Data from: Drivers of available phosphorus distribution patterns in mangrove wetland soils and modeling of the influencing pathway of glomalin-related soil proteins

There are three files(.csv) in DATA dataset, which are phosphorus content data, environmental factors data and iron content data. They are used to reveal the distribution pattern of available phosphorus in mangrove soil and the key causal factors. The Code/Software dataset includes two files, a code text for random forest analysis; and a code text for structural equation modeling. The former was used to rank the environmental factors affecting available phosphorus content in order of importance; the latter was used to explore the influence pathways of glomalin-related soil protein on available phosphorus.Description of the data and file structureThe first row of each data file is the variable name, and the first column is the sample sites name. KO represents data obtained from K. obovata forest soil; AM represents data obtained from A. marina forest soil; and MF represents data obtained from mudflat soil. yEr represents the standard error of the data.phosphorus data.csv The file includes 9 sets of data. They are the content of soil total phosphorus (SOIL-TP), the content of phosphorus in GRSP (GRSP-P), the content of Olsen-P, the content of four biologically based P (CaCl2-P, HCl-P, Citrate-P, Enzyme-P), the contribution rate of GRSP to TP, and the contribution rate of AP (Olsen-P) to TP.environmental factor data.csv The file includes 11 sets of data. They are soil depth, the percentage of three particle sizes (clay, silt, sand), pH, the percentage of soil total carbon (TC), the percentage of soil total nitrogen (TN), the soil organic carbon content (SOC), the glomalin-related soil protein content (T-GRSP), the soil organic matter's carbon-to-nitrogen ratio (SOM-C/N), the glomalin-related soil protein's carbon-to-nitrogen ratio (GRSP-C/N).Fe data.csv This file consists of three data groups, which are the content of soil exchangeable iron (Exchangeable Fe), the content of soil total iron (Soil-Fe) and the content of iron in glomalin-related soil protein (GRSP-Fe).Code/SoftwarerandomForest.txt loaded packages: ggplot2, tidyverse, randomForest, rfUtilities, and rfPermutesoftware versions: R4.2.3pSEM.txtloaded packages: piecewiseSEM, readxlsoftware versions: R4.2.3</p

DataSheet_1_Precipitation-derived effects on the characteristics of proteinaceous soil organic matter across the continental United States.pdf

Proteinaceous amino acids composed up to 50% of microbial biomass, are a primary building block of soil organic nitrogen, and play a key role in soil organic N and C cycling. However, the large-scale drivers on these organic nitrogen pools is less explored. We hypothesized that the trends related to vegetation, soil mineralogy and climate will change the composition of hydrolyzable amino acids (HAAs), both within and between each horizon. Herein we report on the patterns of HAAs, and their dependence on soil (e.g., Al, Fe, pH) and climate (e.g., precipitation) factors between soil horizons across the continental U.S. It was found that the effect of vegetation type on HAAs was greater in the A horizon than in the C horizon, which was related to the different stages of the vegetation-associated decomposition and pedogenesis processes. A similar Leu-Phe-Ile-Gly co-occurrence structure was found in both soil horizons suggesting some similarity in processes that enrich organics in soil. Precipitation, but not temperature, showed significant associations with HAA composition. The chemical properties of the soil, including pH and mineral metals (Fe, Mn, Al, Ca), also influenced the HAAs’ characteristics. In particular, some specific HAAs (Glx, Asn, and Ala) mainly reflected the HAAs’ response to the environmental gradients in both horizons. The effect of precipitation on HAAs exhibits as a complex relationship mediated through organic matter, pH and minerals. To our knowledge, this is the first study to assess continental-wide descriptors of the largest soil organic N pool, showing that pH, Fe, Ca, precipitation and vegetation explain soil AA composition. The role played by each of these drivers in the accrual and turnover of organic matter over large regional scales deserve further scrutiny. The large surface and subsurface HAA data set from this study should help change the way micro-scale conceptual and mechanistic models describe the chemical interactions and source pools that drive soil organic nitrogen, and possibly soil organic matter composition over regional scales.</p

Biofouling Promotes Higher Concentration of Heavy Metal on Disposable Face Masks than Microplastic Films and Particles in Seawater: Mechanisms and Potential Ecological Risks

The insufficient control of waste associated with personal protective equipment (PPE) resulted in a large influx of disposable face masks (DFMs) in marine environments. Herein, we investigated the biofilm colonization on three types of polypropylene microplastics (MPs, i.e., DFMs, films, and particles) as well as the potential risks of MP-associated heavy metals (HMs) in seawater. Compared to conventional MP particles and films, DFMs were conducive to colonization by microorganisms and minerals, resulting in the formation of a typical spatial network biofilm structure. This triggered more HM adsorption by the biofilm-developed DFMs through surface complexation with the organic components in the biofilm. By BCR sequential extraction analysis, we found that organic and mineral components comprised 70.2–85.6% and 14.4–29.8% of the HM concentration in the biofilm-developed DFMs, respectively. In an in vitro gastrointestinal tract model, biofilm-developed DFMs had a much higher desorption capacity for HMs than MP particles and films. Moreover, the ecological risk index of biofilm-developed DFMs was significantly higher than that of biofilm-developed films and particles. Considering the potential ecological risk of biofilm-developed DFMs, we advocate that the reasonable recycling and environmentally friendly treatment of PPE MP pollutants should be considered as a bursting challenge for sustainable coastal development