WHIGHAM, D. F., T. E. JORDAN AND J. MIKLAS (Smithsonian Environmental Research Center, Box 28, Edgewater, MD 21037). Biomass and resource allocation of Typha angustifolia L. (Typhaceae): The effect of within and between year variations in salinity. Bull. Torrey Bot. Club 116: 364-370. 1989.-In a brackish wetland dominated by Typha angustifolia, we found similar aboveground and belowground produ...

Management of river salt loads in a complex and highly regulated river basin such as the San Joaquin River Basin of California presents significant challenges for current Information Technology. Computerbased numerical models are used as a means of simulating hydrologic processes and water quality within the basin and can be useful tools for organizing Basin data in a structured and readily acc...

 Hoor al-Azim wetland, are a large and permanent wetland area located between Iran and Iraq.  By entering the flow to the wetland area, the geometry of the wetland, acts in the form of an inverted imperfect pyramid. So that by entering the water flow, the water level of wetland is simultaneous by increasing the surface. In this study by using the geometric relationships of pyramids, was acted t...

many phragmites-dominated wetlands have been markedly salinized and alkalinized in the songnen plain, northeastern china. agricultural wastewater with high nitrogen content has been discharged into these alkalinized-salinized wetlands. to understand the effect of salinity-alkalinity on reed (phragmites australis) seedlings at various nitrogen levels, we examined photosynthesis rate, chlorophyll...

Given that the characteristic of free floating plants to uptake metals can have a positive effect on the efficiency of the remediation process of a wetland, it is important to investigate the factors that may impact the process of uptake of metals by the plants. By conducting this present study over a short duration of time, the effects of salinity on the growth, the content of the photosynthet...

We analyzed tidal wetland vegetation patterns in the San Francisco Bay–Delta estuary (Bay–Delta) and discuss their significance for future conservation. Our objective was to conduct a balanced, random sample of six historic “remnant” tidal wetlands along a salinity gradient that ranged from southern San Pablo Bay to the lower Delta. We also wanted to compare diversity among these sites at five ...

The delivery and distribution of nutrients in coastal wetland ecosystems is much related to the land use. The spatial variations of TOC, TN, NH4+-N, NO3--N and TP and associated soil salinity with depth in 9 kinds land uses in coastal zone of the modern Yellow River Delta (YRD) was evaluated based on monitoring data in field from 2009 to 2015. The results showed that the average contents of soi...

Water resource management often requires an integrated assessment of resource use options, including local and regional impacts on the environment and stakeholders. The Upper South East of South Australia is one such location, where a large drainage network has been constructed to manage flooding, dryland salinity and environmental outcomes. Within the drainage network, there are a number of re...

Wetland degradation in the Upper South East of South Australia is an urgent management concern. Scant recent environmental data is available for the region and long term monitoring data is lacking. Usually a palaeoecological analysis is able to reveal environmental change in the medium to long term past. However, the region is not conducive to palaeoecological investigation due to a fluctuating...

Estuarine wetlands have received little study in dry tropical and subtropical areas despite the fact that unpredictable rainfall makes their temporal continuity tenuous. In fact, many of these wetlands exist for much of the time as isolated pools that are remnants of extensive areas of shallow water that occur during infrequent flooding. Among the most important functional components of estuari...