We investigate the evolutionary history of the wide-ranging Nearctic treefrog Hyla arenicolor through the integration of extensive range-wide sampling, phylogenetic analyses of multilocus genetic data, and divergence dating. Previous phylogeographic studies of this frog documented a potential signature of introgressive hybridization from an ecologically and morphologically divergent sister spec...

The linear and nonlinear Rossby wave solutions are examined in homogeneous square basins on the /-plane both with and without a thin meridional barrier. In the presence of the meridional barrier the basin is almost partitioned into two; only two small gaps of equal width, d, to the north and south of the barrier allow communication between the eastern and western sub-basins. Solutions are force...

Scarcity of in-situ observations coupled with high orographic influences has prevented a comprehensive assessment of precipitation distribution in the high-altitude catchments of Indus basin. Available data are generally fragmented and scattered with different organizations and mostly cover the valleys. Here, we combine most of the available station data with the indirect precipitation estimate...

A multidisciplinary study involving lithofacies analysis, palynofacies, and palynology is presented for the Muarádzi Sub-basin. This sub-basin part of Moatize-Minjova Basin (MMB), an important Karoo aged coalfield in Mozambique. total 99 core samples from 3 coal exploration boreholes (DW11, DW21, DW141) were analysed all successions assigned a Lopingian age based on palynology. According to dat...

The paper evaluated the potential of groundwater pollution in the Densu River Basin of Ghana. Groundwater is an important resource in this basin currently supporting domestic, agricultural and industrial activities. The significance of water resources and the potential for groundwater quality to deteriorate due various anthropogenic activities within the Densu River Basin has necessitated this ...

The supply and demand of ecosystem services their mutual feedback are important for the formulation basin ecological environmental policies. Simulation spatial flow can clarify division areas support policy development. This paper takes Jinghe Basin in Loess Plateau China as case-study area to simulate soil conservation service on different scales. results showed that (1) erosion situations imp...

Soil conservation and control of erosion is a basic problem in all countries. The goal of this research is to estimate erosion and sediment yield in Ekbatan Dam drainage basin by Erosion Potential Method (EPM), using Geographic Information System (GIS). The basin is located in Hamedan Province, west of Iran, in a cold and semi- arid region, with an average annual rainfall of 334mm. The study ar...