Freshwater biodiversity is under threat worldwide, but the intensity of threat in the Oriental biogeographic region of tropical Asia is exceptional. Asia is the most densely populated region on Earth. Many rivers in that region are grossly polluted, and significant portions of their drainage basins and floodplains have been deforested or otherwise degraded. Flow regulation has been practiced fo...

Sediment transfer from continents to oceans via rivers is one of the important processes regulating river-bank stabilization, soil formation, biogeochemical cycling of elements, crust evolution and many other earth-related processes. Due to changes in continental positions during the geologic past, water flow and sediment loads in rivers have also shown variations during different time periods....

a r t i c l e i n f o Keywords: molybdenum (Mo) isotopes basaltic weathering riverine inputs estuarine mixing The application of the molybdenum (Mo) isotope system as a proxy for determining changes in the redox state of the oceans is predicated on the assumption that the composition of continental input can be characterised from crustal rock types, and remains constant. However, it has recentl...

1. We examined the influence of hydrologic seasonality on temporal variation of planktonic bacterial production (BP) in relatively undisturbed lowland rivers of the middle Orinoco basin, Venezuela. We sampled two clearwater and two blackwater rivers over 2 years for dissolved organic carbon (DOC), chlorophyll, phosphorus and bacterial abundance to determine their relationship to temporal variat...

Preface The Healthy Rivers Commission has completed investigations of the coastal catchments of rivers and lakes as referred to it by the NSW Government since 1995. Lessons learnt from those Inquiries have led the Commission to establish a number of key principles and strategies, which it believes are essential to achieving healthy rivers, lakes and catchments. This document advances a vision f...

Using JERS-1 and PALSAR radar images provided by JAXA, we built regional and continental scale mosaics of Sahara that allowed to discover major geological features. The unique capability of L-band SAR to map subsurface structures in arid areas revealed several impact craters and paleo-rivers in

In this chapter several approaches towards zonation and continuity of biocommunities in streams are analyzed. In older literature, rivers were described in well defined stretches from source to mouth. The biocommunities were described as entities in those stretches. Later, American scientists claimed that a river is a continuum with gradually changing conditions and henceforth gradually changin...