ORCID Profile
0000-0001-7257-874X
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Publisher: Wiley
Date: 06-09-2022
DOI: 10.1111/AEC.13235
Abstract: In Cerrado humid areas, veredas are considered as hygrophilous communities, with an herbaceous/shrub stratum in open areas and an arboreal stratum in forest areas. We identified the sexual and reproductive systems of woody species, and the distribution of these systems among the different habitats and plants habits in this ecosystem. We investigated whether the occurrence of sexual and reproductive systems may be related to ecological and/or evolutionary factors and if hermaphroditism predominates in open areas. In this case, we evaluated which reproductive strategies promote cross‐pollination and which species are dependent on pollinating agents to promote the reproductive process. We selected the species according to a phytosociological study, using plots distributed in parallel transects and allocated in the hygrophilous forest and open areas. Floral morphology analyses, self‐pollination treatments, presence of barriers that prevent self‐pollination, phylogenetic signal and literature survey were performed. We did not find phylogenetic signal evidence for the traits evaluated. Most species are trees, followed by shrubs and sub‐shrubs. Dioecy predominated among tree species in the open area, with hermaphroditism more related to shrub species in the open areas. Shrubs and sub‐shrubs were mainly represented by autogamous and apomictic species. Despite autogamy and apomixis were related to the open areas, we found no significant difference between the habitats. In veredas , that are considered a poorly resilient environment that has constant problems with recent anthropogenic activities, we expected a high number of autogamous and apomictic species. However, the results showed that most species have characteristics that promote allogamy and are pollinating agents dependent for reproduction.
Publisher: Wiley
Date: 23-05-2023
DOI: 10.1111/AEC.13369
Abstract: Changes in vegetation cover due to increasing frequencies of extreme climate events and anthropogenic pressure are already underway so, predicting the impacts of the near‐future climate will be essential for developing mitigation strategies. We modelled the responses of Brazilian biomes to a future scenario (2070) of steady increases in atmospheric CO 2 levels, adding soil data to better represent the multidimensional space of the environmental suitability of each biome. We also assessed the effects of changes in environmental suitability on the Brazilian network of protected areas and projected those effects on 1 km resolution maps. The area predicted to be affected by future climate change in Brazil and the consequent loss of suitable habitat surface is 2.59 Mkm 2 – larger than the combined areas of Central America and Mexico – leading the current vegetation to a progressive replacement. We project major changes in the vegetation of the Amazon basin, with the replacement of rainforest by dryer vegetation in the southern and eastern regions of that basin, and the opening of a dry corridor in Pará State. We also project an expansion of 41% of the current caatinga cover in the Brazilian semiarid region, with large losses of suitable habitat surface of the current deciduous forest. Approximately, 37% of the coverage of protected areas in Brazil will be affected – with greater damage to indigenous lands. The speed of current environmental change is now unprecedented for the post‐glacial era, and will almost certainly lead to increased rates of extinction and the collapse of transition ecosystems. We propose the urgent creation of protected areas in regions designed without significant impacts, but contiguous to those that will be more seriously affected by climate change. Those areas will act as refugia preserving bio ersity, ecosystem services, and the cultural heritages of traditional populations.
Publisher: Wiley
Date: 26-07-2023
DOI: 10.1111/AEC.13394
Abstract: Changes in vegetation cover due to increasing frequencies of extreme climate events and anthropogenic pressure are already underway so, predicting the impacts of the near‐future climate will be essential for developing mitigation strategies. We modelled the responses of Brazilian biomes to a future scenario (2070) of steady increases in atmospheric CO levels, adding soil data to better represent the multidimensional space of the environmental suitability of each biome. We also assessed the effects of changes in environmental suitability on the Brazilian network of protected areas and projected those effects on 1 km resolution maps. The area predicted to be affected by future climate change in Brazil and the consequent loss of suitable habitat surface is 2.59 Mkm 2 – larger than the combined areas of Central America and Mexico – leading the current vegetation to a progressive replacement. We project major changes in the vegetation of the Amazon basin, with the replacement of rainforest by dryer vegetation in the southern and eastern regions of that basin, and the opening of a dry corridor in Pará State. We also project an expansion of 41% of the current caatinga cover in the Brazilian semiarid region, with large losses of suitable habitat surface of the current deciduous forest. Approximately, 37% of the coverage of protected areas in Brazil will be affected – with greater damage to indigenous lands. The speed of current environmental change is now unprecedented for the post‐glacial era, and will almost certainly lead to increased rates of extinction and the collapse of transition ecosystems. We propose the urgent creation of protected areas in regions designed without significant impacts, but contiguous to those that will be more seriously affected by climate change. Those areas will act as refugia preserving bio ersity, ecosystem services, and the cultural heritages of traditional populations.
Publisher: Elsevier BV
Date: 2022
No related grants have been discovered for Rúbia Fonseca.