Anna Abrahão

Anna Abrahão
University of Hohenheim · Department of Soil Biology

Doctor of Philosophy

About

24
Publications
10,299
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268
Citations
Additional affiliations
March 2010 - present
University of Campinas
Position
  • PhD Student

Publications

Publications (24)
Article
Full-text available
In old, phosphorus (P)-impoverished habitats, root specializations such as cluster roots efficiently mobilize and acquire P by releasing large amounts of carboxylates in the rhizosphere. These specialized roots are rarely mycorrhizal. We investigated whether Discocactus placentiformis (Cactaceae), a common species in nutrient-poor campos rupestres...
Article
Full-text available
Background and Aims Euplassa cantareirae is a Neotropical Proteaceae, native to the Restinga forest in Brazil and it experiences a wide array of adverse environmental conditions, especially seasonal flooding and low nutrient availability. We aimed to investigate the effects of phosphorus (P) supply on plant growth and cluster root formation, as wel...
Chapter
Full-text available
Campos rupestres are rocky seasonally-dry environments that occur over mountaintops in central Brazil. Plant growth is limited and prone to fire during the dry winter, and soils are severely nutrient-impoverished. Plants in these habitats exhibit a wide range of strategies to cope with these limitations. Campos rupestres plants show different rooti...
Article
Full-text available
Background and aimsThe survival and coexistence of plants in water-limited environments are related to their ability to coordinate water acquisition and regulation of water loss. To assess the coordination among below and aboveground hydraulic traits and the diversity of water-use strategies, we evaluated rooting depth and several leaf hydraulic tr...
Article
Full-text available
During long-term ecosystem development and its associated decline in soil phosphorus (P) availability, the abundance of mycorrhizal plant species declines at the expense of non-mycorrhizal species with root specialisations for P-acquisition, such as massive exudation of carboxylates. Leaf manganese (Mn) concentration has been suggested as a proxy f...
Preprint
Full-text available
Experimental evidence shows that grassland plant diversity enhances ecosystem functioning. Yet, the transfer of results from controlled biodiversity experiments to naturally assembled ‘real world’ ecosystems remains challenging. Here, we address this issue by experimentally sowing locally absent plant species in 73 agricultural grasslands along a l...
Preprint
Full-text available
Experimental evidence shows that grassland plant diversity enhances ecosystem functioning. Yet, the transfer of results from controlled biodiversity experiments to naturally assembled ‘real world’ ecosystems remains challenging. Here, we address this issue by experimentally sowing locally absent plant species in 73 agricultural grasslands along a l...
Chapter
Full-text available
Dieses Kapitel beschreibt die biologische Vielfalt der brasilianischen Savanne, des Cerrado. Wir werden die Aufmerksamkeit, die dem Cerrado in den internationalen Medien zuteil wird, mit der des Amazonaswaldes vergleichen und darauf hinweisen, dass der Cerrado stärker bedroht ist. Anschließend werden wir einige der Bedrohungen erläutern, wie z. B....
Article
Full-text available
Around 40% of the original Brazilian savannah territory is occupied by pastures dominated by fast‐growing exotic C4 grasses, which impact ecosystem nutrient cycling. The restoration of these areas depends on the re‐establishment of soil processes. We assessed how restoration of abandoned pastures through direct seeding of native species and land‐ma...
Article
Full-text available
Species loss leads to changes in ecosystem function and services, impacting human well-being. Although biodiversity restoration is pivotal to circumvent this situation, the techniques for restoring old-growth savannas are still limited and the restoration outcomes remain unpredictable. Here, we use a trait-based approach to understand the functiona...
Article
Full-text available
The campos rupestres (rocky grassland) comprise an old-growth seasonally dry herbaceous ecosystem on mountaintops in central and eastern Brazil and in disjoint areas with sparse shrubs with high plant diversity and endemism. This ecosystem consists of sharp-edged quartzite landforms and rocky hillslopes with boulders, blocks, and sparse soil cover....
Article
Full-text available
Restoration techniques tailored to grasslands are needed to improve the effectiveness of restoration in tropical landscapes. In this study, we investigated the joint effects of plant–soil legacies and soil inocula in native and invaded Cerrado grasslands to evaluate whether different microbial origins affect plant–soil feedbacks and the likelihood...
Article
Full-text available
1. Tropical savannas are known for the fire-prone ecosystems, yet, riparian evergreen forests are another important landscape feature. These forests usually remain safe from wildfires in the wet riparian zones. With global changes, large wildfires are now more frequent in savanna landscapes, exposing riparian forests to unprecedented impact. 2. In...
Article
Full-text available
Global sustainability rests on a myriad of benefits provided by natural ecosystems that support human livelihoods and well-being, from biodiversity persistence to climate regulation. The undeniable importance of conserving tropical forests has drawn most of the conservation spotlight towards it. However, open ecosystems such as the Brazilian Campo...
Article
Full-text available
Plant growth on harsh substrates (habitat specialisation) requires specific traits to cope with stressful conditions. We tested whether traits related to nutrient acquisition (root colonisation by fungal symbionts, and plant morphological and physiological specialisations), and nutrient use (leaf nitrogen (N) and phosphorus (P) concentrations and N...
Article
Full-text available
The rocky, seasonally-dry and nutrient-impoverished soils of the Brazilian campos rupestres impose severe growth-limiting conditions on plants. Species of a dominant plant family, Velloziaceae, are highly specialized to low-nutrient conditions and seasonal water availability of this environment, where phosphorus (P) is the key limiting nutrient. De...
Article
Full-text available
1. Campos rupestres is an extremely phosphorus (P)‐impoverished rocky ecosystem in Brazil. Velloziaceae is an important plant family in this environment, and some species colonize exposed quartzite rock. However, we know virtually nothing about their root development and nutrient acquisition within the rock outcrops and their possible role in rock...
Article
Full-text available
1.Understanding the mechanisms that underlie the generation of beta‐diversity remains a challenge in ecology. Underground plant adaptations to environmental gradients have received relatively little attention. 2.We studied plant nutrient‐acquisition strategies and nutrient‐use efficiency at three stages of pedogenesis in infertile soils from campos...
Article
There is a certain ambiguity in the taxonomy of Amphicytherura Butler & Jones, Aracajuia Krömmelbein and Sondagella Dingle. Recent publications have addressed the separation of these three genera, but a deeper taxonomic analysis is still needed. Aracajuia benderi Krömmelbein, type-species of Aracajuia and an index fossil for the upper Aptian-Albian...
Data
There is a certain ambiguity in the taxonomy of Amphicytherura Butler & Jones, Aracajuia Krömmelbein and Sondagella Dingle. Recent publications have addressed the separation of these three genera, but a deeper taxo-nomic analysis is still needed. Aracajuia benderi Krömmelbein, type-species of Aracajuia and an index fossil for the upper Aptian–Albia...

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Projects

Projects (2)
Archived project
It aims to study in detail the taxonomy of ostracode associations recovered from Riachuelo Formation, Sergipe-Alagoas basin, State of Sergipe, northeastern Brazil. Its objectives are to extend the knowledge about the biodiversity, biostratigraphy and paleoecology of the Aptian-Albian of the referred basin. It will give new elements to establish the relationship of the Alagoas Stage in Brazil with the international Aptian and Albian stages, especially with chronocorrelate layers from other Brazilian and West African marginal basins.