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linking leaf elemental traits to biomass across forest biomes in the Himalayas

science China earth sciences 2024年第5期67卷 1518-1528页

作者： Nita DYOlA eryuan lIANG Josep PeÑUelAs J.Julio CAMAReRO shalik ram.sIGDel sugam ARYAl Wentao lIN Xiang lIU Yongwen lIU Xingliang XU sergio ROssI state Key laboratory of Tibetan Plateau earth system Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of sciences Beijing 100049China laboratoire sur lesécosystèmes terrestres boréaux Département des Sciences FondamentalesUniversitédu QuébecàChicoutimi555Boulevard de l′UniversitéChicoutimi(QC)G7H2B1Canada CsIC Global Ecology Unit CREAF-CSIC-UABBellaterraE-08193 CataloniaSpain CReAF Cerdanyola del VallèsE-08193 CataloniaSpain Instituto Pirenaico de ecología(IPe-CsIC) Avenida Montañana 1005Zaragoza 50059Spain Friedrich-Alexander-Universität erlangen-Nürnberg Institut für GeographieErlangen 91058Germany state Key laboratory of Grassland Agro-ecosystems College of EcologyLanzhou UniversityLanzhou 730000China Key laboratory of ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Plants require a number of essential elements in different proportions for ensuring their growth and *** elemental concentrations in leaves reflect the functions and adaptations of plants under specific environmental ***,less is known about how the spectrum of leaf elements associated with resource acquisition,photosynthesis and growth regulates forest biomass along broad elevational *** examined the influence of leaf element distribution and diversity on forest biomass by analyzing ten elements(C,N,P,K,Ca,Mg,Zn,Fe,Cu,and Mn)in tree communities situated every 100 meters along an extensive elevation gradient,ranging from the tropical forest(80 meters above sea level)to the alpine treeline(4200 meters above sea level)in the Kangchenjunga landscape in eastern Nepal *** calculated communityweighted averages(reflecting dominant traits governing biomass,i.e.,mass-ratio effect)and functional divergence(reflecting increased trait variety,i.e.,complementarity effect)for leaf elements in a total of 1,859 trees representing 116 *** increasing mass-ratio effect and decreasing complementarity in leaf elements enhance forest biomass accumulation.A combination of elements together with elevation explains biomass(52.2%of the variance)better than individual elemental trait diversity(0.05%to 21%of the variance).elevation modulates trait diversity among plant species in biomass *** promotes biomass at lower elevations,but reduces biomass at higher elevations,demonstrating an interaction between elevation and *** interaction between elevation and mass-ratio effect produces heterogeneous effects on biomass along the elevation *** research indicates that biomass accumulation can be disproportionately affected by elevation due to interactions among trait diversities across vegetation *** higher trait variation enhances the adaptation of species to environmental changes,it reduces

关键词： ecosystem function elevational gradient Functional diversity Functional traits leaf elements Niche complementarity

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