气候变化领域集成服务门户(CCPortal): Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.833844
	Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent
	Apostolaki; Eugenia; Vizzini; Salvatrice; Hendriks; Iris; Olsen; Ylva
发布日期	2014-07-08
数据集类型	dataset
英文关键词	Benthos ; Biomass/Abundance/Elemental composition ; CO2 vent ; Coast and continental shelf ; Cymodocea nodosa ; Entire community ; Field observation ; Mediterranean Sea ; Primary production/Photosynthesis ; Respiration ; Soft-bottom community ; Temperate
英文简介	We examined the long-term effect of naturally acidified water on a Cymodocea nodosa meadow growing at a shallow volcanic CO2 vent in Vulcano Island (Italy). Seagrass and adjacent unvegetated habitats growing at a low pH station (pH = 7.65 ± 0.02) were compared with corresponding habitats at a control station (pH = 8.01 ± 0.01). Density and biomass showed a clear decreasing trend at the low pH station and the below- to above-ground biomass ratio was more than 10 times lower compared to the control. C content and delta 13C of leaves and epiphytes were significantly lower at the low pH station. Photosynthetic activity of C. nodosa was stimulated by low pH as seen by the significant increase in Chla content of leaves, maximum electron transport rate and compensation irradiance. Seagrass community metabolism was intense at the low pH station, with significantly higher net community production, respiration and gross primary production than the control community, whereas metabolism of the unvegetated community did not differ between stations. Productivity was promoted by the low pH, but this was not translated into biomass, probably due to nutrient limitation, grazing or poor environmental conditions. The results indicate that seagrass response in naturally acidified conditions is dependable upon species and geochemical characteristics of the site and highlight the need for a better understanding of complex interactions in these environments.
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/217420
推荐引用方式 GB/T 7714	Apostolaki,Eugenia,Vizzini,et al. Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent.2014-07-08.https://doi.org/10.1594/PANGAEA.833844.