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  1. Article ; Online: Flooding affects plant–plant interactions in tree seedlings from fertile Amazonian floodplains, Brazil

    da Silva, Naara Ferreira / Parolin, Pia / Piedade, Maria Teresa Fernandez / Lopes, Aline

    Hydrobiologia. 2023 Mar., v. 850, no. 6 p.1303-1317

    2023  

    Abstract: Several hypotheses try to explain the factors that limit the distribution of tree species in wetlands. Among them, the stress-gradient hypothesis states that interspecific ecological interactions (facilitation and competition) vary inversely across ... ...

    Abstract Several hypotheses try to explain the factors that limit the distribution of tree species in wetlands. Among them, the stress-gradient hypothesis states that interspecific ecological interactions (facilitation and competition) vary inversely across abiotic stress gradients, with facilitation being more common under conditions of high abiotic stress than under more benign conditions. We investigated the effects of ecological interactions on the biomass of two native tree species, Crateva tapia (highly flood-tolerant) and Hura crepitans (low flood tolerant) exposed to different experimental flooding conditions in a greenhouse. Individual and paired plants were submitted for 120 days to four treatments: (1) non-flooding and non-ecological interaction; (2) flooding and non-ecological interaction; (3) non-flooding and ecological interaction; (4): flooded and ecological interaction. Flooding reduced biomass allocation in H. crepitans. C. tapia biomass was reduced by interspecific interaction with H. crepitans. Flood and interspecific ecological interactions together facilitated the accumulation of biomass in H. crepitans. Our results support the stress-gradient hypothesis, showing that in a flooded environment, the species with low tolerance to flooding (H. crepitans) is favored by the presence of other species. Additional tests with other species can confirm whether this is a pattern that helps explain the establishment of tree species in wetlands.
    Keywords Crateva tapia ; Hura crepitans ; abiotic stress ; biomass ; dry matter partitioning ; ecological competition ; flooding tolerance ; greenhouses ; trees ; Brazil
    Language English
    Dates of publication 2023-03
    Size p. 1303-1317.
    Publishing place Springer International Publishing
    Document type Article ; Online
    ZDB-ID 214428-1
    ISSN 1573-5117 ; 0018-8158
    ISSN (online) 1573-5117
    ISSN 0018-8158
    DOI 10.1007/s10750-022-04985-8
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  2. Article ; Online: Evaluation of the management potential of timber resources in clearwater floodplain forests in the Amazon using growth models.

    Conde, Maíra Luciana Guimarães / Piedade, Maria Teresa Fernandez / Wittmann, Florian / Nascimento, Rodrigo Geroni Mendes / Schöngart, Jochen

    Journal of environmental management

    2023  Volume 351, Page(s) 119781

    Abstract: The Amazonian clearwater igapós are poorly studied floodplain ecosystems that are mainly covered by forests and are undergoing massive threats due to changes in land use and climate. Their hydrochemical characteristics and edaphic conditions fall between ...

    Abstract The Amazonian clearwater igapós are poorly studied floodplain ecosystems that are mainly covered by forests and are undergoing massive threats due to changes in land use and climate. Their hydrochemical characteristics and edaphic conditions fall between those of the eutrophic várzea floodplains on whitewater rivers and those of the oligotrophic igapós on blackwater rivers. Previous studies have indicated the management potential of timber species in the highly dynamic várzea floodplains due to the fast tree growth and high forest productivity. Timber resource management, however, is not recommended for the blackwater ecosystem because of its slow dynamics and high vulnerability to disturbances. For clearwater igapós, information on the potential for sustainable management of timber resources is lacking. In this study, we modeled the growth in diameter, height, and volume to derive species-specific minimum logging diameters (MLD) and felling cycles (FC) for eight merchantable species in the clearwater igapós of the Branco and Tapajós rivers in the northern and southern Amazon Basin, respectively. Diameter growth was modeled by analyzing the tree rings that are annually formed in the Amazonian floodplains as a consequence of the regular and predicable long-term flooding. Growth modeling followed the guidelines of the Growth-Oriented Logging (GOL) concept, with the adjustment of diameter growth improved by applying nonlinear mixed-effects regression. MLDs varied from 36 to 90 cm and FCs ranged from 6 to 21 years, which diverges from the standards of Brazilian logging regulations (MLD: 50 cm; FC: 25-35 years). This indicates the potential for timber resource management, which should be tested and introduced at small scales, integrated in protected areas to stepwise promote the sustainable management of these natural resources by traditional communities to increase their income and the conservation of this ecosystem.
    MeSH term(s) Ecosystem ; Conservation of Natural Resources ; Forests ; Floods ; Species Specificity
    Language English
    Publishing date 2023-12-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.119781
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  3. Article ; Online: New records and range extension of a Brazilian Amazon white-sand endemic species: Roraimaea aurantiaca Struwe, S.Nilsson & V.A.Albert (Gentianaceae)

    Demarchi, Layon Oreste / Struwe, Lena / Ferreira, Maria Julia / Schöngart, Jochen / Wittmann, Florian / Piedade, Maria Teresa Fernandez

    Check List. 2023 Aug. 22, v. 19, no. 4 p.573-580

    2023  

    Abstract: Roraimaea aurantiaca Struwe, S.Nilsson & V.A.Albert, a white-sand endemic species, was previously known from only two specimens collected in Roraima state, Brazil. Our new field collections and re-identified herbarium specimens expand this species’ ... ...

    Abstract Roraimaea aurantiaca Struwe, S.Nilsson & V.A.Albert, a white-sand endemic species, was previously known from only two specimens collected in Roraima state, Brazil. Our new field collections and re-identified herbarium specimens expand this species’ distribution and include the first records from the Brazilian state of Amazonas. Based on this effort, we present a distribution map, preliminary conservation status of Endangered, the first photographs of living plants, and an updated morphological description. This study aggregates new information on the flora of the northern Amazon Basin, in addition to discussing conservation of R. aurantiaca.
    Keywords Gentianaceae ; basins ; conservation status ; flora ; herbaria ; indigenous species ; Amazonia ; Brazil
    Language English
    Dates of publication 2023-0822
    Size p. 573-580.
    Publishing place Pensoft Publishers
    Document type Article ; Online
    ZDB-ID 2252867-2
    ISSN 1809-127X
    ISSN 1809-127X
    DOI 10.15560/19.4.573
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  4. Article: Does the consumption of pioneer-tree seeds from flooded forests by freshwater sardines affect seed germination?

    Albuquerque, Bianca Weiss / Costa, Gilvan / Correa, Sandra Bibiana / Zuanon, Jansen / Piedade, Maria Teresa Fernandez

    Acta oecologica. 2022 July 29,

    2022  

    Abstract: To understand the ecological relevance of fish-forest interactions, we sampled fish for a period of 8 months in a lowland forest of the Brazilian Amazon and evaluated the germination of intact seeds recovered from the intestine of three species of ... ...

    Abstract To understand the ecological relevance of fish-forest interactions, we sampled fish for a period of 8 months in a lowland forest of the Brazilian Amazon and evaluated the germination of intact seeds recovered from the intestine of three species of congeneric and sympatric freshwater sardines, Triportheus albus, T. angulatus and T. auritus. The number of seeds consumed by the three fish species and the possible effect of individual fish size on seed germination were investigated. We captured 150 individual sardines, of which N = 59, contained 982 intact seeds from seven flooded forest tree species. All the seeds were already pulped due to the digestive process and were sown to check its germination rates. We selected two pioneer tree species, Cecropia latiloba and Laetia corymbulosa, which were the two most consumed seeds to analyze the effects of its passage through the fishes’ digestory tracts on seed germination rates and speed, compared to intact seeds directly collected from trees (control). Seeds harvested from the wild were do not scarified or scrapep to remove the pulp because of the large amount of minute seeds of the two pioneer tree species. Fish body size did not affect the probability of germination of the consumed seeds of C. latiloba or L. corymbulosa. For both plant species, there was a reduction in the probability of germination of seeds taken from the intestine of fish in relation to control seeds collected in nature. Control seeds also germinated faster than those consumed by fish. Despite the seemingly negative effects on germination rates and speed after passing through the digestory tracts of the freshwater sardines, the fishes' ability to transport seeds away from the parent plants can compensate for the loss of viability of some of the ingested seeds, especially when the proportion of viable seeds remains high.
    Keywords Cecropia ; Triportheus ; body size ; forest trees ; freshwater ; intestines ; lowland forests ; pioneer species ; probability ; pulp ; seed germination ; seeds ; sympatry ; viability ; Amazonia
    Language English
    Dates of publication 2022-0729
    Publishing place Elsevier Masson SAS
    Document type Article
    Note Pre-press version
    ZDB-ID 1033625-4
    ISSN 1146-609X
    ISSN 1146-609X
    DOI 10.1016/j.actao.2022.103850
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  5. Article: The vascular epiphyte flora in a white-sand ecosystem of the Uatumã Sustainable Development Reserve, Central Amazon

    Klein, Viviane Pagnussat / Demarchi, Layon Oreste / Quaresma, Adriano Costa / da Cruz, Jefferson / Piedade, Maria Teresa Fernandez

    Check list. 2022 Feb. 17, v. 18, no. 1

    2022  

    Abstract: Amazon ecosystems have suffered constant losses due to fragmentation processes, which as a result puts associated biodiversity at risk. Although vascular epiphytes constitute a representative component of tropical forests, they are still poorly studied ... ...

    Abstract Amazon ecosystems have suffered constant losses due to fragmentation processes, which as a result puts associated biodiversity at risk. Although vascular epiphytes constitute a representative component of tropical forests, they are still poorly studied in white-sand ecosystems. We present a description and checklist of the vascular epiphytes present in white-sand ecosystems (campinaranas) in the Central Amazon. We also analyzed the structure and determined of the value of epiphytic importance (VEI) for the species. We recorded 112 species, 58 genera, and 16 families of vascular epiphytes. The greatest richness (95 spp.) was observed in forested phytophysiognomies. Orchidaceae (66 spp.), Bromeliaceae (12 spp.), and Araceae (9 spp.) were the richest families. Prosthechea aemula W.E.Higgins (Orchidaceae) had the highest VEI and accounted for about 28% of an abundance of individuals. Among the species, 36.6% have a distribution restricted to the Amazon region, which emphasizes the importance of the conservation of these environments.
    Keywords Araceae ; Bromeliaceae ; Orchidaceae ; biodiversity ; ecosystems ; epiphytes ; flora ; risk ; sustainable development ; Amazonia
    Language English
    Dates of publication 2022-0217
    Size p. 157-186.
    Publishing place Pensoft Publishers
    Document type Article
    ZDB-ID 2252867-2
    ISSN 1809-127X
    ISSN 1809-127X
    DOI 10.15560/18.1.157
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  6. Article: Demographic and growth patterns of Pentaclethra macroloba (Willd.) Kuntze, a hyperdominant tree in the Amazon River estuary

    Dantas, Adelson Rocha / Guedes, Marcelino Carneiro / Lira‐Guedes, Ana Cláudia / Schöngart, Jochen / Piedade, Maria Teresa Fernandez

    Population ecology. 2022 Apr., v. 64, no. 2

    2022  

    Abstract: Little is known about the life history and environmental factors that regulate the growth rate of hyperdominant trees in flooded Amazonian forests. Pentaclethra macroloba is a hyperdominant tree, and it is widely explored in the Amazon, because its seed ... ...

    Abstract Little is known about the life history and environmental factors that regulate the growth rate of hyperdominant trees in flooded Amazonian forests. Pentaclethra macroloba is a hyperdominant tree, and it is widely explored in the Amazon, because its seed oil is a powerful herbal medicine. We evaluated the demographic structure and growth patterns of P. macroloba and tested the effect of the Amazon River flood pulse on its growth. We modeled the growth and determined the age of P. macroloba by analyzing the growth rings of 30 monitored trees in relation to hydroclimatic variables. We also inventoried 240 juvenile and 2072 adult trees arranged in a clustered pattern. The diametric distribution pattern of the juvenile and adult trees was exponential and log‐normal, respectively. The trees were found to be up to 102 years old, and 47% of them grew freely toward the canopy. Peak growth in height and diameter occurred at 24 (61.7 cm year‐¹) and 46 (9.38 mm year‐¹) years, respectively. Pentaclethra macroloba showed cambial dormancy during the seasonal peak of rainfall (R² = 0.41; t = −2.62; p < 0.01) and flooding of the Amazon River (R² = 0.47; t = −3.01; p < 0.01). Increases in rainfall and flood level of the river in the rainy season control the growth rate of P. macroloba, making it a seasonal process. The demographic and growth patterns of P. macroloba respond to the environmental heterogeneity of the estuarine floodplain forest and also reflect its life history over time.
    Keywords Pentaclethra macroloba ; adults ; cambium ; canopy ; dormancy ; estuaries ; floodplains ; forests ; herbal medicines ; juveniles ; life history ; population ecology ; rain ; rivers ; seed oils ; trees ; wet season ; Amazon River
    Language English
    Dates of publication 2022-04
    Size p. 161-175.
    Publishing place John Wiley & Sons, Inc.
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2015635-2
    ISSN 1438-390X ; 1438-3896
    ISSN (online) 1438-390X
    ISSN 1438-3896
    DOI 10.1002/1438-390X.12112
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  7. Article: Edaphic characteristics drive functional traits distribution in Amazonian floodplain forests

    Mori, Gisele Biem / Poorter, Lourens / Schietti, Juliana / Piedade, Maria Teresa Fernandez

    Plant ecology. 2021 Mar., v. 222, no. 3

    2021  

    Abstract: Understanding how environmental factors drive community assembly remains a major challenge in community ecology, especially in biodiverse tropical forests. We investigated how environmental filters affect functional trait distribution in two contrasting ... ...

    Abstract Understanding how environmental factors drive community assembly remains a major challenge in community ecology, especially in biodiverse tropical forests. We investigated how environmental filters affect functional trait distribution in two contrasting types of floodplain forest in the Brazilian Amazon: white-water forest (várzea) and black-water forest (igapó). We placed 40 plots of 625 m² along a flooding gradient in Central Amazonia and measured for edaphic variables and 11 functional traits related to use of resources and flooding tolerance/avoidance. We assessed functional distribution by calculating community-trait mean values and trait kurtosis. Analysis of community mean trait values showed that nutrient-rich white-water forests favored trees with productive leaves and fast growth, whereas nutrient-poor black-water forests favored trees with nutrient conservation traits and slow growth. Functional diversity was not related to environmental gradients. Edaphic characteristics act, therefore, as a strong environmental filter leading to trait convergence in these floodplain tree communities.
    Keywords environmental factors ; floodplains ; functional diversity ; plant ecology ; statistical analysis ; trees ; Amazonia
    Language English
    Dates of publication 2021-03
    Size p. 349-360.
    Publishing place Springer Netherlands
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1364679-5
    ISSN 1573-5052 ; 1385-0237
    ISSN (online) 1573-5052
    ISSN 1385-0237
    DOI 10.1007/s11258-020-01110-4
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  8. Article ; Online: Predicting the range expansion of invasive alien grasses under climate change in the Neotropics

    Lopes, Aline / Demarchi, Layon Orestes / Piedade, Maria Teresa Fernandez / Schöngart, Jochen / Wittmann, Florian / Munhoz, Cássia Beatriz Rodrigues / Ferreira, Cristiane Silva / Franco, Augusto Cesar

    Perspectives in Ecology and Conservation. 2023 Apr., June, v. 21, no. 2 p.128-135

    2023  

    Abstract: A diverse group of invasive grasses from tropical and subtropical Africa and Asia has spread throughout the Neotropics over the last decades. Despite their strong ecological impact, current and future distribution patterns of these grasses in the region ... ...

    Abstract A diverse group of invasive grasses from tropical and subtropical Africa and Asia has spread throughout the Neotropics over the last decades. Despite their strong ecological impact, current and future distribution patterns of these grasses in the region according to climate change is poorly investigated. We chose ten high potential invasive grass species and used ecological niche modeling to project their geographic distribution within the Neotropics under four climate change scenarios (current, SSP1-2.6, SSP3-7.0 and SSP5-8.5 for 2100). Current climatically suitable areas for these invasive species were estimated to account for 51.3% of the Neotropics. Projections of future climatically suitable areas ranged between 47.0% and 57.6%, depending on the climate scenario. Range retractions are projected for Melinis repens and Urochloa decumbens regardless of the SSP scenario, while Arundo donax, Hyparrhenia rufa and Melinis minutiflora are expected to expand their range in all SSP scenarios. Currently, these ten invasive species have suitable areas that greatly overlap in dry regions of the Neotropics, mainly in the savannas of Central Brazil and Central America. However, a reduction in species overlap and a geographical expansion towards wetter regions is expected under the SSP1 and SSP3 scenarios, and towards drier regions under the SSP5 scenario.
    Keywords Arundo donax ; Hyparrhenia rufa ; Melinis minutiflora ; Melinis repens ; Neotropics ; Urochloa decumbens ; climate ; climate change ; environmental impact ; geographical distribution ; invasive species ; niches ; Africa ; Asia ; Brazil ; Central America ; Biological invasion ; Brachiaria ; Conservation ; Grass ; Species distribution modelling (SDM)
    Language English
    Dates of publication 2023-04
    Size p. 128-135.
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Use and reproduction
    ISSN 2530-0644
    DOI 10.1016/j.pecon.2023.02.005
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  9. Article: Phenological behavior and floral visitors of Pentaclethra macroloba, a hyperdominant tree in the Brazilian Amazon River estuary

    Dantas, Adelson Rocha / Guedes, Marcelino Carneiro / Lira-Guedes, Ana Cláudia / Piedade, Maria Teresa Fernandez

    Trees. 2021 June, v. 35, no. 3

    2021  

    Abstract: KEY MESSAGE: Amazon River tide is an environmental drive that stimulates Pentaclethra macroloba to disperse its seeds during the flood peak. Reproductive strategies of the species result in its dominance in the Amazon. Natural history of hyperdominant ... ...

    Abstract KEY MESSAGE: Amazon River tide is an environmental drive that stimulates Pentaclethra macroloba to disperse its seeds during the flood peak. Reproductive strategies of the species result in its dominance in the Amazon. Natural history of hyperdominant tree populations in the Brazilian Amazon Region is still unknown in plant science. Pentaclethra macroloba (Willd.) Kuntze (Fabaceae) is a hyperdominant tree species which has multiple uses and its seeds are extensively explored to extract medicinal oil. We evaluated the phenological cycles and floral visitors of P. macroloba and the effect of the daily tide of the Amazon River on the phenophases. Phenophases of flower bud, anthesis flowers, immature fruit, ripe fruit, seed dispersal, new leaf, mature leaf, and leaf fall of 29 trees in the Northeast of the Brazilian Amazon were monitored during 28 months. Hydrometeorological data of rainfall, maximum temperature and flood height on the tree trunk were obtained. Generalized Linear Models were used to explain the relationship between phenophases and hydrometeorological parameters. Flowering was synchronized in the dry season (flower buds: βₜₑₘₚₑᵣₐₜᵤᵣₑ = 1.30, p < 0.01 and flowers in anthesis: βₜₑₘₚₑᵣₐₜᵤᵣₑ = 1.84; p < 0.001). Immature fruits appeared during the dry season (βₜₑₘₚₑᵣₐₜᵤᵣₑ = 0.67; p < 0.01) and ripe fruits in the rainy season. Seeds were dispersed during the rainfall (βᵣₐᵢₙfₐₗₗ = 0.0051; p < 0.01) and flooding of the river (βwₐₜₑᵣ = 0.12; p < 0.001). There was no relationship between leaf change and hydrometeorological variables. The main floral visitors were wasps, bees and ants. The rainfall seasonality is a key factor that stimulates reproductive events of P. macroloba. Daily river flooding can be considered a driver that stimulates the tree to disperse its seeds at the peak of the river flood, where they can be transported the long distances.
    Keywords Pentaclethra macroloba ; dry season ; estuaries ; flower buds ; flowering ; flowers ; fruits ; hydrometeorology ; leaf abscission ; leaves ; natural history ; oils ; phenology ; rain ; rivers ; seed dispersal ; seeds ; temperature ; tree trunk ; trees ; wet season ; Amazon River ; Amazonia
    Language English
    Dates of publication 2021-06
    Size p. 973-986.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 90595-1
    ISSN 1432-2285 ; 0931-1890
    ISSN (online) 1432-2285
    ISSN 0931-1890
    DOI 10.1007/s00468-021-02095-x
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  10. Article ; Online: Trait divergence and habitat specialization in tropical floodplain forests trees.

    Mori, Gisele Biem / Schietti, Juliana / Poorter, Lourens / Piedade, Maria Teresa Fernandez

    PloS one

    2019  Volume 14, Issue 2, Page(s) e0212232

    Abstract: Habitat heterogeneity of tropical forests is thought to lead to specialization in plants and contribute to the high diversity of tree species in Amazonia. One prediction of habitat specialization is that species specialized for resource-rich habitats ... ...

    Abstract Habitat heterogeneity of tropical forests is thought to lead to specialization in plants and contribute to the high diversity of tree species in Amazonia. One prediction of habitat specialization is that species specialized for resource-rich habitats will have traits associated with high resource acquisition and fast growth while species specialized for resource-poor habitats will have traits associated with high resource conservation and persistence but slow growth. We tested this idea for seven genera and for twelve families from nutrient-rich white-water floodplain forest (várzea) and nutrient-poor black-water (igapó) floodplain forest. We measured 11 traits that are important for the carbon and nutrient balance of the trees, and compared trait variation between habitat types (white- and black-water forests), and the effect of habitat and genus/family on trait divergence. Functional traits of congeneric species differed between habitat types, where white-water forest species invested in resource acquisition and productive tissues, whereas black-water forest species invested in resource conservation and persistent tissues. Habitat specialization is leading to the differentiation of floodplain tree species of white-water and black-water forests, thus contributing to a high diversity of plant species in floodplain forests.
    MeSH term(s) Biodiversity ; Forests ; Models, Biological ; Trees/physiology ; Tropical Climate
    Language English
    Publishing date 2019-02-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0212232
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