LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 31

Search options

  1. Article ; Online: Richness and composition of terrestrial mammals vary in eucalyptus plantations due to stand age

    de Abreu Pestana, Luís Fernando / Martello, Felipe / Fonseca, Renata Cristina Batista

    Austral Ecology. 2023 June, v. 48, no. 4 p.743-760

    2023  

    Abstract: Plantation forests substitute natural habitats and have rotation cycles of 7 years due to their high growth rates. This variation reflects on local and landscape changes, influencing habitat availability and affecting mammal communities. In this study, ... ...

    Abstract Plantation forests substitute natural habitats and have rotation cycles of 7 years due to their high growth rates. This variation reflects on local and landscape changes, influencing habitat availability and affecting mammal communities. In this study, our general hypothesis was that the richness and composition of mammals varied in eucalyptus plantations in relation to native forest patches and in relation to the age of eucalyptus plantations. We predicted that (1) there would be lower mammalian richness and compositional differences in eucalyptus plantations compared to native vegetation due to monocultures having simplified environmental characteristics and (2) predicted that the richness and composition would vary according to eucalyptus age and that the highest values of richness would be found in plantations of up to middle age, considering that in these phases there are environmental characteristics that positively qualify these structures for a greater presence of fauna, such as the shrubby aspect of the plantations and the presence of undergrowth. We performed model selection to observe the effect of environmental variables on mammalian richness. We also performed a multivariate permutational analysis of variance, a non‐metric multidimensional scaling and partitioned the beta diversity to observe how the composition was influenced by environmental variables. We found greater richness in the native vegetation compared to eucalyptus plantations. The richness of the plantations varied according to the age, with higher values up to middle age. The composition varied according to the land user/cover, with the eucalyptus age and with the management unit due to the nestedness of species. We suggest that eucalyptus plantations at early ages are more used by mammals due to the shrubby aspect of the stand, generating a positive visual effect for the search of resources and shelter, in addition to the possibility of the occurrence of grasses, some understory and lower anthropogenic disturbance.
    Keywords Eucalyptus ; analysis of variance ; anthropogenic activities ; fauna ; forests ; habitats ; indigenous species ; landscapes ; mammals ; nestedness ; species diversity ; stand age ; understory
    Language English
    Dates of publication 2023-06
    Size p. 743-760.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 2756933-0
    ISSN 2052-1758 ; 1442-9985
    ISSN (online) 2052-1758
    ISSN 1442-9985
    DOI 10.1111/aec.13297
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  2. Article: Edge contrast modulates ant community responses to edge distance in agricultural landscapes

    Martello, Felipe / Andriolli, Fernando Sarti / Medeiros, Hugo Reis / Barão, Thamilin / Ribeiro, Milton Cezar

    Agricultural and forest entomology. 2022 Aug., v. 24, no. 3

    2022  

    Abstract: Although edge influence has been studied extensively, there is no consensus on how insect communities respond to edge environments. Studies highlight the importance of an experimental design that considers samples in adjacent matrix and the distance from ...

    Abstract Although edge influence has been studied extensively, there is no consensus on how insect communities respond to edge environments. Studies highlight the importance of an experimental design that considers samples in adjacent matrix and the distance from the edge as a continuous factor. We sampled ants along edges composed by Cerrado vegetation and three types of crop matrix: sugarcane, eucalyptus and pasture. We assessed the response patterns of ant communities to edge contrast and distance using linear models. Ant richness increases linearly towards Cerrado core in edges composed by sugarcane, while it did not change along edges composed by eucalyptus. In both cases, ant composition on both sides of these edges tended to be highly different. In pasture, ant richness is higher than Cerrado, while the composition changes gradually along this edge, indicating that low contrast edges imply a smoother effect of edge influence on communities. Our results suggest that edge influence is dependent on the structural contrast between the habitats that compose the edges. We highlight the importance of the two‐sided approach on edge studies and the use of more than a single biodiversity dimension to provide an accurate picture of edge influence on insect communities.
    Keywords Eucalyptus ; biodiversity ; cerrado ; entomology ; experimental design ; forests ; insects ; pastures ; sugarcane
    Language English
    Dates of publication 2022-08
    Size p. 289-300.
    Publishing place Blackwell Publishing Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 1444210-3
    ISSN 1461-9563 ; 1461-9555
    ISSN (online) 1461-9563
    ISSN 1461-9555
    DOI 10.1111/afe.12492
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  3. Article ; Online: Estimating the diversity of tropical anurans in fragmented landscapes with acoustic monitoring: lessons from a sampling sufficiency perspective

    Anunciação, Paula Ribeiro / Sugai, Larissa Sayuri Moreira / Martello, Felipe / Carvalho, Luis Marcelo Tavares de / Ribeiro, Milton Cezar

    Biodivers Conserv. 2022 Oct., v. 31, no. 12 p.3055-3074

    2022  

    Abstract: Determining the distribution and abundance of populations is the first step toward assessing biodiversity conservation status. This step is based on field observations that are largely influenced by the sampling method employed. Autonomous Recording ... ...

    Abstract Determining the distribution and abundance of populations is the first step toward assessing biodiversity conservation status. This step is based on field observations that are largely influenced by the sampling method employed. Autonomous Recording Units (ARUs) are tools developed to improve species monitoring that employ acoustic communication. Although largely employed, the efforts required to achieve good diversity estimates with this technique are still unknown. We investigate the use of ARUs in estimating species richness of anuran assemblages in a tropical region, aiming to determine the sampling sufficiency of species richness at local and regional levels, analyze whether the asymptote point is related to forest cover, and investigate the influence of subsampling type over time on species richness estimates. We monitored amphibians in 14 streams embedded in landscapes representing a gradient from 20 to 70% native forest coverage. We detected a total of 14 species, with the regional sampling sufficiency of total species richness reached in 3448 min and influenced mainly by the terrestrial species’ presence. Forest coverage had no influence on the minimum audio processing time required to achieve local asymptote. The subsampling schemes (temporally stratified and randomly assigned) had similar efficiency when using 5 min/h or more sample efforts. Our findings indicate that passive acoustic monitoring can adequately represent local anuran richness, focusing especially on the arboreal guild. Sampling effort can be optimized, with a 5 min/h duty cycle being sufficient to recover detection of most species, saving up to 75% of the effort devoted to auditing the acoustic dataset.
    Keywords Anura ; bioacoustics ; biodiversity conservation ; conservation status ; data collection ; forests ; species richness ; tropics
    Language English
    Dates of publication 2022-10
    Size p. 3055-3074.
    Publishing place Springer Netherlands
    Document type Article ; Online
    ZDB-ID 2000787-5
    ISSN 1572-9710 ; 0960-3115
    ISSN (online) 1572-9710
    ISSN 0960-3115
    DOI 10.1007/s10531-022-02475-w
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article: Ant taxonomic and functional beta-diversity respond differently to changes in forest cover and spatial distance

    Martins, Ingrid Santos / Ortega, Jean Carlo Gonçalves / Guerra, Vinicius / Costa, Marília Maria Silva / Martello, Felipe / Schmidt, Fernando Augusto

    Basic and applied ecology. 2022 May, v. 60

    2022  

    Abstract: Habitat change affects both taxonomic and functional biodiversity, and beta-diversity is often used as a metric to describe these changes. Furthermore, spatially closer communities tend to have more similar species compositions (lower beta-diversity). ... ...

    Abstract Habitat change affects both taxonomic and functional biodiversity, and beta-diversity is often used as a metric to describe these changes. Furthermore, spatially closer communities tend to have more similar species compositions (lower beta-diversity). These changes in community composition can be revealed with taxonomic and functional aspects of diversity. We assessed the responses of ant taxonomic and functional beta-diversity to changes in forest cover and spatial distance. We expected that changes in taxonomic and functional beta-diversity along a forest cover gradient would be caused by the replacement of open-habitat ant species by forest-habitat ant species. We sampled ants within twelve landscapes with different forest cover percentages in the southwestern Amazon of Brazil. Both taxonomic and functional beta-diversity of pairwise samples (βBC) were partitioned into their turnover (βBₐₗ) and nestedness (βGᵣₐ) components. Increasing forest cover correlated with increases in taxonomic and functional βBC, however, βBₐₗ had a greater contribution to taxonomic βBC and βGᵣₐ to functional βBC. Taxonomic βBC and βBₐₗ and functional βBₐₗ increased with spatial distance. Forest-habitat species richness increased, and open-habitat species richness decreased with increasing forest cover, while the richness of habitat-use generalist species did not vary. The loss of environmental heterogeneity may be responsible for generalist species dominance and open-habitat species presence in less-forested landscapes. This leads to great taxonomic replacement, but a nestedness gradient of function. Better land use planning is needed to ensure biodiversity and ecosystem functions of forest habitats in human-modified landscapes.
    Keywords applied ecology ; community structure ; ecosystems ; forests ; nestedness ; species richness ; Amazonia ; Brazil
    Language English
    Dates of publication 2022-05
    Size p. 89-102.
    Publishing place Elsevier GmbH
    Document type Article
    ZDB-ID 2026806-3
    ISSN 1439-1791
    ISSN 1439-1791
    DOI 10.1016/j.baae.2022.02.008
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  5. Article: Occurrence and conservation of the Vulnerable titi monkey Callicebus melanochir in fragmented landscapes of the Atlantic Forest hotspot

    Costa-Araújo, Rodrigo / Luis Regolin, André / Martello, Felipe / Pedro Souza-Alves, João / Hrbek, Tomas / Cezar Ribeiro, Milton

    Oryx. 2021 Nov., v. 55, no. 6

    2021  

    Abstract: Tropical forest hotspots have a high diversity of species but have lost > 70% of their original vegetation cover and are characterized by a multitude of small and isolated fragments. Paradoxically, conservation actions in these areas are still mainly ... ...

    Abstract Tropical forest hotspots have a high diversity of species but have lost > 70% of their original vegetation cover and are characterized by a multitude of small and isolated fragments. Paradoxically, conservation actions in these areas are still mainly focused on protection of large tracts of forests, a strategy now infeasible because of the small area of forest remnants. Here we use the Vulnerable black-handed titi monkey Callicebus melanochir as a model to study the effects of habitat loss, fragmentation and degradation on arboreal mammals and to provide insights for science-driven conservation in fragmented landscapes in tropical forest hotspots. We surveyed 38 Atlantic Forest fragments in Bahia State, Brazil and assessed the effects of patch area, quality and visibility, and landscape connectivity on the occurrence of our model species. Patch area was the single best model explaining species occurrence. Nonetheless, patch quality and visibility, and landscape connectivity, positively affect occurrence. In addition to patch area, patch quality, patch visibility and landscape connectivity are useful for predicting the occurrence of arboreal mammals in the fragments of tropical forest hotspots. We encourage the assessment of habitat quality (based on remotely sensed vegetation indices) and habitat visibility (based on digital elevation models) to improve discoverability of arboreal mammal populations and selection of fragments for conservation purposes across fragmented landscapes of tropical forest hotspots. Large remnants of tropical forest hotspots are scarce and therefore we require baseline data to support conservation actions and management in small forest fragments.
    Keywords Callicebus ; Oryx ; habitat connectivity ; habitat destruction ; monkeys ; remote sensing ; species diversity ; tropical forests ; vegetation cover ; Brazil
    Language English
    Dates of publication 2021-11
    Size p. 916-923.
    Publishing place Cambridge University Press
    Document type Article
    ZDB-ID 417337-5
    ISSN 1365-3008 ; 0030-6053
    ISSN (online) 1365-3008
    ISSN 0030-6053
    DOI 10.1017/S0030605319001522
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  6. Article: Natural habitat cover and fragmentation per se influence orchid-bee species richness in agricultural landscapes in the Brazilian Cerrado

    de Sousa, Fernanda Gonçalves / dos Santos, Juliana Silveira / Martello, Felipe / Diniz, Milena Fiuza / Bergamini, Leonardo Lima / Ribeiro, Milton Cezar / Collevatti, Rosane Garcia / Silva, Daniel Paiva

    Apidologie. 2022 May, v. 53, no. 2

    2022  

    Abstract: Habitat loss and fragmentation in the human‐modified landscape affect bee assemblages by reducing the available natural resources. The life history features and adaptations of bees to environmental conditions affect how they perceive and interact with ... ...

    Abstract Habitat loss and fragmentation in the human‐modified landscape affect bee assemblages by reducing the available natural resources. The life history features and adaptations of bees to environmental conditions affect how they perceive and interact with landscape structure. Therefore, it is crucial to quantify the magnitude of the effects of the landscape structure on this group at multiscale. We address the relative contribution of landscape structure in explaining the abundance of orchid bees, richness, and diversity in landscapes of Brazilian Cerrado. We mapped the surrounding landscape around 18 focal patches and sampled male orchid bees attracted by chemical baits. We used VIF and generalized linear models (GLM) to evaluate the effects of landscape structure (composition and configuration) at different spatial scales. We sampled 658 euglossine bees from five genera and 12 species. The savanna cover, forest cover, and fragmentation per se (i.e., the number of patches) were the best predictors of the richness of euglossine bees. The abundance of bees was explained by the savanna cover. The increase in natural habitat area and the reduction in landscape fragmentation favoring the assemblages of orchid bees are supported by our results. Savanna cover also modulates the abundance of euglossine bees, confirming that the habitat amount is essential for maintaining the populations of these bees. Our results reinforce the importance of habitat loss and fragmentation effects on the richness, abundance, and composition of euglossine bees, particularly in the naturally heterogeneous landscapes.
    Keywords Apidae ; Orchidaceae ; bees ; cerrado ; forests ; habitat destruction ; habitat fragmentation ; habitats ; landscapes ; life history ; males ; savannas ; species richness
    Language English
    Dates of publication 2022-05
    Size p. 20.
    Publishing place Springer Paris
    Document type Article
    ZDB-ID 280429-3
    ISSN 1297-9678 ; 0044-8435 ; 0365-5407
    ISSN (online) 1297-9678
    ISSN 0044-8435 ; 0365-5407
    DOI 10.1007/s13592-022-00925-6
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article ; Online: Atmospheric mercury in forests: accumulation analysis in a gold mining area in the southern Amazon, Brazil.

    Casagrande, Gabriela Cristina Rabello / Dambros, Juliane / de Andrade, Ednaldo Antônio / Martello, Felipe / Sobral-Souza, Thadeu / Moreno, Maria Inês Cruzeiro / Battirola, Leandro Dênis / de Andrade, Ricardo Lopes Tortorela

    Environmental monitoring and assessment

    2023  Volume 195, Issue 4, Page(s) 477

    Abstract: The spatial distribution and dispersion of mercury (Hg) is associated with the structural conditions of the environment, primarily land use and vegetation cover. Man-made emissions of the metal from activities such as artisanal and small-scale gold ... ...

    Abstract The spatial distribution and dispersion of mercury (Hg) is associated with the structural conditions of the environment, primarily land use and vegetation cover. Man-made emissions of the metal from activities such as artisanal and small-scale gold mining (ASGM) can influence this distribution. Forest ecosystems are of particular importance as they constitute one of the most active environments in the biogeochemical cycle of Hg, and understanding these dynamics is essential to better understand its global cycle. In this study, we determined the content of Hg present in different forest strata (soil, leaf litter, herbaceous, underwood/bush, and arboreal), as well as the relationship between the presence of Hg and the landscape heterogeneity, percentage of gold mines, and ground slope. This study was carried out in tropical forest areas of the southern Brazilian Amazon. Accumulation and transport of Hg between forest strata was assessed in order to understand the influence of these forest environments on Hg accumulation in areas where ASGM occurs. We verified that there is a difference in Hg content between forest strata, indicating that atmospheric Hg is accumulated onto the arboreal stratum and transported vertically to strata below the canopy, i.e., underwood/bush and herbaceous, and subsequently accumulated in the leaf litter and transferred to the soil. Leaf litter was the stratum with the highest Hg content, characterized as a receptor for most of the Hg load from the upper strata in the forest. Therefore, it was confirmed that Hg accumulation dynamics are at play between the areas analyzed due to the proximity of ASGMs in the region. This indicates that the conservation of forest areas plays an important role in the process of atmospheric Hg deposition and accumulation, acting as a mercury sink in areas close to man-made emissions.
    MeSH term(s) Humans ; Mercury/analysis ; Brazil ; Ecosystem ; Gold/analysis ; Environmental Monitoring ; Forests ; Trees ; Plants ; Mining ; Soil/chemistry
    Chemical Substances Mercury (FXS1BY2PGL) ; Gold (7440-57-5) ; Soil
    Language English
    Publishing date 2023-03-17
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-11063-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Landscape structure shapes the diversity of plant reproductive traits in agricultural landscapes in the Brazilian Cerrado

    Martello, Felipe / dos Santos, Juliana Silveira / Silva-Neto, Carlos M. / Cássia-Silva, Cibele / Siqueira, Karoline Nascimento / Ataíde, Marcos Vinicius Rezende de / Ribeiro, Milton Cezar / Collevatti, Rosane Garcia

    Agriculture, Ecosystems and Environment. 2023 Jan., v. 341 p.108216-

    2023  

    Abstract: The replacement of native vegetation by crops and pasturelands compromises the functional diversity of plants and negatively influence ecosystem functions such as pollination and seed dispersal. Here, we investigate the effects of landscape structure on ... ...

    Abstract The replacement of native vegetation by crops and pasturelands compromises the functional diversity of plants and negatively influence ecosystem functions such as pollination and seed dispersal. Here, we investigate the effects of landscape structure on the diversity of functional traits in agricultural landscapes in the Brazilian Cerrado. We sampled the woody plant community in 49 sites in forests and savannas, and analyzed the density and richness of pollination and seed dispersal syndromes. We performed model selection using Akaike Information Criterion to test whether landscape variables such as habitat amount, percentage of agriculture and pasture, patch and edge densities, and compositional heterogeneity at different spatial scales influence the density and richness of woody plant functional traits related to seed dispersal and pollination syndromes. The amount of forest and patch density were the landscape predictors that explained most of the diversity of plant functional traits. The amount of agricultural and savanna as well as edge density and landscape heterogeneity also affected functional traits. Our results suggest that habitat amount and configuration in the landscapes drive the diversity of functional traits, pointing that maintaining habitats within Cerrado agricultural landscapes is determinant for the plant’s functional traits diversity. Furthermore, a heterogeneous mosaic may favor the density or richness of plants pollinated by insects and hummingbirds. The continuous loss and fragmentation of habitats may lead to loss of ecological functions compromising the provision of ecosystems services in agricultural landscapes in the Cerrado ecoregion.
    Keywords agriculture ; cerrado ; ecoregions ; ecosystems ; environment ; forests ; functional diversity ; habitats ; indigenous species ; landscapes ; pastures ; plant communities ; pollination ; savannas ; seed dispersal ; woody plants ; Agroecosystems ; Ecosystem function ; Plant reproductive traits ; Savanna ; Seasonally dry tropical forests
    Language English
    Dates of publication 2023-01
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 602345-9
    ISSN 1873-2305 ; 0167-8809
    ISSN (online) 1873-2305
    ISSN 0167-8809
    DOI 10.1016/j.agee.2022.108216
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Article ; Online: Integrating ecological niche and hydrological connectivity models to assess the impacts of hydropower plants on an endemic and imperilled freshwater turtle

    Regolin, André Luis / Bressan, Raíssa / Kunz, Tobias S. / Martello, Felipe / Ghizoni‐Jr, Ivo R. / Cherem, Jorge José / Capela, Danilo José Vieira / Oliveira‐Santos, Luiz Gustavo R. / Collevatti, Rosane Garcia / Sobral‐Souza, Thadeu

    Journal of Applied Ecology. 2023 Aug., v. 60, no. 8 p.1734-1748

    2023  

    Abstract: Hydropower is the main renewable energy source around the globe; however, cumulative impacts of hydropower plants (HPPs) come with vast environmental concerns. As freshwater species are susceptible to hydrodam‐induced environmental modifications, an ... ...

    Abstract Hydropower is the main renewable energy source around the globe; however, cumulative impacts of hydropower plants (HPPs) come with vast environmental concerns. As freshwater species are susceptible to hydrodam‐induced environmental modifications, an understanding of how HPPs change species distribution is required to predict and mitigate the impacts of the expansion of hydroelectric matrices generation, securing energy provision and biodiversity conservation. We assessed the impacts of HPPs on the distribution of an endemic and imperilled freshwater turtle with very unique ecological requirements, the Williams' side‐necked turtle Phrynops williamsi. To prevent and mitigate impacts, we prioritized sites for species conservation by classifying planned HPP locations according to their predicted adverse effects on species distribution. We built ecological niche models to estimate the distribution of the species. Then, we contrasted the species distribution with current and planned HPPs in Brazil to (i) verify whether HPPs locations coincide with high suitability areas; (ii) assess the difference in the magnitude of impacts on species caused by HPPs regarding their licensing stage and type; and (iii) identify priority areas for species conservation over the sites where new HPPs are planned based on an integrative analysis of ecological niche and hydrological connectivity models. Finally, we assessed the risk of species extinction at multiple levels according to IUCN criteria. HPPs overlap areas of high suitability for the species, independently of type or licensing stage. Differences in adverse impacts among HPP types were determined by the affected area and the degree of disruption in connectivity. In the future, the area impacted by small HPPs will nearly equal those of large HPPs, which currently have the highest impacts on species. The conservation status of the species partially corroborated previous assessments and suggested that its extinction risk was underestimated at some levels. Synthesis and applications. Our modelling approach highlights potential conflicts between hydropower generation and species conservation. This analysis can be a complementary tool to drive decisions on the ecological sustainability of HPPs; it can reveal the patterns of cumulative impacts of HPPs on riverine species and freshwater ecosystems, informing the planning of sustainable energy provision.
    Keywords applied ecology ; biodiversity conservation ; conservation status ; energy ; environmental sustainability ; extinction ; freshwater ; geographical distribution ; niches ; riparian areas ; risk ; turtles ; water power ; Brazil
    Language English
    Dates of publication 2023-08
    Size p. 1734-1748.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 410405-5
    ISSN 1365-2664 ; 0021-8901
    ISSN (online) 1365-2664
    ISSN 0021-8901
    DOI 10.1111/1365-2664.14436
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article ; Online: Atmospheric mercury in forests: accumulation analysis in a gold mining area in the southern Amazon, Brazil

    Casagrande, Gabriela Cristina Rabello / Dambros, Juliane / de Andrade, Ednaldo Antônio / Martello, Felipe / Sobral-Souza, Thadeu / Moreno, Maria Inês Cruzeiro / Battirola, Leandro Dênis / de Andrade, Ricardo Lopes Tortorela

    Environ Monit Assess. 2023 Apr., v. 195, no. 4 p.477-477

    2023  

    Abstract: The spatial distribution and dispersion of mercury (Hg) is associated with the structural conditions of the environment, primarily land use and vegetation cover. Man-made emissions of the metal from activities such as artisanal and small-scale gold ... ...

    Abstract The spatial distribution and dispersion of mercury (Hg) is associated with the structural conditions of the environment, primarily land use and vegetation cover. Man-made emissions of the metal from activities such as artisanal and small-scale gold mining (ASGM) can influence this distribution. Forest ecosystems are of particular importance as they constitute one of the most active environments in the biogeochemical cycle of Hg, and understanding these dynamics is essential to better understand its global cycle. In this study, we determined the content of Hg present in different forest strata (soil, leaf litter, herbaceous, underwood/bush, and arboreal), as well as the relationship between the presence of Hg and the landscape heterogeneity, percentage of gold mines, and ground slope. This study was carried out in tropical forest areas of the southern Brazilian Amazon. Accumulation and transport of Hg between forest strata was assessed in order to understand the influence of these forest environments on Hg accumulation in areas where ASGM occurs. We verified that there is a difference in Hg content between forest strata, indicating that atmospheric Hg is accumulated onto the arboreal stratum and transported vertically to strata below the canopy, i.e., underwood/bush and herbaceous, and subsequently accumulated in the leaf litter and transferred to the soil. Leaf litter was the stratum with the highest Hg content, characterized as a receptor for most of the Hg load from the upper strata in the forest. Therefore, it was confirmed that Hg accumulation dynamics are at play between the areas analyzed due to the proximity of ASGMs in the region. This indicates that the conservation of forest areas plays an important role in the process of atmospheric Hg deposition and accumulation, acting as a mercury sink in areas close to man-made emissions.
    Keywords biogeochemical cycles ; canopy ; gold ; land use ; landscapes ; mercury ; plant litter ; traditional technology ; tropical forests ; understory ; vegetation cover ; Amazonia ; Brazil
    Language English
    Dates of publication 2023-04
    Size p. 477.
    Publishing place Springer International Publishing
    Document type Article ; Online
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-11063-6
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top