40 documents found, page 1 of 4
Tracking the impacts of El Niño drought and fire in human-modified Amazonian fo...
Berenguer, Erika; Lennox, Gareth D.; Ferreira, Joice; Malhi, Yadvinder; Aragão, Luiz E.O.C.; Barreto, Julia Rodrigues; Del Bon Espírito-Santo, FernandoMade available in DSpace on 2022-04-28T19:42:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-07-27; With humanity facing an unprecedented climate crisis, the conservation of tropical forests has never been so important – their vast terrestrial carbon stocks can be turned into emissions by climatic and human disturbances. However, the duration of these effects is poorly understood, and it is unclear wh...
Variations in soil chemical and physical properties explain basin-wide Amazon f...
Quesada, Carlos Alberto; Paz, Claudia [UNESP]; Mendoza, Erick Oblitas; Phillips, Oliver Lawrence; Saiz, Gustavo; Lloyd, JonMade available in DSpace on 2020-12-10T19:49:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-02-11; Natural Environment Research Council; Gordon and Betty Moore Foundation; European Research Council; EU Seventh Framework Programme; Royal Society of London Research Merit Award; Sao Paulo Excellence Chair; We investigate the edaphic, mineralogical and climatic controls of soil organic carbon (SOC) conce...
Variations in Amazon forest productivity correlated with foliar nutrients and m...
Mercado, Lina; Patiño, Sandra; null, Tomas; Fyllas, Nikolaos M.; Weedon, Graham P.; Sitch, Stephen A.; Quesada, Carlos Alberto; Phillips, Oliver L.The rate of above-ground woody biomass production, WP, in some western Amazon forests exceeds those in the east by a factor of 2 or more. Underlying causes may include climate, soil nutrient limitations and species composition. In this modelling paper, we explore the implications of allowing key nutrients such as N and P to constrain the photosynthesis of Amazon forests, and also we examine the relationship bet...
The Amazon Tall Tower Observatory (ATTO): Overview of pilot measurements on eco...
Andreae, Meinrat O.; Acevedo, Otávio C.; Araüjo, Alessandro Carioca de; Artaxo, Paulo; Barbosa, Cybelli G.G.; Barbosa, H. M. J.; Brito, Joel F.The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, and biodiversity. It has already been changed significantly by human activities, and more pervasive change is expected to occur in the coming decades. It is therefore essential to establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, and atmospheric cond...
Multiple phosphorus acquisition strategies adopted by fine roots in low-fertili...
Lugli, Laynara F.; Andersen, Kelly M.; Aragao, L. E.O.C.; Cordeiro, Amanda L.; Cunha, Hellen Fernanda Viana; Fuchslueger, Lucia; Meir, Patrick W.Background and aims: Ancient Amazon soils are characterised by low concentrations of soil phosphorus (P). Therefore, it is hypothesised that plants may invest a substantial proportion of their resources belowground to adjust their P-uptake strategies, including root morphological, physiological (phosphatase enzyme activities) and biotic (arbuscular mycorrhizal (AM) associations) adaptations. Since these strateg...
Soil physical restrictions and hydrology regulate stand age and wood biomass tu...
Cintra, Bruno Bar?ante Ladvocat; Schietti, Juliana; Emillio, T.; Martins, Demétrius L.; Moulatlet, Gabriel M.; Souza, Priscila F.; Levis, CarolinaIn Amazonia, wetlands constitute about 30% of its entire basin, of which ancient fluvial terraces located in vast interfluvial regions cover a large portion. Although the increased number of permanent plots in the recent years has contributed to improved understanding of regional variation in forest dynamics across the Amazon Basin, the functioning of large lowland interfluvial wetlands remain poorly understood...
Do species traits determine patterns of wood production in Amazonian forests?
Baker, Timothy R.; Phillips, Oliver L.; Laurance, William F.; Pitman, Nigel C.A.; Almeida, Samuel Miranda; Arroyo, Luzmila P.; Di Fiore, AnthonyUnderstanding the relationships between plant traits and ecosystem properties at large spatial scales is important for predicting how compositional change will affect carbon cycling in tropical forests. In this study, we examine the relationships between species wood density, maximum height and above-ground, coarse wood production of trees ≥10 cm diameter (CWP) for 60 Amazonian forest plots. Average species max...
Forest structure along a 600 km transect of natural disturbances and seasonalit...
Schietti, Juliana; Martins, Demétrius L.; Emilio, Thaise; Souza, Priscila F.; Levis, Carolina; Baccaro, Fabricio BeggiatoA negative relationship between stand biomass and the density of stems is expected to develop during the self-thinning process in resource-limited forests; this leads to a large proportion of the total biomass occurring in large trees. Nevertheless, frequent disturbance regimes can reduce self-thinning and the accumulation of large trees. We investigated size–density relationships and the contribution of large ...
Evolutionary heritage influences amazon tree ecology
Souza, Fernanda Coelho de; Dexter, Kyle Graham; Phillips, Oliver L.; Brienen, Roel J.W.; Chave, Jérôme; Galbraith, David R.; Lopez-Gonzalez, GabrielaLineages tend to retain ecological characteristics of their ancestors through time. However, for some traits, selection during evolutionary history may have also played a role in determining trait values. To address the relative importance of these processes requires large-scale quantification of traits and evolutionary relationships among species. The Amazonian tree flora comprises a high diversity of angiospe...
Height-diameter allometry of tropical forest trees
Feldpausch, Ted R.; Banin, Lindsay F.; Phillips, Oliver L.; Baker, Timothy R.; Lewis, Simon L.; Quesada, Carlos Alberto; Affum-Baffoe, KofiTropical tree height-diameter (<i>H:D</i>) relationships may vary by forest type and region making large-scale estimates of above-ground biomass subject to bias if they ignore these differences in stem allometry. We have therefore developed a new global tropical forest database consisting of 39 955 concurrent <i>H</i> and <i>D</i> measurements encompassing 283 sites in 22 tropical countries. Utilising this data...