In order to determine the effects of nutrient inputs on changes of phosphorus forms and phytoplankton growth in large shallow lakes, an enrichment bioassay was conducted using surface lake water collected from the Meiliang Bay of Taihu Lake in spring. The concentration of different phosphorus forms, phytoplankton biomass (chlorophyll a) and alkaline phosphatase activity (APA) was analyzed after the addition of different concentrations of inorganic nutrients. The results showed that the phytoplankton biomass increased significantly with the addition of phosphorus (P), but with no primary effect from nitrogen (N), which suggested the phytoplankton growth was mainly limited by P. The maximum growth rate and the highest concentration of chlorophyll both occurred in the SRP 0.015 mg x L(-1) treatment. Nitrate addition could improve the bioavailability of phosphorus, accelerate the phosphorus cycling process and promote the growth of APA. There was an induction-repression mechanism resulting in a negative relationship between APA and orthophosphate concentration. The APA was obviously stimulated under PO4(3-) -P ≤ 0.025 mg x L(-1). This paper researches the transformation and cycling process of phosphorus in water and the induction-repression mechanism between the APA and orthophosphate concentration. The result can help to reveal the compensation path of nutrients in algae growth process and provide a theoretical basis for the further reveal of the mechanism of algae outbreaks.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Chapter 4: DIFFERENTIAL DIAGNOSIS of PRIMARY HYPERPARATHYROIDISM.
Ann Endocrinol (Paris)
January 2025
Service d'Endocrinologie, Diabétologie, Métabolisme, Nutrition; Hôpital Huriez, CHU Lille; Inserm U1190, Institut Génomique Européen pour le Diabète, Université de Lille, F-59000 Lille, France. Electronic address:
The differential diagnosis of primary hyperparathyroidism can be considered clinically, biologically and radiologically. Clinically, primary hyperparathyroidism should be suspected in case of diffuse pain, renal lithiasis, osteoporosis, repeated fracture, cognitive or psychiatric disorder, or disturbance of consciousness. Nevertheless, the differential diagnosis of primary hyperparathyroidism is mainly biological, particularly in atypical forms, which must be differentiated from hypercalcemia with hypocalciuria or non- elevated PTH on the one hand, and from normo-calcemia with elevated PTH, hypophosphatemia or hypercalciuria on the other.
View Article and Find Full Text PDFStructural basis of phosphate export by human XPR1.
Nat Commun
January 2025
Center for Life Sciences, Yunnan Key Laboratory of Cell Metabolism and Diseases, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, China.
Phosphorus in crucial for all living organisms. In vertebrate, cellular phosphate homeostasis is partly controlled by XPR1, a poorly characterized inositol pyrophosphate-dependent phosphate exporter. Here, we report the cryo-EM structure of human XPR1, which forms a loose dimer with 10 transmembrane helices (TM) in each protomer.
View Article and Find Full Text PDFStructure of Hydrothermally Stable Acid Sites and their Catalytic Role in P-Modified ZSM-5 Zeolite Revealed by Solid-State NMR Spectroscopy.
Inorg Chem
January 2025
State Key Laboratory of Molecular & Process Engineering, SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China.
The ZSM-5 zeolite is the key active component in high-severity fluid catalytic cracking (FCC) catalysts and is routinely activated by phosphorus compounds in industrial production. To date, however, the detailed structure and function of the introduced phosphorus still remain ambiguous, which hampers the rational design of highly efficient catalysts. In this work, using advanced solid-state NMR techniques, we have quantitatively identified a total of seven types of P-containing complexes in P-modified ZSM-5 zeolite and clearly revealed their structure, location, and catalytic role.
View Article and Find Full Text PDFApplication of artificial intelligence for nutrient estimation in surface water bodies of basins with intensive agriculture.
Integr Environ Assess Manag
January 2025
División de Estudios de Posgrado e Investigación, Tecnológico Nacional de México/IT de Culiacán, Culiacán, Sinaloa, México.
Eutrophication is one of the most relevant concerns due to the risk to water supply and food security. Nitrogen and phosphorus chemical species concentrations determined the risk and magnitude of eutrophication. These analyses are even more relevant in basins with intensive agriculture due to agrochemical discharges.
View Article and Find Full Text PDFSpatial heterogeneity of soil factors enhances intraspecific variation in plant functional traits in a desert ecosystem.
Front Plant Sci
December 2024
College of Ecology and Environment, Xinjiang University, Urumqi, China.
Introduction: Functional traits of desert plants exhibit remarkable responsiveness, adaptability and plasticity to environmental heterogeneity.
Methods: In this study, we measured six crucial plant functional traits (leaf carbon, leaf nitrogen, leaf phosphorus, leaf thickness, chlorophyll concentration, and plant height) and employed exemplar analysis to elucidate the effects of soil environmental heterogeneity on intraspecific traits variation in the high-moisture-salinity and low-moisture-salinity habitats of the Ebinur LakeWetland National Nature Reserve.
Results: The results showed that (1) The soil moisture and electrical conductivity heterogeneity showed significant differences between the two moisture-salinity habitats.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!