气候变化领域集成服务门户(CCPortal): Effects of in situ CO2 enrichment on structural characteristics, photosynthesis, and growth of the Mediterranean seagrass Posidonia oceanica

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.862529
	Effects of in situ CO2 enrichment on structural characteristics, photosynthesis, and growth of the Mediterranean seagrass Posidonia oceanica
	Cox; T Erin; Gazeau; Frédéric; Alliouane; Samir; Hendriks; Iris; Mahacek; Paul; Le Fur; Arnaud; Gattuso; Jean-Pierre
发布日期	2016-07-04
数据集类型	dataset
英文关键词	Benthos ; Biomass/Abundance/Elemental composition ; Coast and continental shelf ; Field experiment ; Growth/Morphology ; Mediterranean Sea ; Mesocosm or benthocosm ; Peyssonnelia sp. ; Plantae ; Posidonia oceanica ; Primary production/Photosynthesis ; Respiration ; Seagrass ; Single species ; Temperate ; Tracheophyta
英文简介	Seagrass is expected to benefit from increased carbon availability under future ocean acidification. This hypothesis has been little tested by in situ manipulation. To test for ocean acidification effects on seagrass meadows under controlled CO2/pH conditions, we used a Free Ocean Carbon Dioxide Enrichment (FOCE) system which allows for the manipulation of pH as continuous offset from ambient. It was deployed in a Posidonia oceanica meadow at 11 m depth in the Northwestern Mediterranean Sea. It consisted of two benthic enclosures, an experimental and a control unit both 1.7 m3, and an additional reference plot in the ambient environment (2 m2) to account for structural artifacts. The meadow was monitored from April to November 2014. The pH of the experimental enclosure was lowered by 0.26 pH units for the second half of the 8-month study. The greatest magnitude of change in P. oceanica leaf biometrics, photosynthesis, and leaf growth accompanied seasonal changes recorded in the environment and values were similar between the two enclosures. Leaf thickness may change in response to lower pH but this requires further testing. Results are congruent with other short-term and natural studies that have investigated the response of P. oceanica over a wide range of pH. They suggest any benefit from ocean acidification, over the next century (at a pH of 7.7 on the total scale), on Posidonia physiology and growth may be minimal and difficult to detect without increased replication or longer experimental duration. The limited stimulation, which did not surpass any enclosure or seasonal effect, casts doubts on speculations that elevated CO2 would confer resistance to thermal stress and increase the buffering capacity of meadows.
空间范围	Latitude: 43.678830 * Longitude: 7.323170
时间范围	2014-04-01T00:00:00 - 2014-11-30T00:00:00
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/216817
推荐引用方式 GB/T 7714	Cox,T Erin,Gazeau,et al. Effects of in situ CO2 enrichment on structural characteristics, photosynthesis, and growth of the Mediterranean seagrass Posidonia oceanica.2016-07-04.https://doi.org/10.1594/PANGAEA.862529.