6 research outputs found
Aplicación de la energía solar transformada en energía eléctrica en el tratamiento de la biocorrosión por bacterias sulfooxidantes y ferroxidantes en acero de bajo carbono sumergido en agua
En el presente trabajo de investigación, se transformó la energía solar en energía eléctrica y se estudió la influencia de la intensidad de corriente eléctrica en el índice de morbilidad de bacterias sulfoxidantes y ferroxidantes en el potencial de protección y del Acero ASTM A-36 recubierto catódicamente con corriente continua, sumergido en agua dulce. En la recolección de datos se sumergieron en agua dulce, protegiendo catódicamente con corriente continua, muestras de Acero ASTM A-36, de 120 x 50 x 1,27 milímetros, por un periodo de tiempo de 120 horas. La determinación del índice de morbilidad de bacterias y la velocidad de corrosión se realizó por métodos gravimétricos (pérdida de peso). Al observar los datos finales, se determinó que el Acero ASTM A-36, sumergido en agua dulce, requiere para su protección efectiva contra la biocorrosión de una intensidad de corriente eléctrica debe fluctuar entre 0.5 a 1.5 mA/m2, con lo cual se logró evaluar que la cantidad de corriente eléctrica emitida a las placas de acero ASTM A-36 más idónea para la eliminación de bacterias corrosivas fue de 0.5 mA/ m2 Lo propuesto confirma que la protección catódica con corriente aplicada, es fundamental, pues nos permite llevar la estructura a sistemas termodinámicas de inmunidad y utilizando la energía solar transformada en corriente eléctrica ayudamos al medio ambiente. Sin embargo, no se debe aplicar demasiada corriente eléctrica por los peligros de daño por hidrógeno que genera una sobreprotección
Estimating the global conservation status of more than 15,000 Amazonian tree species
Estimates of extinction risk for Amazonian plant and animal species are rare and not often incorporated into land-use policy and conservation planning. We overlay spatial distribution models with historical and projected deforestation to show that at least 36% and up to 57% of all Amazonian tree species are likely to qualify as globally threatened under International Union for Conservation of Nature (IUCN) Red List criteria. If confirmed, these results would increase the number of threatened plant species on Earth by 22%. We show that the trends observed in Amazonia apply to trees throughout the tropics, and we predict thatmost of the world’s >40,000 tropical tree species now qualify as globally threatened. A gap analysis suggests that existing Amazonian protected areas and indigenous territories will protect viable populations of most threatened species if these areas suffer no further degradation, highlighting the key roles that protected areas, indigenous peoples, and improved governance can play in preventing large-scale extinctions in the tropics in this century
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Incorporating phylogenetic information for the definition of floristic districts in hyperdiverse Amazon forests: Implications for conservation
Using complementary metrics to evaluate phylogenetic diversity can facilitate the delimitation of floristic units and conservation priority areas. In this study, we describe the spatial patterns of phylogenetic alpha and beta diversity, phylogenetic endemism, and evolutionary distinctiveness of the hyperdiverse Ecuador Amazon forests and define priority areas for conservation. We established a network of 62 one‐hectare plots in terra firme forests of Ecuadorian Amazon. In these plots, we tagged, collected, and identified every single adult tree with dbh ≥10 cm. These data were combined with a regional community phylogenetic tree to calculate different phylogenetic diversity (PD) metrics in order to create spatial models. We used Loess regression to estimate the spatial variation of taxonomic and phylogenetic beta diversity as well as phylogenetic endemism and evolutionary distinctiveness. We found evidence for the definition of three floristic districts in the Ecuadorian Amazon, supported by both taxonomic and phylogenetic diversity data. Areas with high levels of phylogenetic endemism and evolutionary distinctiveness in Ecuadorian Amazon forests are unprotected. Furthermore, these areas are severely threatened by proposed plans of oil and mining extraction at large scales and should be prioritized in conservation planning for this region
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Incorporating phylogenetic information for the definition of floristic districts in hyperdiverse Amazon forests: Implications for conservation
Using complementary metrics to evaluate phylogenetic diversity can facilitate the delimitation of floristic units and conservation priority areas. In this study, we describe the spatial patterns of phylogenetic alpha and beta diversity, phylogenetic endemism, and evolutionary distinctiveness of the hyperdiverse Ecuador Amazon forests and define priority areas for conservation. We established a network of 62 one‐hectare plots in terra firme forests of Ecuadorian Amazon. In these plots, we tagged, collected, and identified every single adult tree with dbh ≥10 cm. These data were combined with a regional community phylogenetic tree to calculate different phylogenetic diversity (PD) metrics in order to create spatial models. We used Loess regression to estimate the spatial variation of taxonomic and phylogenetic beta diversity as well as phylogenetic endemism and evolutionary distinctiveness. We found evidence for the definition of three floristic districts in the Ecuadorian Amazon, supported by both taxonomic and phylogenetic diversity data. Areas with high levels of phylogenetic endemism and evolutionary distinctiveness in Ecuadorian Amazon forests are unprotected. Furthermore, these areas are severely threatened by proposed plans of oil and mining extraction at large scales and should be prioritized in conservation planning for this region
Recommended from our members
Incorporating phylogenetic information for the definition of floristic districts in hyperdiverse Amazon forests: Implications for conservation
Using complementary metrics to evaluate phylogenetic diversity can facilitate the delimitation of floristic units and conservation priority areas. In this study, we describe the spatial patterns of phylogenetic alpha and beta diversity, phylogenetic endemism, and evolutionary distinctiveness of the hyperdiverse Ecuador Amazon forests and define priority areas for conservation. We established a network of 62 one-hectare plots in terra firme forests of Ecuadorian Amazon. In these plots, we tagged, collected, and identified every single adult tree with dbh ≥10 cm. These data were combined with a regional community phylogenetic tree to calculate different phylogenetic diversity (PD) metrics in order to create spatial models. We used Loess regression to estimate the spatial variation of taxonomic and phylogenetic beta diversity as well as phylogenetic endemism and evolutionary distinctiveness. We found evidence for the definition of three floristic districts in the Ecuadorian Amazon, supported by both taxonomic and phylogenetic diversity data. Areas with high levels of phylogenetic endemism and evolutionary distinctiveness in Ecuadorian Amazon forests are unprotected. Furthermore, these areas are severely threatened by proposed plans of oil and mining extraction at large scales and should be prioritized in conservation planning for this region