نتایج جستجو برای: floodplains
تعداد نتایج: 1171 فیلتر نتایج به سال:
Significant ecological, hydrologic, and geomorphic changes have occurred during the 20th century along many large floodplain rivers in the American Southwest. Native Populus forests have declined, while the exotic Eurasian shrub, Tamarix, has proliferated and now dominates most floodplain ecosystems. Photographs from late 19th and early 20th centuries illustrate wide river channels with largely...
Spanning over 3000 km in length and with a catchment of approximately 1.4 million km, the Zambezi River is the fourth largest river in Africa and the largest flowing into the Indian Ocean from the African continent. We present data on greenhouse gas (GHG: carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O)) concentrations and fluxes, as well as data that allow for characterization of s...
The ability to represent geospatial semantics is of great importance when building geospatial applications for the web. It will not only enhance discovery and retrieval of geographic information, but it will also enable its translation and reuse in contexts other than the original one. We propose a method for automating the semantic annotation of geodata based on spatial characteristics and sug...
Due to their spatial complexity and dynamic nature, floodplains provide a wide range of ecosystem functions. However, because of flow regulation, many riverine floodplains have lost their characteristic heterogeneity. Restoration of floodplain habitats and the rehabilitation of key ecosystem functions, many of them linked to organic carbon (C) dynamics in riparian soils, has therefore become a ...
We report mercury (Hg) mass-dependent isotope fractionation (MDF) and mass-independent isotope fractionation (MIF) in hair samples of the Bolivian Esse Ejjas native people and in several tropical fish species that constitute their daily diet. MDF with delta(202)Hg ranging from -0.40 to -0.92 per thousand for fish and +1.04 to +1.42 per thousand for hair was observed. Hair samples of native peop...
Floodplain soils and reservoir sediments are known for their fine-grained structure rich organic-matter substances; therefore, they able to sorb metals other potential pollutants, which is characteristic of sink function [...]
Successfully managing heavily visited protected riverscapes requires information about visitor preferences for the social, biophysical and infrastructural attributes of river landscapes. This study analyzed landscape 520 on-site visitors to peri-urban Danube Floodplains National Park using an image-based discrete choice experiment. The explored effects various types (water bodies, terrestrial l...
Cecropia latiloba can be considered to be one of the most efficient colonizers of open areas in the nutrient-rich whitewater floodplains of the Amazon river. Its main strategy to be successful is the high tolerance towards waterlogging and submergence, and the fast vertical growth and reiteration capacity. This, and the tolerance of high irradiation and sediment deposition allow C. latiloba to ...
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