Responses of soil nitrogen fixation to Spartina alterniflora invasion and nitrogen addition in a Chinese salt marsh

Huang, Jingxin; Xu, Xiao; Wang, Min; Nie, Ming; Qiu, Shiyun; Wang, Qing; Quan, Zhe‐Xue; Xiao, Ming; Li, Bo

doi:10.1038/srep20384

Cited by 55 publications

(45 citation statements)

References 48 publications

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“…Even at a similar elevation, Huang et al. () have found that the increase in the productivity of S. alterniflora is five times that of P. australis , in response to the same input of N enrichment at a S. alterniflora – P. australis ecotone in the tidal marsh of the Yangtze Estuary, China. This phenomenon might have occurred because S. alterniflora assimilates nutrients more efficiently than P. australis (Peng et al.…”

Section: Discussionmentioning

confidence: 99%

“…, Huang et al. ), and nearly one‐half of the marshes in China have been invaded by this species (Liu ). Collectively, the broad geographic ranges, differing nutrient inflows, and wide distribution patterns of these two species along the coast of China provide an ideal system for understanding how complex environments drive geographic pattern of plant productivity.…”

Section: Introductionmentioning

confidence: 99%

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Human eutrophication drives biogeographic salt marsh productivity patterns in China

Líu

Liu

et al. 2019

Ecological Applications

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Salt marshes are important natural carbon sinks with a large capacity to absorb exogenous nutrient inputs. The effects of nutrients on biogeographic productivity patterns, however, have been poorly explored in salt marshes. We conducted field surveys to examine how complex environments affect productivity of two common salt marsh plants, invasive Spartina alterniflora and native Phragmites australis, along an 18,000‐km latitudinal gradient on the Chinese coastline. We harvested peak aboveground biomass as a proxy for productivity, and measured leaf functional traits (e.g., leaf area, specific leaf area [SLA], leaf nitrogen [N] and phosphorus [P]), soil nutrients (dissolved inorganic N [DIN] and available P [AP]), and salinity. We compiled data on mean annual temperature (MAT) and exogenous nutrients (both N and P). Then, we examined how these abiotic factors affect salt marsh productivity using both linear mixed effect models and structural equation modeling. Using a trait‐based approach, we also examined how salt marsh productivity responds to changing environments across latitude. Exogenous nutrients (both N and P), compared with temperature and other variables (e.g., DIN, AP, salinity), were the dominant factors in explaining the biogeographic productivity patterns of both S. alterniflora and P. australis. Leaf size‐related traits (e.g., leaf area), rather than leaf economic traits (e.g., SLA, leaf N and P), can be used to indicate the positive effects of exogenous nutrients on the productivity of these two species. Our results demonstrated that human eutrophication surpassed temperature as the major driver of biogeographic salt marsh productivity pattern, challenging current models in which biogeographic productivity pattern is primarily controlled by temperature. Our findings have potential broad implications for the management of S. alterniflora, which is a global invader, as it has benefited from coastal eutrophication. Furthermore, exogenous nutrient availability and leaf size need to be integrated into earth system models that are used to predict global plant productivity in salt marshes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Human eutrophication drives biogeographic salt marsh productivity patterns in China

Líu

Liu

et al. 2019

Ecological Applications

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“…However, only the top 10 cm of soil, the organic carbon content of the mudflat was significantly increased due to invasive Spartina in mangrove ecosystems in Zhangjiang Estuary [10]. The effect of invasive species on native ecosystems can be influenced by vegetation biomass, litter production, and quality and microbiological activities [12,13,18,19]. Therefore, it is useful to conduct more field studies on the invasive effects of S. alterniflora on soil organic carbon dynamics in different coastal wetland ecosystems [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Invasive Spartina alterniflora Loisel. and Subsequent Ecological Replacement by Sonneratia apetala Buch.-Ham. on Soil Organic Carbon Fractions and Stock

Feng

Wang

Shujuan

et al. 2019

Forests

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Background and Objectives: The rapid spread of invasive Spartina alterniflora Loisel. in the mangrove ecosystems of China was reduced using Sonneratia apetala Buch.-Ham. as an ecological replacement. Here, we studied the effects of invasion and ecological replacement using S. apetala on soil organic carbon fractions and stock on Qi’ao Island. Materials and Methods: Seven sites, including unvegetated mudflat and S. alterniflora, rehabilitated mangroves with different ages (one, six, and 10 years) and mature native Kandelia obovata Sheue, Liu, and Yong areas were selected in this study. Samples in the top 50 cm of soil were collected and then different fractions of organic carbon, including the total organic carbon (TOC), particulate organic carbon (POC), soil water dissolved carbon (DOC) and microbial biomass carbon (MBC), and the total carbon stock were measured and calculated. Results: The growth of S. alterniflora and mangroves significantly increased the soil TOC, POC, and MBC levels when compared to the mudflat. S. alterniflora had the highest soil DOC contents at 0–10 cm and 20–30 cm and the one-year restored mangroves had the highest MBC content. S. alterniflora and mangroves both had higher soil total carbon pools than the mudflat. Conclusions: The invasive S. alterniflora and young S. apetala forests had significantly lower soil TOC and POC contents and total organic carbon than the mature K. obovata on Qi’ao Island. These results indicate that ecological replacement methods can enhance long term carbon storage in Spartina-invaded ecosystems and native mangrove species are recommended.

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“…It has been introduced to China since 1979 for coastal erosion control and sediment stabilization2930. S. alterniflora invasion in the coastal zone of China has expanded over the past 30 years, from Tianjin in the north to Beihai in the south, by occupying bare flat and/or by replacing native C 3 plants (e.g., Suaeda salsa and Phragmites australis ), and become one of the dominant plants in China’s coastal wetland1620.…”

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confidence: 99%

Spartina alterniflora invasion alters soil microbial community composition and microbial respiration following invasion chronosequence in a coastal wetland of China

Yang

Jeelani

Leng

et al. 2016

Sci Rep

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The role of exotic plants in regulating soil microbial community structure and activity following invasion chronosequence remains unclear. We investigated soil microbial community structure and microbial respiration following Spartina alterniflora invasion in a chronosequence of 6-, 10-, 17-, and 20-year-old by comparing with bare flat in a coastal wetland of China. S. alterniflora invasion significantly increased soil moisture and salinity, the concentrations of soil water-soluble organic carbon and microbial biomass carbon (MBC), the quantities of total and various types of phospholipid fatty acids (PLFAs), the fungal:bacterial PLFAs ratio and cumulative microbial respiration compared with bare flat. The highest MBC, gram-negative bacterial and saturated straight-chain PLFAs were found in 10-year-old S. alterniflora soil, while the greatest total PLFAs, bacterial and gram-positive bacterial PLFAs were found in 10- and 17-year-old S. alterniflora soils. The monounsaturated:branched PLFAs ratio declined, and cumulative microbial respiration on a per-unit-PLFAs increased following S. alterniflora invasion in the chronosequence. Our results suggest that S. alterniflora invasion significantly increased the biomass of soil various microbial groups and microbial respiration compared to bare flat soil by increasing soil available substrate, and modifying soil physiochemical properties. Soil microbial community reached the most enriched condition in the 10-year-old S. alterniflora community.

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Responses of soil nitrogen fixation to Spartina alterniflora invasion and nitrogen addition in a Chinese salt marsh

Cited by 55 publications

References 48 publications

Human eutrophication drives biogeographic salt marsh productivity patterns in China

Human eutrophication drives biogeographic salt marsh productivity patterns in China

Effects of Invasive Spartina alterniflora Loisel. and Subsequent Ecological Replacement by Sonneratia apetala Buch.-Ham. on Soil Organic Carbon Fractions and Stock

Spartina alterniflora invasion alters soil microbial community composition and microbial respiration following invasion chronosequence in a coastal wetland of China

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