Effects of exogenous nitrogen import on variations of nutrient in decomposing litters of Suaeda salsa in coastal marsh of the Yellow River estuary, China

Hu, Xingyun; Sun, Zhigao

doi:10.1007/s11356-021-12926-6

Cited by 7 publications

(2 citation statements)

References 72 publications

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“…However, Wei et al (2017) and Chen and Sun (2020) indicated that sediment deposition stimulated the decomposition of Flaveria bidentis, Setaria viridis and Suaeda glauca detritus to a certain extent. The primary reason inducing the dissimilar results could be ascribed to the differences in substrate quality of detritus during the experiment since previous studies have shown that substrate quality clearly influenced litter decomposition (Janousek et al 2017;Chen et al 2021;Hu and Sun 2021;Carrasco-Barea et al 2022). In this paper, the dry mass remaining in the three deposition treatments showed significantly correlations with C/N, N/P, C/S and P/S ratios (p<0.05 or p<0.01).…”

Section: Responses Of Litter Decomposition To Sediment Depositionmentioning

confidence: 52%

Potential Impacts of Sediment Deposition on Nutrient Variation in Typical Decaying Litters (Cyperus malaccensis) in Coastal Marsh of the Min River Estuary, Southeast China

Sun,

Wang,

Chen

et al. 2023

Wetlands

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Although sediment deposition is an important process in coastal marshes, insufficient information is available about its influence on litter decomposition and nutrient cycle. In order to investigate the potential impacts of sediment deposition on nutrient (C, N, P and S) variations in typical detritus (Cyperus malaccensi) in coastal marsh of the Min River estuary, three one-off deposition treatments (no sediment deposition (0 cm yr -1 , NSD), current sediment deposition (5 cm yr -1 , CSD) and strong sediment deposition (10 cm yr -1 , SSD)) were designed and the field decomposition experiment was conducted during 2016~2017. Results indicated that sediment deposition showed significant effect on litter decomposition rate, following the order of NSD (0.00735 d -1 )  CSD (0.00508 d -1 )  SSD (0.00378 d -1 ) (p<0.05). The contents of TC in decaying litters in the CSD and SSD treatments were significantly higher than those in the NSD treatment (p<0.05). The contents of TN and TS in detritus in the three treatments generally showed an increasing trend during 0~276 days, while those of TP showed increasing tendency after decomposing for 30 days. With increasing deposition depths, the contents of TC, TN, TP or TS in decaying litters generally increased. The differences in decomposition rates and nutrient contents among the three treatments primarily rested with the alterations of substrate quality in detritus. Stocks of C, N, P and S in decaying litters in the three deposition treatments evidenced the export from detritus to the surroundings and, with increasing deposition depths, the release of nutrient from detritus declined greatly. This paper found that strong sediment deposition reduced the nutrient return (particularly for S) from detritus, which, in turn, might alter the nutrient cycle in C. malaccensi marsh greatly.

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Section: Responses Of Litter Decomposition To Sediment Depositionmentioning

confidence: 52%

Potential Impacts of Sediment Deposition on Nutrient Variation in Typical Decaying Litters (Cyperus malaccensis) in Coastal Marsh of the Min River Estuary, Southeast China

Sun,

Wang,

Chen

et al. 2023

Wetlands

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“…Compared to P. communis , the nutrient cycling processes in the rhizosphere soil of S. salsa and A. sinensis are more susceptible to N addition (Zhang, Song, et al, 2019). Hu and Sun (2021) found that exogenous N addition led to a decrease in C:N of S. salsa and A. sinensis secretions, reducing the relative abundance of Firmicutes in the rhizosphere soils of S. salsa and A. sinensis . In contrast, N addition did not alter P. communis secretion (Nishimura & Tsuyuzaki, 2015).…”

Section: Discussionmentioning

confidence: 99%

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Zhang

Shao

et al. 2023

Land Degrad Dev

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The total amount and rate of atmospheric nitrogen (N) deposition are constantly increasing, which substantially influences the soil microbial community structure and function. However, it is still unclear whether the responses of different plant rhizosphere soil bacterial community to short‐term N addition was consistent. Based on 16s rRNA sequencing, we investigated the responses of rhizosphere and bulk soil bacterial community of halophytes (salt‐absorbing, salt‐rejecting, and salt‐secreting plant) to short‐term N addition in the Yellow River Delta. The bacterial community α‐diversity of Suaeda salsa (salt‐absorbing plant) was significantly higher in rhizosphere soil than in bulk soil, while no significant difference between Phragmites communis (salt‐rejecting plant) rhizosphere and bulk soil bacterial community α‐diversity was found. The differences were mainly ascribed to the higher N uptake capacity of P. communis, which resulted in no difference in N content between rhizosphere and bulk soil. The short‐term N addition significantly increased the α‐diversity of bacterial community in the rhizosphere soil of Aeluropus sinensis (salt‐secreting plant), but there was no effect on the α‐diversity of bacterial community in the rhizosphere soil of P. communis. Nitrogen addition enhances the salt uptake capacity of A. sinensis and alleviates the salt stress of bacterial growth. The relative abundance of Bacteroidetes for S. salsa and A. sinensis was significantly higher in rhizosphere soil than in bulk soil, and the relative abundance of Actinobacteria for P. communis and S. salsa was higher and lower in rhizosphere soil than in bulk soil, respectively. Salt‐absorbing of S. salsa leads to elevated rhizosphere soil salinity. Higher salinity and abundant carbon promote the Bacteroidetes and inhibit the Actinobacteria. Short‐term N addition caused an increase in the relative abundance of Gemmatimonadetes in halophyte rhizosphere soil and a decrease in the relative abundance of Firmicutes in S. salsa and A. sinensis bulk soil, which may be due to the different response of C:N of root secretions to N addition in halophytes. The relative abundance of rhizosphere soil denitrifying bacteria was higher in S. salsa and A. sinensis than in P. communis, while the reverse was observed for N‐fixing bacteria. The relative abundance of denitrifying bacteria decreased in P. communis and increased in S. salsa and A. sinensis. The low N soil environment of P. communis promotes the activity of N‐fixing bacteria, and the abundant N content of S. salsa and A. sinensis soil promotes the denitrification process. The research clarified that the response of soil bacterial community to short‐term N addition Treatment differed due to the influence of plant species and that N additions had smaller effects on the bacterial community than plant species.

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Stoichiometry of litter decomposition under the effects of climate change and nutrient enrichment: A meta-analysis

de la Casa,

Sardans,

Galindo

et al. 2024

Plant Soil

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Aims The cycling of nutrients from plant litter has key implications for the functioning of terrestrial ecosystems by controlling nutrient availability and net primary production. Despite extensive research on the effects of global change on ecosystem functioning, the direct implications of global change on stoichiometry and nutrient dynamics during litter decomposition remain poorly understood. To address this gap, we conducted a meta-analysis. Methods We analysed 178 experiments that simulated (i) warming, (ii) drought, (iii) increased water availability, (iv) N enrichment, (v) P enrichment, and (vi) combined N and P (N + P) enrichment. We compared earlier (approximately six months) and later (approximately one year) stages of decomposition and analysed the specific effects taking into account climate and plant type. Results The C:N and C:P ratios decreased in most warming and nutrient enrichment scenarios, leading to losses of litter C content, while the N:P ratio remained more resilient and affected by water availability. Furthermore, the abundance of resources (water and N + P) fosters the decomposition of litter. The nutrient mobilisation increases for both P and N under non-limited nutrient enrichment and it is faster for N than for P when water increases its availability. Nutrient enrichment was relevant in later stages of decomposition. Conclusions Our study provides insights into the fate of litter decomposition and its stoichiometric dynamics in response to drivers of global change. Concerning scenarios of C release and N and P immobilisation were identified. However, further experimentation and analysis are necessary to consider all interacting drivers.

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Effects of exogenous nitrogen import on variations of nutrient in decomposing litters of Suaeda salsa in coastal marsh of the Yellow River estuary, China

Cited by 7 publications

References 72 publications

Potential Impacts of Sediment Deposition on Nutrient Variation in Typical Decaying Litters (Cyperus malaccensis) in Coastal Marsh of the Min River Estuary, Southeast China

Potential Impacts of Sediment Deposition on Nutrient Variation in Typical Decaying Litters (Cyperus malaccensis) in Coastal Marsh of the Min River Estuary, Southeast China

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Stoichiometry of litter decomposition under the effects of climate change and nutrient enrichment: A meta-analysis

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