The conversion of wetlands to alternative uses, or land uses that affect either water levels or water quality, have profound implications for the ecological and hydrological services wetlands provide. This study considers the hydrological externalities of agricultural production in one freshwater wetland: the Esteros del Iberà in north-eastern Argentina. Two externalities are considered. First,...

Southeastern Alaska is a remote coastal-maritime ecosystem that is experiencing increased deposition of mercury (Hg) as well as rapid glacier loss. Here we present the results of the first reported survey of total and methyl Hg (MeHg) concentrations in regional streams and biota. Overall, streams draining large wetland areas had higher Hg concentrations in water, mayflies, and juvenile salmon t...

PURPOSE: This technical note provides a procedural framework for evaluating the economic values of wetlands. Important economic concepts on supply/demand and valuation are presented as they relate to the economic valuea supported or provided by wetlands. The framework presented here can be used to evaluate economic values within the Section 404 process, while recognizhg the difficulties of wetl...

Intertidal wetlands such as saltmarshes and mangroves provide numerous important ecological functions, though they are in rapid and global decline. To better conserve and restore these wetland ecosystems, we need an understanding of the fundamental natural bottlenecks and thresholds to their establishment and long-term ecological maintenance. Despite inhabiting similar intertidal positions, the...

Introduct ion .................................................................................................................................... 3 1 1 Carbon Cycling in Forested Wetland So i l s .................................................................................. .3 12 Carbon Fluxes Inputs .............................................................................................

In both ecological research and engineering, the selection of indicator species is crucial. Biodiversity has always been an important policy objective for ecologists environmental managers. Based on this target requirement, we developed a method that reveals individual contributions to biodiversity quantitatively identify during monitoring. The Siangshan Wetland in Hsinchu, Taiwan, was selected...

Wetlands in West Africa are among the most vulnerable ecosystems to climate change. West African wetlands are often freshwater transfer mechanisms from wetter climate regions to dryer areas, providing an array of ecosystem services and functions. Often wetland-specific data in Africa is only available on a per country basis or as point data. Since wetlands are challenging to map, their accuraci...

A lot of wetlands exist in the Yellow River Delta area, Shandong China and exhibit significance for the delta ecological environmental evolution and animal habitat protection. It is important for wetland protection and management to accurately map the wetland distribution by remote sensing due to the fact that the estuary area changes very fast. This study tries to combine subpixel analysis of ...

introduction hoor-al-azim wetland is one of the most important wildlife refuges and marine ecosystems in the south-west of iran where structure and function has been significantly affected by different changes during the 2 recent decades. changes in water regime of hoor-al-azim wetland and human activities are some of the most important factors. changes in water regime and anthropogenic activit...

An assessment of wetland nature reserves and the protection of China’s vertebrate diversity.— We assessed 148 wetland nature reserves in China and the distribution of the four taxa of endemic and threatened terrestrial vertebrates, reptiles, amphibians, birds and mammals. Assessment of the wetland nature reserves was combined with the governmental list of the endemic and threatened vertebrates ...