Thesiss

This study was conducted near Ibadan, Nigeria to determine the extent of soil acidification due to N fertilization and leaching of Ca, Mg and K from the surface layers of an Oxic Paleustalf (Egbeda series). The N sources included two inorganic N fertilizers, urea (UA) and ammoni…

A Holocene lake sediment record spanning 7300 years from Wishart Lake, in the Turkey Lakes Watershed central Ontario, was produced to determine the main drivers of long-term change in the lake ecosystem. The mid-Holocene sediments are dominated by benthic diatoms, around 4000 yr…

El conocimiento actual de los patrones de diversidad biológica se basa principalmente en laevaluación de la riqueza de especies a distintas escalas. Es reconocido ampliamente que estamedida de diversidad no se distribuye al azar, donde el patrón más recurrente y documentado aesc…