Reconstructing the micrometeorological dynamics of the southern Amazonian transitional forest

2015 ◽  
Vol 25 (12) ◽  
pp. 123123
Author(s):  
Sergio Roberto de Paulo ◽  
Iramaia Jorge Cabral de Paulo ◽  
Yannick De Decker
Keyword(s):  
Transitional Forest

scholarly journals O Efeito do Fogo sobre a Comunidade de Abelhas Euglossini (Hymenoptera: Apidae) em Floresta de Transição Cerrado-Amazônia (Mato Grosso, Brasil)

2013 ◽  
Vol 6 (3) ◽  
pp. 178-183 ◽  
Author(s):  
Nubia França da Silva Giehl ◽  
Marco Bruno Xavier Valadão ◽  
Leandro Schlemmer Brasil ◽  
Josias Oliveira dos Santos ◽  
Sara Miranda Almeida ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Species Richness ◽  
Species Composition ◽  
Control Plot ◽  
The Other ◽  
Mato Grosso ◽  
Transitional Area ◽  
Orchid Bee ◽  
Transitional Forest ◽  
Fire Area

Os efeitos de queimadas induzidas sobre a comunidade de abelhas Euglossini (Hymenoptera: Apidae) foram avaliados em floresta de transição entre o Cerrado e a Floresta Amazônica, no leste do Estado de Mato Grosso, Brasil. A riqueza, abundância e a composição de Euglossini foram determinadas em uma área controle não queimada (preservada), uma área queimada anualmente desde 2004 (degradação intermediária) e uma área queimada trienalmente desde 2004 (degradação elevada). Testamos a hipótese de que áreas com diferentes frequências de queimadas apresentam menor abundância de machos, menor riqueza e diferente composição de espécies de Euglossini em relação à área controle. As técnicas de coleta ativa e passiva de abelhas foram aplicadas usando seis substâncias puras para atração dos machos: β-ionona, benzoato de benzila, geraniol, fenil-etil-acetato, salicilato de metila e vanilina. Sete espécies foram catalogadas e não houve diferença nas abundâncias entre as três áreas amostradas (F (2, 12) = 0,150; p= 0,8). A riqueza estimada de espécies na área controle foi superior à área com fogo trienal (12 ± 3,8; 4 ± 2, respectivamente), enquanto a área com fogo anual apresentou riqueza intermediária (8 ± 4,35) e superior àquela da área com fogo trienal. A análise de UPGMA revelou diferença significativa quanto a composição de espécies da área de fogo trienal para as outras duas áreas. As queimadas anual e trienal reduziram a riqueza de espécies e alteraram a composição de espécies, com efeitos mais evidentes na área com fogo trienal, causando efeitos deletérios sobre a comunidade das abelhas das orquídeas. The effect of Fire on the Community of Euglossini (Hymenoptera: Apidae) in a Cerrado-Amazon Transitional Forest (Mato Grosso, Brazil) Abstract. We evaluated the effects of induced burned on Euglossini bee assemblages (Hymenoptera: Apidae) in a transitional area between Cerrado and Amazonia, eastern Mato Grosso, Brazil. We determinate abundances, richness and composition of Euglossini in three plots: control plot (unburned), plot burned each year since 2004 (intermediate degradation), plot burned each three years since 2004 (high degradation). We tested the hypothesis that two burned plots present lower male abundances, less species richness and different species composition in comparison with the control plot. We collected male bees actively and passively by using six pure fragrances: β-ionona, benzoato de benzila, geraniol, fenil-etil-acetato, salicilato de metila e vanilina. We collected seven species with no differences in male abundances among three plots (F (2, 12)= 0.150; p= 0.8). Estimated richness species in control the plot was higher than the plot burned each three years (12 ± 3.8; 4± 2, respectively), while plot burned each year showed intermediate richness (8 ± 4.35) and higher than plot burned each three years. Cluster Analysis (UPGMA) revealed significant differences in species composition of the triennial fire area to the other two areas. Our results suggest that fire occurring with different frequencies in transitional forest promote decreases in richness of species and modifications in species composition. These modifications were clearer in plot more degraded (burned each three years) and induce deleterious effects on orchid bee assemblage.

Three new species of nocturnal geckos of the Paroedura oviceps clade from xeric environments of Madagascar (Squamata: Gekkonidae)

Zootaxa ◽  
2018 ◽  
Vol 4433 (2) ◽  
pp. 305
Author(s):  
FRANK GLAW ◽  
JÖRN KÖHLER ◽  
MIGUEL VENCES
Keyword(s):  
Mitochondrial Dna ◽  
New Species ◽  
National Park ◽  
Colour Pattern ◽  
Haplotype Sharing ◽  
The Third ◽  
Transitional Forest ◽  
Morphological Differences ◽  
Three New Species ◽  
Karst Habitats

We describe three new gecko species of the Paroedura oviceps clade, diagnosed by deep divergences in mitochondrial DNA, absence of haplotype sharing in two nuclear genes (sacs and kiaa1239), and morphological differences. Paroedura spelaea sp. nov. is an extremely slender species from karst habitats in the limestone massif of the Tsingy de Bemaraha National Park in western Madagascar, morphologically reminiscent of P. homalorhina but distinguished by the absence of distinct dorsal rows of spiny tubercles. Paroedura fasciata sp. nov. from the small karstic island Nosy Hara in northern Madagascar is phylogenetically placed sister to P. spelaea despite radical morphological differences. It is morphologically most similar to P. hordiesi from the geographically close Montagne des Français massif, but is smaller, has slightly more spiny dorsal scales, and a distinctive colour pattern with light grey dorsal crossbands. The third species, Paroedura kloki sp. nov., is known from Ankarafantsika National Park and the western slopes of Makira, two sites of dry to transitional forest in western Madagascar. It is at least partly arboreal and morphologically very similar to P. oviceps, from which it differs by spiny scales extending over its entire tail. Although incomplete, the available phylogenetic evidence suggests that the karst specialists in the P. oviceps clade (P. fasciata, P. homalorhina, P. hordiesi, P. spelaea) form a monophyletic group which might have diversified by vicariance after becoming isolated, respectively, in their limestone habitats in Tsingy de Bemaraha, Ankarana, Nosy Hara and Montagne des Français. 

scholarly journals Status of woodland caribou in Ontario: 1996

Rangifer ◽  
1998 ◽  
Vol 18 (5) ◽  
pp. 99 ◽  
Author(s):  
Harold G. Cumming
Keyword(s):  
Survey Methods ◽  
Lake Superior ◽  
Hudson Bay ◽  
Woodland Caribou ◽  
Habitat Types ◽  
Isolated Populations ◽  
Hudson Bay Lowlands ◽  
North East ◽  
Transitional Forest ◽  
Minimum Numbers

Over 20 000 woodland caribou were reported in Ontario during 1966, the highest figure ever published. Photographic counts of the Pen Islands herd, bordering Manitoba, have shown constant increases from 2300 in 1979 to 10 800 in 1994. Elsewhere in Ontario, estimates have been declining, from 13 000 in 1965 to 11 000 in 1989 to under 10 000 in 1996, a trend that may or may not be real because of differing survey methods. On the Hudson Bay Lowlands (excluding the Pen Islands caribou) 8600 were reported in 1965, 7200 in 1989, 5500 in 1996, an apparent decline. The transitional forest populations has remained stable. Estimated caribou numbers inhabiting the true boreal forest have dropped from nearly 4000 in 1965 to 2700 in 1996, but this decrease was not confirmed by careful within-district breakdowns of sub-populations by habitat types and may be an artifact of classification from districts to regions. The sharpest decrease was reported for the Central Region, north east of Lake Superior, where estimates dropped from 500 in 1965 to 475 in 1989 and to 68 in 1996. Individual caribou bands approach recognized minimum numbers for isolated populations, and even totals by sub-population remain low: over 1300 in commercial forests, about 500 in potentially commercial forests, and 8-900 in parks. Due to small numbers in widely dispersed band-locations, the potential for human disturbance affecting these forest dwelling caribou is substantial.

Ground and remote sensing-based measurements of leaf area index in a transitional forest and seasonal flooded forest in Brazil

2013 ◽  
Vol 58 (6) ◽  
pp. 1181-1193 ◽  
Author(s):  
Marcelo Sacardi Biudes ◽  
Nadja Gomes Machado ◽  
Victor Hugo de Morais Danelichen ◽  
Maísa Caldas Souza ◽  
George Louis Vourlitis ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Area Index ◽  
Flooded Forest ◽  
Transitional Forest

Late-Holocene successional dynamics in a transitional forest of west-central Mexico

The Holocene ◽  
2011 ◽  
Vol 22 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Blanca L. Figueroa-Rangel ◽  
Kathy J. Willis ◽  
Miguel Olvera-Vargas
Keyword(s):  
Late Holocene ◽  
Central Mexico ◽  
West Central ◽  
Transitional Forest

Ecosystem Services in a Transitional Forest Landscape: Shifting Trajectories in Southeast Michigan, USA

2018 ◽  
Vol 31 (4) ◽  
pp. 457-472
Author(s):  
Nathan Clay ◽  
Kayla Yurco ◽  
Arun Agrawal ◽  
Lauren Persha
Keyword(s):  
Ecosystem Services ◽  
Forest Landscape ◽  
Transitional Forest

scholarly journals Honey classification from semi-arid, Atlantic and transitional forest zones in Bahia, Brazil

2008 ◽  
Vol 19 (3) ◽  
pp. 502-508 ◽  
Author(s):  
José Soares dos Santos ◽  
Núbia Soares dos Santos ◽  
Maria Lúcia Pires dos Santos ◽  
Sabrina Novaes dos Santos ◽  
Julian Júnio de Jesus Lacerda
Keyword(s):  
Transitional Forest ◽  
Semi Arid

scholarly journals Estimation of gross primary production of the Amazon-Cerrado transitional forest by remote sensing techniques

2014 ◽  
Vol 29 (1) ◽  
pp. 01-12 ◽  
Author(s):  
Maísa Caldas Souza ◽  
Marcelo Sacardi Biudes ◽  
Victor Hugo de Morais Danelichen ◽  
Nadja Gomes Machado ◽  
Carlo Ralph de Musis ◽  
...  
Keyword(s):  
Primary Production ◽  
Vegetation Type ◽  
Gross Primary Production ◽  
Circulation Model ◽  
Lookup Table ◽  
Sensor Data ◽  
Climatic Data ◽  
Light Use Efficiency ◽  
Transitional Forest ◽  
Use Efficiency

The gross primary production (GPP) of ecosystems is an important variable in the study of global climate change. Generally, the GPP has been estimated by micrometeorological techniques. However, these techniques have a high cost of implantation and maintenance, making the use of orbital sensor data an option to be evaluated. Thus, the objective of this study was to evaluate the potential of the MODIS (Moderate Resolution Imaging Spectroradiometer) MOD17A2 product and the vegetation photosynthesis model (VPM) to predict the GPP of the Amazon-Cerrado transitional forest. The GPP predicted by MOD17A2 (GPP MODIS) and VPM (GPP VPM) were validated with the GPP estimated by eddy covariance (GPP EC). The GPP MODIS, GPP VPM and GPP EC have similar seasonality, with higher values in the wet season and lower in the dry season. However, the VPM performed was better than the MOD17A2 to estimate the GPP, due to use local climatic data for predict the light use efficiency, while the MOD17A2 use a global circulation model and the lookup table of each vegetation type to estimate the light use efficiency.

Ecological relationships among sympatric lizards in a transitional forest in the northern Amazon of Brazil

1998 ◽  
Vol 14 (1) ◽  
pp. 63-86 ◽  
Author(s):  
LAURIE J. VITT ◽  
PETER A. ZANI
Keyword(s):  
Species Interactions ◽  
Local Level ◽  
Light Availability ◽  
Prey Type ◽  
Lizard Species ◽  
Ecological Relationships ◽  
Amazon Rain Forest ◽  
Random Assortment ◽  
Transitional Forest ◽  
The Impact

Sympatric lizards in a transitional forest of Roraima, Brazil, dividing Amazon rain forest from savanna, contained a lizard assemblage of 16 species representing six families. Lizards varied in size, activity (diurnal versus nocturnal), microhabitats used, exposure to various conditions of light availability, prey types, and prey sizes. Overlaps in microhabitat occurrence varied from 0 (no overlap) to 1.0 (total overlap) whereas overlaps in prey types varied from 0.005 to 0.607. Microhabitat overlaps were higher overall than dietary overlaps. Pseudocommunity analyses on microhabitat data indicate that the community is not randomly assembled and that two distinct guilds exist, a leaf-litter guild and an arboreal guild, each with four species. Similar analyses on diet data revealed no apparent guild structure ast the first rank (nearest neighbour). Lizard diets did not differ from a random assortment based on prey type. At lower levels, the assemblage was structured with respect to food. Variation in prey use among lizard species was tied more closely to the effect of lizard body size on prey size (lizards ate different-sized prey items). Although exploitative competition among species may maintain structure within this assemblage it does not necessarily cause the observed differences. Several species are nearly identical ecologically to sister taxa in other environments and within different lizard assemblages suggesting that composition of the local assemblage limits the species that can enter the assemblage. Finally, lack of structure at the lowest (most similar) neighbour ranks may reflect the impact of a transitional habitat on stability of species interactions at the local level.

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