Agricultural pesticide use is necessary to help meet the increased demand for a safe and secure food supply for the United States, as well as the global community. Even with proper application and careful management, the possibility of pesticide leaching and detachment in runoff still exists following certain storm events. Several different management practices have been designed to reduce the ...

The relative importance of oxygen for root-associated methanotrophy was examined by using sediment-free, intact freshwater marsh plants (Pontederia cordata and Sparganium eurycarpum) incubated in split chambers. The root medium contained approximately 100 (mu)M methane. Methane oxidation was calculated from the difference between methane loss from chambers in the presence and absence of 1 mM 1-...

In this study, we aimed to identify the macrophyte pattern and diversity under exposure substantial hydromorphological degradation in rivers, taking into account water quality factor. The study was based on 190 small medium lowland rivers Poland that had experienced channel alterations. number of taxa identified (153 species) consistent with natural/seminatural average species richness for surv...

Constructed, mitigation wetlands in the midwestern United States are frequently dominated by a Typha spp. monoculture and their hydrologies often determined adjustable control structures. Wetlands provide habitat for multiple macroinvertebrate species, which turn food other organisms inhabiting wetlands, such as waterfowl. This study examined impacts of plant diversity manipulated hydrology on ...

Methane oxidation associated with the belowground tissues of a common aquatic macrophyte, the burweed Sparganium eurycarpum, was assayed in situ by a chamber technique with acetylene or methyl fluoride as a methanotrophic inhibitor at a headspace concentration of 3 to 4%. Acetylene and methyl fluoride inhibited both methane oxidation and peat methanogenesis. However, inhibition of methanogenesi...

Regional humidity is important for terrestrial ecosystem development, while it differs from region to in inland Asia, knowledge of past moisture changes the lower basin northern Xinjiang remains largely unclear. Based on a pollen record Jili Lake, Artemisia /(Amaranthaceae + Ephedra ) (Ar/(Am E)) ratio, as an index regional humidity, has recorded four relatively dry phases: 1) 400 BCE 1 CE, 2) ...