气候变化领域集成服务门户(CCPortal): Adaptive variability to low-pH river discharges in Acartia tonsa and stress responses to high PCO2 conditions

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.848689
	Adaptive variability to low-pH river discharges in Acartia tonsa and stress responses to high PCO2 conditions
	Aguilera; Victor M; Vargas; C A; Lardies; Marco A; Poupin; Maria J
发布日期	2015-08-18
数据集类型	dataset
英文关键词	Acartia tonsa ; Animalia ; Arthropoda ; Behaviour ; Bottles or small containers/Aquaria ( 20 L) ; Brackish waters ; Estuary ; Field observation ; Gene expression (incl. proteomics) ; Laboratory experiment ; Pelagos ; Single species ; South Pacific ; Temperate ; Zooplankton
英文简介	Environmental transitions leading to spatial physical-chemical gradients are of ecological and evolutionary interest because they are able to induce variations in phenotypic plasticity. Thus, the adaptive variability to low-pH river discharges may drive divergent stress responses [ingestion rates (IR) and expression of stress-related genes such as Heat shock protein 70 (Hsp70) and Ferritin] in the neritic copepod Acartia tonsa facing changes in the marine chemistry associated to ocean acidification (OA). These responses were tested in copepod populations inhabiting two environments with contrasting carbonate system parameters (an estuarine versus coastal area) in the Southern Pacific Ocean, and assessing an in situ and 96-h experimental incubation under conditions of high pressure of CO2 (PCO2 1200 ppm). Adaptive variability was a determining factor in driving variability of copepods' responses. Thus, the food-rich but colder and corrosive estuary induced a traits trade-off expressed as depressed IR under in situ conditions. However, this experience allowed these copepods to tolerate further exposure to high PCO2 levels better, as their IRs were on average 43% higher than those of the coastal individuals. Indeed, expression of both the Hsp70 and Ferritin genes in coastal copepods was significantly higher after acclimation to high PCO2 conditions. Along with other recent evidence, our findings confirm that adaptation to local fluctuations in seawater pH seems to play a significant role in the response of planktonic populations to OA-associated conditions. Facing the environmental threat represented by the inter-play between multiple drivers of climate change, this biological feature should be examined in detail as a potential tool for risk mitigation policies in coastal management arrangements.
空间范围	Latitude: -39.833330 * Longitude: -73.416670
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/216980
推荐引用方式 GB/T 7714	Aguilera,Victor M,Vargas,et al. Adaptive variability to low-pH river discharges in Acartia tonsa and stress responses to high PCO2 conditions.2015-08-18.https://doi.org/10.1594/PANGAEA.848689.