This study determined the relative sensitivity of five species of aquatic macrophytes and six species of algae to four commonly used herbicides (atrazine, metribuzin, alachlor, and metolachlor). Toxicity tests consisted of 96-h (duckweed and algae) or 14-d (submerged macrophytes) static exposures. The triazine herbicides (atrazine and metribuzin) were significantly more toxic to aquatic plants ...

This study investigated the presence and distribution of 22 antibiotics, including eight quinolones, nine sulfonamides and five macrolides, in the water, sediments, and biota samples from Baiyangdian Lake, China. A total of 132 samples were collected in 2008 and 2010, and laboratory analyses revealed that antibiotics were widely distributed in the lake. Sulfonamides were the dominant antibiotic...

8 Think about your first reaction if you saw a poster at your local pet shop announcing “New Ornamental Plant Kills All Algae in Your Tank Within 24 Hours—Money Back Guarantee!” How much would you be willing to spend on such a plant? Unfortunately, no such plant has yet been identified. But it is a scientific fact that some plants secrete chemicals that are toxic to other plants. Can we use suc...

The availability of standardised methodologies to assess the environmental risks of pesticides to non-target plants is currently limited. Aquatic plant test guidelines are only available for algae and Lemna. These studies may not be sufficient especially in the case when contamination via sediment is an important exposure pathway. The present study was initiated to investigate the effects of ex...

PURPOSE: This technical note uses a modeling approach to examine the impacts of suspended sediment concentrations and current velocity on the persistence of submersed macrophytes in a shallow aquatic system. Studies were conducted on Peoria Lake, Illinois, spanning historical times when a meadow-forming species (Vallisneria americana) successively thrived and disappeared, and current times when...

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...

Accelerated degradation of the wetlands and fragmentation of surrounding vegetation in the Andean-Orinoco Piedmont are the main threats to diversity and ecological integrity of these ecosystems; however, information on this topic is of limited availability. In this region, we evaluated the value of 37 lentic wetlands as reservoirs of woody and aquatic plants and analyzed diversity and changes i...

Background: Aquatic and semiaquatic plants have a multiplicity of traditional and ethnopharmacological uses ranging from medicinal, famine food to fodder and others. Therefore, the present study was carried out during the years 2008-2011 to document the locally used medicinal, ethnobotanical and traditional data of aquatic and semiaquatic plants of the Punjab, Pakistan. Material and Method: Var...

Delineation of aquatic plants and estimation of its surface extent are crucial to the efficient control of its proliferation, and this information can be derived accurately with fine resolution remote sensing products. However, small swath and low observation frequency associated with them may be prohibitive for application to large water bodies with rapid proliferation and dynamic floating aqu...