干旱区生态环境知识资源中心(Arid): Increase in Growth and Alteration of C:N Ratios of Avicennia marina and Rhizophora stylosa Subject to Elevated CO2 Concentrations and Longer Tidal Flooding Duration

Arid

DOI	10.3389/fevo.2019.00098
	Increase in Growth and Alteration of C:N Ratios of Avicennia marina and Rhizophora stylosa Subject to Elevated CO2 Concentrations and Longer Tidal Flooding Duration
	Jacotot, Adrien 1,2,3; Marchand, Cyril 1,2; Allenbach, Michel 2
通讯作者	Marchand, Cyril
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
ISSN	2296-701X
出版年	2019
卷号	7
英文摘要	We investigated the effects of elevated CO2 concentrations and longer tidal flooding duration on two-year-old Avicennia marina and Rhizophora stylosa seedlings for a full year. The seedlings were grown in greenhouses for ambient CO2 (400 ppm) and in enclosed CO2-controlled chambers, which were installed inside the greenhouses for elevated CO2 (800 ppm). The tidal flooding duration was set-up according to the species distribution in the intertidal zone in New Caledonia for the controlled treatment and was increased by 1 h 45min for the experimental treatment. A total of 400 A. marina and 720 R. stylosa were monitored during this experiment. We measured heights and basal diameters of all seedlings every 90 days, and we determined the above and below ground biomass at the end of the experiment. Our results showed that elevated CO2 increased the growth rates of both A. marina and R. stylosa, for which the final biomass was, respectively, 46 and 32% higher than in the ambient CO2 treatment. We suggest that this increase was driven by a stimulation of photosynthesis under elevated CO2, as demonstrated in a previous study. Considering the tidal flooding duration treatment, we observed a contrasted effect between the species. Longer tidal flooding increased the growth of A. marina, whereas it reduced the growth of R. stylosa in comparison to the controlled treatment. This result may be related to the specific ecosystem zonation in this semi-arid climate, which limits water inputs into the Avicennia zone that increases the salt concentration in the soil, whereas Rhizophora is regularly submerged by tides due to its lower position in the intertidal zone. As a result, the combination of both treatments had a positive cumulative effect on the growth of A. marina. Although it was not the case for R. stylosa, the negative effect of longer tidal flooding on this species did not suppress the enhancement of growth resulting from elevated CO2 concentrations. At the end of the experiment, elevated CO2 increased the C:Nratios of the seedlings, thereby producing a more refractory organic matter, which will potentially result in lower decomposition rates and thus may increase carbon accumulation in mangrove soils. These results suggest that future climate changes may enhance the productivity of mangrove seedlings by increasing their growth, which may in turn increase the carbon storage potential of mangroves in their biomass.
英文关键词	mangrove elevated CO2 sea-level rise growth biomass climate changes
类型	Article
语种	英语
国家	New Caledonia ; France
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000467430000001
WOS关键词	MANGROVE ECOSYSTEMS ; CLIMATE-CHANGE ; PLANT-GROWTH ; SEA-LEVEL ; TEMPERATURE SENSITIVITY ; NITROGEN CONCENTRATION ; LITTER DECOMPOSITION ; CARBON ; PRODUCTIVITY ; ENRICHMENT
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	French National Research Institute for Sustainable Development ; E17
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215757
作者单位	1.UPMC, CNRS, Inst Rech Dev, IMPMC,MNHN, Noumea, New Caledonia; 2.Univ Nouvelle Caedonie, ISEA, EA 7484, BPR4, Noumea, New Caledonia; 3.Univ Orleans, CNRS, ISTO, BRGM,UMR 7327, Orleans, France
推荐引用方式 GB/T 7714	Jacotot, Adrien,Marchand, Cyril,Allenbach, Michel. Increase in Growth and Alteration of C:N Ratios of Avicennia marina and Rhizophora stylosa Subject to Elevated CO2 Concentrations and Longer Tidal Flooding Duration[J]. French National Research Institute for Sustainable Development, E17,2019,7.
APA	Jacotot, Adrien,Marchand, Cyril,&Allenbach, Michel.(2019).Increase in Growth and Alteration of C:N Ratios of Avicennia marina and Rhizophora stylosa Subject to Elevated CO2 Concentrations and Longer Tidal Flooding Duration.FRONTIERS IN ECOLOGY AND EVOLUTION,7.
MLA	Jacotot, Adrien,et al."Increase in Growth and Alteration of C:N Ratios of Avicennia marina and Rhizophora stylosa Subject to Elevated CO2 Concentrations and Longer Tidal Flooding Duration".FRONTIERS IN ECOLOGY AND EVOLUTION 7(2019).