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Peruvian Amazonia (peruvian + amazonia)

Distribution by Scientific Domains
Life Sciences100%

Selected Abstracts

The Chinese Timber Trade and the Logging of Peruvian Amazonia

CONSERVATION BIOLOGY, Issue 6 2008
LOUIS PUTZEL
No abstract is available for this article. [source]

High local species richness of parasitic wasps (Hymenoptera: Ichneumonidae; Pimplinae and Rhyssinae) from the lowland rainforests of Peruvian Amazonia

ECOLOGICAL ENTOMOLOGY, Issue 6 2004
Ilari E. Sääksjärvi
Abstract., 1. The parasitic wasp family Ichneumonidae (Hymenoptera) is of great interest because it has been claimed that its species richness does not increase with decreasing latitude. 2. No extensive studies of the family have been conducted in South American localities. 3. Arthropods were sampled using 27 Malaise traps in the Allpahuayo,Mishana National Reserve (56 000 ha) in the north-eastern Peruvian Amazonian lowland rainforest. The total duration of the sampling programme was 185 Malaise trap months. 4. Altogether, 88 species were collected. This is one of the highest local pimpline and rhyssine species numbers ever recorded. A comparison with results from Mesoamerica revealed that at equal numbers of individuals sampled, the number of Pimplinae and Rhyssinae species in Peruvian Amazonia is at least twofold compared with lowland locations in Mesoamerica and somewhat higher than in the most species-rich Costa Rican higher altitude localities. 5. Non-parametric methods of estimating species richness were applied. These suggest that additional sampling would yield a considerable number of new Pimplinae and/or Rhyssinae species. [source]

Geographic distribution and demography of Pithecia aequatorialis (pitheciidae) in Peruvian Amazonia

AMERICAN JOURNAL OF PRIMATOLOGY, Issue 12 2009
Rolando Aquino
Abstract To study the geographic distribution and demographic characteristics of Pithecia aequatorialis in Peruvian Amazonia, we undertook surveys and transect census in three river basins (Río Itaya, Río Tigre and Río Curaray) between 2004 and 2008. A total of 123 groups of P. aequatorialis was encountered during 1623,km of transect walks. Group size was uniform among the three areas (3.4,3.6 individuals), but surprisingly, population densities were higher in the area with strong hunting pressure (Río Itaya: 7.8,ind./km2, vs. 5.6 and 5.9,km2 in the Río Tigre and Río Curaray basins, respectively). The most common group composition included an adult pair with one offspring. Groups with more than one adult male and/or female accounted for 35% of sightings. Our observations extend P. aequatorialis range in Peru further south to the area between the Río Tigre and Río Corrientes, but exclude the area to the north between the Río Curaray and Río Napo. These findings are in contrast to previous distribution maps. P. aequatorialis was rarely seen in interspecific association during our censuses. Am. J. Primatol. 71:964,968, 2009. © 2009 Wiley-Liss, Inc. [source]

Riqueza y Distribución Ecológica de Especies de Pteridofitas en la Zona del Río Yavarí-Mirín, Amazonía Peruana

BIOTROPICA, Issue 5 2007
Glenda G. Cárdenas
ABSTRACT We studied the ecological distribution of pteridophytes (ferns and fern allies) along eight 8-km transects covering 12.7 ha in Peruvian Amazonia. Subunits of 200 m2 of the transects have previously been classified into four different forest types, and here we document and quantify the floristic differences among these forest types. Pteridophytes have been suggested as an indicator group to classify rain forest habitats, but this requires that the ecological preferences of the species are well documented and consistent across geographic regions. Here we analyzed in detail the distribution and diversity patterns of 130 species across the four rain forest types. Relative species abundance and species diversity were similar among some of the forest types and differed among others, but the species composition differed markedly. Our results largely confirmed the earlier interpretation of the edaphic preferences of the pteridophyte species in western Amazonia. This supports the proposition that deterministic processes have an important role in influencing the floristic composition of Amazonian forests. RESUMEN Estudiamos la distribución ecológica de las pteridofitas (helechos y plantas afines) a lo largo de ocho transectos de 8 km cada uno, cubriendo un área total de 12.7 ha en la Amazonía peruana. Subunidades de 200 m2 de los transectos fueron anteriormente clasificadas en cuatro tipos diferentes de bosques, y aquí documentamos y cuantificamos las diferencias florísticas entre estos tipos de bosques. Las pteridofitas han sido recomendadas como un grupo indicador para clasificar los hábitat del bosque húmedo tropical, pero esto requiere que las preferencias ecológicas de las especies sean bien documentadas y consistentes a través de las regiones geográficas. Aquí analizamos en detalle los patrones de distribución y diversidad de 130 especies a través de los cuatro tipos de bosques. La abundancia relativa y la diversidad de especies fueron similares entre algunos de los tipos de bosque y diferentes entre otros, pero la composición florística difirió marcadamente. Nuestros resultados confirmaron en gran parte la previa interpretación de las preferencias edáficas de las especies de pteridofitas en la Amazonía occidental. Esto apoya la propuesta de que procesos deterministas influyen de manera importante en la composición florística de los bosques amazónicos. [source]