Abstract：
Epiphytes on Posidonia oceanica play a crucial role for determination of the ecological status of marine environment in time and space besides the seagrasses alone. The study was aimed to estimate the spatiotemporal ecological status linked to variation in biometry of an epiphytic micro-calcareous red alga, Hydrolithon boreale, found on leaves of the meadow with the exclusive environmental parameters along the entire Turkish coast of the Mediterranean Sea. Collection of Posidonia oceanica samples was conducted at 64 stations in winter (December 2018-January 2019) and 112 stations in summer (June-July 2019) by SCUBA (0.4 × 0.4 m of a quadrate frame) in the infralittoral zone along the entire Turkish Mediterranean coast surrounded by the siliciclastic Taurus Mountain Range which favor growth of epiphytic micro-calcareous red algae. Percent occurrence of the epiphyte changed seasonally-lower in winter (25%) than in summer (44%). The epiphyte which is an indicator and sensitive to undisturbed marine area grew up well to 5 mm in diameter, 0.35 mm in thickness of the crust size, and was populated up to 1006 ind/m2 in summer owing to the increased utilization of the carbonate by the epiphyte with the increased water temperature. The size was contrasted to the density (abundance and biomass) in space. The biometry was significantly dependent on the siliciclastic-carbonate deposition as inferred from SiO4-Si of the water in relation to the leaf area index (LAI) of P. oceanica. Therefore, this deposition induced specimens to grow in size, followed by the reduced density concerning the N-based nutrient of the water. Further major environmental parameters which negatively affected the biometry were pH and total suspended matter of the water, analogous to turbidity. Of the trace elements, Ni was negatively correlated with the biometry, whereas the LAI was however positively correlated with all the anthropogenic-sourced trace elements (V, Cu, Zn, As, Cd, and Pb) in the leaves. Of the bottom types, the calcite rock had a higher density than the other soft bottoms in contrast to the size of the epiphyte. Future studies could be based on the present study for determination of the ecological status regarding two dominant epiphytes on leaves of two seagrasses (H. boreale on P. oceanica and partly Pneophyllum fragile on Cymodocea nodosa) found in the different environments and substrates in space and time.
摘要：
除海草外，海洋波西多尼亚附生植物对确定海洋环境在时间和空间上的生态状况起着至关重要的作用。该研究旨在评估与附生微钙质红藻生物特征变化相关的时空生态状况，水岩钻孔，在草地的叶子上发现，具有整个地中海土耳其海岸的独特环境参数。在冬季（2018年12月至2019年1月）的64个站点和夏季（2019年6月至7月）的112个站点，通过SCUBA（0.4×0.4m的方格框架）在整个土耳其地中海沿岸的沿海区域进行了海洋波西多尼亚样品的收集被硅质金牛座山脉包围，有利于附生微钙质红藻的生长。附生植物的发生率在冬季（25％）的季节性变化低于夏季（44％）。附生植物是一种指标，对未受干扰的海洋区域敏感，直径可达5毫米，厚度为0.35毫米的地壳大小，由于随着水温的升高，附生植物对碳酸盐的利用增加，夏季人口最多可达1006ind/m2。大小与空间中的密度(丰度和生物量)形成对比。生物统计学很大程度上取决于硅质碎屑-碳酸盐的沉积，这是由水的SiO4-Si相对于Oceanica的叶面积指数（LAI）推断的。因此,这种沉积导致标本尺寸增大，其次是关于水的氮基养分的密度降低。对生物特性产生负面影响的其他主要环境参数是pH值和水的总悬浮物，类似于浊度。微量元素中，Ni与生物特征呈负相关，然而，LAI与所有人为来源的微量元素呈正相关(V，Cu,Zn,As,Cd,和Pb）在叶子中。在底层类型中，与附生植物的大小相比，方解石岩石的密度高于其他软底部。未来的研究可以基于本研究来确定两种海草叶片上两种优势附生植物的生态状况（H。在空间和时间上的不同环境和基质中发现的洋黄上的洋黄上的洋黄和部分在结球花科植物上的脆弱的石竹）。
