scholarly journals Checklist of orchid bees (Hymenoptera: Apidae) of “Lago do Silêncio” Area, Boca do Acre, Amazonas, Brazil

Check List ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 648 ◽  
Author(s):  
Danielle Storck-Tonon ◽  
Marilene Vasconcelos Silva ◽  
Elder Ferreira Morato
Keyword(s):  
Amazon Region ◽  
Sampling Effort ◽  
Orchid Bees ◽  
Brazilian Amazonia ◽  
Brazilian State ◽  
Euglossine Bee ◽  
Southwestern Amazonia

This study presents a list of euglossine-bee species collected in the Lago do Silêncio region, municipality of Boca do Acre, in the Brazilian state of Amazonas, southwestern Amazonia. Euglossine males were attracted to odoriferous baits on December 3 and 4, 2004. A total of 234 individuals belonging to four genera and 25 species were collected. Despite the small sampling effort, the local euglossine fauna is abundant and rich, when compared to those of other areas in the Brazilian Amazonia where higher sampling efforts were performed. Therefore, further studies in the region can be important for improving our knowledge of the bees in the Amazon region. 

Catalogue of distribution of lizards (Reptilia: Squamata) from the Brazilian Amazonia. III. Anguidae, Scincidae, Teiidae

Zootaxa ◽  
2016 ◽  
Vol 4205 (5) ◽  
pp. 401 ◽  
Author(s):  
MARCO A. RIBEIRO-JÚNIOR ◽  
SILVANA AMARAL
Keyword(s):  
Species Level ◽  
Distribution Data ◽  
Semideciduous Forest ◽  
Brazilian Amazonia ◽  
Disjunct Populations ◽  
Areas Of Endemism ◽  
Gallery Forests ◽  
Present Distribution ◽  
Southwestern Amazonia ◽  
Area Data

We present distribution data of all Anguidae, Scincidae, and Teiidae lizards known from the Brazilian Amazonia, totaling 29 species-level taxa, belonging to 14 genera. This represents 11 more species-level taxa than previously reported for these families in this area. Data were based on literature and 46,806 specimens deposited in three North American and eight Brazilian museums, including the main collections harboring Amazonian material. Most species (~55%) are endemic to Amazonia. Except for Ameiva ameiva, that is present in several environments and domains, non-endemic species are either associated with open dry (semideciduous) forest or open vegetation (savanna) enclaves in Amazonia, occupying similar environments outside Amazonia, gallery forests within the Cerrado, or present disjunct populations in the Atlantic Forest. As a whole, six taxa are widespread in Amazonia, four are restricted to eastern Amazonia, four to western Amazonia, three to southwestern Amazonia, one to northern Amazonia, and seven to the southern peripheral portion of Amazonia. Besides, two species present apparently more restricted, unique distributions. Only three species have a distribution that is congruent with one of the areas of endemism (AE) recognized for other organisms (birds and primates), of which two occur in AE Guiana and one in AE Inambari. 

scholarly journals Monumentality in Western Amazonian formative societies: geometric ditched enclosures in the Brazilian state of Acre

Antiqua ◽  
2012 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Sanna Saunaluoma ◽  
Denise Schaan
Keyword(s):  
Public Spaces ◽  
Formative Period ◽  
Aerial Photographs ◽  
Complex Societies ◽  
Cultural Interaction ◽  
Radiocarbon Dates ◽  
Brazilian State ◽  
Amazonian Region ◽  
Southwestern Amazonia

In Amazonia, monumentality has traditionally been considered characteristic of the late pre-colonial densely populated complex societies. Recent archaeological fieldwork concerning the geometric earthworks in the Brazilian state of Acre has shown that the southwestern Amazonian interfluvial zone was a significant setting for long-term large landscape modifications. We describe the geometric ditched enclosure sites of Acre as early monumental public spaces reserved for ceremonial purposes, analogous to the central Andean ceremonial-civic centers of the Formative period. The geometric earthwork sites contain contiguous ditches and embankment structures of varying forms enclosing areas typically 3-10 hectares in size. Documented cultural features are sparse within the enclosed areas. Making use of satellite imagery, aerial photographs, and pedestrian surveys, 360 earthwork enclosures have been recorded in southwestern Amazonia. Our radiocarbon dates suggest that construction and use of geometric earthworks began at the latest around 1000 BC, and prevailed in the region until 1400 AD. The relatively small number of ceramics recovered from the geometric ditched enclosure sites appear to be local substyles of the same tradition, sharing certain attributes with contemporary ceramic traditions of the upper Amazonian region. This, and consistency in ceremonial earthwork architecture, indicate close cultural interaction between communities that built and used the earthwork sites, and imply probable relationships also with the central Andean area.

scholarly journals A Preliminary Checklist of the Orchid Bees (Hymenoptera: Apidae: Euglossini) of Ecuador

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Pablo S. Padrón ◽  
David W. Roubik ◽  
Ruben P. Picón
Keyword(s):  
New Records ◽  
Valid Species ◽  
Sampling Effort ◽  
Orchid Bees ◽  
Southern Ecuador ◽  
Species Lists ◽  
Collection Data ◽  
Doubtful Species ◽  
Uneven Sampling ◽  
Natural Pattern

A checklist of Euglossini in Ecuador is given, including all currently described, valid species collected until 2018. The list has been assembled from museum records, fieldwork cited herein, and literature. The former species lists are nearly doubled here, with 1 Aglae, 23 Eufriesea, 68 Euglossa, 18 Eulaema, and 5 Exaerete, 115 in total with >50 new records for the country. Distribution and collection data are included, and some doubtful species are discussed. The Amazon region is the most species rich area but not necessarily a natural pattern, perhaps due to uneven sampling effort across the country. Southern Ecuador is relatively little sampled.

The Rate and Extent of Deforestation in Brazilian Amazonia

1990 ◽  
Vol 17 (3) ◽  
pp. 213-226 ◽  
Author(s):  
Philip M. Fearnside
Keyword(s):  
Amazon Region ◽  
Brazilian Amazonia ◽  
Best Estimate

Examination of the often contradictory estimates of the rate and extent of deforestation in Brazilian Amazonia leads to a ‘best estimate’ of the cumulative area of forest cleared through 1988 as 345 × 103 km2 (including old clearings), or 8.2% of the 4 × 106 km2 forested portion of Brasil's 5 × 106 km2 ‘Legal Amazon’ region.

Catalogue of distribution of lizards (Reptilia: Squamata) from the Brazilian Amazonia. IV. Alopoglossidae, Gymnophthalmidae

Zootaxa ◽  
2017 ◽  
Vol 4269 (2) ◽  
pp. 151 ◽  
Author(s):  
MARCO A. RIBEIRO-JÚNIOR ◽  
SILVANA AMARAL
Keyword(s):  
Species Complex ◽  
Species Level ◽  
Distribution Data ◽  
Lizard Species ◽  
Semideciduous Forest ◽  
Brazilian Amazonia ◽  
Present Distribution ◽  
Southern Amazonia ◽  
Reported Data ◽  
Southwestern Amazonia

We present distribution data of all Alopoglossidae and Gymnophthalmidae lizards known from the Brazilian Amazonia, totaling 54 species-level taxa, belonging to 17 genera and two families. This represents 22 more species-level taxa than previously reported. Data were based on 17,431 specimens deposited in three North American and eight Brazilian museums, including the main collections harboring Amazonian material. Most species (~80%) are endemic to Amazonia; non-endemic species are mainly associated with open vegetation (savanna) enclaves or open dry (semideciduous) forest in Amazonia, with a few exceptions. As a whole, seven taxa (including one species complex) are widespread in Amazonia, six are restricted to eastern Amazonia, seven to western Amazonia, two to southwestern Amazonia, 11 to southern Amazonia, 11 to northern Amazonia (either in part of it or widespread in the Guiana region), and six to the southern peripheral portion of Amazonia. Besides, four species present unique distributions. Considering this study and the other three catalogues of distribution of lizards already published, the total number of lizard species from Brazilian Amazonia increased from 97 to 142 species-level tava. It represents an increase of 45 species from the region since the last revision.

Patterns of diversity and gaps in vascular (hemi-)epiphyte flora of Southwestern Amazonia

Phytotaxa ◽  
2014 ◽  
Vol 166 (4) ◽  
pp. 259 ◽  
Author(s):  
FLÁVIO A. OBERMULLER ◽  
LEANDRO FREITAS ◽  
DOUGLAS C. DALY ◽  
MARCOS SILVEIRA
Keyword(s):  
Floristic Composition ◽  
The State ◽  
Sampling Effort ◽  
Vascular Epiphytes ◽  
General Index ◽  
True Diversity ◽  
Northern Brazil ◽  
Taxonomic Groups ◽  
Total Species ◽  
Southwestern Amazonia

Vascular epiphytes are common in tropical forests and represent a considerable part of the biodiversity in Southwestern Amazonia. The aim of this study was to determine the floristic composition, patterns of species richness, and geographical distribution and knowledge gaps (collection effort) of the epiphytic vascular flora of the Brazilian State of Acre. We analyzed the database of the Flora of Acre and found a total of 331 species and 32 families of angiosperms and ferns. Almost half of the epiphytic flora of Acre (48% of species) occurs only in Northern Brazil. Of the total species, 56% are restricted to Amazonia. The distribution of the number of collections of epiphytes is concentrated in a few locations in the state and there is a positive correlation between the number of collections of epiphytes and the general index of collection density. The low and unequal sampling effort of epiphytes across the State, the high proportion of specimens identified at best to genus, and the still steep species/sampling curve indicates that the true diversity of epiphytes in Southwestern Amazonia is expressively higher than recorded thus far. This highlights the need for efforts specifically focused on documenting under-represented taxonomic groups as well as more thorough inventory of the canopy flora in this region of Amazonia.

scholarly journals Diversity of Pre-colonial Earthworks in the Brazilian State of Acre, Southwestern Amazonia

2018 ◽  
Vol 43 (5) ◽  
pp. 362-379 ◽  
Author(s):  
Sanna Saunaluoma ◽  
Martti Pärssinen ◽  
Denise Schaan
Keyword(s):  
Brazilian State ◽  
Southwestern Amazonia

Different Physiognomies and the Structure of Euglossini bee (Hymenoptera: Apidae) Communities

Sociobiology ◽  
2018 ◽  
Vol 65 (3) ◽  
pp. 471 ◽  
Author(s):  
Clycie Aparecida da Silva Machado ◽  
Claudineia Pereira Costa ◽  
Tiago Maurício Francoy
Keyword(s):  
Atlantic Forest ◽  
Deciduous Forest ◽  
Climatic Factors ◽  
Atlantic Rain Forest ◽  
Pairwise Similarity ◽  
Orchid Bees ◽  
Geographical Distances ◽  
Euglossine Bee ◽  
One Year ◽  
Bee Communities

Our aim was to evaluate the occurrence of orchid bees in remnants of the Atlantic Forest. We sampled specimens from five regions of Southeast Brazil, covering three different physiognomies of the Atlantic Forest (mixed Araucaria forests with high altitude fields, Atlantic Semi-deciduous Forest and Atlantic Rain Forest). The distances between the sampling sites ranged from 24 to 746 km. Male orchid bees attracted by fragrances were actively sampled monthly during one year using entomological nets and aromatic traps. A total of 1,482 bees were captured, including four genera and at least 31 species. We observed differences in the abundance and richness of species sampled among sites. Climatic variables, mostly relative humidity, explained twice more of the observed differences in the Euglossini communities than simple spatial variation. Our study found differences in the composition of euglossine bee communities as well as in their patterns of abundance and dominance among different vegetation formations. However, the level of pairwise similarity among the Euglossini communities sampled, although highly variable, was not related to climatic factors or geographical distances between the sampling sites. The greatest dissimilarities in the composition of the orchid bee communities were observed between sites around 400 km from each other rather than among sites that were further apart. A possible explanation is that the sampled areas that were 400 km from each other were also highly dissimilar regarding climate, especially altitude.

UAV survey at archaeological earthwork sites in the Brazilian state of Acre, southwestern Amazonia

2019 ◽  
Vol 26 (4) ◽  
pp. 325-331 ◽  
Author(s):  
Sanna Saunaluoma ◽  
Niko Anttiroiko ◽  
Justin Moat
Keyword(s):  
Brazilian State ◽  
Southwestern Amazonia

Morphology of the Vessel Elements in the Secondary Xylem of the Myristicaceae from Brazilian Amazonia

IAWA Journal ◽  
1987 ◽  
Vol 8 (3) ◽  
pp. 202-212 ◽  
Author(s):  
Pedro L. B. Lisboa ◽  
J. Cesar A. da Silva ◽  
A. A. Loureiro ◽  
Gracielza M. dos A. dos Santos
Keyword(s):  
Morphological Study ◽  
Secondary Xylem ◽  
Brazilian Amazon ◽  
Amazon Region ◽  
Simple Type ◽  
Brazilian Amazonia ◽  
Brazilian Amazon Region ◽  
Vessel Elements ◽  
Perforation Plates

A morphological study of vessel elements was carried out in species representing the five genera of Myristicaceae present in the Brazilian Amazon region. The results show that perforation plates of the scalariform type predominate in Compsoneura, Iryanthera and Otoba, where as perforation plates of the simple type predominate in Osteophloeum and Virola. The phylogenetic and taxonomie implications of these findings are discussed.

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