This study was conducted in order to compare the hornwort aquatic plant (Ceratophyllum demersum) with an artificial filter for purification in a recirculating aquaculture system (RAS). At first, the fluctuation of nitrogen components of the water reuse system equipped with artificial filtration was evaluated. Experiments were performed during three months. The hornwort aquatic plant was collect...

1. Herbivory on freshwater macrophytes has been assumed to be insignificant and rare. More recent evidence suggests herbivory is common and the impact of invasive invertebrate herbivores can be substantial. However, little is known about consumption of macrophytes by fish. 2. We performed a series of feeding assays, based on the consumption by common carp (Cyprinus carpio), to determine if any ...

Macrophytes show a zonal distribution along the lake littoral zone because of their specific preferred water depths while the optimum growth water depths of dominant submersed macrophytes in natural lakes are not well known. We studied the seasonal biomass and frequency patterns of dominant and companion submersed macrophytes along the water depth gradient in Lake Erhai in 2013. The results sho...

2/3 of the reservoir surface area was approximately covered with dense populations of Myriophyllum, Ceratophyllum and Potamogeton species. The headwaters of the reservoir were considered as hard water and had both carbonatic and non-carbonatic hardness. When they were exposed to lentic condition of the reservoir and its intensive photosynthetic activities of macrophyte communities, the bicarbon...

In recent years, an invasive macrophyte, Egeria densa , has overwhelmingly colonized some midstream reaches of Japanese rivers. This study was designed to determine how E. been able colonize these areas and assess the environmental conditions that limit or even prevent colonization. Invasive species ( Elodea nuttallii ), native Myriophyllum spicatum Ceratophyllum demersum Potamogeton crispuss )...

Abstract System-scale restoration efforts within the Upper Mississippi River National Wildlife and Fish Refuge have included annual monitoring of submersed aquatic vegetation (SAV) since 1998 in four representative reaches spanning ? 440 river kilometers. We developed predictive models relating data (site-scale SAV abundance indices) to diver-harvested biomass, used back-estimate standing stock...