[en] Activities associated with timber harvesting have occurred within floodplain forests in the southern United States for nearly two hundred years. However, it is only in the last ten years that any information has become available about the effects of harvesting on the ecological functions of this valuable resource. Hydrology is the driving influence behind all ecological processes in floodplains and, in most cases, timber harvesting alone has little long-term effect on hydroperiod. However, there may be some instances where logging roads, built in association with harvest sites , can alter hydroperiod to the extent that vegetation productivity is altered positively or negatively. There is no documentation that harvesting followed by natural regeneration represents a threat to ground or surface water quality on floodplain sites, as long as Best Management Practices are followed. Harvested floodplains may increase or have little effect on decomposition rates of surface organic matter. The nature of the effect seems to be controlled by site wetness. Data from recently harvested sites (i.e. within the last ten years) suggest that vegetation productivity is maintained at levels similar to that observed prior to harvests. During the early stages of stand development vegetation species composition is heavily influenced by harvest method. Similarly, amphibian populations (monitored as bioindicators of ecosystem recovery) seem to rebound rapidly following harvests, although species composition may be different. 40 refs, 3 figs

No abstract available

[en] The rhizosphere provides a special environment for microorganisms. As such, emergent aquatic plants play an important role in wetlands. However, due to the sampling methods, it is difficult to obtain sediment samples attached to specific sections of roots. Here, we developed a sampling method for segmented acquisition of sediment and in situ detection of environmental factors from the rhizosphere. This method can be particularly useful for emergent aquatic plants with rhizomatic root systems. (paper)

[en] Although our understanding of environmental risk assessment in temporary wetlands has been improved by the use of multi-species toxicity testing, we still know little of how landscape variables mediate the strength of, and recovery from, anthropogenic stress in such ecosystems. To bridge this research gap, we provide a theoretical framework of the response of temporary wetlands to anthropogenic disturbance along a habitat-isolation continuum based on island biogeography theory, landscape ecology and dispersal and colonization strategies of temporary wetland organisms. - Environmental risk assessment in temporary wetlands may benefit from consideration of island biogeography theory and landscape structure

[en] Restoration of degraded peatlands has been taken into serious action in Indonesia. Paludiculture, which is defined as a cultivation on wet and rewetted peatlands, has been promoted as a solution of peatland restoration. The drained peatland should be blocked and rewetted to increase water table and reduce emission. While planted suitable plants and trees on wet and rewetted peatlands which have economic benefit is challenging. We conducted review and synthesis based on published and unpublished papers resulted from activities of peatland restoration in Indonesia, to show whether paludiculture may provide a balance of both ecology and economic benefits. Results show that rewetted on degraded peatlands reduces green-house-gas emission. However, few tree options for wet and rewetted peatland restoration which provides economic benefit. Tree selection usually based on specific site, price and market. Peatland restoration is complexs, therefore the paradigm of peatland restoration should focus on socio-ecological restoration first. Economic benefit will come later as both tangible and intangible economic benefits. Economic friendly schemes, such as REDD+ and rewards for environmental services (RES) may be more suitable as a trade-off in peatland restoration. (paper)

No abstract available

No abstract available

[en] The Albeni Falls Interagency Work Group was actively involved in implementing wildlife mitigation activities in 2000. The Work Group met each quarter to discuss management and budget issues affecting Albeni Falls wildlife mitigation. Members of the Work Group protected a total of 1,242 acres of wetland habitat in 2000. The total amount of wildlife habitat protected for Albeni Falls mitigation is approximately 4,190 acres (4,630 Habitat Units). Approximately 16% of the total wildlife habitat lost has been mitigated. Land management activities were limited in 2000 as protection opportunities took up most staff time. Administrative activities increased in 2000 as funding was more evenly distributed among Work Group members. As a result, implementation is expected to continue to increase in the coming year. Land management and monitoring and evaluation activities will increase in 2001 as site-specific management plans are completed and implemented

[en] Four wetland crossings of gas pipeline rights-of-way (ROWs), located in Florida, Michigan, New Jersey, and New York, were surveyed for generation of vegetation roughly one year after pipeline construction was completed. Conventional trench-and-fill construction techniques were employed for all four sites. Estimated areal coverage of each species by vegetative strata within transect plots was recorded for plots on the ROW and in immediately adjacent wetlands undisturbed by construction activities. Relative success of regeneration was measured by percent exposed soil, species diversity, presence of native and introduced species, and hydric characteristics of the vegetation. Variable site factors included separation and replacement of topsoil, final grading of the soil, application of seed and fertilizer, and human disturbance unrelated to construction. Successful regeneration exhibited greater dependency on the first three factors listed

[en] Liming (with applications of 1000 to 8000 kg/ha) had no long- term (1929-1985) effect on the growth of Scots pine on drained oligotrophic peatlands. Liming plus NPK fertilization had a variable effect on the growth of stands. The same treatment could result in a very different response in different experimental areas. Both liming alone and liming plus NPK fertilization increased the calcium, magnesium and nitrogen contents of peat and decreased the C/Nratio and acidity. Liming plus fertilization decreased needle boron and manganese and increased calcium and nitrogen concentrations. The results of peat and needle analysis indicated that the changes in nitrogen availability to trees caused by liming have not been sufficient enough to affect tree growth. It was also concluded that boron deficiency was the main reason for the lowered yield. (26 refs., 6 tabs., 8 figs.) (author)