Decoupled responses of above‐ and below‐ground stability of productivity to nitrogen addition at the local and larger spatial scale

Yang, Guo-Jiao; Hautier, Yann; Zhang, Zijia; Luo, Wentao; Han, Xingguo

doi:10.1111/gcb.16090

Cited by 46 publications

(42 citation statements)

References 71 publications

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“…This is disaccord with the responses of ANPP stability to N addition, which showed that low‐level N addition had minor effect on ANPP stability, while high‐level N addition significantly reduced ANPP stability (Figure S2, Table S1). The result that low‐level N addition significantly promoted BNPP stability is consistent with Verma and Sagar (2021), but in contrast to Yang et al (2022) that reported no effect. The conflicted results highlight the complexity of BNPP stability in response to N addition in natural grasslands, which deserves further investigations.…”

Section: Discussionsupporting

confidence: 88%

“…For example, soil‐Al toxicity and the depletion of soil base cations (K + , Ca 2+ , Mg 2+ ) have caused species losses and reduced productivity (Bai et al, 2015; Verma & Sagar, 2021). Moreover, Yang et al (2022) have further detected decoupling responses of the stability of above‐ and below‐ground productivity to N enrichment at the local scale, that is, N addition decreased the stability of ANPP, but did not affect the stability of BNPP, and these decoupling responses propagate to the larger spatial scale (Yang et al, 2022). Therefore, the response pattern of BNPP stability to N addition and underlying mechanisms may not be simply extrapolated from that of ANPP stability.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the response pattern of BNPP stability to N addition and underlying mechanisms may not be simply extrapolated from that of ANPP stability. Furthermore, although the stability of BNPP in the topsoil has been studied sporadically (Verma & Sagar, 2021; Yang et al, 2022), the research on the response of BNPP stability to N addition is still extremely scarce in the subsoil. Given that the significant differences between BNPP in topsoil and subsoil of alpine meadow (Song et al, 2017; Zhang, Quan, et al, 2017), root growth is closely bound up with nutrient availability (Wei et al, 2019; Zewdie et al, 2008) and that the N availability is highly heterogeneous along the soil profile.…”

Section: Introductionmentioning

confidence: 99%

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Below‐ground net primary productivity stability in response to a nitrogen addition gradient in an alpine meadow

Chen

Wang

et al. 2022

Functional Ecology

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Temporal stability of ecosystem productivity is important for providing reliable ecosystem services under global changes. Great efforts have been made to explore the response of above‐ground net primary productivity (ANPP) stability to nitrogen (N) enrichment, yet how it affects below‐ground net primary productivity (BNPP) stability remains elusive, which hinders a comprehensive understanding of ecosystem stability from the view of a whole system. Here, using a field manipulative experiment with six N addition rates (0, 2, 4, 8, 16, 32 g N m−2 year−1), we explored the response patterns and drivers of BNPP stability in the topsoil (0–20 cm) and subsoil (20–40 cm) in the alpine meadow. The results showed that BNPP stability at both soil depths showed a unimodal response to increasing N addition rates. Specifically, for both the topsoil and subsoil, low‐level N addition significantly promoted BNPP stability, while high doses of N addition had no significant impact on BNPP stability, suggesting that current low level of N deposition likely benefits the stable provision of below‐ground functioning. Furthermore, dominant species stability and species richness contributed most to the changes in BNPP stability in the topsoil, whereas only dominant species stability was the dominant driver of BNPP stability in the subsoil. This study is among the first to illuminate the main mechanisms underlying the responses of BNPP stability to N enrichment at various soil depths, which will advance our current understanding of N addition effects on below‐ground processes and benefit the sustainable provision of ecosystem functioning in the context of atmospheric N deposition. Read the free Plain Language Summary for this article on the Journal blog.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Below‐ground net primary productivity stability in response to a nitrogen addition gradient in an alpine meadow

Chen

Wang

et al. 2022

Functional Ecology

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“…For example, Wang et al (2019) found that in temperate grasslands, at lower N addition levels, ANPP increase with N additions, while below-ground net primary productivity (BNPP) decreases. Nitrogen enrichment could reduce the stability of ANPP on local and larger spatial scales but does not affect the stability of BNPP or NPP at the scale studied ( Yang et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of nitrogen deposition research within grassland ecosystems globally and its insight from grassland microbial community changes in China

Cui

Liu

et al. 2022

Front. Plant Sci.

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As global change continues to intensify, the mode and rate of nitrogen input from the atmosphere to grassland ecosystems had changed dramatically. Firstly, we conducted a systematic analysis of the literature on the topic of nitrogen deposition impacts over the past 30 years using a bibliometric analysis. A systematic review of the global research status, publication patterns, research hotspots and important literature. We found a large number of publications in the Chinese region, and mainly focuses on the field of microorganisms. Secondly, we used a meta-analysis to focus on microbial changes using the Chinese grassland ecosystem as an example. The results show that the research on nitrogen deposition in grassland ecosystems shows an exponential development trend, and the authors and research institutions of the publications are mainly concentrated in China, North America, and Western Europe. The keyword clustering results showed 11 important themes labeled climate change, elevated CO2, species richness and diversity, etc. in these studies. The burst keyword analysis indicated that temperature sensitivity, microbial communities, etc. are the key research directions. The results of the meta-analysis found that nitrogen addition decreased soil microbial diversity, and different ecosystems may respond differently. Treatment time, nitrogen addition rate, external environmental conditions, and pH had major effects on microbial alpha diversity and biomass. The loss of microbial diversity and the reduction of biomass with nitrogen fertilizer addition will alter ecosystem functioning, with dramatic impacts on global climate change. The results of the study will help researchers to further understand the subject and have a deep understanding of research hotspots, which are of great value to future scientific research.

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“…Depending on the amount of nitrogen added, nitrogen addition has both beneficial and negative impacts on plant growth and community productivity. High and abrupt nitrogen addition was toxic for plant growth ( Gao et al., 2014 ) whereas, intermediate nitrogen addition increased leaf nutrients, total leaf biomass ( Liang et al., 2020 ), and carbon in plant shoots ( Sun et al., 2020 ; Wang et al., 2020 ), seedling performance ( Shi et al., 2020 ), and the stability of aboveground net primary productivity plant community ( Chen et al., 2016b ; Yang et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen addition alters plant growth in China’s Yellow River Delta coastal wetland through direct and indirect effects

et al. 2022

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In the coastal wetland, nitrogen is a limiting element for plant growth and reproduction. However, nitrogen inputs increase annually due to the rise in nitrogen emissions from human activity in coastal wetlands. Nitrogen additions may alter the coastal wetlands’ soil properties, bacterial compositions, and plant growth. The majority of nitrogen addition studies, however, are conducted in grasslands and forests, and the relationship between soil properties, bacterial compositions, and plant growth driven by nitrogen addition is poorly understood in coastal marshes. We conducted an experiment involving nitrogen addition in the Phragmites australis population of the tidal marsh of the Yellow River Delta. Since 2017, four nitrogen addition levels (N0:0 g • m-2 • year-1, N1:5 g • m-2 • year-1, N2:20 g • m-2 • year-1, N3:50 g • m-2 • year-1) have been established in the experiment. From 2017 to 2020, we examined soil properties and plant traits. In 2018, we also measured soil bacterial composition. We analyzed the effect of nitrogen addition on soil properties, plant growth, reproduction, and plant nutrients using linear mixed-effect models. Moreover, structural equation modeling (SEM) was utilized to determine the direct and indirect effects of nitrogen addition, soil properties, and bacterial diversity on plant growth. The results demonstrated that nitrogen addition significantly affected plant traits of P. australis. N1 and N2 levels generally resulted in higher plant height, diameter, leaf length, leaf breadth, and leaf TC than N0 and N3 levels. Nitrogen addition had significantly impacted soil properties, including pH, salinity, soil TC, and soil TS. The SEM revealed that nitrogen addition had a direct and positive influence on plant height. By modifying soil bacterial diversity, nitrogen addition also had an small indirect and positive impact on plant height. However, nitrogen addition had a great negative indirect impact on plant height through altering soil properties. Thus, nitrogen inputs may directly enhance the growth of P. australis at N1 and N2 levels. Nonetheless, the maximum nitrogen addition (N3) may impede P. australis growth by reducing soil pH. Therefore, to conserve the coastal tidal marsh, it is recommended that an excess of nitrogen input be regulated.

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Decoupled responses of above‐ and below‐ground stability of productivity to nitrogen addition at the local and larger spatial scale

Cited by 46 publications

References 71 publications

Below‐ground net primary productivity stability in response to a nitrogen addition gradient in an alpine meadow

Below‐ground net primary productivity stability in response to a nitrogen addition gradient in an alpine meadow

Characteristics of nitrogen deposition research within grassland ecosystems globally and its insight from grassland microbial community changes in China

Nitrogen addition alters plant growth in China’s Yellow River Delta coastal wetland through direct and indirect effects

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