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During the past decades, groundwater-dependent ecosystems in the Netherlands have been threatened by a decline in the water-table level. However, information on water-table depths and changes in water-table depths is insufficient and outdated. For policy evaluation, spatially explicit and detailed information on water-table depths is required, especially in areas with groundwater-dependent ecosystems...
Redistribution of largely organic sediment from low elevation sloughs to higher elevation ridges is a leading hypothesis for the formation and maintenance of the native ridge and slough landscape pattern found in peat wetlands of the Florida Everglades. We tested this redistribution hypothesis by measuring the concentration and characteristics of suspended sediment and its associated nutrients in...
Decades of anthropogenic flooding to create wetlands in spring for breeding waterfowl in the Canadian Prairies have produced undesirable successional shifts from open wetlands dominated by endemic Eleocharis palustris L. (spikerush), to habitats dominated by relatively closed communities of Typha latifolia L. (cattail). Using 2 greenhouse experiments, we examined the potential of specific drying regimes...
The number of patches of non-native Phragmites australis in brackish tidal wetlands in the Rhode River subestuary increased from 5 in 1971–72 to 212 in 2007, and the area covered by the patches increased more than 25 times during the same time interval. Genetic analysis of the patches showed that the expansion has primarily been from seed, and genetic similarities between patches indicate that most...
We critically review recent literature on carbon storage and fluxes within natural and constructed freshwater wetlands, and specifically address concerns of readers working in applied science and engineering. Our purpose is to review and assess the distribution and conversion of carbon in the water environment, particularly within wetland systems. A key aim is to assess if wetlands are carbon sinks...
Following ecosystem-scale restoration of a post-harvested bog in Eastern Canada, a long term monitoring program was set up. Peat, water and plant chemistry data were collected during 7 years in a restored peatland, an adjoining post-harvested non-restored peatland, and in a neighboring natural peatland to determine the potential of chemistry data for evaluating of restoration success over time. We...
Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental gradients using...
The recent listing of saltmarsh in northern New South Wales, Australia, as an endangered ecological community has highlighted the need to rehabilitate damaged saltmarsh and create new areas to offset losses. Land managers require scientific measurements of the early stages of restoration for adaptive management but the interpretation of the data should account for environmental factors. In this study...
Surface waters in Taihu Basin, China are increasingly threatened by phosphorus (P) related eutrophication. This study investigated the temporal-spatial status of P in sediment-water in riparian wetlands located in the southern region of Taihu Basin. Two sets of laboratory simulation study, 1) static columns and 2) steady-flow flumes representing wetland in both dry and rainy seasons, were carried...
Understanding factors that influence changes in habitat occupancy of wetland fauna is important, particularly for species of conservation concern. One such species, the Swainson’s warbler (Limnothlypis swainsonii), breeds in bottomland hardwood forests in the southeastern U.S. Because these warblers nest in the shrub layer and forage in leaf litter, they may be negatively influenced by flood-induced...
The loss and degradation of wetlands worldwide has adversely affected waterbirds, which depend on wetland habitats. Many studies have indicated that effectively managed wetlands can provide alternative or complementary habitats for waterbirds and mitigate the adverse effects of wetland loss and degradation. We review the studies on the habitat variables affecting use of wetlands by waterbirds, and...
The 5,280 km2 Sian Ka’an Biosphere Reserve includes pristine wetlands fed by ground water from the karst aquifer of the Yucatan Peninsula, Mexico. The inflow through underground karst structures is hard to observe making it difficult to understand, quantify, and predict the wetland dynamics. Remotely sensed Synthetic Aperture Radar (SAR) amplitude and phase observations offer new opportunities to...
We evaluated the influence of marsh terracing on waterbirds in Louisiana’s Chenier Plain. Terracing is a novel technique used to slow coastal marsh loss. Terracing increases marsh edge and is assumed to slow erosion, decrease pond depth, and encourage vegetation production. From April to September 2005, we monitored waterbirds in paired terraced and unterraced ponds in three sites dominated by Spartina patens...
Riparian fire studies in the American Southwest have focused on flow-regulated rivers and typically show increase in introduced Tamarix, a species with high resprout capacity, and declines in Populus. Effects of fire, however, can vary with environmental setting. We examined riparian fire along the free-flowing Upper San Pedro River (Arizona) by making temporal comparisons supplemented by spatial...
Thousands of depressional wetlands accidentally formed as a result of pre-1977 contour coal mining in the Appalachian Mountains. Eleven 20-yr old sites were found in a watershed that did not receive acid mine drainage. The purpose of this study was to quantify and model above- and below-ground plant biomass in these created wetlands and to evaluate functional development. Sampling was stratified by...
The geocontrol template method was developed to georeference multiple, overlapping analog aerial photographs without reliance upon conventionally obtained horizontal ground control. The method was tested as part of a long-term wetland habitat restoration project at a Lake Erie coastal wetland complex in the U.S. Fish and Wildlife Service Ottawa National Wildlife Refuge. As in most coastal wetlands,...
Wetlands in the Mesopotamian Plain in southern Iraq were extensively drained in the 1990s. Re-flooding of drained areas commenced in 2003, and included parts of the Central marsh between the Euphrates and Tigris Rivers. New vegetation in the re-flooded areas of the Central marsh was studied in 2006. Most of the wetland plant species and communities widely distributed prior to drainage have reappeared,...
Standardized protocols that include the use of call-broadcast have recently been proposed for marsh birds in North America. We used data from point-count surveys collected across North America over eight years to evaluate the extent to which each of 13 focal marsh bird species responded to conspecific and heterospecific call-broadcast relative to passive survey methods. Surveyors detected more individuals...
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