scholarly journals Karyotypic data of five ant taxa from the Brazilian Atlantic rainforest

Sociobiology ◽  
2020 ◽  
Vol 67 (4) ◽  
pp. 604
Author(s):  
Gisele Amaro Teixeira ◽  
Luísa Antônia Campos Barros ◽  
Denilce Meneses Lopes ◽  
Hilton Jeferson Alves Cardoso de Aguiar
Keyword(s):  
Chromosomal Evolution ◽  
Biodiversity Hotspot ◽  
Atlantic Rainforest ◽  
Cytogenetic Studies ◽  
Brazilian Atlantic Rainforest

The Brazilian Atlantic rainforest is an endangered biome and biodiversity hotspot. Ant cytogenetic studies from this biome showed remarkable chromosomal diversity among species, and provided useful insights on phylogeny, chromosomal evolution, and taxonomy. In this study, we karyotyped five ant taxa from the Atlantic rainforest. The karyotypes observed were Pheidole germaini 2n=22, Pheidole sp. flavens group 2n=20, Brachymyrmex admotus 2n=18, Camponotus atriceps 2n=40, and Odontomachus haematodus 2n=44. The data obtained for Pheidole spp. represent the first chromosomal record for the genus in Brazil and provide insights on the chromosomal evolution of P. germaini. Karyotypic information from B. admotus brings the genus back to the cytogenetic scenario after decades of neglect. No karyotype variations were observed among the C. atriceps and O. haematodus from different already studied populations, corroborating their status as good species. This study increased the cytogenetic knowledge of ants from the Brazilian Atlantic rainforest.

scholarly journals Chromosomal painting of the sandpiper (Actitis macularius) detects several fissions for the Scolopacidae family (Charadriiformes)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Melquizedec Luiz Silva Pinheiro ◽  
Cleusa Yoshiko Nagamachi ◽  
Talita Fernanda Augusto Ribas ◽  
Cristovam Guerreiro Diniz ◽  
Patricia Caroline Mary O´Brien ◽  
...  
Keyword(s):  
Chromosome Painting ◽  
Diploid Number ◽  
Chromosomal Evolution ◽  
Long Distance ◽  
Chromosomal Painting ◽  
Cytogenetic Studies ◽  
Burhinus Oedicnemus ◽  
Clear Idea ◽  
First Time

Abstract Background The Scolopacidae family (Suborder Scolopaci, Charadriiformes) is composed of sandpipers and snipes; these birds are long-distance migrants that show great diversity in their behavior and habitat use. Cytogenetic studies in the Scolopacidae family show the highest diploid numbers for order Charadriiformes. This work analyzes for the first time the karyotype of Actitis macularius by classic cytogenetics and chromosome painting. Results The species has a diploid number of 92, composed mostly of telocentric pairs. This high 2n is greater than the proposed 80 for the avian ancestral putative karyotype (a common feature among Scolopaci), suggesting that fission rearrangements have formed smaller macrochromosomes and microchromosomes. Fluorescence in situ hybridization using Burhinus oedicnemus whole chromosome probes confirmed the fissions in pairs 1, 2, 3, 4 and 6 of macrochromosomes. Conclusion Comparative analysis with other species of Charadriiformes studied by chromosome painting together with the molecular phylogenies for the order allowed us to raise hypotheses about the chromosomal evolution in suborder Scolopaci. From this, we can establish a clear idea of how chromosomal evolution occurred in this suborder.

scholarly journals First records of Scotaena Klug, 1810 species (Hymenoptera, Tiphiidae, Thynninae) in the Brazilian Atlantic Rainforest

Check List ◽  
2017 ◽  
Vol 13 (4) ◽  
pp. 255-260
Author(s):  
Fernando Carnimeo ◽  
Cíntia Eleonora Lopes Justino ◽  
Fernando Barbosa Noll
Keyword(s):  
Atlantic Rainforest ◽  
Brazilian Atlantic Rainforest

Does ecophysiological behaviour explain habitat occupation of sympatric Clusia species in a Brazilian Atlantic rainforest?

Trees ◽  
2015 ◽  
Vol 29 (6) ◽  
pp. 1973-1988 ◽  
Author(s):  
Ulrich Lüttge ◽  
Fabio R. Scarano ◽  
Eduardo A. de Mattos ◽  
Augusto C. Franco ◽  
Fernando Broetto ◽  
...  
Keyword(s):  
Atlantic Rainforest ◽  
Brazilian Atlantic Rainforest

scholarly journals Conservation Status of Brachycephalus Toadlets (Anura: Brachycephalidae) from the Brazilian Atlantic Rainforest

Diversity ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 150
Author(s):  
Marcos R. Bornschein ◽  
Marcio R. Pie ◽  
Larissa Teixeira
Keyword(s):  
Conservation Status ◽  
Iucn Red List ◽  
Critically Endangered ◽  
Atlantic Rainforest ◽  
Minimum Convex Polygon ◽  
Iucn Red List Categories ◽  
Data Deficient ◽  
Polygon Method ◽  
Official Recognition ◽  
Brazilian Atlantic Rainforest

The number of described anurans has increased continuously, with many newly described species determined to be at risk. Most of these new species inhabit hotspots and are under threat of habitat loss, such as Brachycephalus, a genus of small toadlets that inhabits the litter of the Brazilian Atlantic Rainforest. Of 36 known species, 22 were described in the last decade, but only 11 have been assessed according to the IUCN Red List categories, with just one currently listed as Critically Endangered. All available data on occurrence, distribution, density, and threats to Brachycephalus were reviewed. The species extent of occurrence was estimated using the Minimum Convex Polygon method for species with three or more records and by delimiting continuous areas within the altitudinal range of species with up to two records. These data were integrated to assess the conservation status according to the IUCN criteria. Six species have been evaluated as Critically Endangered, five as Endangered, 10 as Vulnerable, five as Least Concern, and 10 as Data Deficient. Deforestation was the most common threat to imperiled Brachycephalus species. The official recognition of these categories might be more readily adopted if the microendemic nature of their geographical distribution is taken into account.

Typhlomyrmex meire, a remarkable new species endemic to Southern Bahia, Brazil (Formicidae: Ectatomminae)

Zootaxa ◽  
2004 ◽  
Vol 678 (1) ◽  
pp. 1 ◽  
Author(s):  
SEBASTIEN LACAU ◽  
CLAIRE VILLEMANT ◽  
JACQUES H.C. DELABIE
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Identification Key ◽  
Atlantic Rainforest ◽  
Southern Bahia ◽  
Brazilian Atlantic Rainforest

The worker, queen and male of the ant Typhlomyrmex meire Lacau, Villemant & Delabie new spe- cies (Ectatomminae: Typhlomyrmecini) are described from the Brazilian Atlantic rainforest. This endemic species from southern Bahia is easily distinguished from all other members of the genus by the peculiar morphology of mandibles and the reduction of the antennal segments observed in both sexes. We provide a partial redefinition of the genus diagnosis taking into account the antennal structure of the new species. A new identification key for workers is provided.

Paleoclimate Changes during the last 100,000 yr from a Record in the Brazilian Atlantic Rainforest region and Interhemispheric Comparison

2005 ◽  
Vol 64 (3) ◽  
pp. 444-450 ◽  
Author(s):  
M.-P. Ledru ◽  
D.-D. Rousseau ◽  
F.W. Cruz ◽  
C. Riccomini ◽  
I. Karmann ◽  
...  
Keyword(s):  
Global Climate ◽  
Ice Core ◽  
Climatic Changes ◽  
Climate Forcing ◽  
Atlantic Rainforest ◽  
Tropical Atlantic ◽  
Forest Expansion ◽  
Last Glaciation ◽  
Arboreal Pollen ◽  
Brazilian Atlantic Rainforest

AbstractA long terrestrial record, Colônia CO-3, from the Atlantic rainforest region in Brazil (23°52′S, 46°42′20 ʺW, 900 m a.s.l.) registrates variations in the forest expansion during the last 100,000 yr. The 780-cm depth core was analyzed at 2-cm intervals and arboreal pollen frequencies were compared to nearby speleothem stable isotope records and neighboring marine records from the tropical Atlantic. To evaluate regional versus global climate forcing, our record was compared with Greenland and Antarctic ice-core records. These comparisons suggest that changes in temperature seen in polar latitudes relate to moisture changes: e.g., to changes in the length of the dry season, in tropical and subtropical latitudes during glacial as well as interglacial times. These climatic changes result from changes in the frequency of polar air incursions to these latitudes inducing a permanent cloud cover and precipitation. This is an important result that should help define paleoclimatic features in the Southern Hemisphere for the last glaciation.

Three new species of Aulonemia (Poaceae: Bambusoideae) from the Brazilian Atlantic rainforest

Phytotaxa ◽  
2014 ◽  
Vol 156 (4) ◽  
pp. 235 ◽  
Author(s):  
Pedro Lage Viana ◽  
Tarciso S. Filgueiras
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Unusual Feature ◽  
Atlantic Rainforest ◽  
Habitat Distribution ◽  
Brazilian Species ◽  
In The Wild ◽  
Three New Species ◽  
Brazilian Atlantic Rainforest

Three new Brazilian species of Aulonemia, a Neotropical woody bamboo genus, are described and illustrated: Aulonemia cincta, with its distinctive corky girdles; Aulonemia prolifera, characterized, among other Brazilian congeners, by its fimbriate leaf sheaths; and Aulonemia soderstromii, with its conspicuous cluster of spreading fimbriae. These new species all propagate by amphipodial rhizomes, an unusual feature shared with the Brazilian species A. aristulata, with which they are morphologically compared. Comments about habitat, distribution, phenology, and conservation status for each species are provided, as well as photographs taken in the wild.

scholarly journals Seed dispersal and population structure in Vriesea gigantea, a bromeliad from the Brazilian Atlantic Rainforest

2010 ◽  
Vol 164 (3) ◽  
pp. 317-325 ◽  
Author(s):  
GECELE MATOS PAGGI ◽  
JAMILLA ALVES TRINDADE SAMPAIO ◽  
MANUELA BRUXEL ◽  
CAMILA MARTINI ZANELLA ◽  
MÁRCIA GÖETZE ◽  
...  
Keyword(s):  
Population Structure ◽  
Seed Dispersal ◽  
Atlantic Rainforest ◽  
Brazilian Atlantic Rainforest

Proteomics analysis of the germinating seeds of Cariniana legalis (Mart.) Kuntze (Meliaceae): an endangered species of the Brazilian Atlantic Rainforest

2017 ◽  
Vol 41 (1) ◽  
pp. 117-128
Author(s):  
Bianca Machado Campos Trindade ◽  
Ricardo Souza Reis ◽  
Ellen Moura Vale ◽  
Claudete Santa-Catarina ◽  
Vanildo Silveira
Keyword(s):  
Endangered Species ◽  
Atlantic Rainforest ◽  
Proteomics Analysis ◽  
Cariniana Legalis ◽  
Germinating Seeds ◽  
Brazilian Atlantic Rainforest

scholarly journals In vitro culture and acclimatization of Cattleya xanthina (Orchidaceae), an endangered orchid of the Brazilian Atlantic Rainforest

Rodriguésia ◽  
2019 ◽  
Vol 70 ◽  
Author(s):  
Monique Cristine R. Juras ◽  
Jackeline Jorge ◽  
Rosete Pescador ◽  
Wagner de Melo Ferreira ◽  
Vivian Tamaki ◽  
...  
Keyword(s):  
Photosynthetic Pigments ◽  
Total Protein ◽  
Culture Media ◽  
Atlantic Rainforest ◽  
Ms Medium ◽  
Ammonium Ions ◽  
Biometric Parameters ◽  
Half Strength ◽  
Brazilian Atlantic Rainforest

Abstract Cattleya xanthina is a Neotropical orchid endemic to the Brazilian Atlantic Rainforest, at high risk of extinction. In this paper, we investigated the effects of different culture media on C. xanthina as well as on their endogenous nitrogen status. Culture media studied: Knudson C (KC), Vacin and Went (VW), and Murashige and Skoog (MS), the latter used at two different concentration (full and half-strength; MS/2). After 180 days, plants were transferred to MS medium with different NAA and BA concentrations. In each treatment, biometric parameters were measured and the endogenous levels of photosynthetic pigments, total protein, nitrate and ammonium ions were quantified. Plants grown on KC medium had the lowest concentration of nitrogen but exhibited the greatest shoot development, production of photosynthetic pigments and total protein. Results of growth regulators showed that the highest concentration of auxin stimulated root development and the production of photosynthetic pigments, and that a higher concentration of cytokinin promoted protein synthesis and the development of shoots. Most successful acclimatization was obtained when a mixture of Sphagnum and Pinus bark was used as the substrate.

Sign in / Sign up

Export Citation Format

Share Document