Institutional Repository of Yantai Institute of Coastal Zone Research, CAS
Not a member yet
13079 research outputs found
Sort by
Monitoring and Evaluation of Coastal Ecological Carrying Capacity in the Context of Sustainable Development: A Case Study of Shandong Province
No full textThe research on coastal ecological carrying capacity holds great significance for the sustainable development of coastal areas and is a focal point of the United Nations Sustainable Development Goals (SDGs). This study coupled multi-source data and ecological analysis models to construct a multi-level evaluation system and analysis method for the coastal ecological carrying capacity of Shandong Province so as to realize the dynamic monitoring and evaluation of the coastal ecological carrying capacity of Shandong Province from 2010 to 2020. The results indicated: (1) The ecological carrying capacity of the coastal zone in Shandong Province showed a "U"-shaped development trend, with 2016 being a turning point. (2) The economic development-social support system gradually became the main force driving the overall improvement of coastal ecological carrying capacity. (3) The system coupling coordination degree of ecological carrying capacity in the coastal areas of Shandong Province showed a trend of first decreasing and then increasing, with a high level of internal coupling coordination of carrying capacity. (4) Per capita GDP, environmental protection investment, per capita water resources, and other indicators were the main factors driving the changes in the ecological carrying capacity of the coastal zone. This study aims to provide methodological reference and data support for coastal ecosystem monitoring, assessment, and climate change response
Exploring the factors influencing the carbon sink function of coastal wetlands in the Yellow River Delta
No full textUnderstanding the mechanisms of the coastal wetland ecosystem carbon sink function is crucial for adapting to, mitigating, and predicting global climate change. Landscape metrics and Carnegie Ames Stanford Approach (CASA) model were used to quantify the spatiotemporal patterns of soil organic carbon (SOC) and vegetation carbon sequestration (VCS) in the Yellow River Delta (YRD). GeoDetector model was used to explore the effects of various factors influencing VCS. The results showed that: (1) From 1999 to 2020, the area of natural wetlands and non-wetlands decreased, while the area of artificial wetlands increased. (2) The SOC stock in the 0 similar to 100 cm depth in 1999 and 2020 were about 7.8871 Tg C and 7.0521 Tg C, respectively. The amount of VCS increased from 0.2309 Tg C in 2000 to 0.3681 Tg C in 2020, with a significant annual increase of 6532 Mg C. In the past 21 years, the total carbon sink in the YRD was 6.0952 Tg C. The amount of VCS was equivalent to 2.93% of SOC stock in 1999, rising to 5.22% by 2020. (3) Vegetation cover has the greatest influence on the carbon sink function in the YRD, followed by precipitation and biodiversity. From 2000 to 2020, the effect of biodiversity on the carbon sinks of natural wetlands and artificial wetlands increased. The synergistic effect of wetland type and vegetation cover on carbon sink effect was replaced by the synergistic effect of biodiversity and vegetation cover. The identification of the primary factors that influence VCS in the YRD is significant to the understanding of the spatiotemporal evolution of carbon sink effect in coastal wetland ecosystems, and to the guidance of the rational development and protection of coastal wetlands and promote sustainable ecosystem development
Chemical Warfare in the Environment-Secondary Metabolites From Starfish (<i>Asterias amurensis</i>) Induce Teratogenicity in Medaka Embryos (<i>Oryzias melastigma</i>)
No full textStarfish saponins, known for their role as feeding deterrents against predators like crabs and fish, have been extensively studied for their antifeedant and cytolytic effects. Recent research suggests that starfish secondary metabolites possess antifouling and antifeedant properties and play a role in biological interactions and various ecological functions. Previous research demonstrated that saponins from starfish exert their toxic effects on fish by interacting with cholesterol in the blood cell membrane. This study investigated the hypothesis that secondary metabolites, other than saponins, from the starfish Asterias amurensis may be harmful to fish eggs, particularly marine medaka (Oryzias melastigma) eggs, which share starfish habitat. We systematically separated the secondary metabolites of A. amurensis by a variety of chromatographic methods. Two oligoglycosides related to embryonic teratogenicity were identified, including one previously undescribed tetrasaccharide (1) and one known pyrrole oligoglycoside (2). Their structures were established mainly on the basis of detailed analysis of the nuclear magnetic resonance spectroscopy (NMR) and mass spectroscopic data. Compounds 1 and 2 exhibited strong lethality and significantly reduced voluntary movements in medaka embryos, with compound 2 showing more pronounced effects on teratogenicity and heart rates. The main morphological abnormalities observed included delayed head development (DHD), tiny spines (TS), incomplete absorption of oil balls (OB), cardiac abnormalities (CA), and shrunken yolk sacs (SYS). Our findings imply that starfish secondary metabolites may have broader ecological effects, influencing habitat-sharing species in subtle but crucial ways
Efficient degradation of bisphenol A and amino black 10B by magnetic composite Fe3O4@MOF-74 as catalyst
No full textMetal-organic frameworks (MOFs) exhibit high chemical stability and porosity, and have been widely applied in various fields including selective adsorption and separation, sensors, and catalysis. When combined with Fe3O4, they effectively address issues such as aggregation of Fe3O4 particles and the difficulty in recovering MOFs as catalysts. Therefore, in this study, we used a simple solvothermal method as a catalyst to synthesize a high specific surface area magnetic composite Fe3O4@MOF-74, which was used to catalyze the degradation of bisphenol A (BPA) and amino black 10B in wastewater. We activated Na2S2O8 to generate radicals for oxidizing and degrading BPA and amino black 10B. Experimental results showed that at 35 degrees C, with Fe3O4@MOF-74 (Fe3O4: MOF-74=1:1) concentration of 0.2 g/L and Na2S2O8 concentration of 2 g/L, the catalytic effect is efficient and economical. Meanwhile, removal rates of BPA and amino black 10B exceeded 95.58 % over a broad pH range (pH 3-9). Furthermore, even after multiple cycles of use, Fe3O4@MOF-74 maintained catalytic degradation rates of BPA and amino black 10B above 93.24 % and 95.01 %, respectively. Additionally, in water samples, removal rates of BPA and amino black 10B exceeded 91.55 %. This study provides a new and efficient catalyst material for wastewater treatment, which is expected to play an important role in environmental remediation
A metabolomics-based fast-growing strain breeding method for unicinctus unicinctus
No full text本发明提供一种基于代谢组学的单环刺螠速生品系选育方法，属水产新品种创制领域。通过对比同批次生长速率差异个体体壁组织代谢物的异同，筛选出与速生相关的差异代谢物。以此作为指标选育速生群体。本发明的选育方法与常规迭代选育相比，选育速度大幅加快，为单环刺螠新品系选育和新品种开发提供了新路径
A block copolymer and its preparation method and ultrafiltration membrane and its preparation method
No full text本发明提供了一种嵌段共聚物及其制备方法和超滤膜及其制备方法，属于嵌段共聚物合成领域。本发明通过异丁酰溴封端的聚砜与酰胺单体反应制备了嵌段共聚物，所述嵌段共聚物为ABA结构的三嵌段共聚物，所述ABA结构中的A段为聚酰胺，B段为异丁酰溴封端的聚砜。本发明还通过嵌段共聚物配置成铸膜液，所述铸膜液经过相转化制备成超滤膜；所述超滤膜为多孔结构，具有两亲性，在富集过程中抗污染、防堵塞；所述超滤膜为双层结构，分为截留层和支撑层。本发明所述超滤膜孔隙率高，在海水富集过程中的水通量高，富集倍数高，抗污染能力强，解决了孔径易堵塞的问题，能实现海水中胶体态物质的快速分离和富集
A chitosan containing thiophene group and its preparation method and application
No full text本发明涉及海洋化工工程领域，具体涉及一种含噻吩基团的壳聚糖及其制备方法和应用。含噻吩基团的壳聚糖结构如式一所示；其制备方法简单，原料来源广泛，无副作用。实验证明，所得的含噻吩基团的壳聚糖衍生物具有良好的抗氧化活性及抑菌活性，可广泛应用于农业、医药和食品等领域。式一
A block copolymer and its preparation method and ultrafiltration membrane and its preparation method
No full text本发明提供了一种嵌段共聚物及其制备方法和超滤膜及其制备方法，属于嵌段共聚物合成领域。本发明通过异丁酰溴封端的聚砜与酰胺单体反应制备了嵌段共聚物，所述嵌段共聚物为ABA结构的三嵌段共聚物，所述ABA结构中的A段为聚酰胺，B段为异丁酰溴封端的聚砜。本发明还通过嵌段共聚物配置成铸膜液，所述铸膜液经过相转化制备成超滤膜；所述超滤膜为多孔结构，具有两亲性，在富集过程中抗污染、防堵塞；所述超滤膜为双层结构，分为截留层和支撑层。本发明所述超滤膜孔隙率高，在海水富集过程中的水通量高，富集倍数高，抗污染能力强，解决了孔径易堵塞的问题，能实现海水中胶体态物质的快速分离和富集
Habitat suitability assessment for Saunders's Gull (Saundersilarus saundersi) in the Yellow River Delta, China
No full textThe Yellow River Delta (YRD) is a key breeding place for Saunders's Gull (Saundersilarus saundersi), one of the vulnerable birds in the world. Thus, a thorough understanding of the key environmental factors influencing its suitable habitat holds great value for its conservation. Previous researches focused on Saunders's Gull's population changes and habitat features of breeding places in the nature reserve. However, its habitat suitability in the whole YRD has not been studied systematically, hindering the formulation of macro-protection policies to a certain extent. On the basis of occurrence records and environmental variables, we constructed an optimized MaxEnt model using the 'kuenm' R package to investigate the potential distribution of suitable habitat for the Saunders's Gull in the YRD. Results showed that the ideal hyperparameters for the MaxEnt model were a feature combination of linear and quadratic terms, and the regularization multiplier of 0.6 after optimization, indicated a high level of prediction accuracy. The environmental factors that had a significant effect on the Saunders's Gull's distribution were land use and land cover, percentage of beach saline-alkali land (PLAND_55) and distance to coastline (D_coastline). The highly suitable habitat had an area of 258.56 km2, of which 66.63% was located within the YRD National Nature Reserve. The management of constructed wetlands should be combined with the protection of natural wetlands to avoid the disadvantage of 'isolated island-type' protection. The study provides insights into the quantitative relationship between waterfowl and their habitat, providing support for the sustainable development of the YRD, with certain practical significance
Structural framework for the understanding spectroscopic and functional signatures of the cyanobacterial Orange Carotenoid Protein families
No full textThe Orange Carotenoid Protein (OCP) is a unique photoreceptor crucial for cyanobacterial photoprotection. Best studied Synechocystis sp. PCC 6803 OCP belongs to the large OCP1 family. Downregulated by the Fluorescence Recovery Protein (FRP) in low-light, high-light-activated OCP1 binds to the phycobilisomes and performs non -photochemical quenching. Recently discovered families OCP2 and OCP3 remain structurally and functionally underexplored, and no systematic comparative studies have ever been conducted. Here we present two first crystal structures of OCP2 from morphoecophysiologically different cyanobacteria and provide their comprehensive structural, spectroscopic and functional comparison with OCP1, the recently described OCP3 and all-OCP ancestor. Structures enable correlation of spectroscopic signatures with the effective number of hydrogen and discovered here chalcogen bonds anchoring the ketocarotenoid in OCP, as well as with the rotation of the echinenone's beta-ionone ring in the CTD. Structural data also helped rationalize the observed differences in OCP/ FRP and OCP/phycobilisome functional interactions. These data are expected to foster OCP research and applications in optogenetics, targeted carotenoid delivery and cyanobacterial biomass engineering