The amount of radioactive isotopes in submerged Ceratophyllum demersum plants samples were estimated using passive track detector CR-39. collected from four selected sites along the Tigris River Baghdad city, on a monthly basis for one complete year 2019. Certain factors like radon concentration (Bq.m-3), radium content (Bq.kg-1) and uranium (ppm) evaluated. average values 222Rn level, 226Ra 23...

Although great progress has been made in clarifying deep-level angiosperm relationships, several early nodes in the angiosperm branch of the Tree of Life have proved difficult to resolve. Perhaps the last great question remaining in basal angiosperm phylogeny involves the branching order among the five major clades of mesangiosperms (Ceratophyllum, Chloranthaceae, eudicots, magnoliids, and mono...

Invasion by free-floating species, such as Eichhornia crassipes, is one of the most critical threats to the biodiversity and sustainability of wetland ecosystems, where all plants experience spatial heterogeneity in substrate nutrients. However, few studies have focused on the effects of free-floating invaders on the capacity of submerged plants to utilize substrate nutrients. A 10-week greenho...

??????????????????????????????????????????????????????.2016?7????????????????????????????2011???????????????????????1980s?????70%??????1960s?????Ottelia acuminata????????Stuckenia pectinata??????Najas marina???????????Potamogeton maackianus??????Ceratophyllum demersum??????Vallisneria natans?.???????????0~2.5 m???????????????Trapa maximowiezii????????????????????2.5~4 m?????????????????????????...

Submerged macrophytes are subjected to potential mechanical stresses associated with fluctuating water levels in natural conditions. However, few experimental studies have been conducted to further understand the effects of water level fluctuating amplitude on submerged macrophyte species and their assemblages or communities. We designed a controlled experiment to investigate the responses of t...

Remediation of the City of Zagreb Jakusevec Dump Site, one of the largest dump sites in Europe, is in progress. Experimental laboratory results of leach­ ate treatment using aquatic macrophytes show that increasing the concentra­ tion of ammonia in the leachate decreases elimination efficiency. In all series of experiments, significantly greater elimination of ammonia and orthophos­ phates has ...

?????????????????????????????????????????????????????????????????????????.???????????????????????????????????.?????????????????????????????????????????????????4??????25?50?75?100 cm??????????Potamogeton malaianus?????Hydrilla verticillata?????Vallisneria natans??????Ceratophyllum demersum?????????????????????.??????1?????????????0.09%???0.09%???3.04%????20.87 mg/kg????10.7 mg/kg????326.67 mg/kg...