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Article ; Online: Sediment Mercury, Geomorphology and Land Use in the Middle Araguaia River Floodplain (Savanna Biome, Brazil)

Lilian Moraes / José Vicente Elias Bernardi / João Pedro Rudrigues de Souza / Joelma Ferreira Portela / Ludgero Cardoso Galli Vieira / Carlos José Sousa Passos / Jurandir Rodrigues de Souza / Wanderley Rodrigues Bastos / Lucas Cabrera Monteiro / Ygor Oliveira Sarmento Rodrigues / José Garrofe Dorea

Soil Systems, Vol 7, Iss 4, p

2023 Volume 97

Abstract: In order to assess the influencing factors of the presence of mercury in a river within the Savanna biome (Cerrado), we surveyed total mercury (THg) in bottom sediment from 50 lakes along 750 km of the Middle Araguaia floodplain. The sampling sites ... ...

Abstract	In order to assess the influencing factors of the presence of mercury in a river within the Savanna biome (Cerrado), we surveyed total mercury (THg) in bottom sediment from 50 lakes along 750 km of the Middle Araguaia floodplain. The sampling sites included non-urban and urban surroundings over three distinct geomorphologies. We measured water physicochemical parameters at each site and tested statistically if land use nested within the geological formation influenced the THg concentration in bottom sediments and related water parameters. Multivariate results indicate that the interaction between geological groups and land use is statistically significant ( p < 0.05). Nested ANOVA and Tukey HSD tests confirmed that the geological formation with its nested land use influences the THg, pH, DO, conductivity, and TDS ( p < 0.05). THg was significantly lower in Quaternary terrains ( p < 0.05) and differed significantly between non-urban and urban areas in Neoproterozoic terrains ( p = 0.02). The spatial projections of the THg eigenvector on the main axes with the scoring factors of the Neoproterozoic/Paleoproterozoic terrains, and urban/non-urban, confirmed the spatial correlations. These results indicate that the association of land use and geology could be the main driver of THg in the bottom sediments of lakes from the Middle Araguaia floodplain.
Keywords	geology ; urbanization ; nested ; Cerrado ; Hg ; aquatic environment ; Physical geography ; GB3-5030 ; Chemistry ; QD1-999
Subject code	550 ; 910
Language	English
Publishing date	2023-10-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A TYPOLOGY PROPOSAL FOR THE ECONOMIC ORGANIZATIONS OF BRAZIL'S FAMILY AGRICULTURE

Luiz Honorato da Silva Junior / Fernanda Regina Nascimento / Mário Lúcio de Ávila / Ludgero Cardoso Galli Vieira

Economia & Região, Vol 8, Iss 1, Pp 147-

2020 Volume 161

Abstract: The objective of this paper is to propose a typology for the Economic Organizations of Family Agriculture (OEAFs) in Brazil. From the SIES database a Multiple Factor Analysis was proposed to find the possible types of OEAFs. Four Types were determined. ... ...

Abstract	The objective of this paper is to propose a typology for the Economic Organizations of Family Agriculture (OEAFs) in Brazil. From the SIES database a Multiple Factor Analysis was proposed to find the possible types of OEAFs. Four Types were determined. Subsequently, logistic regressions were made in order to verify which socioeconomic and regional characteristics were most related to each of the four types found. The results suggest that Type 1 are OEAFs from family farming, from rural areas, from less complex managerial organization and from poorer regions of Brazil. Type 2 includes younger OEAFs, composed of cooperatives as well as less developed regions of the country. Type 3 is characterized by cooperatives, Enterprises from Agrarian Reform, and the northern region of the country. And, finally, Type 4 is marked by even younger OEAFs, Business Agriculture, non-rural activities and located in the most dynamic regions of the country.
Keywords	typology ; economic organizations ; family agriculture ; brazil ; Economic growth ; development ; planning ; HD72-88 ; Economics as a science ; HB71-74
Language	Portuguese
Publishing date	2020-02-01T00:00:00Z
Publisher	Universidade Estadual de Londrina
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Two practical approaches to monitoring the zooplanktonic community at Lago Grande do Curuai, Pará, Brazil

Leonardo Fernandes GOMES / Ludgero Cardoso Galli VIEIRA / Marie Paule BONNET

Acta Amazonica, Vol 45, Iss 3, Pp 293-

2015 Volume 298

Abstract: The use of substitute groups in biomonitoring programs has been proposed to minimize the high financial costs and time for samples processing. The objectives of this study were to evaluate the correlation between (i) the spatial distribution among the ... ...

Abstract	The use of substitute groups in biomonitoring programs has been proposed to minimize the high financial costs and time for samples processing. The objectives of this study were to evaluate the correlation between (i) the spatial distribution among the major zooplankton groups (cladocerans, copepods, rotifers, and testaceans protozoa), (ii) the data of density and presence/absence of species, and (iii) the data of species, genera, and families from samples collected in the Lago Grande do Curuai, Pará, Brazil. A total of 55 sample of the zooplanktonic community was collected, with 28 samples obtained in March and 27 in September, 2013. The agreement between the different sets of data was assessed using Mantel and Procrustes tests. Our results indicated high correlations between genus level and species level and high correlations between presence/absence of species and abundance, regardless of the seasonal period. These results suggest that zooplankton community could be incorporated in a long-term monitoring program at relatively low financial and time costs.
Keywords	Biomonitoring ; Cladoceran ; Copepod ; Rotifer ; Testate amoebae ; Science (General) ; Q1-390
Subject code	590
Language	English
Publishing date	2015-09-01T00:00:00Z
Publisher	Instituto Nacional de Pesquisas da Amazônia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Shortcuts for biomonitoring programs of stream ecosystems

Ruan Carlos Pires Faquim / Karine Borges Machado / Fabrício Barreto Teresa / Pedro Henrique Francisco de Oliveira / Gustavo Fernandes Granjeiro / Ludgero Cardoso Galli Vieira / João Carlos Nabout

PLoS ONE, Vol 16, Iss 10, p e

Evaluating the taxonomic, numeric, and cross-taxa congruence in phytoplankton, periphyton, zooplankton, and fish assemblages.

2021 Volume 0258342

Abstract: Different biological groups can be used for monitoring aquatic ecosystems because they can respond to variations in the environment. However, the evaluation of different bioindicators may demand multiple financial resources and time, especially when ... ...

Abstract	Different biological groups can be used for monitoring aquatic ecosystems because they can respond to variations in the environment. However, the evaluation of different bioindicators may demand multiple financial resources and time, especially when abundance quantification and species-level identification are required. In this study, we evaluated whether taxonomic, numerical resolution and cross-taxa can be used to optimize costs and time for stream biomonitoring in Central Brazil (Cerrado biome). For this, we sampled different biological groups (fish, zooplankton, phytoplankton, and periphyton) in stream stretches distributed in a gradient of land conversion dominated by agriculture and livestock. We used the Mantel and Procrustes analyses to test the association among different taxonomic levels (species to class), the association between incidence and abundance data (numerical resolution), and biological groups. We also assessed the relative effect of local environmental and spatial predictors on different groups. The taxonomic levels and numerical resolutions were strongly correlated in all taxonomic groups (r > 0.70). We found no correlations among biological groups. Different sets of environmental variables were the most important to explain the variability in species composition of distinct biological groups. Thus, we conclude that monitoring the streams in this region using bioindicators is more informative through higher taxonomic levels with occurrence data than abundance. However, different biological groups provide complementary information, reinforcing the need for a multi-taxa approach in biomonitoring.
Keywords	Medicine ; R ; Science ; Q
Subject code	333
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Spatial synchrony of zooplankton during the impoundment of amazonic reservoir

Carvalho Vieira, Maisa / Iris Roitman / Hugo de Oliveira Barbosa / Luiz Felipe Machado Velho / Ludgero Cardoso Galli Vieira

Ecological indicators. 2019 Mar., v. 98

2019

Abstract: The escalating demand for energy and the strong political and economic pressure to explore the Amazon’s hydroelectric potential has led to the increase of hydroelectric reservoirs in the region. Reservoirs are artificial ecosystems that modify the ... ...

Abstract	The escalating demand for energy and the strong political and economic pressure to explore the Amazon’s hydroelectric potential has led to the increase of hydroelectric reservoirs in the region. Reservoirs are artificial ecosystems that modify the structure of biological populations. Evaluating the spatial synchrony of populations and environmental variables in the development of reservoirs may reveal determinant factors and processes operating in these ecosystems. This may help understand the impacts, optimize monitoring systems and develop strategies to improve and maintain the ecological integrity (or stability) of these environments. In this study, we evaluated the spatial synchrony in zooplankton populations and limnological environmental variables during the implementation of a hydroelectric reservoir in the Amazon region, on the border of the states of Pará and Amapá. Synchrony was determined by mean cross-correlation between the pairs of points for each variable, followed by Mantel test to investigate its influencing factors. We observed spatial synchronous values for both population and limnological environmental variables. However, we could not identify the mechanisms that are operating, indicating that more than one factor may be influencing the ecosystem dynamics. Population synchrony increased after impoundment. Population synchrony may be associated with some limnological variables, such as the ones related to the amounts of nutrients, whereas environmental synchrony can be related to extrinsic factors, such as climatic variation, not tested this study. In order to increase the understanding of the mechanisms operating over population and environmental dynamics, we suggest that, besides evaluating limnological environmental variables and spatial synchrony, analyses should include meteorological and landscape data.
Keywords	ecosystems ; energy ; environmental factors ; environmental indicators ; landscapes ; monitoring ; nutrients ; politics ; zooplankton ; Amazonia
Language	English
Dates of publication	2019-03
Size	p. 649-656.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2036774-0
ISSN	1872-7034 ; 1470-160X
ISSN (online)	1872-7034
ISSN	1470-160X
DOI	10.1016/j.ecolind.2018.11.040
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Alternatives for the biomonitoring of fish and phytoplankton in tropical streams

Hugo de Oliveira Barbosa / Karine Borges Machado / Maisa Carvalho Vieira / Hasley Rodrigo Pereira / Leonardo Fernandes Gomes / João Carlos Nabout / Fabrício Barreto Teresa / Ludgero Cardoso Galli Vieira

Neotropical Biology and Conservation, Vol 14, Iss 4, Pp 361-

2019 Volume 380

Abstract: Biomonitoring programs need to balance accurate responses in assessments of changes in biological communities with sampling that is fast and low cost. In this study, we evaluated the concordance among fish and phytoplankton communities of streams. We ... ...

Abstract	Biomonitoring programs need to balance accurate responses in assessments of changes in biological communities with sampling that is fast and low cost. In this study, we evaluated the concordance among fish and phytoplankton communities of streams. We tested the cross-taxa surrogacy, taxonomic, numerical resolution and ecological substitute group (habitat use and trophic guilds) resolution with Procrustes analyses aim of simplifying the biomonitoring process. We collect a total fish abundance of 8,461 individuals, represented by the ecological classes of habitat, including benthic, nektonic, nektobenthic, marginal and trophic guilds by detritivore, terrestrial invertivore, aquatic invertivore, piscivore, algivore and herbivore. We sampled a phytoplankton total density of 1,466.68 individuals/ml, represented by four Morphology-Based Functional Groups and nine Reynolds Functional Groups. Our results don’t support the use of substitute groups among fish and phytoplankton. For fish, habitat use and trophic guild are good surrogates for species-level data. Additionally, our results don’t support the use of functional groups as surrogates for phytoplankton. We suggest the use of higher taxonomic levels (genus and family) and record only the occurrence of species and/or genus for fish and phytoplankton. Our findings contribute to decreasing the costs and time of biomonitoring programs assessments and/or conservation plans on fish and phytoplankton communities of headwater streams.
Keywords	Biology (General) ; QH301-705.5
Subject code	333
Language	English
Publishing date	2019-11-01T00:00:00Z
Publisher	Pensoft Publishers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Unraveling Flooding Dynamics and Nutrients’ Controls upon Phytoplankton Functional Dynamics in Amazonian Floodplain Lakes

Cleber Nunes Kraus / Marie-Paule Bonnet / Ina de Souza Nogueira / Maria Tereza Morais Pereira Souza Lobo / David da Motta Marques / Jérémie Garnier / Ludgero Cardoso Galli Vieira

Water, Vol 11, Iss 1, p

2019 Volume 154

Abstract: The processes in tropical floodplain lakes enable maintaining phytoplankton nutrient requirements over a hydrological year. The nutrients such as nitrogen, phosphorus and carbon compounds play an essential role in phytoplankton growth. However, the way ... ...

Abstract	The processes in tropical floodplain lakes enable maintaining phytoplankton nutrient requirements over a hydrological year. The nutrients such as nitrogen, phosphorus and carbon compounds play an essential role in phytoplankton growth. However, the way that nutrients and phytoplankton interact and how this relationship varies seasonally in tropical freshwater ecosystems is not clear. In this study, we evaluate the relationship between phytoplankton–nutrients over the hydrological cycle in Amazonian floodplain lakes and verify if this relationship influences the biomass of cyanobacteria. We also check what factors linked to nutrients act in structuring phytoplankton community. Using the phytoplankton functional approach, we verified how their ability to respond to hydrological and environmental variations reflects the ecological conditions and investigated how these interactions work. The results show that the Amazonian floodplain lakes could maintain long-term nutrient enrichment status. The nutrients input conduces to cyanobacteria dominance, that allied to other factors, play an essential role in supporting the stability of the phytoplankton–nutrients relationship over the hydrological cycle.
Keywords	nutrient enrichment ; floodplain dynamics ; phytoplankton ecology ; hydrological process ; Hydraulic engineering ; TC1-978 ; Water supply for domestic and industrial purposes ; TD201-500
Subject code	551
Language	English
Publishing date	2019-01-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Dinâmica da cobertura da terra e carbono em 55 assentamentos na Amazônia Legal entre 2008 e 2016

Iris Roitman / Rômulo José da Costa Ribeiro / Tamiel Khan Baiocchi Jacobson / Luciana Silva Estevam / Nívea Jorgia Silva Marcondes / Reinaldo José de Miranda Filho / Ludgero Cardoso Galli Vieira / Sílvia Starling Assad / Mário Lúcio Ávila

Confins, Vol

implicações para políticas de mudanças climáticas

2020 Volume 46

Abstract: In this study, we described the dynamics of land-cover and gross carbon stocks and emissions (C) in 55 settlements in Legal Amazon, located in northern Mato Grosso state, between 2008 and 2016 and discussed their implications for climate change policies. ...

Abstract	In this study, we described the dynamics of land-cover and gross carbon stocks and emissions (C) in 55 settlements in Legal Amazon, located in northern Mato Grosso state, between 2008 and 2016 and discussed their implications for climate change policies. C estimates were based on land-cover changes, obtained with Spot, Sentinel and Landsat image processing and field visits, and secondary data of mean carbon values per vegetation class. The 55 settlements were originally covered by 685,000 ha of native vegetation (103 Tg C). Deforestation by 2016 was over 65%. Most of it (77%) occurred by 2008. Although restoration of consolidated areas (areas deforested before July 2008) is not mandatory, it can generate revenue from carbon credits, environmental reserve quotas, forest management and agroforestry. The deforested area per settlement by 2008 was strongly related to the deforestation per settlement between 2008 and 2016. This suggests that those who deforested a lot until 2008 tend to continue to do so until 2016. The annual deforestation rate between 2008 and 2016 was 12.7 thousand ha /year. If it remains the same, all native vegetation will have been suppressed in less than two decades. In general, the Sustainable-Development-Project settlements had less deforestation, which indicates that it is possible to associate agrarian reform and economic and social development with the conservation of the Amazon rainforest. However, it is necessary to strengthen policies toward payment for ecosystem services and forest management products (low-impact forest management and non-timber forest products). In order to do so, the integration of federal, state and local governments and market efforts is paramount.
Keywords	Amazon ; land use ; agrarian reform ; environmental regularization ; Geography. Anthropology. Recreation ; G
Subject code	333
Language	English
Publishing date	2020-06-01T00:00:00Z
Publisher	Confins
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Use of phytoplankton functional groups as a model of spatial and temporal patterns in reservoirs: a case study in a reservoir of central Brazil

Rodrigues, Luzia Cleide / Bianca Mathias Pivato / Ludgero Cardoso Galli Vieira / VÃ¢nia Mara Bovo-Scomparin / Jascieli Carla Bortolini / Alfonso Pineda / Sueli Train

Hydrobiologia. 2018 Jan., v. 805, no. 1

2018

Abstract: We analyzed the temporal (dry and rainy periods) and spatial (zones) phytoplankton biomass variation (FGsâfunctional groups) in a tropical reservoir, and determined the main drivers. We hypothesized that water flow negatively affects the FGâ ... ...

Abstract	We analyzed the temporal (dry and rainy periods) and spatial (zones) phytoplankton biomass variation (FGsâfunctional groups) in a tropical reservoir, and determined the main drivers. We hypothesized that water flow negatively affects the FGâenvironment relationship because high flow promotes dispersal stochasticity. Our results indicated that the FGâenvironment relationship was affected mainly by the rainfall regime. Periods with intermediate precipitation showed greater predictability than periods with extreme precipitation. This suggests that the effect of stochastic processes on the phytoplankton community is more important in both the highest and lowest water flow, and deterministic processes are more important at intermediate flow. The longitudinal gradient of nutrients, light, and water-column mixing influenced the distribution of the FG biomass. The riverine zone showed high nutrient concentrations, low light availability, and a high biomass of organisms related to highly enriched systems (FG Jâchlorophyceans) and shade-adapted taxa (FG S1âcyanobacteria). The lacustrine zone showed high light availability and a high biomass of heterocytous cyanobacteria (FGs S N and H1) and meroplanktonic diatoms (FG MP). The functional approach can be applied to understand the processes responsible for species coexistence and for the organization of aquatic ecosystems.
Keywords	Bacillariophyceae ; Cyanobacteria ; aquatic ecosystems ; biomass ; case studies ; intermediate flow ; mixing ; models ; moieties ; nutrient content ; nutrients ; phytoplankton ; rain ; stochastic processes ; water flow ; wet season ; Brazil
Language	English
Dates of publication	2018-01
Size	p. 147-161.
Publishing place	Springer International Publishing
Document type	Article
ZDB-ID	214428-1
ISSN	1573-5117 ; 0018-8158
ISSN (online)	1573-5117
ISSN	0018-8158
DOI	10.1007/s10750-017-3289-x
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Comparison of two artificial diets to rear Elaphria agrotina

Pollyanna Nunes de Otanásio / Ludgero Cardoso Galli Vieira / Vânia Ferreira Roque-Specht / Silvana Vieira de Paula-Moraes / Priscila Maria Colombo da Luz / Alexandre Specht

Ciência Rural, Vol 48, Iss

2018 Volume 5

Abstract: ABSTRACT: Given the increasing importance of Elaphria agrotina (Guenée) (Lepidoptera: Noctuidae) in corn crops, especially in the Brazilian Savannah biome, the present research aimed to study its development and survival on Greene’s and Poitout & Bues’s ... ...

Abstract	ABSTRACT: Given the increasing importance of Elaphria agrotina (Guenée) (Lepidoptera: Noctuidae) in corn crops, especially in the Brazilian Savannah biome, the present research aimed to study its development and survival on Greene’s and Poitout & Bues’s artificial diets (25±1°C, 70±10% relative humidity [RH] and 12h photophase). Poitout & Bues’s diet was more suitable than Greene’s diet, providing higher survival percent (77.51% vs. 5.57%), lower development time (49.81 days vs. 55.24 days) and higher fecundity (167.65 vs. 84.9 eggs), respectively. All the caterpillars reared on Poitout & Bues’s diet passed through six instars, while almost half of the larvae reared on Greene’s diet went through one less instar stage. Regarding the main reproductive parameters, higher average time of generation (T) and lower values of net rates of reproduction (Ro), and increased (rm) intrinsic and finite reason of increase (λ), were observed for larvae reared on Greene’s diet. Results presented in this study indicated that Poitout & Bues’s diet is more suitable for maintenance of colonies of E. agrotina as compared to Greene’s diet.
Keywords	culturas anuais ; adequação ; biologia ; lepidópteros-praga ; manutenção de colônias de insetos ; Agriculture ; S ; Agriculture (General) ; S1-972
Subject code	590
Language	English
Publishing date	2018-05-01T00:00:00Z
Publisher	Universidade Federal de Santa Maria
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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