Search results for "Adapta"

Nonlinear Time-Series Adaptation for Land Cover Classification

2017

Automatic land cover classification from satellite image time series is of paramount relevance to assess vegetation and crop status, with important implications in agriculture, biofuels, and food. However, due to the high cost and human resources needed to characterize and classify land cover through field campaigns, a recurrent limiting factor is the lack of available labeled data. On top of this, the biophysical–geophysical variables exhibit particular temporal structures that need to be exploited. Land cover classification based on image time series is very complex because of the data manifold distortions through time. We propose the use of the kernel manifold alignment (KEMA) method for…

Language in globalized interactive business : adaptation versus standardization

2017

Respostas e adaptações de comunidades de colêmbolos (Hexapoda: Collembola) a condições de inundação e hipoxia

2009

Standard ecological methods (pitfall traps, trunk eclectors and soil cores) were used to evaluate collembolan community responses to different flooding intensities. Three sites of a floodplain habitat near Mainz, Germany, with different flooding regimes were investigated. The structures of collembolan communities are markedly different depending on flooding intensity. Sites more affected by flooding are dominated by hygrophilic and hygrotolerant species, whereas the hardwood floodplain is dominated by mesophilic species. The survival strategies of the hygrophilic and hygrotolerant species include egg diapause and passive drifting. The physiological adaptations to hypoxic conditions of sever…

Didáctica de las ciencias experimentales y sociales

2005

Resumen tomado del autor. Resumen también en inglés Tanto por las Naciones Unidas como por la Comisión Europea (COM, 1997) se insta al estudio, conservación y mejora de los sistemas acuáticos. En la Península Ibérica y hasta la fecha, los índices utilizados habitualmente para evaluar y determinar la calidad del agua basados en los macroinvertebrados tienen una aplicación restringida a los ríos, ya que, en los demás ecosistemas acuáticos (lagos, lagunas, humedades, etc.) el comportamiento de dichos índices parece que no aporta conclusiones fiables. Con el nuevo índice ecológico presentado en este trabajo 'Indice del Modo de Nutrición', se pretende evaluar la calidad de la estructura trófica …

Evolutionary genomics can improve prediction of species' responses to climate change

2020

Abstract Global climate change (GCC) increasingly threatens biodiversity through the loss of species, and the transformation of entire ecosystems. Many species are challenged by the pace of GCC because they might not be able to respond fast enough to changing biotic and abiotic conditions. Species can respond either by shifting their range, or by persisting in their local habitat. If populations persist, they can tolerate climatic changes through phenotypic plasticity, or genetically adapt to changing conditions depending on their genetic variability and census population size to allow for de novo mutations. Otherwise, populations will experience demographic collapses and species may go ext…

Asociación entre clima motivacional, ajuste escolar y funcionalidad familiar en adolescentes

2019

The present study seeks to define and contrast an explanatory model of motivational climate, school adjustment and family functioning, and to analyse the existing associations between the aforementioned variables through structural equation analysis. The sample includes 2,134 adolescents aged 12 to 18 years from the province of Granada. Motivational climate (PMCSQ-2), school adjustment (EBAE-10) and family functioning (APGAR) are analysed. A descriptive cross-sectional design is used and the program AMOS 23.0 is employed to construct the multi-group structural equation model. The model showed appropriate fit (χ2 = 241.34; df = 17; p < .001; CFI = .953; NFI = .950; IFI = .953; RMSEA = .079).…

Estrategias para hacer la educación más inclusiva

2009

Se analizan las estrategias para hacer una educación más inclusiva para el alumnado con necesidades educativas especiales.

On the evolutionary stability of female infanticide

1997

Territoriality among female rodents may have evolved as an adaptation to intraspecific competition for resources or, alternatively, to defend pups against infanticide. In order to evaluate the latter, we analyse the conditions that allow an infanticidal strategy to invade a population of non-infanticidal females, and the circumstances under which infanticide may become an evolutionarily stable strategy (ESS). Our game theoretical analyses indicate that infanticide has to be associated with some direct (cannibalism) or indirect (reduced competition) resource benefits in order to invade a non-infanticidal population. We also expect that females will primarily kill litters of nearby neighbors,…

The role of local adaptation in the relationship between an endangered root hemiparasite Euphrasia rostkoviana, and its host, Agrostis capillaris

1999

We experimentally studied the role of local adaptation and the co-evolutionary relationship between an annual, endangered root hemiparasite Euphrasia rostkoviana and its main host Agrostis capillaris. According to our hypothesis, the existence of local adaptation in hemiparasites should be observable in better hemiparasite performance when attached to A. capillaris hosts originating from Euphrasia populations. After one month of growth, the height and the number of leaves of hemiparasites were not affected by the origin of their hosts. The differences in growth were due to between population effects. The situation remained constant after three months. Hemiparasite biomass was not affected b…

Can adaptation lead to extinction?

2005

Ever since J.B.S. Haldane proposed the idea, evolutionary biologists are aware that individual level adaptations do not necessarily lead to optimal population performance. A few deeply mathematical models, drawing from a diverse range of systems, even predict that individual selection can lead to the extinction of the whole population, a phenomenon which has become known as evolutionary suicide. Due to the complexity of both following adaptation and determining the exact cause of an extinction, evolutionary suicide has remained untested empirically. However, three recent empirical studies suggest that it may occur, and that suicide should be taken seriously as a potentially important evolut…