Mercedes Maria da Cunha Bustamante

Mercedes Maria da Cunha Bustamante
University of Brasília | UnB · Department of Ecology

About

190
Publications
73,915
Reads
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15,905
Citations
Citations since 2016
55 Research Items
10753 Citations
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Introduction
Skills and Expertise

Publications

Publications (190)
Article
The Brazilian Cerrado is one of the most biodiverse savannas in the world, yet 46% of its original cover has been cleared to make way for crops and pastures. These extensive land-use transitions (LUTs) are expected to influence regional climate by reducing evapotranspiration (ET), increasing land surface temperature (LST), and ultimately reducing p...
Article
The Brazilian Cerrado, the most biodiverse savanna globally with great importance for water and carbon conservation, faces the impacts of rapid and extensive land conversion, mainly for agricultural uses. The native Cerrado vegetation originally covered an area of 204 Mha however, 43% has been converted to human use. Pastures are the major land use...
Chapter
This Report provides a comprehensive, objective, open, transparent, systematic, and rigorous scientific assessment of the state of the Amazon’s ecosystems, current trends, and their implications for the long-term well-being of the region, as well as opportunities and policy relevant options for conservation and sustainable development.
Book
Full-text available
The Working Group III (WG III) contribution to the IPCC’s Sixth Assessment Report (AR6) assesses literature on the scientific, technological, environmental, economic and social aspects of mitigation of climate change. The report reflects new findings in the relevant literature and builds on previous IPCC reports, including the WG III contribution t...
Article
Nutrient enrichment and the subsequent chemical changes in dystrophic savanna soils may alter plant richness and nutrient use efficiency, thereby affecting leaf litter chemistry and decomposition. However, the role of soil mesofauna in litter decomposition in savanna ecosystems under nutrient enrichment is not well understood. In soils from a long-...
Article
There is an increasing recognition that, although the climate change and biodiversity crises are fundamentally connected, they have been primarily addressed independently and a more integrated global approach is essential to tackle these two global challenges. Nature‐based Solutions (NbS) are hailed as a pathway for promoting synergies between the...
Article
Full-text available
Natural ponds in the Brazilian Cerrado harbor high biodiversity but are still poorly studied, especially their microbial assemblage. The characterization of the microbial community in aquatic environments is fundamental for understanding its functioning, particularly under the increasing pressure posed by land conversion and climate change. Here, w...
Article
Full-text available
Biological nitrogen-fixation (BNF) represents the main input source of N in tropical savannas. BNF could be particularly important for Brazilian savannas (known as Cerrado) that show a highly conservative N cycle. We evaluated the effects of seasonal precipitation and nutrient additions on the nifH gene abundance in soils from a long-term fertilizat...
Article
Full-text available
We characterized soil bacterial and archaeal communities under native Cerrado vegetation and their responses to increases in soil pH. The experimental area was subjected to lime additions for eight consecutive years, followed by an 11-year interval and an additional lime application. We collected soil samples in the rainy and dry seasons of 2017 (r...
Chapter
The activities related to the International Nitrogen Initiative (INI) Latin America Regional Centre started in the early 2000s, in association with the international actions within the nitrogen (N) field. The office in Latin America was proposed in the context of broad global and local environmental changes and the agricultural need for nutrient ad...
Preprint
Full-text available
Eusocial animals, such as the termites, often build a nest-like structure called a mound that provides shelter with stable internal conditions and protection against predators. Termites are important components of the Brazilian Cerrado biota. This study aimed to investigate the bacterial community composition and diversity of the Syntermes wheeleri...
Article
Full-text available
Worldwide, alien plant invasions have been intensively studied in the past decades, but mechanisms controlling the invasibility of native communities are not fully understood yet. The stochastic niche hypothesis predicts that species-rich plant communities are less prone to alien plant invasions than species-poor communities, which is supported by...
Article
An understanding of fire behaviour and its impacts on natural ecosystems is essential for developing management strategies, specifically for planning prescribed fires. It is well known that vegetation and microclimate factors are important predictors of fire behaviour. However, the relative importance of these factors and how fire behaviour respond...
Article
A group of scientists created in 2015 the Brazilian Platform on Biodiversity and Ecosystem Services (BPBES), the first national-level initiative to emerge independently but inspired by the enterprise undertaken by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES). The main goal of BPBES is to develop asses...
Article
Full-text available
Climate change is a global phenomenon that affects biophysical systems and human well-being. The Paris Agreement of the United Nations Framework Convention on Climate Change entered into force in 2016 with the objective of strengthening the global response to climate change by keeping global temperature rise this century well below 2 °C above pre-i...
Article
Pasture degradation in the Brazilian Cerrado, the second largest biome in South America, is a widespread problem that leads to serious environmental consequences. Thus pasture restoration is crucial, not only because of the economic importance of meat production in Brazil, but also for mitigation of soil erosion and the effects of climate change. F...
Article
Climate change is a global phenomenon that affects biophysical systems and human well-being. The Paris Agreement of the United Nations Framework Convention on Climate Change entered into force in 2016 with the objective of strengthening the global response to climate change by keeping global temperature rise this century well below 2 °C above pre-i...
Article
Full-text available
Biodiversity and ecosystems are important elements for addressing national and global socioeconomic and environmental crises, since they provide new development opportunities, for example, as source of job and income creation, and reduction in poverty and socioeconomic inequity. Brazilian biological diversity is also expressed in its immense cultur...
Article
1.Widespread degradation of tropical forests is caused by a variety of disturbances that interact in ways that are not well understood. 2.To explore potential synergies between edge effects, fire and windstorm damage as causes of Amazonian forest degradation, we quantified vegetation responses to a 30‐minute high‐intensity windstorm that in 2012, s...
Article
Full-text available
In times of rapid global change, ecosystem monitoring is of utmost importance. Combined field and remote sensing data enable large‐scale ecosystem assessments, while maintaining local relevance and accuracy. In heterogeneous landscapes, however, the integration of field‐collected data with remote sensing image pixels is not a trivial matter. Indeed...
Article
Full-text available
Cerrado is the second largest biome in South America and accounted for the second largest contribution to carbon emissions in Brazil for the last 10 years, mainly due to land-use changes. It comprises approximately 2 million km² and is divided into 22 ecoregions, based on environmental conditions and vegetation. The most dominant vegetation type is...
Data
Destructive sampling data from Delitti et al. [17], used as an independent validation data set. (XLSX)
Data
Destructive sampling data used to develop tree aboveground allometric models for cerrado sensu stricto in Brazil. (XLSX)
Data
Detailed data on 77 cerrado sensu stricto sites and their respective tree aboveground biomass density (calculated with model 11) and confidence interval limits (CIL). (XLSX)
Data
Plot data of the 77 cerrado sensu stricto sites in Brazil used in our analyses. For more information on site data, refer to S3 Table. (XLSX)
Data
Tree aboveground biomass density of 77 cerrado sensu stricto sites in Brazil. Bold values indicate significant differences in mean biomass between sites (P < 0.05; Kruskal–Wallis test). (XLSX)
Article
Full-text available
In times of rapid global change, ecosystem monitoring is of utmost importance. Combined field and remote sensing data enable large‐scale ecosystem assessments, while maintaining local relevance and accuracy. In heterogeneous landscapes, however, the integration of field‐collected data with remote sensing image pixels is not a trivial matter. Indeed...
Article
Full-text available
Background: The quantification and spatially explicit mapping of carbon stocks in terrestrial ecosystems is important to better understand the global carbon cycle and to monitor and report change processes, especially in the context of international policy mechanisms such as REDD+ or the implementation of Nationally Determined Contributions (NDCs)...
Article
Full-text available
The paper “Are Brazil deforesters avoiding detection?” recently published in Conservation Letters by Richards et al. 2016 has critical shortcomings and conclusions based on biased and not very robust analyses. Here we provide clarifications to some of the most critical points regarding the monitoring of land use changes in the Brazilian Amazon and...
Article
Full-text available
We review the ecological and socio-economic impacts of the catastrophic dam failure in Mariana, Brazil. Tailing management practices by Samarco mining company ultimately caused a dam breach that abruptly discharged between 55 and 62 million m³ of tailings into the Doce River watershed. On November 5th, 2015, a tsunami of slurry engulfed the small d...
Article
In a context of international scrutiny, important efforts are being made to preserve Brazil’s tropical forests. Meanwhile, the destruction of its Cerrado biome advances with increasing leaps but little controversy. Yet the damaging changes threaten life-supporting natural resources and ecosystem services that are vital for the majority of Brazilian...
Article
Full-text available
The objective of this work was to evaluate the effect of two legumes (Crotalaria juncea and Mucuna pruriens), as cover crops, and of natural fallow, as a control treatment, on the emissions of NO x , N 2 O, and CO 2 from an Oxisol cultivated with corn, under conventional and no-tillage systems, in the Cerrado region, in Central Brazil. Variations o...
Article
Global change has tremendous impacts on savanna systems around the world. Processes related to climate change or agricultural expansion threaten the ecosystem’s state, function and the services it provides. A prominent example is the Brazilian Cerrado that has an extent of around 2 million km² and features high biodiversity with many endemic specie...
Article
Full-text available
Changes in carbon stocks in different compartments of soil organic matter of a clayey Latossolo Vermelho Distrófico (Typic Haplustox), caused by the substitution of native savanna vegetation (cerrado sensu stricto) by agroecosystems, were assessed after 31 years of cultivation. Under native vegetation, a stock of 164.5 Mg ha-1 C was estimated in th...
Article
Full-text available
Soils are subject to varying degrees of direct or indirect human disturbance, constituting a major global change driver. Factoring out natural from direct and indirect human influence is not always straightforward, but some human activities have clear impacts. These include land use change, land management, and land degradation (erosion, compaction...
Article
Full-text available
Background and aims The diverse flora of the Brazilian Cerrado is threatened by agricultural expansion, nutrient enrichment and invasion of alien plants. We performed a fertilization experiment to investigate the nature of nutrient limitation in Cerrado vegetation, and evaluate whether native and alien invasive species are limited by the same or di...
Article
Full-text available
The Cerrado, the largest savanna region in South America, is located in central Brazil. Cerrado physiognomies, which range from savanna grasslands to forest formations, combined with the highly weathered, acidic clay Cerrado soils form a unique ecoregion. In this study, high-throughput sequencing of ribosomal RNA genes was combined with shotgun met...
Data
Conceptual map of variation in the relative abundance of soil microbial communities. Main observations from this study as a proposal for structure of soil microbial communities during the well-marked seasons of the Cerrado biome. (PDF)
Data
Physicochemical properties of soils collected from the cerrado denso, campo sujo, cerrado sensu stricto, and gallery forest physiognomies in the dry season. (DOCX)
Data
Correlations between the relative abundance of the archaea Thermoplasmata and fungi Saccharomyceta and Agaricomycotina and soil moisture content in the Cerrado biome. Pearson correlation coefficients (r) are shown with P values corrected using the Benjamini–Hochberg false discovery rate procedure. (EPS)
Data
(a) Monthly rainfall (mm) in the IBGE Ecological Reserve, Brasília, DF during the period in which soil samples were collected. (b) Soil moisture measurements in the dry and rainy season in the cerrado denso (CD), campo sujo (CS), cerrado sensus tricto (SS), and gallery forest (MG) (n = 3 for each physiognomy). Error bars represent standard deviatio...
Article
Full-text available
Soils play a pivotal role in major global biogeochemical cycles (carbon, nutrient and water), while hosting the largest diversity of organisms on land. Because of this, soils deliver fundamental ecosystem services, and management to change a soil process in support of one ecosystem service can either provide co-benefits to other services or can res...
Article
Full-text available
Tropical deforestation changes the surface energy balance and water cycle, but how much change occurs strongly depends on the land uses that follow deforestation. Here, we quantify how recent (2000–2010) transitions among widespread land uses (i.e., forests, croplands, and pastures) altered the water and energy balance in the Xingu region of southe...
Article
Tropical forests harbor a significant portion of global biodiversity and are a critical component of the climate system. Reducing deforestation and forest degradation contributes to global climate-change mitigation efforts, yet emissions and removals from forest dynamics are still poorly quantified. We reviewed the main challenges to estimate chang...
Article
Full-text available
Urbanization and land use changes alter the nitrogen (N) cycle, with critical consequences for continental freshwater resources, coastal zones, and human health. Sewage and poor watershed management lead to impoverishment of inland water resources and degradation of coastal zones. Here we review the N contents of rivers of the three most important...
Conference Paper
Full-text available
Monitoring of the Brazilian Cerrado biome is crucial in order to fully understand its ecosystem functions, its response to changes, and to keep track of ongoing change processes in one of the world's biodiversity hotspots. The huge extent, heterogeneity and complex diversity of the Cerrado makes monitoring very challenging, but optical remote sensi...
Article
Full-text available
Over the past two decades, Brazil has emerged as an environmental leader, playing a prominent role in international fora such as the United Nations (UN) Conferences on Sustainable Development. The country has earned praise for the expansion of its protected area (PA) network and reductions in Amazon deforestation. Yet these successes are being comp...
Article
Full-text available
Over the past two decades, Brazil has emerged as an environmental leader, playing a prominent role in international fora such as the United Nations (UN) Conferences on Sustainable Development. The country has earned praise for the expansion of its protected area (PA) network and reductions in Amazon deforestation. Yet these successes are being comp...