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Differential responses of canopy nutrients to experimental drought along a natural aridity gradient.
Luo, Wentao; Zuo, Xiaoan; Ma, Wang; Xu, Chong; Li, Ang; Yu, Qiang; Knapp, Alan K; Tognetti, Roberto; Dijkstra, Feike A; Li, Mai-He; Han, Guodong; Wang, Zhengwen; Han, Xingguo.
Afiliación
  • Luo W; Erguna Forest-Steppe Ecotone Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164, China.
  • Zuo X; Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou, 730000, China.
  • Ma W; Erguna Forest-Steppe Ecotone Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164, China.
  • Xu C; National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 10008, China.
  • Li A; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
  • Yu Q; National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 10008, China.
  • Knapp AK; Graduate Degree Program in Ecology and Department of Biology, Colorado State University, Fort Collins, Colorado, 80523, USA.
  • Tognetti R; Dipartimento di Agraria, Ambiente e Alimenti, Università del Molise, Campobasso, 86090, Italy.
  • Dijkstra FA; European Forest Institute (EFI) Project Centre on Mountain Forests (MOUNTFOR), San Michele all'Adige, 38010, Italy.
  • Li MH; Sydney Institute of Agriculture, School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, 2006, Australia.
  • Han G; Erguna Forest-Steppe Ecotone Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164, China.
  • Wang Z; Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, CH-8903, Switzerland.
  • Han X; College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot, 010018, China.
Ecology ; 99(10): 2230-2239, 2018 10.
Article en En | MEDLINE | ID: mdl-30157292
The allocation and stoichiometry of plant nutrients in leaves reflect fundamental ecosystem processes, biotic interactions, and environmental drivers such as water availability. Climate change will lead to increases in drought severity and frequency, but how canopy nutrients will respond to drought, and how these responses may vary with community composition along aridity gradients is poorly understood. We experimentally addressed this issue by reducing precipitation amounts by 66% during two consecutive growing seasons at three sites located along a natural aridity gradient. This allowed us to assess drought effects on canopy nitrogen (N) and phosphorus (P) concentrations in arid and semiarid grasslands of northern China. Along the aridity gradient, canopy nutrient concentrations were positively related to aridity, with this pattern was driven primarily by species turnover (i.e., an increase in the relative biomass of N- and P-rich species with increasing aridity). In contrast, drought imposed experimentally increased N but decreased P concentrations in plant canopies. These changes were driven by the combined effects of species turnover and intraspecific variation in leaf nutrient concentrations. In addition, the sensitivity of canopy N and P concentrations to drought varied across the three sites. Canopy nutrient concentrations were less affected by drought at drier than wetter sites, because of the opposing effects of species turnover and intraspecific variation, as well as greater drought tolerance for nutrient-rich species. These contrasting effects of long-term aridity vs. short-term drought on canopy nutrient concentrations, as well as differing sensitivities among sites in the same grassland biome, highlight the challenge of predicting ecosystem responses to future climate change.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ecosistema / Sequías País/Región como asunto: Asia Idioma: En Revista: Ecology Año: 2018 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ecosistema / Sequías País/Región como asunto: Asia Idioma: En Revista: Ecology Año: 2018 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos