Effects of warming and nitrogen addition on nutrient resorption efficiency in an alpine meadow on the northern Tibetan Plateau

Zong, Nan; Shi, Peili; Xi, Chai

doi:10.1080/00380768.2018.1467727

Cited by 18 publications

(15 citation statements)

References 52 publications

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“…The observed reductions in foliar N resorption are in line with studies reporting decreased N resorption efficiency with increasing mean annual temperatures in larger sets of species (Brant & Chen, ; Tang, Han, Chen, & Fang, ; Yuan & Chen, ; Zhang, Guo, Yu, Wang, & Wu, ). However, they are in contrast to previous findings that reported neutral or positive effects of simulated climate warming on nutrient resorption in plant species from temperate or cold climates (Aerts et al, ; Zong et al, ). This discrepancy may arise from the lower mean annual temperatures and lower temperature increases in these previous studies (a 0.93°C increase in Aerts et al, and a 2.2°C increase in Zong et al, ) compared with the 2–4°C increases in an already warmer climate simulated in this study.…”

Section: Discussioncontrasting

confidence: 99%

“…However, they are in contrast to previous findings that reported neutral or positive effects of simulated climate warming on nutrient resorption in plant species from temperate or cold climates (Aerts et al, ; Zong et al, ). This discrepancy may arise from the lower mean annual temperatures and lower temperature increases in these previous studies (a 0.93°C increase in Aerts et al, and a 2.2°C increase in Zong et al, ) compared with the 2–4°C increases in an already warmer climate simulated in this study.…”

Section: Discussioncontrasting

confidence: 99%

“…Patterns are less clear for other essential plant nutrients (e.g., Ca, Mg, S, Fe, Mn, or Zn), yet their dependence on environmental conditions could make them sensitive to temperature increases or rainfall reductions (de la Riva et al, ). Manipulative warming studies conducted in temperate and boreal ecosystems have shown relatively minor and species‐specific impacts of increased temperatures on nutrient resorption (Aerts et al, ; Norby et al, ; Suseela, Tharayil, Xing, & Dukes, ; Zong, Shi, & Chai, ). In warmer ecosystems (e.g., Mediterranean), warming and reduced rainfall can lead to strong changes in soil nutrient availability and large decreases in plant nutrient content and productivity (León‐Sánchez et al, , ; León‐Sánchez, Nicolás, Nortes, Maestre, & Querejeta, ; Sardans et al, , ; Sardans, Peñuelas, Prieto, & Estiarte, ).…”

Section: Introductionmentioning

confidence: 99%

“…Manipulative warming studies conducted in temperate and boreal ecosystems have shown relatively minor and species-specific impacts of increased temperatures on nutrient resorption (Aerts et al, 2007;Norby et al, 2000;Suseela, Tharayil, Xing, & Dukes, 2015;Zong, Shi, & Chai, 2018). In warmer ecosystems (e.g., Mediterranean), warming and reduced rainfall can lead to strong changes in soil nutrient availability and large decreases in plant nutrient content and productivity (León-Sánchez et al, 2018León-Sánchez, Nicolás, Nortes, Maestre, & Querejeta, 2016;Sardans et al, 2016Sardans et al, , 2017Sardans, Peñuelas, Prieto, & Estiarte, 2008 Gypsum soils are widespread occupying 100 million ha worldwide and harboring many endemic and endangered species (Escudero, Palacio, Maestre, & Luzuriaga, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Simulated climate change decreases nutrient resorption from senescing leaves

Prieto

Querejeta

2019

Global Change Biology

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Nutrient resorption is the process whereby plants recover nutrients from senescing leaves and reallocate them to storage structures or newer tissues. Elemental resorption of foliar N and P has been shown to respond to temperature and precipitation, but we know remarkably little about the influence of warming and drought on the resorption of these and other essential plant macro‐ and micronutrients, which could alter the ability of species to recycle their nutrients. We conducted a 5 year manipulative field study to simulate predicted climate change conditions and studied the effects of warming (W), rainfall reduction (RR), and their combination (W+RR) on nutrient resorption efficiency in five coexisting shrub species in a semiarid shrubland. Both mature and senesced leaves showed significant reductions in their nutrient contents and an altered stoichiometry in response to climate change conditions. Warming (W, W+RR) reduced mature leaf N, K, Ca, S, Fe, and Zn and senesced leaf N, Ca, Mg, S, Fe, and Zn contents relative to ambient temperature conditions. Warming increased mature leaf C/N ratios and decreased N/P and C/P ratios and increased senesced leaf C/N and C/P ratios. Furthermore, W and W+RR reduced nutrient resorption efficiencies for N (6.3%), K (19.8%), S (70.9%) and increased Ca and Fe accumulation in senesced leaves (440% and 35.7%, respectively) relative to the control treatment. Rainfall reduction decreased the resorption efficiencies of N (6.7%), S (51%), and Zn (46%). Reductions in nutrient resorption efficiencies with warming and/or rainfall reduction were rather uniform and consistent across species. The negative impacts of warming and rainfall reduction on foliar nutrient resorption efficiency will likely cause an impairment of plant nutrient budgets and fitness across coexisting native shrubs in this nutrient‐poor habitat, with probable implications for key ecosystem functions such as reductions in nutrient retention in vegetation, litter decomposition, and nutrient cycling rates.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulated climate change decreases nutrient resorption from senescing leaves

Prieto

Querejeta

2019

Global Change Biology

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“…Effects of warming on N cycling are usually driven by the balance of plant N demand and underground N supply (Chang et al., 2017; Noyce et al., 2019). On the one hand, warming is found to enhance plant N demand, such as the increases in plant N uptake (DeMarco et al., 2014; Turner & Henry, 2009), plant N resorption (Zong et al., 2018) and root capture for N (Leppälammi‐Kujansuu et al., 2013; Liu et al., 2017). On the other hand, warming can enhance underground N supply via accelerating N mineralization (Bai et al., 2013; Butler et al., 2012; Dawes et al., 2017; Gao & Yan, 2019), microbial N fixation (Sorensen & Michelsen, 2011) and increasing mycorrhizal contribution (Olsrud et al., 2010).…”

Section: Introductionmentioning

confidence: 99%

Warming leads to more closed nitrogen cycling in nitrogen‐rich tropical forests

Lie

Huang

Liu

et al. 2020

Global Change Biology

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Warming may have profound effects on nitrogen (N) cycling by changing plant N demand and underground N supply. However, large uncertainty exists regarding how warming affects the integrated N dynamic in tropical forests. We translocated model plant‐soil ecosystems from a high‐altitude site (600 m) to low‐altitude sites at 300 and 30 m to simulate warming by 1.0°C and 2.1°C, respectively, in tropical China. The effects of experimental warming on N components in plant, soil, leaching, and gas were studied over 6 years. Our results showed that foliar δ15N values and inorganic N (NH4‐N and NO3‐N) leaching were decreased under warming, with greater decreases under 2.1°C of warming than under 1.0°C of warming. The 2.1°C of warming enhanced plant growth, plant N uptake, N resorption, and fine root biomass, suggesting higher plant N demand. Soil total N concentrations, NO3‐N concentrations, microbial biomass N and arbuscular mycorrhizal fungal abundance were decreased under 2.1°C of warming, which probably restricted bioavailable N supply and arbuscular mycorrhizal contribution of N supply to plants. These changes in plants, soils and leaching indicated more closed N cycling under warming, the magnitude of which varied over time. The closed N cycling became pronounced during the first 3 years of warming where the sustained reductions in soil inorganic N could not meet plant N demand. Subsequently, the closed N cycling gradually mitigated, as observed by attenuated positive responses of plant growth and less negative responses of microbial biomass N to warming during the last 3 years. Overall, the more closed N cycling under warming could facilitate ecosystem N retention and affect production in these tropical forests, but these effects would be eventually mitigated with long‐term warming probably due to the restricted plant growth and microbial acclimation.

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Nutrient resorption responses of plant life forms to nitrogen addition in temperate shrublands

et al. 2022

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Atmospheric nitrogen (N) deposition has significantly altered nutrient availability in most terrestrial ecosystems, which may affect plant nutrient resorption and hence change nutrient cycling and community composition. Although studies on the effects of changed soil nutrients on leaf nutrient resorption have been extensively reported in forests and grasslands, much less known about how plants in temperate shrublands respond to nitrogen deposition across the world. A 4-year N addition experiment in Vitex negundo and Spiraea trilobata shrublands was conducted to investigate the potential impacts of N deposition on nutrient resorption in two life forms. The green and senesced leaf N ([N] g and [N] s ) and phosphorus ([P] g and [P] s ) concentrations were measured in four shrubs and two graminoids to calculate N (NRE) and P (PRE) resorption efficiency. We found markedly lower NRE and PRE in shrubs than in graminoids, implying that shrubs probably have a higher capability of acquiring nutrients from soil, whereas graminoids rely on acquiring more nutrients via resorption. N addition increased the [N] g , [N] s , and N:P ratios ([N:P]) and decreased the [P] g of shrubs and all species, whereas it only increased [N] s but had negligible effects on the [N] g , [P] g , and [N:P] of graminoids. The [P] s , NRE, and PRE did not change in either life form or all species combined after N fertilization. Our results suggest that shrubs increase N uptake but do not alter internal N cycling (i.e., nutrient resorption), whereas graminoids do not change N acquisition strategies, in response to increased N supply from the soil. Continuous N addition exacerbated the P limitation of the shrub plants. Both shrubs and graminoids were more likely to adopt nearly complete utilization of P from the soil and senesced leaves under P deficiency, leading to a noneffect of N addition on leaf PRE. Our findings also suggest that the [N] g and [P] g responses to N addition are life-form specific, implying that N addition may affect ecosystem carbon (C) and nutrient cycles by altering the dominance values of the two life forms and community composition.

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Effects of warming and nitrogen addition on nutrient resorption efficiency in an alpine meadow on the northern Tibetan Plateau

Cited by 18 publications

References 52 publications

Simulated climate change decreases nutrient resorption from senescing leaves

Simulated climate change decreases nutrient resorption from senescing leaves

Warming leads to more closed nitrogen cycling in nitrogen‐rich tropical forests

Nutrient resorption responses of plant life forms to nitrogen addition in temperate shrublands

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