scholarly journals Aquatic oligochaetes associated with bryophytes in an Atlantic Forest stream

2013 ◽  
Vol 13 (4) ◽  
pp. 371-375 ◽  
Author(s):  
Luciana Falci Theza Rodrigues ◽  
Lucas Deziderio Santana ◽  
Roberto da Gama Alves
Keyword(s):  
Water Flow ◽  
Atlantic Forest ◽  
Benthic Macroinvertebrates ◽  
Dry Season ◽  
Forest Fragment ◽  
Order Stream ◽  
First Order ◽  
Aquatic Oligochaetes ◽  
Forest Stream ◽  
Dry And Rainy Seasons

There are few reports in the literature about the colonization of benthic macroinvertebrates on bryophytes. The aim of the present study was to analyzed the oligochaetes established on bryophytes adhered to stones in a first-order stream. The collections were carried out in an Atlantic Forest fragment area during the dry and rainy seasons. We identified 15 taxa from a total of 422 oligochaetes specimens, of which the most abundant were Pristina sp.1, Enchytraeidae and Pristina jenkinae. Unlike other habitats, where the abundance of macroinvertebrates tends to be greater in the dry season, we did not find any significant differences in the abundance, richness, composition and diversity between the two periods. The results of this study indicate that bryophytes are possible areas of refuge for oligochaetes in periods of faster water flow.

scholarly journals Community of Aquatic Macroinvertebrates in an Atlantic Forest Stream, Brazil

2012 ◽  
Vol 5 (3) ◽  
pp. 179-184
Author(s):  
Rafael Santos de Azevedo ◽  
Leandro Dumas ◽  
Daniela Rodrigues ◽  
Carla Ferreira Rezende ◽  
Érica Pellegrini Caramaschi ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Benthic Macroinvertebrates ◽  
Rio De Janeiro ◽  
Aquatic Macroinvertebrates ◽  
Environmental Data ◽  
Mato Grosso ◽  
Mata Atlântica ◽  
Forest Stream ◽  
Density Values ◽  
Low Altitude

Composition, diversity and density of benthic macroinvertebrates were described based on samples from the four different sites of Rio Mato Grosso, Saquarema, Rio de Janeiro. Biotic and environmental data were obtained in January 2006 in microhabitats with different substrates. A total of 5.605 specimens of the 28 insect families and two crustaceous families are sampled. The lowest values of richness, diversity, equitability and density were observed in low altitude sites. The highest diversity and density values were observed in litter substrate, while sand substrate showed lower values of these parameters. Estrutura da Comunidade de Macroinvertebrados Aquáticos de um Riacho de Mata Atlântica, Brasil Resumo. A composição, diversidade e densidade de macroinvertebrados bentônicos foram descritas a partir de amostras provenientes de quatro localidades distintas do Rio Mato Grosso, Saquarema, Rio de Janeiro. Os dados bióticos e abióticos foram obtidos em janeiro 2006 em microhabitats com diferentes tipos de substrato. Foi amostrado um total de 5.605 espécimes de 28 famílias de insetos e duas de crustáceos. Os menores valores de riqueza, diversidade, equitabilidade e densidade foram registrados nas localidades de menor altitude. Folhiço foi o substrato com maiores valores de diversidade e densidade, enquanto areia apresentou os menores valores desses parâmetros.

scholarly journals Macroinvertebrates associated with bryophyta in a first-order Atlantic Forest stream

2011 ◽  
Vol 28 (3) ◽  
pp. 351-356 ◽  
Author(s):  
Beatriz F. J. V. Rosa ◽  
Marcos V. D. da Silva ◽  
Vívian C. de Oliveira ◽  
Renato T. Martins ◽  
Roberto da G. Alves
Keyword(s):  
Atlantic Forest ◽  
First Order ◽  
Forest Stream

scholarly journals Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream

2013 ◽  
Vol 86 (3) ◽  
pp. 291-300 ◽  
Author(s):  
BEATRIZ F. J. V ROSA ◽  
MONIQUE VASQUES ◽  
ROBERTO G ALVES
Keyword(s):  
Atlantic Forest ◽  
First Order ◽  
Forest Stream

scholarly journals Phoretic association between larvae of Rheotanytarsus (Diptera: Chironomidae) and genera of Odonata in a first-order stream in an area of Atlantic Forest in southeastern Brazil

2009 ◽  
Vol 26 (4) ◽  
pp. 787-791 ◽  
Author(s):  
Beatriz F. J. Vescovi Rosa ◽  
Renato T. Martins ◽  
Vívian C. de Oliveira ◽  
Roberto da G. Alves
Keyword(s):  
Atlantic Forest ◽  
Southeastern Brazil ◽  
Order Stream ◽  
First Order

Description of larva and pupa of Phylloicus cressae Prather 2003 (Trichoptera: Calamoceratidae) from a montane forest stream in the peri-urban area of Caracas, Venezuela

Zootaxa ◽  
2020 ◽  
Vol 4768 (4) ◽  
pp. 579-588
Author(s):  
MARGENNY C. BARRIOS ◽  
MARÍA D. MENDOZA ◽  
JOSÉ V. MONTOYA
Keyword(s):  
Urban Area ◽  
Adult Stage ◽  
Montane Forest ◽  
Order Stream ◽  
River Watershed ◽  
First Order ◽  
Forest Stream

Phylloicus is the most species-rich genus of the Neotropical Calamoceratidae. In Venezuela, twelve species are known from the adult stage and, from those, only one has its larval and pupal stages described. Here, we describe and illustrate the larva, pupa, and case of Phylloicus cressae, from a first order stream of the heavily disturbed Tuy River watershed in the peri-urban area of Caracas, northcentral Venezuela. 

scholarly journals Benthic macrofauna and the limnological parameters of a first-order stream in Atlantic Forest of Brazilian Northeast

2014 ◽  
Vol 26 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Janaina Câmara Siqueira da Cunha ◽  
Renato Galindo de Barros Filho ◽  
Rafael Pereira da Silva ◽  
Iris Gabrielly Arruda dos Santos ◽  
Gilberto Gonçalves Rodrigues
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Atlantic Forest ◽  
Ph Value ◽  
Sampling Effort ◽  
Order Stream ◽  
First Order ◽  
Structural Variables ◽  
Limnological Parameters

AIM: The present study aimed to elucidate if the water physical and chemical parameters from a first order stream of Biological Reserve of Saltinho from south Pernambuco induces in the distribution and abundance of benthic macroinvertebrates. METHODS: Both limnological parameters (pH-value, electrical conductivity, water temperature, turbidity, salinity and dissolved oxygen) and structural variables of aquatic habitat (substrate, food availability and flow velocity) influence the macroinvertebrates community structure. The creek is very small, with an approximate width of 1-3 m and a depth of 0.5 m. It was used a Surber sampler (100 mm) in three stretch of the creek, each one with two sampling units (s.u.) totaling six s.u. distant 50 m, with a sampling effort of five minutes per s.u.. The measurer multiparameter was used in order to obtain the water analysis (limnological parameters). RESULTS: From 11 taxa of macroinvertebrates found no significant correlation (p<0.05) was presented with pH-value, water temperature and salinity, but some taxa showed with electrical conductivity (EC), turbidity (TD) and dissolved oxygen (DO). Hemiptera abundance increases with decreasing DO; Ostracoda abundance increases with increasing EC and TD and the decrease in DO; and Trichoptera abundance increases with the decrease in EC and TD and the increase in DO. The stretches exhibited similarity in relation to the richness and abundance of macroinvertebrates and limnological parameters. The macroinvertebrates distribution in the stream not showed the same pattern, grouping s.u. of different stretch, because the habitat structural variables influenced the distribution. CONCLUSIONS: Therefore, the macroinvertebrates community varies according to abiotic factors in different limnological and structural parameters. This study is the first record of a work that associates benthic fauna and abiotic parameters at the Atlantic forest of Pernambuco.

Relation between environmental variables and aquatic megafauna in a first order stream of the Atlantic Forest, southern Brazil

Hydrobiologia ◽  
2004 ◽  
Vol 528 (1-3) ◽  
pp. 17-30 ◽  
Author(s):  
F�bio Vilella ◽  
Fernando Becker ◽  
Sandra Hartz ◽  
Geraldo Barbieri
Keyword(s):  
Atlantic Forest ◽  
Environmental Variables ◽  
Southern Brazil ◽  
Order Stream ◽  
First Order

STUDI BIONOMIK VEKTOR MALARIA DI KECAMATAN KALIBAWANG, KULONPROGO

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Sardjito Eko Windarso dkk
Keyword(s):  
Land Use ◽  
Malaria Vector ◽  
Rainy Season ◽  
Dry Season ◽  
Physical Factors ◽  
Mosquito Vector ◽  
Anopheles Species ◽  
Commercial Farming ◽  
Study Results ◽  
Dry And Rainy Seasons

The increasing of malaria cases in recent years at Kecamatan Kalibawang has been suspected correspond with the conversion of farming land-use which initiated in 1993. Four years after the natural vegetation in this area were changed become cocoa and coffee commercial farming estates, the number of malaria cases in 1997 rose more than six times, and in 2000 it reached 6085. This study were aimed to observe whether there were any differences in density and diversity of Anopheles as malaria vector between the cocoa and mix farming during dry and rainy seasons. The results of the study are useful for considering the appropriate methods, times and places for mosquito vector controlling. The study activities comprised of collecting Anopheles as well as identifying the species to determine the density and diversity of the malaria vector. Both activities were held four weeks in dry season and four weeks in rainy season. The mea-surement of physical factors such as temperature, humidity and rainfall were also conducted to support the study results. Four dusuns which meet the criteria and had the highest malaria cases were selected as study location. Descriptively, the results shows that the number of collected Anopheles in cocoa farming were higher compared with those in mix horticultural farming; and the number of Anopheles species identifi ed in cocoa farming were also more varied than those in the mix horticultural farming.Key words: bionomik vektor malaria, anopheles,

scholarly journals Small mammal glucocorticoid concentrations vary with forest fragment size, trap type, and mammal taxa in the Interior Atlantic Forest

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sarah A. Boyle ◽  
Noé U. de la Sancha ◽  
Pastor Pérez ◽  
David Kabelik
Keyword(s):  
Atlantic Forest ◽  
Small Mammals ◽  
Acute Stress ◽  
Physiological Stress ◽  
Fragment Size ◽  
Hair Shaft ◽  
Forest Fragments ◽  
Forest Fragment ◽  
Trapping Methods ◽  
Free Ranging

AbstractSpecies that live in degraded habitats often show signs of physiological stress. Glucocorticoid hormones (e.g., corticosterone and cortisol) are often assessed as a proxy of the extent of physiological stress an animal has experienced. Our goal was to quantify glucocorticoids in free-ranging small mammals in fragments of Interior Atlantic Forest. We extracted glucocorticoids from fur samples of 106 small mammals (rodent genera Akodon and Oligoryzomys, and marsupial genera Gracilinanus and Marmosa) from six forest fragments (2–1200 ha) in the Reserva Natural Tapytá, Caazapá Department, Paraguay. To our knowledge, this is the first publication of corticosterone and cortisol levels for three of the four sampled genera (Akodon, Oligoryzomys, and Marmosa) in this forest system. We discovered three notable results. First, as predicted, glucocorticoid levels were higher in individuals living withing small forest fragments. Second, animals captured live using restraint trapping methods (Sherman traps) had higher glucocorticoid levels than those animals captured using kill traps (Victor traps), suggesting that hair glucocorticoid measures can reflect acute stress levels in addition to long-term glucocorticoid incorporation. These acute levels are likely due to urinary steroids diffusing into the hair shaft. This finding raises a concern about the use of certain trapping techniques in association with fur hormone analysis. Finally, as expected, we also detected genus-specific differences in glucocorticoid levels, as well as cortisol/corticosterone ratios.

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