To investigate how habitat type influences species diversity and distribution of algae, 115 sampling sites across eight different habitats (stream, spring, lake, pool, wetland, ditch, trough, hot-spring) were randomly sampled from Ağrı province, Turkey. A total of 392 algal taxa (gamma diversity) were identified, of which 212 taxa (54.08%) belonged to Bacillariophyta while the rest (180 taxa) belonged to seven other groups (Chlorophyta, Charophyta, Euglenophyta, Cyanobacteria, Miozoa, Ochrophyta, and Cryptophyta). 150 taxa were encountered only once. The highest alpha diversity was found in ditches (H' =4.57, 235 taxa) followed by streams (H' = 4.40, 238 taxa), and the lowest diversity was recovered in troughs (H' = 2.62, 42 taxa). Relatively high Whittaker's beta diversity (Bw = 19) indicated a low level of similarity among sampling sites suggesting that no common taxonomic group was solely effective enough to change dominancy level of any species among the habitats. The first two axes of Canonical Correspondence Analysis accounted for 58.1 % of the total variance in the occurrence of 152 algal taxa (all taxa recovered from more than three samples) and described gradients across four environmental variables (habitat type, pH, elevation and water temperature). Ditches significantly contribution to alpha and gamma diversity in the province although they have relatively small surface area and shallow water compared to other habitat types. High alpha diversity in ditches may be related to the positive effect of geographic and climatic factors in mountainous area. Future possibilities are discussed.

为了调查生境类型如何影响藻类物种多样性和分布，从土耳其阿勒省随机抽取了八个采样点（河流，春季，湖泊，水池，湿地，沟，槽，温泉）的115个采样点。总共确定了392个藻类群（γ多样性），其中212个类群（54.08％）属于芽孢杆菌，而其余的（180个分类群）属于其他七个组（绿藻类，绿藻类，蓝藻类，蓝藻属，Miozoa，Ochrophyta和隐藻）。仅遇到一次150个分类单元。在沟渠中发现最高的α多样性（H'= 4.57，235个分类单元），然后在溪流中发现（H'= 4.40，238个分类单元），而最低的多样性在谷底中被回收（H'= 2.62，42个分类单元）。相对较高的Whittaker' β多样性（Bw = 19）表明采样点之间的相似度很低，这表明没有一个共同的生物分类组足以改变栖息地中任何物种的优势水平。规范对应分析的前两个轴占152个藻类群发生的总方差的58.1％（所有类群均从三个以上的样本中回收），并描述了四个环境变量（栖息地类型，pH，海拔和水温）的梯度）。尽管与其他生境类型相比，沟渠的表面积和浅水区相对较小，但沟渠对全省的α和γ多样性贡献显着。沟渠中较高的阿尔法多样性可能与山区地理和气候因素的积极影响有关。讨论了未来的可能性。