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To improve wastewater treatment efficiency by hydroponic ditches (HDs) and hybrid constructed wetlands (CWs) in cold regions and create evergreen landscape in cold periods, a research on them cultivated with Lolium perenne at depths of 10 cm and 60 cm were carried out. Water temperature of 10 °C was as the boundary between cold and non-cold periods. During the 2 years’ experiment, L. perenne grew...
Increased nutrient loading is regarded as one of the major causes of a shift from macrophyte to phytoplankton dominance in shallow lakes. This work investigates the responses of phytoplankton and epiphyton biomass, macrophytes and algal species assemblages along a trophic gradient in some shallow Mediterranean lakes. A unimodal response of epiphyton biomass to increasing phosphorus levels was observed,...
Kolleru Lake, the largest freshwater wetland in India is highly degraded because of siltation, weed infestation and large-scale aquaculture encroachments. Restoration of the lake involves data on the original extent of this shrinking lake and on its extant condition. Previous studies indicated that the lake was a coastal lagoon abutting the Bay of Bengal during the mid-Holocene and later turned into...
We present the paleoecological development of a rich fen located in the dune area on the SE Baltic coast, during the last 7500 years. The Apšuciems Mire hosts rare and endangered plant communities in Europe, such as Schoenus ferrugineus and Cladium mariscus. Analysis at high-resolution of plant macroremains in two peat cores was carried out to reconstruct local vegetation succession and fluctuations...
Leaf area index (LAI, one-sided leaf area per unit ground area) is an important parameter in models of canopy-atmosphere carbon exchange and greenhouse gas fluxes that has been disproportionately under-studied in wetland ecosystems. This study assessed variation in LAI and its sensitivity to canopy height, structure and remotely sensed normalized difference vegetation index (NDVI) in the California...
Wetlands are among the most productive ecosystems on the planet and they are being subjected to heavy pressure by human activities. Changes in wetlands due to human impacts have increased, and it is estimated that half of the global wetland area has been lost during the last century. Documented cases of wetland transformation confirm the trend in Colombia. We used official nationwide wetland maps...
The Araguaia River floodplain is a large wetland in the tropical savanna belt (cerrado) in the southern Amazon basin. Studies using multitemporal satellite Landsat 5 TM images with a spatial resolution of 30 m indicate a surface area at maximum flood level of 88,119 km2. During the low-water period, only 3.3 % of the area is covered by water. Flooding is the result of the annual rise in the water...
Scirpus planiculmis, a perennial herb typically grown from tubers in wetlands, is the main food species for migratory Siberian white crane (Grus leucogeranus) in Momoge National Nature Reserve (MNNR), northeastern China. However, Echinochloa caudata, an annual weed propagated only from seed, became the dominant species in the majority of the rewetted site in Momoge wetland, which decreased the habitat...
Waterfowl rely on breeding habitat availability for successful reproduction. Breeding habitat availability likely changes throughout the season and among years as weather patterns change and thus productivity rates are likely susceptible to these changes. We used data from 1961 to 2011 to investigate effects of weather, breeding habitat availability and abundance of breeding mallards (Anas platyrhynchos...
Rapid field assessment indicators of ecological stress and disturbance may or may not reflect actual biological conditions. We tested the ability of rapidly assessed buffer quality to predict and classify wetland floristic quality across 106 sites in Oklahoma, USA. We used buffer zone metrics from a national-level rapid assessment tool (USA-RAM) to evaluate applicability at the state level. The rapid...
We compared exudation and rhizosphere microbial activity of two macrophytes growing in tropical marshes. Eleocharis spp. are adapted to low nutrient level in phosphorus limited conditions, while Typha domingensis is a strong competitor in nutrient enriched areas. In situ measurements of carbon fluxes from roots to interstitial water and 13C partitioning after pulse-labelling of the plants in a mesocosm...
This study aimed to determine the role of environmental factors in the pattern of vegetation related to marsh soils, which are rare in the Baltic coastal zone. It was assumed that the pattern of vegetation directly affected by seawater depends on seawater salinity, and in general reflects the decreasing salinity gradient of the Baltic Sea. The research of vegetation and soils (0–25 cm) has been undertaken...
We present data on a transitional mire in South-Western Siberia that evolved from early thermokarst lake succession. The vegetation of the mire shows a remarkable zonation from the edges to the center. Vegetation, peat characteristics, pH and electric conductivity were recorded at 10 sites along a transect of 1.5 km. At two of the transect points with contrasting vegetation and succession stage (floating...
Sea-level rise is expected to cause saltwater intrusion into tidal freshwater wetlands. The resulting changes in the soil environment would likely cause shifts in plant and microbial communities and alter ecosystem functions. To simulate saltwater intrusion, we constructed a solar-powered automated irrigation system. The system consisted of holding tanks that were filled with freshwater or artificial...
The performance of free water surface flow constructed wetlands (CW) may be impaired by abiotic factors. The effects of seasons on the water quality improvement and on the community of plankton were evaluated in a CW system with the macrophytes Cyperus giganteus Vahl, Typha domingensis Pers., Eichhornia crassipes (Mart.) Solms and Pontederia cordata L. Water, plankton and macrophytes were sampled...
This study describes the importance of reedbed and riparian habitats for the annual cycle of Cetti’s warbler Cettia cetti. We examined the seasonal variation in population structure and body condition using a long-term data set (11 years) from bird ringing. Because seasonal variations in the differential use of each wetland type should be influenced by food resources and shelter conditions for roosting,...
Urban wetlands can serve to reduce flooding and improve water quality, yet we know little about their plant communities. Our study aims to characterize the vegetation and soil parameters of these important ecosystems, and to compare these features to those of previously sampled natural wetlands in south-central New York. Vegetation and soil characteristics were sampled in eight urban wetlands and...
Estuarine ecosystems are changing rapidly in response to anthropogenic impacts. Mangrove expansion in New Zealand is mainly attributed to favourable climatic conditions and increased sedimentation due to land use change. This expansion is associated with large scale shifts in ecosystem structure and function, with significant potential impacts on coastal carbon and nitrogen storage. A fundamental...
Wetlands on the Qinghai-Tibet Plateau fall into six types (alpine, piedmont, valley, riverine, floodplain, and lacustrine) from the geomorphic-centered perspective, each having its own species assemblage. This study attempts to explore its relationship with the environment. It is found that all wetland plants in Maduo County on the Plateau belong to 15 families, 35 genera and 56 species. Most species...
Increased demand for oil palms has led to a massive expansion of logging and conversion of peat swamp forests in Southeast Asia. Although palm oil is a primary driver of economic growth, the unsustainable expansion of the oil palm industry has led to the widespread degradation of peat swamp forests. Birds have been studied to determine their responses to landscape changes in the North Selangor Peat...
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