scholarly journals Migration rate and genetic diversity of two Drosophila maculifrons (Duda, 1927) populations from Highland Araucaria Forest Fragments in Southern Brazil

2015 ◽  
Vol 75 (1) ◽  
pp. 254-255 ◽  
Author(s):  
DC. Silva ◽  
LPB. Machado ◽  
RP. Mateus
Keyword(s):  
Genetic Diversity ◽  
Migration Rate ◽  
Forest Fragments ◽  
Southern Brazil ◽  
Araucaria Forest

scholarly journals Metapopulation in bats of Southern Brazil

2012 ◽  
Vol 72 (3) ◽  
pp. 605-609 ◽  
Author(s):  
NR Reis ◽  
MN. Fregonezi ◽  
AL. Peracchi ◽  
BK. Rossaneis
Keyword(s):  
Genetic Diversity ◽  
Maximum Distance ◽  
Forest Fragments ◽  
Southern Brazil ◽  
Long Distance ◽  
Carollia Perspicillata ◽  
Probability Of Survival ◽  
Metal Rings ◽  
Artibeus Lituratus

The purpose was to show that displacements, promoters of genetic diversity in metapopulations, increase the probability of survival of bat species adapted to medium and long-distance flights. Samples were taken in four forest fragments, distributed in three municipalities in northern Paraná, and the maximum distance between the studied areas is 20 km. A monthly sampling was performed for each fragment, for the period of July 2008 to June 2009. We used eight nets for collection which remained open during the first four hours of the night, totalling 192 hours during a year of study. The marking occurred from October 2008 to March 2009 and was accomplished through the use of anodised metal rings of four different colours. One hundred and fifty individuals were banded and since the first capture, four displacements were recorded. After five months of collecting and marking, one Carollia perspicillata was found three km away. Two Artibeus lituratus were recorded about 20 km from the marking place: the first one after 22 months and the second one after 24 months. Additionally, one Platyrrhinus lineatus was captured at about 20 km, after 26 months. As they moved around over considerable distances and are not monogamous, they mate with females of other fragments, exchanging genes and reducing or even avoiding inbreeding. Thus, populations of bats have the ability to increase genetic diversity in metapopulations, provided by displacements between the forest fragments. Species that behave like this are not vulnerable to isolation.

scholarly journals Floristic composition and phytogeography of the tree component of Araucaria Forest fragments in southern Brazil

2012 ◽  
Vol 35 (2) ◽  
pp. 145-157 ◽  
Author(s):  
Pedro Higuchi ◽  
Ana Carolina da Silva ◽  
Tiago Sousa Ferreira ◽  
Sheila Trierveiler de Souza ◽  
Juliano Pereira Gomes ◽  
...  
Keyword(s):  
Floristic Composition ◽  
Forest Fragments ◽  
Southern Brazil ◽  
Araucaria Forest ◽  
Tree Component

scholarly journals Wood anatomical traits of the Araucaria Forest, Southern Brazil

2016 ◽  
Vol 37 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Patricia Soffiatti ◽  
Maria Regina Torres Boeger ◽  
Silvana Nisgoski ◽  
Felipe Kauai
Keyword(s):  
Southern Brazil ◽  
Araucaria Forest

scholarly journals Genetic diversity in populations of Maytenus dasyclada (Celastraceae) in forest reserves and unprotected Araucaria forest remnants

2017 ◽  
Vol 31 (1) ◽  
pp. 93-101 ◽  
Author(s):  
Manuel Castilhos Reichmann ◽  
Camila Ângela Zanella ◽  
Cláudio Valério Júnior ◽  
Ana Claudia Piovezan Borges ◽  
Tanise Luisa Sausen ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Forest Reserves ◽  
Araucaria Forest ◽  
Forest Remnants

scholarly journals Microsatellite genotyping from faeces of Lontra longicaudis from southern Brazil

2009 ◽  
Vol 99 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Laura I. Weber ◽  
Cintia G. Hildebrand ◽  
Anderson Ferreira ◽  
Gustavo Pedarassi ◽  
José A. Levy ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Conservation Status ◽  
Significant Degree ◽  
Southern Brazil ◽  
High Genetic Diversity ◽  
Low Degree ◽  
Faecal Samples ◽  
High Level ◽  
Degree Of Differentiation ◽  
Lontra Longicaudis

A genetic study of the neotropical river otter Lontra longicaudis (Olfers, 1818), which has an unknown conservation status, was carried out at the Taim Ecological Station and the margins of the Vargas stream, Rio Grande do Sul, southern Brazil. Faecal samples were collected, and DNA was extracted using a silica-guanidine method. Five microsatellite loci were amplified using PCR with heterologous primers previously described for Lutra lutra (Linnaeus, 1758). Sixteen faecal samples out of 29 from Taim and 11 out of 14 from Vargas stream margins contained enough DNA for genetic analysis. A total of 49 different alleles were found at both localities, from which 18 were exclusively found in individuals from Taim and 17 were exclusives from Vargas individuals. The most common allele was the same at both locations for three loci (Lut715, Lut733, and Lut818). A high level of genetic diversity was found at both sites (NeTaim=4.1, HoTaim=0.299, HeTaim=0.681; NeVargas=4.9, HoVargas=0.355, HeVargas=0.724), being higher at the Vargas stream site. A high and significant level of heterozygote deficiency was observed at most loci according to the χ2 test. The homogeneity χ2 test (P<0.001) showed that there were significant differences in the allele frequencies between the two locations. Genotyping for more than one locus was possible in 81.5% of samples, from which only 37% were possible to genotype for more than three loci. A low degree of relatedness was found among individuals from Taim (R=0.055±0.310), but an even lower value of relatedness was found at the Vargas site (R= -0.285±0.440). The significant degree of differentiation (I=0.890; F ST=0.059) found between Taim and Vargas individuals suggests that there is more than one population of otters in the southern extreme of Brazil, which probably are associated with the water body systems found in this region, the Mirim and the Caiuvá/Flores/Mangueira Lagoons. The high genetic diversity and low relatedness found at the Vargas stream, lead us to believe that the Vargas stream may be acting as a corridor between these water bodies for otter dispersion.

scholarly journals Gall-inducing insects of an Araucaria Forest in southern Brazil

2013 ◽  
Vol 57 (2) ◽  
pp. 225-233 ◽  
Author(s):  
Tiago Shizen Pacheco Toma ◽  
Milton de Souza Mendonça Júnior
Keyword(s):  
Southern Brazil ◽  
Araucaria Forest

scholarly journals Diversity of Odonata (Insecta) in Seasonal Deciduous Forest fragments in southern Brazil (state of Rio Grande do Sul), with a new record for the state and comments on the seasonal distribution of the species

2019 ◽  
Vol 19 (4) ◽  
Author(s):  
Mateus Marques Pires ◽  
Carla Bender Kotzian ◽  
Cleber Sganzerla ◽  
Gabriel Prass ◽  
Marina Schmidt Dalzochio ◽  
...  
Keyword(s):  
Deciduous Forest ◽  
Rio Grande ◽  
Seasonal Distribution ◽  
The State ◽  
Seasonal Patterns ◽  
Forest Fragments ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Farm Ponds ◽  
First Occurrence

Abstract: We present an Odonata (Insecta) check list of species occurring in a fragment of the Seasonal Deciduous Forest (Atlantic Forest biome) from the central region of the state of Rio Grande do Sul (RS), southern Brazil, along with a list of the odonate species recorded in this phytoecological region for the state. In addition, we provide comments on the seasonal distribution of the species occurring in the study area. Two streams and seven farm ponds located in the middle course of the Jacuí River basin were surveyed between December 2007 and February 2009. Overall, we recorded 49 species from 21 genera and six families. Argia serva Hagen in Selys, 1865 (Coenagrionidade) had its first occurrence record mentioned for the state, elevating to 183 the total number of Odonata species occurring in Rio Grande do Sul. The number of species recorded in the study area corresponds to ~26% of the known Odonata diversity in RS. Libellulidae was the most species-rich family (22 species, ~45% of the total), followed by Coenagrionidae (18 species, 37% of the total). The checklist for the Seasonal Deciduous Forest in RS indicated the occurrence of 83 species of Odonata in this phytoecological region (~45% of the known odonate species in the state). This elevated diversity could be related to the density of the vegetation structure. In the study area, 20 species were found in streams, and 45 in farm ponds. Species occurrence showed marked seasonal patterns in the study area, with 88% of the species recorded from summer to autumn, and no species detected in streams in the winter. Moreover, 70% of the species were recorded in either one or two seasons in farm ponds, while 65% occurred solely in one season in streams. This result indicates that the life cycle of Odonata in southern Brazil is strongly influenced by seasonal patterns in temperature.

Trophic niche of two sympatric frugivorous bat species in a periurban area of southern Brazil

Mammalia ◽  
2013 ◽  
Vol 77 (2) ◽  
Author(s):  
Eduardo Ribeiro Sartore ◽  
Nelio Roberto dos Reis
Keyword(s):  
Urban Areas ◽  
Trophic Niche ◽  
Forest Fragments ◽  
Southern Brazil

AbstractSeveral species of bats inhabit forest fragments near urban areas.

Leaf architecture of terrestrial and epiphytic ferns from an Araucaria forest in southern Brazil

Botany ◽  
2013 ◽  
Vol 91 (11) ◽  
pp. 768-773 ◽  
Author(s):  
L. Larcher ◽  
M.R.T. Boeger ◽  
P. Soffiatti ◽  
T.I. Da Silveira
Keyword(s):  
Plant Architecture ◽  
Mechanical Design ◽  
Light Interception ◽  
Leaf Position ◽  
Southern Brazil ◽  
Leaf Architecture ◽  
Leaf Form ◽  
Araucaria Forest ◽  
Maximum Light ◽  
Rigid Structure

Studies of angiosperms have associated the mechanical design of petioles with leaf form and the occurrence of simple and compound leaves. Petiole anatomy can respond differently, according to different leaf forms, to maintain plant architecture. The present study evaluated whether this premise applies to fern leaf architecture. Leaves of five ferns (Blechnum binervatum (Poir.) C.V. Morton & Lellinger, Ctenitis falciculata (Raddi) Ching, Megalastrum connexum (Kaulf.) A.R. Smith & R.C. Moran, Microgramma squamulosa (Kaulf.) de la Sota, and Serpocaulon catharinae (Langsd. & Fisch.) A.R. Sm.) from a remnant of an Araucaria Forest in southern Brazil were collected and their morphological and anatomical traits were analyzed. Results indicate that the biomechanical patterns of these terrestrial and epiphytic ferns are similar to those reported for angiosperms, except for the presence of subepidermal sclerenchyma in fern petioles. Independently of leaf form, the rigid structure of fern petioles appears to be an important adaptation to biomechanically support leaf position for maximum light interception in forest understories.

Sign in / Sign up

Export Citation Format

Share Document