气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and variation in community development

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.881077
	Seawater carbonate chemistry and variation in community development
	Kroeker; Kristy J; Micheli; Fiorenza; Gambi; Maria Cristina
发布日期	2017-09-28
数据集类型	dataset
英文关键词	Benthos ; CO2 vent ; Coast and continental shelf ; Community composition and diversity ; Entire community ; Field observation ; Growth/Morphology ; Mediterranean Sea ; Rocky-shore community ; Temperate
英文简介	Ocean acidification represents a pervasive environmental change that is predicted to affect a wide range of species, yet our understanding of the emergent ecosystem impacts is very limited. Many studies report detrimental effects of acidification on single species in lab studies, especially those with calcareous shells or skeletons. Observational studies using naturally acidified ecosystems have shown profound shifts away from such calcareous species, and there has been an assumption that direct impacts of acidification on sensitive species drive most ecosystem responses. We tested an alternative hypothesis that species interactions attenuate or amplify the direct effects of acidification on individual species. Here, we show that altered competitive dynamics between calcareous species and fleshy seaweeds drive significant ecosystem shifts in acidified conditions. Although calcareous species recruited and grew at similar rates in ambient and low pH conditions during early successional stages, they were rapidly overgrown by fleshy seaweeds later in succession in low pH conditions. The altered competitive dynamics between calcareous species and fleshy seaweeds is probably the combined result of decreased growth rates of calcareous species, increased growth rates of fleshy seaweeds, and/or altered grazing rates. Phase shifts towards ecosystems dominated by fleshy seaweed are common in many marine ecosystems, and our results suggest that changes in the competitive balance between these groups represent a key leverage point through which the physiological responses of individual species to acidification could indirectly lead to profound ecosystem changes in an acidified ocean.
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/216421
推荐引用方式 GB/T 7714	Kroeker,Kristy J,Micheli,et al. Seawater carbonate chemistry and variation in community development.2017-09-28.https://doi.org/10.1594/PANGAEA.881077.