Multiple competitive superiority made a great successful invasion of Spartina alterniflora in Eastern China: hints for management.

Numerous case studies indicate that the successful invasion of alien species involve multiple mechanisms. Spartina alterniflora (Poaceae) has rapidly and extensively encroached on China's coastline over the past decades, however, limited studies have explored multiple invasion mechanisms. Using a combination of greenhouse experiments, field survey, and literature investigations, a cross-scale study of S.

Impacts of land-use change on carbon dynamics in China's coastal wetlands.

The impact of land-use and land-cover change (LULCC) on ecosystem carbon (C) dynamics has been previously documented at local and global scales, but uncertainty persists for coastal wetlands due to geographical variability and field data limitations. Field-based assessments of plant and soil C contents and stocks of various LULCC types were conducted in nine regions along the coastline of China (21°-40°N). These regions cover natural coastal wetlands (NWs, including salt marshes and mangroves) and former wetlands converted to different LULCC types, including reclaimed wetlands (RWs), dry farmlands (DFs), paddy fields (PFs) and aquaculture ponds (APs).

Association of acute kidney injury and clinical outcomes in patients with COVID-19 in Shenzhen, China: a retrospective cohort study.

Background: Acute kidney injury (AKI) was found in some patients with COVID-19 pneumonia and accompanied with poor outcomes. The objective of this study was to investigate the association of AKI with clinical outcomes in COVID-19 patients.

Methods: In this cohort study, we reviewed electronic medical data from patients with COVID-19 in Shenzhen from January 11 to February 19, 2020.

Sea-level rise will reduce net CO uptake in subtropical coastal marshes.

Coastal marshes have a significant capacity to sequester carbon; however, sea-level rise (SLR) is expected to result in prolonged flooding and saltwater intrusion in coastal regions. To explore the effects of SLR projections on net CO uptake in coastal marshes, we conducted a "double-check" investigation, including the eddy covariance (EC) measurements of the CO fluxes in subtropical coastal marshes along inundation and salinity gradients, in combination with a mesocosm experiment for analyzing CO flux components under waterlogging and increased salinity conditions. During the same measurement periods, the net ecosystem CO exchange (NEE based on the EC dataset) in an oligohaline marsh was higher than that in a low-elevation mesohaline marsh, whereas the NEE was lower than that in a high-elevation freshwater marsh.

The importance of the propagule-sediment-tide "power balance" for revegetation at the coastal frontier.

Revegetation of pioneer plants is a critical phase in community establishment for mudflats in seriously degraded coastal wetlands. We tested a hypothesis of the importance of a "power balance" among propagule resilience and sedimentary and tidal disturbances for vegetation reestablishment. Our experiment used three types of propagules (seeds, seedlings, and corms) of native Scirpus species in the fringing flats with similar tidal flows and varying sedimentary intensities in the Yangtze Estuary.

[Diffusive CO Flux Across the Water-air Interface of Reclaimed Shrimp Ponds in the Minjiang River Estuary Based on the TBL Model].

Freshwater aquatic ecosystems are important sources of greenhouse gases, such as CO. However, few studies have presented data on the greenhouse gas flux from coastal aquaculture ponds. Diffusion models are important tools for estimating the CO exchange flux across the water-air interface of aquatic ecosystems.

[Nutrient Distribution of Overlying Water in Tidal Marshes in Five Estuaries and Bays of the Fuzhou Region in Autumn].

Overlying water from the tidal marshes in five estuaries and bays, namely, Xinghua Bay (Fuzhou Part), Fuqing Bay, Luoyuan Bay, Minjiang River Estuary, and Aojiang River Estuary of the Fuzhou region were collected in autumn of 2015, and the nitrogen and phosphorus nutrient concentration and other physical and chemical indicators of the overlying water were measured to discuss the reasons for the differences in the nutrient concentration of the overlying water in tidal marsh wetlands in different bays and estuaries. There were significant differences in the nitrogen and phosphorus nutrient concentrations of the overlying waters of the tidal marshes in the different bays and estuaries (<0.05).

[Diurnal Variations of CH and NO Fluxes from the Drained Aquaculture Pond in the Minjiang River Estuary During Early Winter].

Annual drainage is a typical management activity practiced by operators as a way to export aquaculture effluent, accelerate aerobic decomposition of bottom soils, and avoid eutrophication during the non-culture period after harvest. Drainage activities can cause large changes in hydrology, nutrient cycling, sediment physicochemical properties, and even broad ecosystem functions. In order to understand the effects of drainage on the diurnal variation characteristics and magnitude of greenhouse gas (CH and NO) fluxes from the aquaculture ponds of the estuaries, a 24-hour continuous monitoring was conducted from one undrained pond (UDP) and one drained pond (DP) during early winter in the Minjiang River estuary on the southeast coast of China.

[Short-term Effects of Nitrogen Deposition on CO and CH Fluxes from Wetlands in the Minjiang River Estuary].

In order to evaluate the effects of nitrogen deposition on CO and CH fluxes from a marsh in the Min River estuary at Daoqingzhou, Fujian, static chamber-gas chromatography (GC) techniques were used. CO and CH fluxes at a control (CK)[0 g·(m·a)], N1[24 g·(m·a)], N2[48 g·(m·a)], and N3[96 g·(m·a)] were measured and analyzed and the related environmental factors were recorded. The results show that,① compared to the control treatment, the effects of nitrogen deposition on the CO fluxes for N1 and N3 increased by 20.

[Diurnal Variations of Concentration of Porewater Dissolved CH and CO in a Brackish Marsh Dominated by and During Neap and Spring Tidal Days in the Minjiang River Estuary].

Understanding of diurnal variation of soil porewater dissolved CO and CH concentration plays an important role in revealing carbon cycling in estuarine wetlands.During neap and spring tidal days in April and September 2010,the diurnal variations of soil porewater dissolved CO and CH concentrations and main impacting factors in a brackish marsh ecosystem dominated by two species of (brevifolius) and (common reed) were determined in the ShanYutan in the Min River estuary,southeast China.The results showed that:① the soil porewater dissolved CH concentration during the spring and neap tidal days in April and September ranged from 88.