Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14311 |
The "isohydric trap": A proposed feedback between water shortage, stomatal regulation, and nutrient acquisition drives differential growth and survival of European pines under climatic dryness | |
Salazar-Tortosa, Diego1; Castro, Jorge1; Villar-Salvador, Pedro2; Vinegla, Benjamin3; Matias, Luis3; Michelsen, Anders4; Rubio de Casas, Rafael1; Querejeta, Jose I.5 | |
2018-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:9页码:4069-4083 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; Denmark |
英文摘要 | sition (C-13, O-18), and nutrient concentrations (C, N, P, K, Zn, Cu). After 2years, the Mediterranean species Pinus h Climatic dryness imposes limitations on vascular plant growth by reducing stomatal conductance, thereby decreasing CO2 uptake and transpiration. Given that transpiration-driven water flow is required for nutrient uptake, climatic stress-induced nutrient deficit could be a key mechanism for decreased plant performance under prolonged drought. We propose the existence of an "isohydric trap," a dryness-induced detrimental feedback leading to nutrient deficit and stoichiometry imbalance in strict isohydric species. We tested this framework in a common garden experiment with 840 individuals of four ecologically contrasting European pines (Pinus halepensis, P.nigra, P.sylvestris, and P.uncinata) at a site with high temperature and low soil water availability. We measured growth, survival, photochemical efficiency, stem water potentials, leaf isotopic compoalepensis showed lower O-18 and higher C-13 values than the other species, indicating higher time-integrated transpiration and water-use efficiency (WUE), along with lower predawn and midday water potentials, higher photochemical efficiency, higher leaf P, and K concentrations, more balanced N:P and N:K ratios, and much greater dry-biomass (up to 63-fold) and survival (100%). Conversely, the more mesic mountain pine species showed higher leaf O-18 and lower C-13, indicating lower transpiration and WUE, higher water potentials, severe P and K deficiencies and N:P and N:K imbalances, and poorer photochemical efficiency, growth, and survival. These results support our hypothesis that vascular plant species with tight stomatal regulation of transpiration can become trapped in a feedback cycle of nutrient deficit and imbalance that exacerbates the detrimental impacts of climatic dryness on performance. This overlooked feedback mechanism may hamper the ability of isohydric species to respond to ongoing global change, by aggravating the interactive impacts of stoichiometric imbalance and water stress caused by anthropogenic N deposition and hotter droughts, respectively. |
英文关键词 | climatic change hotter drought nutrients stable isotopes stoichiometry stomatal behaviour water use efficiency |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441746900016 |
WOS关键词 | DROUGHT-INDUCED TREE ; CARBON-ISOTOPE DISCRIMINATION ; PHYSIOLOGICAL-MECHANISMS ; STABLE OXYGEN ; GLOBAL CHANGE ; MORTALITY ; STOICHIOMETRY ; POTASSIUM ; FOREST ; PHOTOSYNTHESIS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17591 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Granada, Fac Ciencias, Dept Ecol, Av Fuentenueva SN, E-18071 Granada, Spain; 2.Univ Alcala De Henares, Dept Ciencias Vida, Forest Ecol & Restorat Grp, Madrid, Spain; 3.Univ Jaen, Fac Ciencias Expt, Dept Biol Anim Biol Vegetal & Ecol, Jaen, Spain; 4.Univ Copenhagen, Dept Biol, Terr Ecol Sect, Copenhagen O, Denmark; 5.CSIC, CEBAS, Murcia, Spain |
推荐引用方式 GB/T 7714 | Salazar-Tortosa, Diego,Castro, Jorge,Villar-Salvador, Pedro,et al. The "isohydric trap": A proposed feedback between water shortage, stomatal regulation, and nutrient acquisition drives differential growth and survival of European pines under climatic dryness[J]. GLOBAL CHANGE BIOLOGY,2018,24(9):4069-4083. |
APA | Salazar-Tortosa, Diego.,Castro, Jorge.,Villar-Salvador, Pedro.,Vinegla, Benjamin.,Matias, Luis.,...&Querejeta, Jose I..(2018).The "isohydric trap": A proposed feedback between water shortage, stomatal regulation, and nutrient acquisition drives differential growth and survival of European pines under climatic dryness.GLOBAL CHANGE BIOLOGY,24(9),4069-4083. |
MLA | Salazar-Tortosa, Diego,et al."The "isohydric trap": A proposed feedback between water shortage, stomatal regulation, and nutrient acquisition drives differential growth and survival of European pines under climatic dryness".GLOBAL CHANGE BIOLOGY 24.9(2018):4069-4083. |
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