Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/ece3.2074 |
Photosynthesis and growth reduction with warming are driven by nonstomatal limitations in a Mediterranean semi-arid shrub | |
Leon-Sanchez, Lupe1; Nicolas, Emilio1; Nortes, Pedro A.1; Maestre, Fernando T.2; Querejeta, Jose I.1 | |
通讯作者 | Querejeta, Jose I. |
来源期刊 | ECOLOGY AND EVOLUTION
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ISSN | 2045-7758 |
出版年 | 2016 |
卷号 | 6期号:9页码:2725-2738 |
英文摘要 | Whereas warming enhances plant nutrient status and photosynthesis in most terrestrial ecosystems, dryland vegetation is vulnerable to the likely increases in evapotranspiration and reductions in soil moisture caused by elevated temperatures. Any warming-induced declines in plant primary production and cover in drylands would increase erosion, land degradation, and desertification. We conducted a four-year manipulative experiment in a semi-arid Mediterranean ecosystem to evaluate the impacts of a similar to 2 degrees C warming on the photosynthesis, transpiration, leaf nutrient status, chlorophyll content, isotopic composition, biomass growth, and postsummer survival of the native shrub Helianthemum squamatum. We predicted that warmed plants would show reduced photosynthetic activity and growth, primarily due to the greater stomatal limitation imposed by faster and more severe soil drying under warming. On average, warming reduced net photosynthetic rates by 36% across the study period. Despite this strong response, warming did not affect stomatal conductance and transpiration. The reduction of peak photosynthetic rates with warming was more pronounced in a drought year than in years with near-average rainfall (75% and 25-40% reductions relative to controls, respectively), with no indications of photosynthetic acclimation to warming through time. Warmed plants had lower leaf N and P contents, delta C-13, and sparser and smaller leaves than control plants. Warming reduced shoot dry mass production by 31%. However, warmed plants were able to cope with large reductions in net photosynthesis, leaf area, and shoot biomass production without changes in postsummer survival rates. Our findings highlight the key role of nonstomatal factors (biochemical and/or nutritional) in reducing net carbon assimilation rates and growth under warming, which has important implications for projections of plant carbon balance under the warmer and drier climatic scenario predicted for drylands worldwide. Projected climate warming over the coming decades could reduce net primary production by about one-third in semi-arid gypsum shrublands dominated by H. squamatum. |
英文关键词 | Climate change dryland ecosystems Helianthemum squamatum leaf trait plasticity plant nutrient status plant survival and growth plant-climate interactions stable isotopes |
类型 | Article |
语种 | 英语 |
国家 | Spain |
收录类别 | SCI-E |
WOS记录号 | WOS:000376149400008 |
WOS关键词 | OXYGEN-ISOTOPE COMPOSITION ; CLIMATE-CHANGE ; TEMPERATE STEPPE ; STOMATAL CONDUCTANCE ; NORTHERN-HEMISPHERE ; TERRESTRIAL PLANTS ; MYCORRHIZAL FUNGI ; CARBON ISOTOPES ; USE EFFICIENCY ; STABLE OXYGEN |
WOS类目 | Ecology ; Evolutionary Biology |
WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/192468 |
作者单位 | 1.CSIC, CEBAS, Campus Univ Espinardo,POB 164, E-30100 Murcia, Spain; 2.Univ Rey Juan Carlos, Dept Biol & Geol, Biodivers & Conservat Unit, Madrid 28933, Spain |
推荐引用方式 GB/T 7714 | Leon-Sanchez, Lupe,Nicolas, Emilio,Nortes, Pedro A.,et al. Photosynthesis and growth reduction with warming are driven by nonstomatal limitations in a Mediterranean semi-arid shrub[J],2016,6(9):2725-2738. |
APA | Leon-Sanchez, Lupe,Nicolas, Emilio,Nortes, Pedro A.,Maestre, Fernando T.,&Querejeta, Jose I..(2016).Photosynthesis and growth reduction with warming are driven by nonstomatal limitations in a Mediterranean semi-arid shrub.ECOLOGY AND EVOLUTION,6(9),2725-2738. |
MLA | Leon-Sanchez, Lupe,et al."Photosynthesis and growth reduction with warming are driven by nonstomatal limitations in a Mediterranean semi-arid shrub".ECOLOGY AND EVOLUTION 6.9(2016):2725-2738. |
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