Article
Plant Sciences
Naimatullah Mangi, Mian Faisal Nazir, Xiaoyan Wang, Muhammad Shahid Iqbal, Zareen Sarfraz, Ghulam Hussain Jatoi, Tahir Mahmood, Qifeng Ma, Fan Shuli
Summary: Photosynthesis plays a crucial role in the reproductive sink of cotton, especially from carbon assimilation in the subtending leaves. This study investigated the source-sink relationship of boll subtending leaves in upland cotton, identifying different genotypes with varied treatment effects and potential for further breeding programs focused on improving cotton yield and fiber quality. The analysis revealed significant correlations between different traits and categorized germplasm accessions into distinct groups based on the subtending leaf removal treatment effects.
Article
Environmental Sciences
Tenzin Tsering, Mika Sillanpaa, Mirka Viitala, Satu-Pia Reinikainen
Summary: Microplastics pollution in high altitude remote lakes in the Indian Himalaya was assessed in this study. Different pretreatment methods were used, and the importance of harmonization in microplastics studies was demonstrated. The findings contribute to a better understanding of microplastics pollution and the importance of reporting complete information in research.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Plant Sciences
Sergio L. Cavalheiro-Filho, Lisia M. S. Gestinari, Tatiana U. P. Konno, Mirella P. Santos, Emiliano N. Calderon, Mariana C. H. Marques, Fernando M. G. Dos Santos, Alexandre Castilho, Rodrigo L. Martins, Francisco A. Esteves, Naiara Campos
Summary: Study found differences in morphological traits between Isoetes cangae and Isoetes serracarajensis, including characters such as megasporangium color and megaspore ornamentation. The discovery of stomata in I. serracarajensis is related to its amphibious habit. Furthermore, some characters used in species descriptions were found to be variable, indicating the influence of seasonality and habitat characteristics on the morphological diversity of these lycophytes.
AMERICAN FERN JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Helio Junior Lima Monteiro, Artur Corval, Debora Grala Roldao, Mozart Henrique Teixeira
Summary: This study aims to understand the igneous processes involved in the genesis of acidic rocks inserted in the Serra Sul district in the Mineral Province of Carajas, Para. Through field, petrographic, and geochemical data, the researchers were able to determine the composition and formation of these rocks in relation to the banded iron formations of the Carajas Formation.
BOLETIM PARANAENSE DE GEOCIENCIAS
(2022)
Article
Environmental Sciences
James D. Blount, Leah E. K. Lenoch, Faith A. Fitzpatrick
Summary: This study quantified the sources of suspended sediment and sediment-bound phosphorus in Apple Creek through stream sediment budget and fingerprinting techniques. It identified streambank erosion as the main contributor to suspended sediment and revealed the influence of seasonality and streamflow on the relative proportion of suspended sediment.
JOURNAL OF GREAT LAKES RESEARCH
(2022)
Article
Environmental Sciences
Tales Tiecher, Rafael Ramon, Leonardo C. de Andrade, Flavio A. O. Camargo, Olivier Evrard, Jean P. G. Minella, J. Patrick Laceby, Edson C. Bortoluzzi, Gustavo H. Merten, Danilo S. Rheinheimer, Desmond E. Walling, Claudia A. P. Barros
Summary: The objective of this research is to improve understanding of sediment source contributions to one of the largest lakes in South America by using sediment source tracing techniques and sediment flux monitoring. The results demonstrate the effectiveness of this approach in estimating sediment contributions from individual tributaries in large and complex delta systems.
JOURNAL OF GREAT LAKES RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Ce Wang, Letian Zeng, Yaping Lei, Jieming He, Heqi Cui, Ming Su
Summary: Analysis of major and trace elements in sedimentary rocks from the northwestern South China Sea revealed a predominant source from granitic rocks and immature sediments with weak to intermediate chemical weathering. The Red River catchment was identified as the primary source region for the northern Yinggehai-Song Hong Basin since the late Oligocene, with variations in element contents and ratios reflecting multi-stage tectonic activities and provenance shifts.
Article
Environmental Sciences
Alemayehu Esayas Masresha, Lindis Skipperud, Zinabu Gebremariam, Sondre Meland, Brit Salbu
Summary: This study focuses on the concentrations and mobility of trace elements in surface sediments from three Ethiopian Rift Valley Lakes. The results show that certain elements exceed the threshold for potential negative effects on benthic organisms.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
JiaRu Dai, QiaoYing Zhang, JingJing Liu, ShuaiLong Wen, YuFeng Zhang, Ding He, YingXun Du
Summary: Iron coprecipitation with organic matter (OM) plays a role in the biogeochemical cycles of lakes, affecting the immobilization of phosphorus. The presence of algae-dominated zones inhibits the coprecipitation of phosphate, resulting in lower immobilization of OC and P during the coprecipitation process.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Xiaolei Wang, Qingfeng Jiang, Zihan Zhao, Ximou Han, Jinliang Liu, Qun Liu, Bin Xue, Hao Yang
Summary: Investigating the impacts of climatic factors and human activities on sedimentary records of heavy metal contamination in lakes is essential. This study conducted spatiotemporal analysis on two adjacent plateau fault-bound lakes in southwest China and found that grain size and heavy metal concentrations differed between the lakes. The study also found that heavy metal burial rates were mainly influenced by sediment accumulation rates rather than heavy metal concentrations. Additionally, the study identified both natural and anthropogenic sources of heavy metals, with population density and gross domestic product playing significant roles in heavy metal contamination.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Biodiversity Conservation
Jose Tasso Felix Guimaraes, Luciano Costa, Daniela Cristina Zappi, Wilson Filgueira Batista Junior, Karen da Silva Lopes, Ronnie Cley de Oliveira Alves, Luiza de Araujo Romeiro, Edilson Freitas da Silva, Lea Maria Medeiros Carreira, Tarcisio Magevski Rodrigues, Tereza Cristina Giannini, Vera Lucia Imperatriz-Fonseca, Ortrud Monika Barth
Summary: The honey pollen samples from Melipona seminigra pernigra Moure & Kerr 1950 collected between 2017 and 2019 aimed to evaluate the seasonal floral availability in undisturbed and mining-influenced areas. The study identified around one hundred pollen types mainly belonging to Fabaceae, Myrtaceae, and Euphorbiaceae, with the mining area showing higher richness. The primary bee sources were widespread and not significantly different between the two areas, indicating the potential for using native plants in mined area revegetation.
Article
Geosciences, Multidisciplinary
Ianna Ferreira de Lima, Ronaldo Pierosan, Marcia Aparecida de Sant'Ana Barros, Rogerio Roque Rubert, Carlos Augusto Sommer, Diogo Isamu de Almeida Okuno
Summary: The Amazonian Craton is a Pre-Cambrian tectonic segment occupying a large area in the northern part of the South American Platform, with volcano-plutonic rocks providing important clues for the geological extension of the region. Whole-rock geochemistry indicates an A2-type granite affinity, and U-Pb zircon dating suggests a magmatic evolution from a single stratified magma chamber.
BRAZILIAN JOURNAL OF GEOLOGY
(2021)
Article
Environmental Sciences
Prafulla Kumar Sahoo, Roberto Dall'Agnol, Simonny do C. Simoes Rolo de Deus, Gabriel Negreiros Saloma, Jose Tasso Felix Guimaraes, Romulo Simoes Angelica, Silvio Junio Ramos, Marlene Furtado da Costa, Jose Oswaldo de Siqueira
Summary: This study conducted a comprehensive investigation on the level of total Hg (THg) in different environmental media in Itacaiunas River Watershed (IRW), Brazil, aiming to understand the source and distribution of Hg and its potential risks to ecological and human health. The results showed that most of the soils and sediments had higher Hg content compared to the average values, but only a few samples exceeded the legal limits. The water samples were not significantly contaminated by Hg. The distribution of Hg in soils and sediments was closely related to geological factors, indicating limited anthropogenic influence. The main factor controlling the distribution of Hg was organic matter. The ecological and health risk assessments revealed low pollution and non-carcinogenic health risks. This study provides important information for Hg risk assessment and future research in the Amazonia region.
ENVIRONMENTAL RESEARCH
(2023)
Review
Engineering, Environmental
Pawan Kumar Rose, Monika Jain, Navish Kataria, Prafulla Kumar Sahoo, Vinod Kumar Garg, Anoop Yadav
Summary: The presence of microplastics in various environmental components is a growing concern due to their small size and potential health risks. The prevalence and dispersion of microplastics have been extensively studied in the past decade, but there is a lack of systematic research on their fate and transport considering multimedia environmental systems and mitigation measures. Moreover, limited studies have focused on the routes of human exposure to microplastics. This review evaluates 380 articles to uncover the extent of microplastic pollution in different environmental components and its impact on ecosystems and human health.
GROUNDWATER FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Ecology
Luiza de Araujo Romeiro, Rafael Cabral Borges, Edilson Freitas da Silva, Jose Tasso Felix Guimaraes, Tereza Cristina Giannini
Summary: This study uses pollen loads from bee specimens to infer interactions between bees and plants in the Carajas National Forest and its surroundings. It also aims to determine the trophic niches of bee species and identify priority plant species for restoring interaction networks in deforested areas.
ARTHROPOD-PLANT INTERACTIONS
(2023)
Article
Geosciences, Multidisciplinary
Jose Tasso Felix Guimaraes, Edilson Freitas da Silva, Keyvilla da Costa Aguiar, Karen da Silva Lopes, Mariana Maha Jana Costa de Figueiredo, Luiza Santos Reis, Tarcisio Magevski Rodrigues, Tereza Cristina Giannini, Cecilio Frois Caldeira
Summary: Isoetes communities in South America have high diversity, with two recently discovered species (I. serracarajensis and I. cangae) in the Carajás Mountain Range in southeastern Amazonia. Population dynamics and conservation status of these species were studied by identifying and quantifying their megaspores in sediment cores of upland lakes. The results show that drier climate conditions lead to the dehydration of swamps and ponds, restricting I. serracarajensis to eutrophicated lakes. On the other hand, the sensitive population of I. cangae declined due to eutrophication. Future climate and hydrological stress may further threaten the habitats and endangered populations of Isoetes.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Engineering, Chemical
Tikina Rani Sethy, Trinath Biswal, Prafulla Kumar Sahoo
Summary: Recently, polymer nanocomposite hydrogel (PNC-hydrogel) has attracted attention for its cost effectiveness, high processability, modified surface area, and enhanced absorptivity in water remediation. Chitosan-based bionanocomposite hydrogel (SCB-hydrogel) has been prepared and investigated for adsorbing toxic heavy metallic ions from wastewater. The grafted biopolymer-based SCB-hydrogel showed high adsorption efficiency and reusability for lanthanide ions, making it a promising bio-adsorbent for wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Environmental Sciences
Jose Tasso Felix Guimaraes, Prafulla Kumar Sahoo, Pedro Walfir Martins Souza-Filho, Marcio Sousa da Silva, Tarcisio Magevski Rodrigues, Edilson Freitas da Silva, Luiza Santos Reis, Mariana Maha Jana Costa de Figueiredo, Karen da Silva Lopes, Aline Mamede Moraes, Alessandro Saba Leite, Renato Oliveira da Silva Junior, Gabriel Negreiros Salomao, Roberto Dall'Agnol
Summary: The upland lakes in Carajas, southeastern Amazonia, were extensively studied and multiple datasets were generated to explain their formation and evolution. The evolution of these lakes occurred during the Pliocene-Pleistocene periods through subsidence of the lateritic crust promoted by fault reactivation. The multielement geochemical signature of the sediments indicates that they were derived from weathered canga and ferruginous soils, and the organic matter came from both autochthonous and allochthonous sources.
Article
Environmental Sciences
Anjali Kerketta, Hemant Kumar, Mike A. Powell, Prafulla Kumar Sahoo, Harmanpreet Singh Kapoor, Sunil Mittal
Summary: This study conducted a systematic review and meta-analysis of relevant studies from 11 Asian countries to evaluate the differences in trace element accumulation in different crops. The results showed that different vegetable crops had varying levels of trace element accumulation, with leafy vegetables having the highest accumulation. For cereal crops, wheat had the highest metal contents. The majority of vegetable and cereal crop contaminations exceeded the safe limits in Bangladesh, China, India, Iran, and Pakistan.
CURRENT POLLUTION REPORTS
(2023)
Article
Engineering, Environmental
Pawan Kumar Rose, Rajat Kumar, Rakesh Kumar, Manish Kumar, Prabhakar Sharma
Summary: This study synthesized a chemically modified, cationic amino-modified walnut shell (CMWS) adsorbent to effectively remove CR dye contamination from water. Through the experimental design, optimal conditions for dye removal were determined, and CMWS demonstrated higher removal efficiency than raw walnut shell (RWS). The study also analyzed the cost-effectiveness and practical applicability of CMWS, finding it to be a potential adsorbent for CR dye removal.
GROUNDWATER FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Environmental Sciences
Gabriel Negreiros Salomao, Roberto Dall'Agnol, Prafulla Kumar Sahoo, Gabriel Soares de Almeida, Rafael Tarantino Amarante, Leiliane Bozzi Zeferino, Joao Paulo Nobre Lopes, Pedro Walfir Martins Souza Filho, Normara Yane Mar da Costa, Jose Tasso Felix Guimaraes, Marcio Sousa da Silva, Gabriel Caixeta Martins, Mayara Fraeda Barbosa Teixeira, Eduardo Duarte Marques, Romulo Simoes Angelica, Wilker Emmanoel Oliveira Araujo
Summary: The expansion of human occupation and economic activity, as well as deforestation, is negatively impacting the Amazon ecosystem, especially in the Itacaiunas River Watershed. Artisanal mining (ASM) has caused anthropogenic impacts on the surface water quality and hydrogeochemical characteristics of the region. The study provides evidence of pollution and deterioration of water quality due to ASM.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Studies
Danieli Mara Ferreira, Paulo Rogenes Monteiro Pontes, Roberto Dall'Agnol, Tasso Guimaraes, Gabriel Salomao, Marcio Sousa Silva
Summary: This study models the transport and fate of 19 metals in the Parauapebas river in Brazil, evaluating the risks associated with threshold exceedances. The results indicate iron, manganese, and aluminum as the main substances of concern for surface water quality. Point sources have a larger impact on water quality during the dry season, while diffuse contributions have a larger impact during the rainy season, especially in deforested areas. The modeling framework can guide pollution control and remediation efforts for stakeholders in the public or industrial sectors.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2023)
Article
Multidisciplinary Sciences
Sanae N. Hayashi, Pedro Walfir M. Souza-filho, Wilson R. Nascimento Jr, Marcus E. B. Fernandes
Summary: RapidEye satellite images were used to analyze changes in mangrove forests and salt flats caused by human activities on the Brazilian Amazon coast. The results show that the mangroves in this area are well preserved, with less than 1% converted to other uses, mainly urban areas and roads. Unlike in other regions, aquaculture plays a secondary role in mangrove loss on the Amazon coast. However, more attention and supportive policies are still needed for these human activities, which are driven by anthropogenic pressures.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2023)
Article
Multidisciplinary Sciences
Edilson F. Da Silva, Karen S. Lopes, Ronnie Alves, Lea Maria M. Carreira, Delmo F. Da Silva, Luiza A. Romeiro, Wilson F. Batista Jr, Tarcisio M. Rodrigues, Ricardo S. Secco, Jose Tasso F. Guimaraes
Summary: This study presents an integrated approach to refine paleoclimate and paleohydrological changes based on upland lake sediments in southeastern Amazonia. The results suggest a transition from lower temperatures and increased marshy conditions in the Early Pleistocene to higher temperatures and lower humidity in the Late and Middle Holocene. The pollen records indicate increased humidity in the Early Holocene.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2023)
Article
Geosciences, Multidisciplinary
David Dominguez-Santos, Daniel Valderrama, Ahmet Utku Yazgan
Summary: This document presents a study comparing the spectra of large-magnitude seismic records in Chile between 2012 and 2022 with the design spectra of NCh433 and D. S 61. The aim is to determine if Chile's seismic-resistant regulations are updated to the existing reality and propose new design spectra that better represent the seismic activity in Chile during the last decade.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Prabhu Palanisamy, Vivek Sivakumar, Priya Velusamy, Logesh Natarajan
Summary: Shoreline changes in the southern coast of Rio de Janeiro, Brazil, were analyzed from 1986 to 2018. The study found that both natural and human factors significantly impact shoreline changes. The findings provided important insights into predicting future shoreline positions and identifying vulnerable regions. Additionally, human activities were found to influence shoreline change models, emphasizing the need for effective management strategies to protect ecosystems and communities.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Irina Salgado Bernal, Periyasamy Sivalingam, Armando Martinez Sardina, Michel Manduca Artiles, Maria E. Carballo Valdes, John Pote
Summary: This study investigated the presence of 15 toxic metals in surface sediment in a tropical river ecosystem in Cuba. The results showed that the sediments had higher concentrations of four metals compared to Cuban norms. Various contamination indices were calculated, and correlations analysis revealed the main sources of contamination. The study provides important information for the management of the river and emphasizes the need for metal pollution control and monitoring.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Camila Morgan, Eduardo Morgado, Miguel-Angel Parada, Raimundo Brahm, Francisca Mallea-Lillo
Summary: Lanin volcano is a composite volcano in the Andes, which has erupted lava flows with different compositions. The volcano's magma reservoir contains a crystal mush, and the pre-eruptive conditions include temperature, pressure, and oxygen fugacity. Fractional crystallisation has led to the evolution of the magma with different compositions.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Benjamin Idini, Sergio Ruiz, Jean-Paul Ampuero, Felipe Leyton, Efrain Rivera
Summary: This study investigates the role of wedge integrity on the frequency content of strong ground motion produced by subduction earthquakes in Northern Chile. The results show that the frequency characteristics of seismic waves vary with hypocentral distance, indicating lateral variations in anelastic attenuation due to the heterogeneous tectonic structure.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)