气候变化领域集成服务门户(CCPortal): Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.849401
	Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta
	Iñiguez; Concepcion; Carmona; Raquel; Lorenzo; M Rosario; Niell; F Xavier; Wiencke; Christian; Gordillo; Francisco J L
发布日期	2016-01-29
数据集类型	dataset
英文关键词	Alaria esculenta ; Arctic ; Benthos ; Biomass/Abundance/Elemental composition ; Bottles or small containers/Aquaria ( 20 L) ; Chromista ; Coast and continental shelf ; Desmarestia aculeata ; Laboratory experiment ; Macroalgae ; Ochrophyta ; Polar ; Primary production/Photosynthesis ; Respiration ; Single species
英文简介	Ocean acidification affects with special intensity Arctic ecosystems, being marine photosynthetic organisms a primary target, although the consequences of this process in the carbon fluxes of Arctic algae are still unknown. The alteration of the cellular carbon balance due to physiological acclimation to an increased CO2 concentration (1300 ppm) in the common Arctic brown seaweeds Desmarestia aculeata and Alaria esculenta from Kongsfjorden (Svalbard) was analysed. Growth rate of D. aculeata was negatively affected by CO2 enrichment, while A. esculenta was positively affected, as a result of a different reorganization of the cellular carbon budget in both species. Desmarestia aculeata showed increased respiration, enhanced accumulation of storage biomolecules and elevated release of dissolved organic carbon, whereas A. esculenta showed decreased respiration and lower accumulation of storage biomolecules. Gross photosynthesis (measured both as O2 evolution and 14C fixation) was not affected in any of them, suggesting that photosynthesis was already saturated at normal CO2 conditions and did not participate in the acclimation response. However, electron transport rate changed in both species in opposite directions, indicating different energy requirements between treatments and species specificity. High CO2 levels also affected the N-metabolism, and 13C isotopic discrimination values from algal tissue pointed to a deactivation of carbon concentrating mechanisms. Since increased CO2 has the potential to modify physiological mechanisms in different ways in the species studied, it is expected that this may lead to changes in the Arctic seaweed community, which may propagate to the rest of the food web.
空间范围	Latitude: 78.916670 * Longitude: 11.933330
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/216967
推荐引用方式 GB/T 7714	Iñiguez,Concepcion,Carmona,et al. Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta.2016-01-29.https://doi.org/10.1594/PANGAEA.849401.