Photosynthetic parameters of young Brazil nut (Bertholletia excelsa H. B.) plants subjected to fertilization in a degraded area in Central Amazonia

2009 ◽  
Vol 47 (4) ◽  
pp. 616-620 ◽  
Author(s):  
M. J. Ferreira ◽  
J. F. C. Goncalves ◽  
J. B. S. Ferraz
Keyword(s):  
Photosynthetic Parameters ◽  
Brazil Nut ◽  
Bertholletia Excelsa ◽  
Degraded Area ◽  
Central Amazonia

scholarly journals Interactions between carpenter bees and orchid bees (Hymenoptera: Apidae) in flowers of Bertholletia excelsa Bonpl. (Lecythidaceae)

2012 ◽  
Vol 42 (1) ◽  
pp. 89-94 ◽  
Author(s):  
Charles Fernando dos Santos ◽  
Maria Lúcia Absy
Keyword(s):  
Interspecific Interactions ◽  
Solitary Bee ◽  
Brazil Nut ◽  
Bertholletia Excelsa ◽  
Carpenter Bees ◽  
The Family ◽  
Central Amazonia ◽  
Floral Resource ◽  
Antagonistic Interactions ◽  
Temporal Overlap

Competition between two species of bees for the same type of floral resource may generate antagonistic behavior between them, especially in cultivated areas where food resources are limited, seasonally and locally. In this study, was tested the hypothesis of antagonism between two solitary bee species of the family Apidae, Eulaema mocsaryi (Euglossini) and Xylocopa frontalis (Xylocopini), visiting the Brazil nut flowers (Bertholletia excelsa: Lecythidaceae) in a central Amazonia agricultural area. The visitation time was analyzed to detect the possible temporal overlap in the foraging of these bees. Furthermore, was analyzed their interspecific interactions for manipulating flower species visited by an opponent species, as well as attempts to attack this opponent. The individuals of Xylocopa frontalis visited the Brazil nut flowers before Eulaema mocsaryi, although the peak visitation of both did not presented significant differences. Neither of the species manipulated flowers recently visited by opponent species, and there were practically no antagonistic interactions between them. Thus, X. frontalis and E. mocsaryi shared the same food source in the flowers of B. excelsa due to differences in their time of visits and non-aggressive way of interacting with the opponent. This result has important implications for pollinating the Brazil nut, and a possible management of X. frontalis and E. mocsaryi, since these two were the most abundant pollinators in the studied locality.

Fruit Removal and Natural Seed Dispersal of the Brazil Nut Tree (Bertholletia excelsa) in Central Amazonia, Brazil

Biotropica ◽  
2011 ◽  
Vol 44 (2) ◽  
pp. 205-210 ◽  
Author(s):  
Joanne M. Tuck Haugaasen ◽  
Torbjørn Haugaasen ◽  
Carlos A. Peres ◽  
Rogerio Gribel ◽  
Per Wegge
Keyword(s):  
Seed Dispersal ◽  
Brazil Nut ◽  
Fruit Removal ◽  
Bertholletia Excelsa ◽  
Central Amazonia

scholarly journals Growth rings of Brazil nut trees (Bertholletia excelsa) as a living record of historical human disturbance in Central Amazonia

PLoS ONE ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. e0214128 ◽  
Author(s):  
Victor L. Caetano Andrade ◽  
Bernardo M. Flores ◽  
Carolina Levis ◽  
Charles R. Clement ◽  
Patrick Roberts ◽  
...  
Keyword(s):  
Human Disturbance ◽  
Brazil Nut ◽  
Growth Rings ◽  
Bertholletia Excelsa ◽  
Central Amazonia

scholarly journals Corrigendum to “Accurate mapping of Brazil nut trees (Bertholletia excelsa) in Amazonian forests using WorldView-3 satellite images and convolutional neural networks”

2021 ◽  
pp. 101326
Author(s):  
Matheus Pinheiro Ferreira ◽  
Rodolfo Georjute Lotte ◽  
Francisco V. D’Elia ◽  
Christos Stamatopoulos ◽  
Do-Hyung Kim ◽  
...  
Keyword(s):  
Neural Networks ◽  
Convolutional Neural Networks ◽  
Satellite Images ◽  
Brazil Nut ◽  
Bertholletia Excelsa ◽  
Amazonian Forests

Ant assemblages of Brazil nut trees Bertholletia excelsa in forest and pasture habitats in the Southwestern Brazilian Amazon

2018 ◽  
Vol 28 (2) ◽  
pp. 329-344
Author(s):  
Amanda Batista da Silva de Oliveira ◽  
Fernando Augusto Schmidt
Keyword(s):  
Brazilian Amazon ◽  
Brazil Nut ◽  
Bertholletia Excelsa ◽  
Ant Assemblages

scholarly journals Photosynthetic pigments and carbohydrates in young Brazil nut (Bertholletia excelsa H.B.K.) plants exposed to moderate and severe water deficiency

2016 ◽  
Vol 10 (07) ◽  
pp. 920-925 ◽  
Author(s):  
Paula Francyneth Nascimento Silva ◽  
◽  
Carla Leticia Figueredo de Carvalho Souza ◽  
Jose Rodrigo Mendes e Chagas ◽  
Gabriel Mascarenhas Maciel ◽  
...  
Keyword(s):  
Photosynthetic Pigments ◽  
Water Deficiency ◽  
Brazil Nut ◽  
Bertholletia Excelsa

scholarly journals Photosynthetic parameters and growth in seedlings of Bertholletia excelsa and Carapa guianensis in response to pre-acclimation to full sunlight and mild water stress

2014 ◽  
Vol 44 (1) ◽  
pp. 67-77 ◽  
Author(s):  
Gracilene Fernandes da Costa Azevedo
Keyword(s):  
Water Stress ◽  
Higher Plants ◽  
Field Capacity ◽  
Outdoor Exposure ◽  
Photosynthetic Parameters ◽  
Bertholletia Excelsa ◽  
Full Sunlight ◽  
Carapa Guianensis ◽  
Light Levels ◽  
Mild Water Stress

Light and water are important factors that may limit the growth and development of higher plants. The aim of this study was to evaluate photosynthetic parameters and growth in seedlings of Bertholletia excelsa and Carapa guianensis in response to pre-acclimation to full sunlight and mild water stress. I used six independent pre-acclimation treatments (0, 90 (11h15-12h45), 180 (10h30-13h30), 360 (09h00-15h00), 540 (07h30-16h30) and 720 min (06h00-18h00)) varying the time of exposure to full sunlight (PFS) during 30 days, followed by whole-day outdoor exposure for 120 days. Before PFS, the plants were kept in a greenhouse at low light levels (0.8 mol m-2 day-1). The PFS of 0 min corresponded to plants constantly kept under greenhouse conditions. From the beginning to the end of the experiment, each PFS treatment was submitted to two water regimes: moderate water stress (MWS, pre-dawn leaf water potential (ΨL) of -500 to -700 kPa) and without water stress (WWS, ΨL of -300 kPa, soil kept at field capacity). Plants under MWS received only a fraction of the amount of water applied to the well-watered ones. At the end of the 120-day-period under outdoor conditions, I evaluated light saturated photosynthesis (Amax), stomatal conductance (g s), transpiration (E) and plant growth. Both Amax and g s were higher for all plants under the PFS treatment. Stem diameter growth rate and Amax were higher for C. guianensis subjected to MWS than in well-watered plants. The contrary was true for B. excelsa. The growth of seedlings was enhanced by exposure to full sunlight for 180 minutes in both species. However, plants of B. excelsa were sensitive to moderate water stress. The higher photosynthetic rates and faster growth of C. guianensis under full sun and moderate water stress make this species a promissory candidate to be tested in reforestation programs.

scholarly journals Distribution extension and geographic distribution map of the Brazil-nut poison dart frog Adelphobates castaneoticus (Caldwell & Myers, 1990) (Anura: Dendrobatidae): new record for southwestern Pará State, Brazil

Check List ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 244 ◽  
Author(s):  
Bruno Felipe Camera ◽  
Diones Krinski
Keyword(s):  
Geographic Distribution ◽  
New Record ◽  
Distribution Map ◽  
Brazil Nut ◽  
Bertholletia Excelsa ◽  
Oviposition Sites

Adelphobates castaneoticus uses the woody husks of Brazil nut trees, Bertholletia excelsa, (without nuts and filled with water) as oviposition sites. Three specimens of A. castaneoticus were found near Brazil nut trees in Novo Progresso, Pará State, Brazil. This record increases the distribution this species more than 500 km to the southwest.

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