Increase of belowground C allocation by plants under global warming or elevated CO2 may promote decomposition soil organic carbon (SOC) priming and strongly affects SOC dynamics. The specific effects depend on the amount frequency inputs. Most previous studies have investigated single additions, but they are not very representative for litterfall root exudation in many terrestrial ecosystems. We evaluated (13)C-labeled glucose added to three temporal patterns: single, repeated, continuous...

Abstract Decomposition of organic matter (OM) in soil, affecting carbon (C) cycling and climate feedbacks, depends on microbial activities driven by C nitrogen (N) availability. However, it remains unknown how decomposition various OMs vary across global supplies ratios N inputs. We examined OM incubating four types (leaf litter, wood, from mineral horizons) a decay continuum subtropical forest at Ailao Mountain, China with labile additions. wood high C:N decreased for 3.9 to 29% these...

Abstract Nitrogen (N) limitation is common in most terrestrial ecosystems, often leading to strong competition between microorganisms and plants. The mechanisms of niche differentiation reduce this remain unclear. Short-term 15 N experiments with NH 4 + , NO 3 − glycine were conducted July, August September a temperate grassland evaluate the chemical, spatial temporal by plants for N. Microorganisms preferred while . Both acquired more than July. soil depth had no significant effects on...

Around the world, increasing drought, which is exacerbated by climate change, has significant impacts on vegetation carbon assimilation. Identifying how short-term anomalies influence productivity in a timely and accurate manner at satellite scale crucial to monitoring drought. Satellite solar-induced chlorophyll fluorescence (SIF) recently been reported as direct proxy of actual photosynthesis more advantages than traditional indices (e.g., Normalized Difference Vegetation Index, NDVI...

Tamarix chinensis effectively prevents coastal erosion, stabilizes the surface of wetlands, and improves soil quality saline alkali land, playing a crucial role in wetland ecosystem restoration. exhibits wide distribution that is difficult to capture within single remote sensing image, while its frequent interspersion with other vegetation results significant intermixing. The characteristics mixed tamarix vary substantially across images from different scenarios, spectral confusion further...

Abstract BACKGROUND The fall armyworm (FAW), Spodoptera frugiperda is a notorious invasive pest that poses serious threat to global agricultural production and food security. In China, Cotesia ruficrus has emerged as promising indigenous biological control agent for controlling FAW populations. this study, we conducted series of comprehensive experiments explore the effects C. parasitization on development nutrient metabolism larvae. RESULTS Parasitization by significantly inhibited larvae,...

Precise regulation of the active site molecular catalysts is appealing because it could provide insights into catalytic mechanism and possibly a new strategy for catalyst design. A ruthenium complex, [Ru(dppMe, COMe)(bipy)(Cl)] (CSU-3), containing -Me -COMe substituted dipyridylpyrrole as pincer ligand, was designed synthesized. The CSU-3 complex featured Cl- ligand at axial position ammonia oxidation (AO), structurally analogous to AO [Ru(trpy)(dmabpy)(NH3)][PF6]2 (1) bearing terpyridine...

Remote sensing of high-latitude forests phenology is essential for understanding the global carbon cycle and response vegetation to climate change. The normalized difference index (NDVI) has long been used study boreal evergreen needleleaf (ENF) deciduous broadleaf forests. However, NDVI-based growing season generally reported be longer than that based on gross primary production (GPP), which can attributed between greenness photosynthesis. Instead introducing environmental factors such as...

We explored inorganic and organic N uptake patterns by dominant tree species in a subtropical plantation of southern China to improve understanding nitrogen (N) cycling these forests. labeled intact roots brief 15N exposures field hydroponic experiments. Nine were examined compare the effects functional plant group (conifers versus broadleaves), mycorrhizal types, forest successional stages on uptake. All investigated took up glycine at lower rates than other forms, with mean values 2.55 ±...

This paper propose a universal normalized vegetation index (UNVI), which is an improved (VI) based on the pattern decomposition method (UPDM), termed VIUPD. We also derive new matrices to facilitate convenient calculation of UNVI data from MODIS and Landsat-TM, ETM, OLI satellite sensors. compared performance difference (NDVI), enhanced (EVI) modified soil adjusted 2 (MSAVI2) estimate dynamics (chlorophyll content leaf area [LAI]). The results show that was more sensitive than NDVI, EVI...

Orchid mycorrhizas exhibit a unique type of mycorrhizal symbiosis that occurs between fungi and plants the family Orchidaceae. In general, roots orchids are typically coarse compared with those other plant species, leading to considerably low surface area volume ratio. As result, often ill-adapted for direct nutrient acquisition from soil so assocaitions important. However, role fungal partners in inorganic organic N by terrestrial has yet be clarified. Inorganic amino acid uptake...

Abstract Fog is an important water source for many ecosystems, especially in drylands. Most fog‐vegetation studies focus on individual plant scale; the relationship between fog and vegetation function at larger spatial scales remains unclear. This hinders accurate prediction of climate change impacts dryland ecosystems. To this end, we examined effect utilizing both optical microwave remote sensing‐derived proxies observations from two locations Gobabeb Marble Koppie within fog‐dominated...

Abstract Monitoring dryland vegetation trends and examining the drivers are of great importance to understand response future climate changes. Recent findings through satellite data indicate that greenness has increased in several regions worldwide. These greening patterns driven by human activities or combined environmental factors. However, analyses trend for without direct shrub expansion drylands still lacking. To this end, study investigates across Namib sand sea over March 2000...

Solar-induced chlorophyll fluorescence (SIF) is a direct indicator of vegetation photosynthesis. Time-series in-situ SIF data enable better understanding SIF-photosynthesis relationship. However, continuous seasonal extremely lack due to several technical problems for ground-based long-term observation systems. One the major it difficult measure radiance and irradiance simultaneously, both which are inputs traditional retrieval methods. Statistical approaches independent synchronous...