Three different types of ponds were compared: ponds with wastewater; ponds with wastewater and reeds; and ponds with wastewater, reeds and aeration.
The Experiment 1 had a 2 × 2 factorial design with two levels of stocking density and two types of pond management system (feeding and fertilization) resulting in four treatments in triplicates: stocking density 1 + feeding (S1F1), stocking density 1 + fertilization (S1F2), stocking density 2 + feeding (S2F1) and stocking density 2 + fertilization (S2F2).
Human-associated fecal markers (BacHum) were found in less than 10% of sampled water sources of any type, with ponds having the highest prevalence (7.7%) and private tube wells the lowest (2.4%).
Anuran tadpoles exhibit a range of inducible morphological changes, such as heightened tail depth, in the presence of a threat by various types of pond dwelling predator such as dragonfly larvae [ 13- 15].
Microalgae mass cultures, mostly using raceway-type open ponds, are currently used commercially to produce several thousand tons of food- and feed-grade algal biomass annually.
Therefore, it is recommended that to provide high aquatic diversity of species in urban areas one should aim at promoting high diversity of different types of ponds with differing management and environmental factors that shape them.
Almost all of Greenland's high-arctic landforms and biodiversity are represented in the valley, including moraines, scree slopes, rock glaciers, gently sloping rock faces, river beds, alluvial fans, a raised delta, beach terraces, permanent and perennial snow beds and glaciers, several types of ponds and lakes, fens, heath and barren lands, together with most known species of plants and animals.
Recruitment success varied by both year and pond type.
Nutrient removal is contingent upon the type of oxidation pond (Kayombo et al. 2010).
The BOD removal is not only dependent on the type of oxidation pond, but on other factors such as the environment (Mara and Pearson 1998).
