in order to indicate the effect of duck's presence, anas platyrhynchos in paddy fields on rice (oryza sativa l.) yield, yield components and its effect on weed density, an experiment was carried out in baz ghaleh dezh village, located in sangar, guilan, iran in 2013. this experiment was performed based on factorial split-plot analysis conducted in a randomized complete block design (rcbd)....

Aquatic macrophytes determine the physical structure of many microhabitats in water and strongly influence distribution various aquatic animals. In this study, we analyzed main microhabitat characteristics that affected spatial invertebrates shallow wetlands South Korea (Jangcheok Reservoir). Environmental variables, macrophyte biomass, invertebrate groups were used to analyze using a self-orga...

Mecynocera clausi I.C. Thompson, 1888 is the type genus and species of the monotypic family Mecynoceridae Andronov, 1973. Based on the first description of male mouthparts of Mecynocera clausi Thompson, 1888 (Copepoda: Calanoida), evidence is presented for the transfer of this genus and species to the Paracalanidae Giesbrecht, 1893. Thus, Mecynoceridae Andronov, 1973 becomes a junior synonym of...

Pisolithus albus (Basidiomycota, Sclerodermataceae) is reported here for the first time from Egypt where it was found on Karaman Island in Sohag Governorate. It forming an ectomycorrhizal association with Eucalyptus occidentalis and Vachellia nilotica. The fungus also near two potentially new hosts: Paspalum distichum Dodonaea viscosa; however, mycorrhizal connections these hosts not proven. Ph...

Background: Macrophytes are commonly utilised as habitat by epiphytic species; thus, complex macrophyte structures can support high diversities and abundances of epiphytic species. We tested the hypothesis that the presence of aquatic macrophytes is an important factor determining Sida crystallina (O.F. Müller, 1776) distribution. Results: An ecological survey was conducted in 147 lentic freshw...

the effects of 450-days of flooding on morphological and gas exchanges responses were investigated under controlled conditions for populus deltoides (colon 77.51) and taxodium distichum seedlings. seedlings were subjected to three outdoor treatments: not flooded (control), flooded to 3 cm above the soil surface (shallow flooded), and flooded to 15 cm above the soil surface (deep flooded). flood...