primary production and dominant phytoplankton species. We found that the phytoplankton assemblage exhibited pronounced high-light stress in the first days of the experiment (20-30% reduction in photosynthetic efficiency, Fv/Fm). This stress signal was more pronounced when grown under OA and high light, indicating interactive effects of these environmental variables. Primary production in the high light treatments was reduced by 20% under OA compared to ambient pCO2 levels. Over the course of the experiment, the assemblage fully acclimated to the applied treatments, achieving similar bulk characteristics (e.g., net primary production and elemental stoichiometry) under all conditions. We did, however, observe a pCO2-dependent shift in the dominant diatom species, with Pseudonitzschia sp. dominating under low and Fragilariopsis sp. under high pCO2 levels. Our results indicate an unexpectedly high level of resilience of Subarctic phytoplankton to OA and enhanced irradiance levels. The co-occurring shift in dominant species suggests functional redundancy to be an important, but so-far largely overlooked mechanism for resilience toward climate change.
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/216454
推荐引用方式 GB/T 7714	Hoppe,Clara Jule Marie,Schuback,et al. Functional redundancy facilitates resilience of subarctic phytoplankton assemblages toward ocean acidification and high irradiance, link to supplement in MS Excel format.2017-07-26.https://doi.org/10.1594/PANGAEA.878253.