【摘 要】
：
Understanding patterns and determinants of net primary productivity(NPP)in global grasslands is ongoing challenges,espe-cially for belowground NPP(BNPP)and its fraction(fBNPP).By developing a comprehensive field-based dataset,we revealed that,along with g
【机 构】
：
Institute of Ecology,College of Urban and Environmental Sciences,and Key Laboratory for Earth Surfac
论文部分内容阅读
Understanding patterns and determinants of net primary productivity(NPP)in global grasslands is ongoing challenges,espe-cially for belowground NPP(BNPP)and its fraction(fBNPP).By developing a comprehensive field-based dataset,we revealed that,along with gradients of mean annual precipitation,actual evapotranspiration,and aridity,aboveground NPP(ANPP),BNPP,and total NPP(TNPP)exhibited hump-shaped patterns,whereas fBNPP showed an opposite trend.ANPP and TNPP showed positive correlations with mean annual temperature,but fBNPP was negatively correlated with it.The relationship between BNPP and climatic factors was considerably weak,indicating that BNPP was relatively stable regardless of the climate conditions.We also observed that the sensitivities of ANPP and BNPP to interannual temperature variability and those of BNPP to interannual precipitation fluctuations exhibited large variations among different study sites,and differed from those at the spatial scale.In contrast,the temporal sensitivities of ANPP to interannual precipitation variability were highly similar across all the individual sites and much smaller than those at the spatial scale.Overall,these results highlight that precipitation,temperature and evapotranspiration all play vital roles in shaping ANPP pattern and its partitioning to belowground and that the patterns of BNPP along climatic gradients do not mirror those of the ANPP.
其他文献
As a class of powerful molecular tool,antisense oligonucleotides(ASOs)are not only broadly used in protein and RNA biology,but also a highly selective therapeutic strategy for many diseases.Although the concept that ASO reagents only reduce expression of
Since the early 1990s,it has been known that new genes originate anytime in evolution in any organisms since the remote past billion years ago(BYA)(Long and Langley,1993;Long et al.,2013).It is also widely accepted that gene duplication is a main process
African swine fever virus(ASFV)has been circulating in China for more than two years,and it is not clear whether the biological properties of the virus have changed.Here,we report on our surveillance of ASFVs in seven provinces of China,from June to Decem
99Tc is a long-lived radionuclide present in large amounts as TcO4-anion in used nuclear fuel.Its removal from the waste stream is highly desirable because of its interference capability with actinide separation and its volatile nature during the nuclear
The moment we open our eyes,we experience a rich and detailed visual world,but the amount of information available to report is rather limited.This dissociation relates to a major debate regarding the nature of visual consciousness.The overflow argument s
Organ shortage is a major bottleneck in allotransplantation and causes many wait-listed patients to die or become too sick for transplantation.Genetically engineered pigs have been discussed as a potential alternative to allogeneic donor organs.Although x
Maj or depressive disorder (MDD) is a prevalent psychiatric disease that involves malfunctions of different cell types in the brain.Accumulating studies started to reveal that microglia,the primary resident immune cells,play an important role in the devel
Circularly polarized luminescence (CPL) materials have potential applications in three-dimensional (3D) displays,quantum encryption,and optical sensors.The development of single-component CPL materials with polymorphic assembly and hand-edness inversion r
Inflammation is a self-protection mechanism that can be triggered when innate immune cells detect infection.Eradication of pathogen infection requires appropriate immune and inflammatory responses,but excessive inflammatory responses can cause uncontrolle
Dear Editor,rnClustered regularly interspaced short palindromic repeats associated protein (CRISPR/Cas) systems are convenient and versatile tools for genome editing.Directed by a guide RNA (gRNA),the Cas nuclease produces double-strand break (DSB) at the