12 documents found, page 1 of 2
Mites (arachnida, acari) on citrus sinensis l. osbeck orange trees in the state...
Encarnação Bobot, Teiamar da; Franklin, E.; Navia, Denise; Gasnier, Thierry Ray Jehlen; Lofego, Antônio Carlos; Oliveira, Byatryz Mortágua deDespite the importance of citriculture in Brazil, very little is known about mite populations in citrus crops in the Northern Region. In the municipality of Manaus, 12 sprayed sweet orange orchards were surveyed every two weeks during seven months to record mite species amount, and to describe the abundance and distribution of the most important species. The size and age of the orchards varied from 3,360 to 88,...
Edaphic and arboricolous oribatid mites (Acari; Oribatida) in tropical environm...
Franklin, E.; Santos, Evanira M.R.; Albuquerque, M. I.C.We analysed the community of oribatid mites in 25 environments of northern Brazil and one in a rain forest in Peru, encompassing fauna sampled on natural and artificial (nylon-mesh bags) substrata, from primary and secondary forests, caatinga, savannahs, flooded forests, bark and epiphytes of trees, and polyculture. A hundred and forty six species are definitively identified from a total of 444 taxa. To determi...
Efficiency in inventories of ants in a forest reserve in central Amazonia
Souza, Jorge Luiz Pereira; Moura, Carlos Alberto Ribeiro de; Franklin, E.The objective of this work was to evaluate an inventory method efficiency for ants. We used subsamples collected in 24 transects of 100 m, distributed in 6 plots of 600 ha each in primary forest, as part of a long-term project. Ten litter subsamples were extracted per transect using Winkler extractors. Ants were identified to genus level, and Crematogaster, Gnamptogenys and Pachycondyla genera to species/morpho...
Ant species distribution along a topographic gradient in a "terra-firme" forest...
Oliveira, Pollyana Yvonica de; Souza, Jorge Luiz Pereira; Baccaro, Fabricio Beggiato; Franklin, E.In Amazonia, topographical variations in soil and forest structure within "terra-firme" ecosystems are important factors correlated with terrestrial invertebrates' distribution. The objective of this work was to assess the effects of soil clay content and slope on ant species distribution over a 25 km2 grid covering the natural topographic continuum. Using three complementary sampling methods (sardine baits, pi...
Oribatid mite (Acari: Oribatida) contribution to decomposition dynamic of leaf ...
Franklin, E.; Hayek, T.; Fagundes, E. P.; Silva, L. L.We studied the contribution of oribatid mites in the dynamics of litter decomposition in an experiment using litterbags of three different mesh sizes (20 microns, 250 microns, and 1 cm). The experiment was carried out at a primary forest (FLO), a secondary forest (SEC), and at two polyculture systems (POA and POC). We compared the weight loss of the leaves of Vismia guianensis and the changes of the oribatid mi...
Edaphic oribatid mites in two floodplain forests of central Amazonia: vertical ...
Franklin, E.; Schubart, R.; Adis, Joachim U.Populations of oribatid mites (Acari: Oribatida) were studied in two sites of periodically inundated forests in central Amazonia: one situated in a seasonal igapo-forest, flooded by black- water and a other situated in a seasonal varzea-forest, flooded by white water. Collections were made during the terrestrial phase using the Kempson extraction. Between 0-3,5 cm of soil depth, the ecological indices, density ...
Diversity and distribution of oribatid mites (Acari:Oribatida) in a lowland rai...
Franklin, E.; Santos, Evanira M.R.; Albuquerque, M. I.C.We are summarizing the current state of knowledge of the diversity and distribution of oribatid mites in 26 environments in northern Brazil and of a rain forest in Peru. The published studies were mostly concentrated in Central Amazon. Only one report is a result from an agricultural polyculture. We are providing the first lists of species for savannas and for the Brazilian states of Roraima and Pará. Up to dat...
A medium-spatial scale distribution pattern of pseudoscorpionida (arachnida) in...
Aguiar, Nair Otaviano; Gualberto, Tomaz L.; Franklin, E.In Amazonia, nothing is known about the distribution of the invertebrates on a medium-spatial scale pattern. In a trail system of 64 km2 at Ducke Reserve, we sampled 72 transects using the hand-sorting method and Berlese-Tullgren extraction. The reserve possesses ecosystems of "terra-firme" forest and the trail system represents a gradient of topographic soil factors and vegetation, avoiding categorizations. Co...
A comparison between time of exposure, number of pitfall traps and the sampling...
Gomes, C. B.; Souza, Jorge Luiz Pereira; Franklin, E.Using effective survey protocols to address the effects of environmental change are key to saving time, resources and costs. Although exhaustive sampling in any location has been shown as impractical, biodiversity sampling projects must capture sufficient information to show how species assemblages change with the environmental variables. This study investigated time of exposure in the field and the number of p...
Defining a termite sampling protocol for ecological studies: An effective metho...
Sales Dambros, Cristian de; Morais, José Wellington de; Vasconcellos, Alexandre; Franklin, E.Protocols for sampling soil fauna are usually designed to increase the number of species found when one or a few plots are heavily sampled. However, no previous study has evaluated how the number of plots sampled affect the power of statistical tests associating community composition and the environment. We test the effect of the number of transects (plots) and the sampling effort in each transect on the repres...