Between October 2014 to September 2016 we investigated the distribution of macrophyte assemblages in relation to water quality in the south western littoral zone of Lake Tana. in situ measurements of physicochemical parameters (DO, pH, EC, TDS, temperature and Secchi depth) were accompanied by nutrient analyses for NO₃-N, soluble reactive phosphate (SRP) and total phosphorus (TP). Macrophytes were collected manually using a belt transect method. Thirty macrophyte species belonging to fifteen families were identified. Emergent and amphibious plants had the maximum percentage composition at 53 % and 30 %, respectively and attained the highest relative frequency and density, followed by floating species and other forms. Redundancy analysis (RDA) indicated that the density of Azolla pinnata subsp. africana, Ceratophyllum demersum, Cyperus alopecuroides, Digitaria milanjiana, Pycreus macrostachyos, Pycnostachys coerulea and Scirpus pallidus was positively and strongly associated with pH, Secchi depth, SRP and TP whereas that of Amaranthus hypochondriacus, Cyperus papyrus, Echinochloa stagnina, Ipomoea aquatic, Panicum maximum, Sacciolepis Africana and Stuckenia pectinata was negatively and strongly associated with these variables but positively with NO₃-N. The density of Brachiaria sp., Vossia cuspidate and Leersia hexandra was negatively and strongly associated with pH, SRP and TP whereas the density of Typha latifolia was positively and strongly associated with TDS and EC. The highest diversity index (H′ = 2.63) was recorded in Zegie Yiganda sampling site, which was better protected from anthropogenic impacts. In conclusion, Lake Tana is experiencing changes in physico-chemical parameters, which has favored a shift in species composition of macrophytes towards turbidity-tolerant emergent and amphibious species.

在2014年10月至2016年9月之间，我们调查了塔纳湖西南沿海地区大型植物群落的分布与水质的关系。在物理化学参数（DO，pH，EC，TDS，温度和塞奇深度）的原位测量的同时，还进行了NO ₃ -N，可溶性反应性磷酸盐（SRP）和总磷（TP）的营养成分分析。使用皮带样带法手动收集大型植物。确定了属于15个科的30种大型植物。萌芽和两栖植物的最大组成百分比分别为53％和30％，相对频率和密度最高，其次是漂浮物种和其他形式。冗余分析（RDA）表明满江红亚种 Africana，Ceratophyllum demersum，Syperus alopecuroides，Digitaria milanjiana，Pycreus macrostachyos，Pycnostachys coerulea和Scirpus pallidus与pH，Secchi深度，SRP和TP呈正相关关系，而of ，次中音，cho鱼，Cy草，莎草，非洲三叶草和Stuckenia pectinata与这些变量呈负相关，而与NO ₃ -N呈正相关。腕足菌的密度。，Vossia cuspidate和Leersia hexandra与pH，SRP和TP呈负相关关系，而香蒲与TDS和EC呈显着正相关。Zegie Yiganda采样点记录了最高的多样性指数（H'= 2.63），可以更好地保护其免受人为影响。总之，塔纳湖的物理化学参数正在发生变化，这促使大型植物的物种组成向耐混浊的发芽和两栖物种转移。