Biochar amendment improves Morchella sextelata yield by enhancing soil NO-N availability and increasing the diversity while decreasing the absolute abundance of fungal community.

Black morel (Morchella sextelata) is widely regarded as a post-fire mushroom because of its prolific fruiting in post-fire forest soils enriched with charcoal. Intriguingly, artificial cultivation of M. sextelata often incorporates biochar as a soil amendment to enhance yield, although the underlying physicochemical and ecological mechanisms remain unclear.

Dual Control of the Ocean Current and Terrestrial Inputs on GDGT-Based Sea Surface Temperature Reconstructions in the High-Deposition Marginal Sea.

Understanding past climate variations is essential for predicting future climate scenarios. Glycerol dialkyl glycerol tetraethers (GDGTs) are valuable proxies for reconstructing past climates, yet their applicability in dynamic, high-deposition environments, such as continental marginal seas, remains uncertain. In this study, we analyzed GDGT distributions in 20 surface sediment samples collected along a longitudinal transect (121° 58' 48″ E) spanning different latitudes in the Southern Yellow Sea (SYS), China.

Microbial Community Response and Assembly Process of Yellow Sand Matrix in a Desert Marginal Zone Under Cultivation.

In this study, we investigated the adaptation of yellow-sand-substrate cultivation in the desert fringe and its effect on soil physicochemical properties and microbial communities. The qPCR and high-throughput sequencing with null modeling analyzed microbial diversity, networks, and assembly of cultivation under nutrient supplementation, linking physicochemical changes to microbial dynamics. The results showed that the yellow sand substrate can be planted with Morchella in the desert fringe area, as the cultivation with nutrient bags resulted in a yield of 691 g/m of fruit units.

The Process of Soil Carbon Sequestration in Different Ecological Zones of Qingtu Lake in the Arid-Semi-Arid Region of Western China.

As a vital component of the global carbon pool, soils in arid and semi-arid regions play a significant role in carbon sequestration. In the context of global warming, increasing temperatures and moisture levels promote the transformation of barren land into wetlands, enhancing carbon sinks. However, the overdevelopment of oases and excessive extraction of groundwater lead to the opposite effect, reducing carbon sequestration.

A nationwide study of heavy metal(loid)s in agricultural soils and the soil-grown black morel Morchella sextelata in China.

The accumulation of heavy metal(loid)s (HMs) in soil-grown mushrooms poses potential health risks. Morchella sextelata (black morel) is a typical soil-grown mushroom with a rapidly expanding cultivation area. This study investigated the distribution of arsenic, cadmium, chromium, copper, mercury, nickel, lead, and zinc in 213 pairs of soil and morel samples collected from 29 provincial administrative regions in China, together with the nutritional contents in the morel samples.

Ecological Risk Assessment and Source Identification of Heavy Metals in Soils from Shiyang River Watershed in Northwest China.

Shiyang River Watershed is an important ecological barrier and agricultural production area in Northwest China, and the study of soil heavy metal content, distribution, and sources is important for agricultural product safety, pollution control, and ecosystem health. In this paper, 140 soil samples were collected from 28 stations to assess the level of heavy metal (Arsenic (As), Copper (Cu), Lead (Pb), Cadmium (Cd), Chromium (Cr), Mercury (Hg), Nickel (Ni), Zinc (Zn)) contamination, pollutant sources and influencing factors of soil in Shiyang River Watershed through determination of the metal contents and statistical analysis. The results indicated that the soils in the study area are typical saline soils in arid zones.

Soil texture and microorganisms dominantly determine the subsoil carbonate content in the permafrost-affected area of the Tibetan Plateau.

Under climate warming conditions, storage and conversion of soil inorganic carbon () play an important role in regulating soil carbon (C) dynamics and atmospheric CO content in arid and semi-arid areas. Carbonate formation in alkaline soil can fix a large amount of C in the form of inorganic C, resulting in soil C sink and potentially slowing global warming trends. Therefore, understanding the driving factors affecting carbonate mineral formation can help better predict future climate change.

Are oil spills an important source of heavy metal contamination in the Bohai Sea, China?

Accurate evaluation of the heavy metal contamination caused by oil spills is more urgent than that of organic pollution since heavy metals are toxic and persistent. This study applies bulk geochemical parameters and hydrocarbon compositions to explore heavy metal contamination caused by oil spills. The contents of six heavy metals (Cu, Pb, Zn, Cr, Ni, and Co), total organic carbon, aliphatic hydrocarbons, and grain size were measured in 50 subsurface sediment samples obtained from an area affected by oil spills in the Bohai Sea.

Distribution and controls of heavy metals and organic matter in the surface sediments of the Southern Yellow Sea, China.

Accurate and effective determination of the source of heavy metals is essential for the treatment of marine ecological environments. This article attempts to combine geochemical composition data and hydrocarbon composition data to achieve this purpose. The concentrations of six heavy metals (Cu, Pb, Zn, Cr, Ni, and Co), grain size, total organic carbon (TOC) content, AlO content, and aliphatic hydrocarbons (AHs) in 501 surface samples from the Southern Yellow Sea (SYS) were analyzed.

An analysis of organic matter sources for surface sediments in the central South Yellow Sea, China: evidence based on macroelements and n-alkanes.

By analyzing the composition of n-alkane and macroelements in the surface sediments of the central South Yellow Sea of China, we evaluated the influencing factors on the distribution of organic matter. The analysis indicates that the distribution of total organic carbon (TOC) was low in the west and high in the east, and TOC was more related to Al2O3 content than medium diameter (MD). The composition of n-alkanes indicated the organic matter was mainly derived from terrestrial higher plants.