Seed dormancy in tree species of the Tropical Brazilian Atlantic Forest and its relationships with seed traits and environmental conditions

2015 ◽  
Vol 38 (2) ◽  
pp. 243-264 ◽  
Author(s):  
Thaysi Ventura de Souza ◽  
Izabel Christina Torres ◽  
Neusa Steiner ◽  
Maria Terezinha Silveira Paulilo
Keyword(s):  
Atlantic Forest ◽  
Seed Dormancy ◽  
Environmental Conditions ◽  
Tree Species ◽  
Brazilian Atlantic Forest ◽  
Seed Traits

scholarly journals Ecologic salience and agreement on the identification of tree species from Brazilian Atlantic Forest

2010 ◽  
Vol 10 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Natalia Hanazaki ◽  
Rogério Mazzeo ◽  
Alexandre Romariz Duarte ◽  
Vinícius Castro Souza ◽  
Ricardo Ribeiro Rodrigues
Keyword(s):  
Atlantic Forest ◽  
Local Knowledge ◽  
Tree Species ◽  
Species Abundance ◽  
Average Height ◽  
Brazilian Atlantic Forest ◽  
Community Based ◽  
Botanical Species ◽  
Community Based Conservation ◽  
High Diversity

This study aims to investigate the consensus among informants in the naming of tree species from a high diversity environment, the Brazilian Atlantic Forest (Sete Barras, SP), through a methodological procedure based on standardized stimuli. Seven selected local experts on tree species used for timber and handicrafts were asked to walk individually across the same area of 1.72 ha and identify and name all the known trees of more than 4 cm DBH (diameter at breast height) using common names. All trees were botanically identified, and their DBH and height were measured. The ecologic salience of tree species, expressed in terms of abundance, average height and DBH, was tested in relation to the informants' knowledge and species naming. The guided walks resulted on 708 identification events, with common names corresponding to 122 botanical species, or 68% of all tree species present. Both the reduced abundance and ecological salience of rare species can explain their recognition. The highest concordances in naming a tree were related only to the species abundance and not to their size (given by diameter and height). In some cases, there is no single common name for a botanical species, reflecting the intrinsic variation in local knowledge, which must be considered in ethnobotanical studies, in ecological assessments based on local knowledge, as well as in community-based conservation and management programs.

scholarly journals Forest edge in the Brazilian Atlantic forest: drastic changes in tree species assemblages

Oryx ◽  
2004 ◽  
Vol 38 (4) ◽  
pp. 389-394 ◽  
Author(s):  
Marcondes A. Oliveira ◽  
Alexandre S. Grillo ◽  
Marcelo Tabarelli
Keyword(s):  
Atlantic Forest ◽  
Tree Species ◽  
Current System ◽  
Forest Edge ◽  
Species Assemblages ◽  
Brazilian Atlantic Forest ◽  
Forest Fragment ◽  
Forest Interior ◽  
The Mean ◽  
Threatened Tree Species

In this study we surveyed all trees ≥10 cm diameter at breast height within 20 0.1 ha plots in a 3,500 ha forest fragment, surrounded by sugar cane fields, of the Brazilian Atlantic forest to compare tree species assemblages at the forest edge (0–100 m into forest) vs forest interior (>200 m). Plots were perpendicular to the margin. The mean number of tree species was significantly higher in the forest interior (35.4 ± SD 7.1 vs 18.4 ± SD 4.4). In addition, forest edge differed from interior in the proportion of shade-tolerant, emergent, large/very large-fruited species, and large-seeded tree species. Among the 134 tree species recorded, 24% were exclusive to the forest edge and 57% to the forest interior. Our results suggest that both the current system of protected areas and archipelagos of small fragments (1) tend to retain only a subset of the original flora, (2) will converge in terms of floristic and ecological composition (biotic simplification and homogenization), and (3) will lose rare and threatened tree species.

Redefinition of Croton macrobothrys (Euphorbiaceae), a tree species from the Brazilian Atlantic Forest, with the description of a new subspecies

Phytotaxa ◽  
2016 ◽  
Vol 273 (1) ◽  
pp. 51 ◽  
Author(s):  
MARIA BEATRIZ ROSSI CARUZO ◽  
RAFAELA FREITAS DOS SANTOS ◽  
ANA CARLA FEIO ◽  
RENATA MARIA STROZI ALVES MEIRA ◽  
RICARDA RIINA
Keyword(s):  
Atlantic Forest ◽  
Geographic Distribution ◽  
Tree Species ◽  
Minas Gerais ◽  
Brazilian Atlantic Forest ◽  
Nomen Nudum ◽  
New Subspecies ◽  
New Finding

Croton macrobothrys subsp. septentrionalis, a new subspecies of section Cyclostigma from the Brazilian Atlantic Forest, is here described and illustrated. It occurs in moist forests between 100–1000 m of elevation in the states of Bahia, Alagoas, and NE Minas Gerais. Given this new finding, we expand the morphological delineation of Croton macrobothrys and update its geographic distribution. We also provide a key to the two subspecies and identify the name C. macrobothrys var. microbothrys as a nomen nudum under Croton echioideus in section Adenophylli.

Tree-ring formation, radial increment and climate–growth relationship: assessing two potential tree species used in Brazilian Atlantic forest restoration projects

Trees ◽  
2019 ◽  
Vol 33 (3) ◽  
pp. 877-892 ◽  
Author(s):  
Rafael P. Albuquerque ◽  
Arno F. N. Brandes ◽  
Claudio S. Lisi ◽  
Luiz Fernando Duarte De Moraes ◽  
Claudia F. Barros
Keyword(s):  
Atlantic Forest ◽  
Tree Ring ◽  
Tree Species ◽  
Forest Restoration ◽  
Ring Formation ◽  
Radial Increment ◽  
Brazilian Atlantic Forest

scholarly journals Evaluation of Hyperspectral Multitemporal Information to Improve Tree Species Identification in the Highly Diverse Atlantic Forest

2020 ◽  
Vol 12 (2) ◽  
pp. 244 ◽  
Author(s):  
Gabriela Takahashi Miyoshi ◽  
Nilton Nobuhiro Imai ◽  
Antonio Maria Garcia Tommaselli ◽  
Marcus Vinícius Antunes de Moraes ◽  
Eija Honkavaara
Keyword(s):  
Species Identification ◽  
Atlantic Forest ◽  
Tree Species ◽  
Brazilian Atlantic Forest ◽  
Random Forest Classification ◽  
Promising Tool ◽  
Forest Classification ◽  
Successional Stages ◽  
Multitemporal Remote Sensing ◽  
Leave One Out

The monitoring of forest resources is crucial for their sustainable management, and tree species identification is one of the fundamental tasks in this process. Unmanned aerial vehicles (UAVs) and miniaturized lightweight sensors can rapidly provide accurate monitoring information. The objective of this study was to investigate the use of multitemporal, UAV-based hyperspectral imagery for tree species identification in the highly diverse Brazilian Atlantic forest. Datasets were captured over three years to identify eight different tree species. The study area comprised initial to medium successional stages of the Brazilian Atlantic forest. Images were acquired with a spatial resolution of 10 cm, and radiometric adjustment processing was performed to reduce the variations caused by different factors, such as the geometry of acquisition. The random forest classification method was applied in a region-based classification approach with leave-one-out cross-validation, followed by computing the area under the receiver operating characteristic (AUCROC) curve. When using each dataset alone, the influence of different weather behaviors on tree species identification was evident. When combining all datasets and minimizing illumination differences over each tree crown, the identification of three tree species was improved. These results show that UAV-based, hyperspectral, multitemporal remote sensing imagery is a promising tool for tree species identification in tropical forests.

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