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Santos AN, Willkens Y, Silva LFN, Melo FTDV, Fernandes TF. A new species of Oxyascaris Travassos, 1920 (Nematoda: Cosmocercoidea) parasite of Leptodeira annulata (Serpentes: Colubridae) from Brazil, with a key to the species of the genus. Int J Parasitol Parasites Wildl 2023; 22:243-248. [PMID: 38059178 PMCID: PMC10696307 DOI: 10.1016/j.ijppaw.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/06/2023] [Accepted: 11/06/2023] [Indexed: 12/08/2023]
Abstract
During a helminthological survey of snakes in the Cerrado Biome in Maranhão State, Brazil, we found intestinal nematodes in Leptodeira annulata (Linnaeus), belonging to the genus Oxyascaris Travassos, 1920. We observed that the specimens found are distinct from their congeners by the combination of presented characters, mainly the cuticular expansion at the anterior region of the body, presence of a single papilla at the anterior cloacal lip, number, and arrangement of caudal papillae, presence of somatic papillae along body cuticle, as well as some morphometric characters. Thus, we describe the new species using light and scanning electron microscopy and, revise the morphological characters used to identify Oxyascaris spp. and propose a key to the species of the genus. Therefore, we describe the seventh species in the genus, the second reported to parasitize snakes, the sixth species recorded in Brazil, and the first described in the Cerrado Biome.
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Affiliation(s)
- Ana Nunes Santos
- Laboratory of Cell Biology and Helminthology “Prof. Dr. Reinalda Marisa Lanfredi”, Institute of Biological Sciences, Federal University of Pará, Av. Augusto Corrêa 01, Guamá, 66075-110, Belém, Pará, Brazil
| | - Yuri Willkens
- Laboratory of Cell Biology and Helminthology “Prof. Dr. Reinalda Marisa Lanfredi”, Institute of Biological Sciences, Federal University of Pará, Av. Augusto Corrêa 01, Guamá, 66075-110, Belém, Pará, Brazil
| | - Luiz Fernando Neres Silva
- Faculdade Facimp Wyden, Av. Prudente de Morais, s/n, Parque Sanharol, 65914-335, Imperatriz, Maranhão, Brazil
| | - Francisco Tiago de Vasconcelos Melo
- Laboratory of Cell Biology and Helminthology “Prof. Dr. Reinalda Marisa Lanfredi”, Institute of Biological Sciences, Federal University of Pará, Av. Augusto Corrêa 01, Guamá, 66075-110, Belém, Pará, Brazil
| | - Thayane Ferreira Fernandes
- Faculdade Facimp Wyden, Av. Prudente de Morais, s/n, Parque Sanharol, 65914-335, Imperatriz, Maranhão, Brazil
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Alves-Santos AM, Sampaio KB, Lima MDS, Coelho ASG, Souza ELD, Naves MMV. Chemical composition and prebiotic activity of baru (Dipteryx alata Vog.) pulp on probiotic strains and human colonic microbiota. Food Res Int 2023; 164:112366. [PMID: 36737953 DOI: 10.1016/j.foodres.2022.112366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 12/08/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
Little knowledge is available in literature regarding the chemical composition and health-promoting effects of baru (Dipteryx alata Vog.) pulp, a by-product usually discarded by the agro-industry during the processing of baru fruit. This study evaluated the chemical composition of baru pulp and investigated its prebiotic activity on distinct probiotic strains and human colonic microbiota with in vitro assays. Baru pulp had high contents of insoluble dietary fibers and phenolic compounds (mainly hesperidin). Baru pulp stimulated the growth and metabolism of the probiotics Bifidobacterium animalis subsp. lactis BB-12, Lactobacillus acidophilus LA-05, and Lacticaseibacillus casei L-26. In addition, digested baru pulp induced significant benefits on the human colonic microbiota, increasing the relative abundance of Lactobacillus-Enterococcus, Bifidobacterium, and Bacteroides-Prevotella, as well as the production of lactate, acetate, propionate, and butyrate. The results show that baru pulp has potential prebiotic properties to be explored in the formulation of new health-promoting foods.
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Affiliation(s)
- Aline Medeiros Alves-Santos
- Laboratory of Experimental Nutrition, School of Nutrition, Federal University of Goiás (UFG), Goiânia, Brazil
| | - Karoliny Brito Sampaio
- Laboratory of Food Microbiology, Department of Nutrition, Federal University of Paraíba, João Pessoa, Brazil
| | - Marcos Dos Santos Lima
- Department of Food Technology, Federal Institute of Sertão Pernambucano, Petrolina, Brazil
| | | | - Evandro Leite de Souza
- Laboratory of Food Microbiology, Department of Nutrition, Federal University of Paraíba, João Pessoa, Brazil
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Cunha ERD, Santos CAG, Silva RMD, Panachuki E, Oliveira PTSD, Oliveira NDS, Falcão KDS. Assessment of current and future land use/cover changes in soil erosion in the Rio da Prata basin (Brazil). Sci Total Environ 2022; 818:151811. [PMID: 34808178 DOI: 10.1016/j.scitotenv.2021.151811] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 11/09/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
In recent years, the Cerrado biome in Brazil (Brazilian savannah) has faced severe environmental problems due to abrupt changes in land use/cover (LUC), causing increased soil loss, sediment yield and water turbidity. Thus, this study aimed to evaluate the impacts of soil loss and sediment delivery ratio (SDR) over the last 30 years to simulate future scenarios of soil losses from 2050 to 2100 and to investigate an episode of sediment delivery that occurred in the Rio da Prata Basin (RPB) in 2018. In this study, the following were used: an estimation of soil losses for 1986, 1999, 2007 and 2016 using the Revised Universal Soil Loss Equation (RUSLE), an estimation of SDR, sediment export and sediment deposition using the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model, an association of RUSLE factor C to LUC data for 2050 and 2100 based on the CA-Markov hybrid model, and an estimation of future soil erosion scenarios for 2050 and 2100. The results show that over the last 30 years (1986-2016), there has been a reduction in the areas of highly intense and severe degrees. Future soil erosion scenarios (2050-2100) showed a 13.84% increase in areas of soil loss >10 Mg ha-1 year-1. The results highlighted the importance of assessing the impacts of LUC changes on soil erosion and the export of sediments to agricultural watersheds in the RPB, one of the best ecotourism destinations in Brazil. In addition, the increase in soil loss in the region intensified sediment yield events and increased water turbidity. Furthermore, riparian vegetation, although preserved, was not able to protect the watercourse, showing that it is essential to adopt the best management practices in the agricultural production areas of the basin, especially where ramps are extensive or the slope is greater than 2%, to reduce the runoff velocity and control the movement of sediments on the surface towards the drainage canals. The results of this study are useful for drawing up a soil and water conservation plan for the sustainable production of agriculture and maintenance of ecosystem services in the region.
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Affiliation(s)
- Elias Rodrigues da Cunha
- Department of Geosciences, Federal University of Paraíba, João Pessoa, Paraíba, Brazil; Department of Geography, Federal University of Mato Grosso do Sul, Aquidauana, Mato Grosso do Sul, Brazil
| | | | | | - Elói Panachuki
- Department of Agronomy, State University of Mato Grosso do Sul, Agronomy Department, Aquidauana, MS 79200-000, Brazil
| | - Paulo Tarso Sanches de Oliveira
- Graduate Program in Environmental Technologies, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Naelmo de Souza Oliveira
- Department of Agronomy, State University of Mato Grosso do Sul, Agronomy Department, Aquidauana, MS 79200-000, Brazil
| | - Karina Dos Santos Falcão
- Department of Agronomy, State University of Mato Grosso do Sul, Agronomy Department, Aquidauana, MS 79200-000, Brazil
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Santos FC, da Silva Pinto Vieira RM, Barbosa AA, da Cruz Ferreira Y, Polizel SP, Sestini MF, Ometto JPHB. Application of remote sensing to analyze the loss of natural vegetation in the Jalapão Mosaic (Brazil) before and after the creation of protected area (1970-2018). Environ Monit Assess 2022; 194:201. [PMID: 35182226 DOI: 10.1007/s10661-021-09651-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
This study aims to map the changes in land use and land cover between 1970 and 2018, analyzing the influence of the protected area s (PAs) in the Cerrado biome, specifically in the area of the Jalapão Mosaic. Images from the Landsat 1-MSS, 5-TM, and 8-OLI satellites were used and processed in SPRING and ArcGIS software. The analyses were based on three approaches: (1) the boundary of the Jalapão Mosaic, (2) the PAs, and (3) a comparison between the PAs and their surroundings. The Jalapão Mosaic results demonstrated that 26% (≅ 8410 km2) of the area was burned, and 15.5% (4971 km2) was anthropized in at least one of the analyzed periods. Among the PAs, the Serra Geral do Tocantins Ecological Station (Integral Protection) presented the largest burned area (43.7% ≅ 3095 km2); however, there was no significant increase in the anthropized areas due to fire. Meanwhile, the anthropized areas in the Rio Preto and Serra da Tabatinga Environmental Protection Areas (Sustainable Use) increased by 27.5% and by 75%, respectively, due to agricultural expansion. By analyzing the two groups of PAs and their surroundings, it was observed that the loss of natural vegetation was restrained and fires were less intense in the Integral Protection Units; in the Sustainable Use Units, there was a significant increase in the anthropized areas. Furthermore, over 70% of the anthropized areas occurred in the surrounding areas, thus showing the importance of creating PAs.
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Affiliation(s)
- Fabrícia Cristina Santos
- Instituto Nacional de Pesquisas Espaciais-INPE, Caixa Postal 515, Sao Jose dos Campos, SP, 12245-970, Brazil.
| | | | - Alexandre Augusto Barbosa
- Instituto Nacional de Pesquisas Espaciais-INPE, Caixa Postal 515, Sao Jose dos Campos, SP, 12245-970, Brazil
| | - Yara da Cruz Ferreira
- Instituto Nacional de Pesquisas Espaciais-INPE, Caixa Postal 515, Sao Jose dos Campos, SP, 12245-970, Brazil
| | - Silvia Palotti Polizel
- Instituto Nacional de Pesquisas Espaciais-INPE, Caixa Postal 515, Sao Jose dos Campos, SP, 12245-970, Brazil
| | - Marcelo Francisco Sestini
- Instituto Nacional de Pesquisas Espaciais-INPE, Caixa Postal 515, Sao Jose dos Campos, SP, 12245-970, Brazil
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Brito DQ, Santos LHG, Passos CJS, Oliveira-Filho EC. Short-Term Effects of Wildfire Ash on Water Quality Parameters: A Laboratory Approach. Bull Environ Contam Toxicol 2021; 107:500-505. [PMID: 33834282 DOI: 10.1007/s00128-021-03220-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
Climate change coupled with inappropriate burning practices has increased large-scale wildfires in Brazilian tropical savannahs (Cerrado). Considering that the effects of ash from wildfires on water parameters are scarcely known in tropical savannahs, this study investigated the chemical changes caused by ash in the soft water, commonly used for bioassays. To this end, ash samples were collected immediately following a fire in a Cerrado area (Federal District, Brazil) and put into water (1:10 ash:soft-water m/v) to check physical parameters under laboratory conditions. Major water-extractable elements (K+, SO42-, Ca2+, PO43-, Na+, Mg2+) from ash strongly altered water quality parameters: elevated total dissolved solids and conductivity levels as well as an increase in pH and decrease in dissolved oxygen concentration were reported over the course of the experiment (15 days) compared to control conditions. Our results point out relevant solubilized compounds from ashes which may potentially impact water quality in post-fire scenarios.
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Affiliation(s)
- Darlan Q Brito
- Faculty UnB at Planaltina (FUP/UnB) Planaltina, University of Brasília, Brasília, Federal District (DF), 73345-010, Brazil.
- Embrapa Cerrados, Road BR-020, km 18, Planaltina, Federal District (DF), 73310-970, Brazil.
| | - Luiz H G Santos
- Centro Universitário de Brasília (UniCEUB), SEPN 707/907, Asa Norte, Brasília, Federal District (DF), 70790-075, Brazil
- Embrapa Cerrados, Road BR-020, km 18, Planaltina, Federal District (DF), 73310-970, Brazil
| | - Carlos José Sousa Passos
- Faculty UnB at Planaltina (FUP/UnB) Planaltina, University of Brasília, Brasília, Federal District (DF), 73345-010, Brazil
| | - Eduardo C Oliveira-Filho
- Centro Universitário de Brasília (UniCEUB), SEPN 707/907, Asa Norte, Brasília, Federal District (DF), 70790-075, Brazil.
- Embrapa Cerrados, Road BR-020, km 18, Planaltina, Federal District (DF), 73310-970, Brazil.
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Carvalho GOD, Meire RO, Lino AS, Yogui DR, Desbiez ALJ, Torres JPM, Malm O. Biomonitoring mercury contamination using fur from roadkilled giant anteaters. Chemosphere 2021; 270:128644. [PMID: 33121800 DOI: 10.1016/j.chemosphere.2020.128644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 10/04/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
The giant anteater (Myrmecophaga tridactyla) can occur in both preserved and anthropogenic environments in Brazilian biomes. The Cerrado biome, where the samples were collected, is considered one of the world's biodiversity hotspots; however, a large part of it has been converted to pasture and agricultural land. In this environment, animals may be exposed to contaminants, such as mercury (Hg). Despite its immense biodiversity, there are few studies investigating Hg contamination in terrestrial mammals in Brazil. This study aimed to create a baseline for Hg levels in giant anteater fur and establish which biotic and abiotic variables can influence its concentration. Total Hg (THg) concentrations were determined by cold vapor atomic absorption spectrometry in 141 individuals sampled on highways between January and October 2017, in the state of Mato Grosso do Sul, Brazil. THg concentrations in fur ranged from 0.27 to 4.77 μg g -1. The decomposition stage of the carcasses and vehicular traffic volume on highways did not influence the THg concentrations. Juveniles presented lower THg concentrations than adults. A spatial pattern of higher concentrations in the eastern-southeastern region of the state was found, which could be related to anthropogenic impacts; however, no clear links have been established. The THg concentrations in giant anteaters' fur seems higher than expected considering the trophic position of the species. Despite this, the range was in accordance with studies of other Brazilian terrestrial mammals and within safe threshold levels. This study indicates the potential of utilizing roadkilled fauna to monitor large-scale contamination in wildlife.
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Affiliation(s)
- Gabriel Oliveira de Carvalho
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil; SAGE - Núcleo Professor Rogério Valle de Produção Sustentável, Universidade Federal Do Rio de Janeiro (UFRJ), COPPE/UFRJ, Centro de Gestão Tecnológica - CT2 - Rua Moniz de Aragão, No.360 - Bloco 2, Ilha Do Fundão - Cidade Universitária, Rio de Janeiro, Brazil.
| | - Rodrigo Ornellas Meire
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
| | - Adan Santos Lino
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
| | - Débora Regina Yogui
- Instituto de Conservação de Animais Silvestres, Rua Afonso Lino Barbosa, 142, Chácara Cachoeira, Campo Grande, MS, CEP: 79040-290, Brazil; Nashville Zoo, 3777 Nolensville Pike, Nashville, TN, 37211, USA
| | - Arnaud Léonard Jean Desbiez
- Instituto de Conservação de Animais Silvestres, Rua Afonso Lino Barbosa, 142, Chácara Cachoeira, Campo Grande, MS, CEP: 79040-290, Brazil; The Royal Zoological Society of Scotland, Edinburgh Zoo, 134 Corstorphine Road, Edinburgh, EH12 6TS, United Kingdom
| | - João Paulo Machado Torres
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
| | - Olaf Malm
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
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Moura RR, Carvalho RL. A novel trophobiotic interaction between a Neotropical stink bug and an ant species: Insights into potential benefits to the host plant. Behav Processes 2021; 182:104296. [PMID: 33338575 DOI: 10.1016/j.beproc.2020.104296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 11/22/2022]
Abstract
Trophobiotic interactions occur when phytophagous insects provide a sugary liquid, the honeydew, for ants and obtain defence against predators or parasitoids. The plants may indirectly benefit from an increased ant foraging activity by reducing the herbivorous abundance. These three trophic interactions have been previously studied for several species, but mainly involving plants with extrafloral nectaries, which is a plant structure that also produce attractive substances for ants. Previous studies have reported an ant preference for honeydew over extrafloral nectary content. Therefore, trophobiosis can be an important mediator of ant-plant interactions. In this study, we describe a trophobiotic interaction between Edessa contermina stink bugs and Camponotus blandus ants on the Byrsonima verbascifolia plants occurring in a conservation area of Brazilian savanna. Stink bugs excreted a sugary liquid which was consumed by the ants, and C. blandus ants were observed consuming potential parasitoids. Stink bugs were more abundant in plants containing high food supply and shelter availability. The occurrence of ants depended of the number of inflorescences and trunk circumference of B. verbascifolia. Ant abundance, however, was positively correlated with stink bug abundance and the number of inflorescences. Herbivory was not explained by neither plant architecture nor ant abundance. This high ant activity may benefit plants from a protection against herbivory, but we did not detect this effect during the study period. Hence, the interaction among ants and plants was apparently commensal. We concluded that plant traits were important in ant attraction, but stink bugs foraging also increased ant activity on the plant, but mainly on inflorescences. Therefore, the plant may benefit from an increased defence of inflorescences rather than leaves.
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da Cunha ER, Santos CAG, da Silva RM, Bacani VM, Teodoro PE, Panachuki E, de Souza Oliveira N. Mapping LULC types in the Cerrado-Atlantic Forest ecotone region using a Landsat time series and object-based image approach: A case study of the Prata River Basin, Mato Grosso do Sul, Brazil. Environ Monit Assess 2020; 192:136. [PMID: 31980935 DOI: 10.1007/s10661-020-8093-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
In the last 30 years, the growth of the agriculture and livestock industries in the Cerrado biome has caused severe changes in land use and land cover (LULC), and areas previously occupied by native vegetation are changing to agricultural monocultures (e.g., soybean or corn) and/or pastures. Thus, the objective of this study was to analyze the LULC changes for the years 1986, 1999, 2007, and 2016 based on Landsat time series and object-based image analysis (OBIA) for the Prata River Basin. Twelve LULC classes were mapped: riparian forest, cerrado, swampy grasslands, wetlands, semideciduous forest, pasture, agriculture, fallow agricultural land, barren land, eucalyptus, water bodies, and burnt area. The classifications presented results with an overall accuracy of more than 93% and a kappa coefficient of 0.92. In 2007, the pasture class had the highest increase in area (48.5%), with a total area of 118.32 km2 of Cerrado biome vegetation converted to pasture, and the classes banhado, riparian forest, swampy grasslands, and cerrado had the greatest reductions in area (41.58%, 29.67%, 25.44%, and 21.63%, respectively). More precisely, the wetlands class underwent the greatest decrease under the advancement of pasture in the studied period (- 36.2%). These changes are due to factors favorable to agropastoral practices, such as a flat relief and soil with good agricultural suitability. Graphical abstract.
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Affiliation(s)
- Elias Rodrigues da Cunha
- Department of Geosciences, Federal University of Paraíba, João Pessoa, Paraíba, Brazil
- Federal University of Mato Grosso do Sul, Aquidauana, Mato Grosso do Sul, Brazil
| | - Celso Augusto Guimarães Santos
- Department of Civil and Environmental Engineering, Federal University of Paraíba, João Pessoa, Paraíba, 58051-900, Brazil.
| | | | - Vitor Matheus Bacani
- Department of Geography, Federal University of Mato Grosso do Sul, Três Lagoas, Mato Grosso do Sul, Brazil
| | - Paulo Eduardo Teodoro
- Department of Agronomy, Federal University of Mato Grosso do Sul, Chapadão do Sul, Mato Grosso do Sul, Brazil
| | - Elói Panachuki
- Department of Agronomy, State University of Mato Grosso do Sul, Aquidauana, Mato Grosso do Sul, Brazil
| | - Naelmo de Souza Oliveira
- Department of Agronomy, State University of Mato Grosso do Sul, Aquidauana, Mato Grosso do Sul, Brazil
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Guterres A, de Oliveira RC, Fernandes J, Maia RM, Teixeira BR, Oliveira FCG, Bonvicino CR, D'Andrea PS, Schrago CG, de Lemos ERS. Co-circulation of Araraquara and Juquitiba Hantavirus in Brazilian Cerrado. Microb Ecol 2018; 75:783-789. [PMID: 28856421 DOI: 10.1007/s00248-017-1061-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
Hantavirus cardiopulmonary syndrome is an emerging serious disease in the Americas, transmitted from wild rodents to humans through inhalation of aerosol containing virus. Herein, we characterized two distinct hantaviruses circulating in rodent species form Central Plateau, Midwestern region of Brazil in the Cerrado (savanna-like) biome, an area characterized by small trees and grasses adapted to climates with long dry periods. In this study, we identified the co-circulation of the Araraquara virus and a possible new lineage of the Juquitiba virus (JUQV) in Oligoryzomys nigripes. The implications of co-circulation are still unknown, but it can be the key for increasing viral diversity or emergence of new species through spillover or host switching events leading to co-infection and consequently recombination or reassortment between different virus species. Phylogenetic analyses based on the complete S segment indicated that, alongside with Oligoryzomys mattogrossae rodents, O. nigripes species could also have a whole as JUQV reservoir in the Cerrado biome. Although these rodents' species are common in the Cerrado biome, they are not abundant demonstrating how complex and different hantavirus enzootic cycles can be in this particular biome.
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Affiliation(s)
- Alexandro Guterres
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Pavilhão Helio e Peggy Pereira - 1° Pav. Sala B115, Av. Brasil 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brazil.
- Departamento de Genética, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Renata Carvalho de Oliveira
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Pavilhão Helio e Peggy Pereira - 1° Pav. Sala B115, Av. Brasil 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brazil
| | - Jorlan Fernandes
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Pavilhão Helio e Peggy Pereira - 1° Pav. Sala B115, Av. Brasil 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brazil
| | - Renata Malachini Maia
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Pavilhão Helio e Peggy Pereira - 1° Pav. Sala B115, Av. Brasil 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brazil
| | - Bernardo Rodrigues Teixeira
- Laboratorio de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | | | - Cibele Rodrigues Bonvicino
- Laboratorio de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
- Instituto Nacional do Câncer - INCA, Rio de Janeiro, RJ, Brazil
| | - Paulo Sergio D'Andrea
- Laboratorio de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Carlos Guerra Schrago
- Departamento de Genética, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Elba Regina Sampaio de Lemos
- Laboratório de Hantaviroses e Rickettsioses, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Pavilhão Helio e Peggy Pereira - 1° Pav. Sala B115, Av. Brasil 4365, Manguinhos, Rio de Janeiro, RJ, 21045-900, Brazil.
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Brito DQ, Passos CJS, Muniz DHF, Oliveira-Filho EC. Aquatic ecotoxicity of ashes from Brazilian savanna wildfires. Environ Sci Pollut Res Int 2017; 24:19671-19682. [PMID: 28681306 DOI: 10.1007/s11356-017-9578-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
In a global scenario of climate change, several studies have predicted an increase in fires in different parts of the world. With the occurrence of rains following the fires in the Brazilian savanna (Cerrado biome), the compounds present in ashes may enter aquatic environments and cause adverse effects to these ecosystems. In this context, this study evaluated the potential toxicity of ashes from two areas of Cerrado and an area of pasture, through ecotoxicological bioassays and using three aquatic species from distinct trophic levels, which were exposed to different dilutions of ashes: the microcrustacean Ceriodaphnia dubia, the fish Danio rerio and the mollusc Biomphalaria glabrata. The ashes from the three sampled areas showed higher concentrations of some elements in relation to the soil samples (B, Ca, K, Mg, Mn, P, S, Si, Sr, Zn), but only a small quantity of these compounds was solubilised. Our data showed that all ash samples caused acute toxicity to C. dubia (48hs-LC50 = 13.4 g L-1; 48hs-LC50 = 6.33 g L-1; 48hs-LC50 = 9.73 g L-1 respectively for transition area, pasture, typical cerrado areas), while in relation to D. rerio and B. glabrata, no acute toxicity was observed when they were exposed to ashes from native Cerrado vegetation and pasture areas. Ashes from a transition area showed toxicity for D. rerio (48hs-LC50 = 25.0 g L-1); possibly, this was due to the combination of multiple preponderant inorganic elements of ashes with other organic compounds not analysed, such as polycyclic aromatic hydrocarbons (PAHs). In summary, these results suggest that wildfires may pose risks to zooplankton communities and emphasize the need for more studies to better understand the complexity of the ecological effects of fire on aquatic ecosystems.
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Affiliation(s)
- Darlan Q Brito
- Embrapa Cerrados (Empresa Brasileira de Pesquisa Agropecuária), Road BR-020, km 18, Planaltina, Federal District (DF), 73310-970, Brazil
- University of Brasília, Faculty UnB at Planaltina (FUP), Planaltina, Federal District (DF), 73345-010, Brazil
| | - Carlos José S Passos
- University of Brasília, Faculty UnB at Planaltina (FUP), Planaltina, Federal District (DF), 73345-010, Brazil
| | - Daphne H F Muniz
- Embrapa Cerrados (Empresa Brasileira de Pesquisa Agropecuária), Road BR-020, km 18, Planaltina, Federal District (DF), 73310-970, Brazil
| | - Eduardo C Oliveira-Filho
- Embrapa Cerrados (Empresa Brasileira de Pesquisa Agropecuária), Road BR-020, km 18, Planaltina, Federal District (DF), 73310-970, Brazil.
- University of Brasília, Faculty UnB at Planaltina (FUP), Planaltina, Federal District (DF), 73345-010, Brazil.
- Centro Universitário de Brasília (UniCEUB), SEPN 707/907, Campus do UniCEUB, Asa Norte, Brasília (DF), 70790-075, Brazil.
- Embrapa Cerrados (Laboratory of Ecotoxicology), Planaltina, Distrito Federal, 73310-970, Brazil.
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