Search results for "mites"
showing 10 items of 108 documents
Distribution patterns of epiphytic reed-associated macroinvertebrate communities across European shallow lakes
2021
So far, research on plant-associated macroinvertebrates, even if conducted on a large number of water bodies, has mostly focused on a relatively small area, permitting limited conclusions to be drawn regarding potentially broader geographic effects, including climate. Some recent studies have shown that the composition of epiphytic communities may differ considerably among climatic zones. To assess this phenomenon, we studied macroinvertebrates associated with the common reed Phragmites australis (Cav.) Trin. ex Steud in 46 shallow lakes using a common protocol. The lakes, located in nine countries, covered almost the entire European latitudinal range (from <48°N to 61°N) and captured much …
Presentación: La razón de un rodeo
1981
Un análisis estructuralista presentado por Vidal Beneyto
1981
Reseña sobre el libro "Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía", que coordina Vidal-Beneyto. Referencia completa: Vidal-Beneyto, José (Ed.) (1981). Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía. Madrid: Editora Nacional, Cultura y Sociedad.
Vidal Beneyto (Comp.) (1981). Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía. Madrid: Edit…
1981
Reseña sobre el libro "Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía", que coordina Vidal-Beneyto. Referencia completa: Vidal-Beneyto, José (Ed.) (1981). Posibilidades y límites del análisis estructural: una investigación concreta en torno a lenguaje y poesía. Madrid: Editora Nacional, Cultura y Sociedad.
Behaviour of common estimators in dynamic error-components models with autocorrelated disturbances
1997
The purpose of this paper is to make a presentation of the properties of a set of estimators comprising the within, between, OLS and GLS estimators in the study of dynamic error - components models with autocorrelated disturbances. We underline in this study the importance of the statistical distribution governing the initial values for the process and the structure of xit variable for the limiting values of the estimators when the temporal dimension is fixed but the individual dimension N grows indefinitly.
Occurrence of rhizobia in the gut of the higher termite Nasutitermes nigriceps
2006
Wood-eating termites feed on a diet highly deficient in nitrogen. They must complement their diet with the aid of nitrogen-fixing bacteria. Nitrogen fixation in the gut has been demonstrated, but information about nitrogen-fixing bacteria in pure culture is scarce. From the higher termite Nasutitermes nigriceps the symbiotic bacterial strain M3A was isolated, which thrives in the hindgut contents. The Gram-negative strain exhibited similarities to the species of the genus Ensifer (including Sinorhizobium) on the basis of morphological and physiological/biochemical features. The 16S rRNA gene analysis showed the highest sequence similarity of the isolate M3A to Ensifer adhaerens (>99%; ATCC …
Characterization of microbial communities in pest colonized books by molecular biology tools
2011
This work presents the identification of bacteria and fungi colonies in insect infesting books, by cultural-independent methodologies based on molecular biology techniques. Microbial genomic DNA extraction,<em> in vitro</em> amplification of specific target sequences by polymerase chain reactions (PCR), sequencing and sequence analysis were performed. These procedures minimized the samples amount, optimized the diagnostic studies on bacteria and fungi colonization and allowed the identification of many species also in complex microbial consortia. The molecular techniques for sure accomplish and integrate the microbiological standard methods (<em>in vitro</em>&nbs…
The Oblivion of Demography in Sustainability’s Studies
2017
[RESUMEN] A lo largo de la historia del Homo sapiens, su número se ha mantenido muy reducido y hubo que esperar a principios del siglo XIX para que alcanzara los mil millones. Se inició entonces un rápido crecimiento y durante el siglo XX la población mundial casi se cuadriplicó, superando los 6000 millones, lo que llevó a estudiar, con lógica preocupación, los posibles efectos de esta explosión demográfica sobre el conjunto de la biosfera y sobre la propia especie humana. Hoy, sin embargo, cuando se han sobrepasado los 7500 millones y la población mundial sigue aumentando en unos 80 millones cada año, la problemática demográfica ha dejado de tener una presencia relevante en los estudios y …
Lacustrine sedimentation in the diapir-controlled Miocene Bicorb Basin, Eastern Spain
1998
The Miocene Bicorb Basin is a small elongated basin developed by normal faulting of a thick Jurassic–Cretaceous carbonate succession and subsequent diapirism of Upper Triassic mudstones and evaporites. The basin fill comprises a sequence over 650 m thick formed by two units. The lower, alluvial unit consists of a complex alternation of conglomerates, sandstones, mudstones, and minor lacustrine limestones. The upper unit comprises marginal alluvial and lacustrine deposits in which seven lacustrine facies associations have been distinguished. The inner lacustrine deposits comprise mudstones and carbonates with minor evaporitic deposits. At the northeast and southwest basin edges, alluvial inp…