## 3 Results and Discussion  
The EOs were isolated using hydrodistillation and analyzed using GC-MS. Twenty-eight compounds were identified in the samples, accounting for 96.60% (December) to 99.49% (April) of the EOs (Table 1 and Table S1). The greatest amount of identified compounds was categorized into two chemical groups, including terpen and saturated aliphatic compounds. The proportion of terpen was highest in September and lowest in April, while the distribution of saturated aliphatic compounds was inversely proportional. The majority of terpen were monoterpenes, with limonene dominating in all samples (Table 1, Figure 1). \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c} \hline \hline
**Component** & **B2** & **B3** & **Primary** & **Primary** & **Mass** & **Age** & **M3** & **Age** & **M4** & **Age** & **M5** & **Age** & **Sponder** & **Change** & **Number** & **Densities** \\ \hline \hline \(\alpha\) Perseus & 007 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 007 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \(\alpha\) Perseus & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 & 008 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Chemical composition of volatile compounds in the amount \(>\)1% identified in sea femoral leaf essential oils throughout a 1-year period. This cyclic monoterpene was most abundant in August (84.53%) and least abundant in January (58.74%), which was confirmed by a statistically significant difference (Table 1). January was the only month that showed a significant difference compared to all other months. The amount of limonene correlated with the average temperature level (r = 0.694, \(p\) = 0.025), as did the amount of \(\alpha\)-pinene (r = 0.641, \(p\) = 0.025) and terpinen-4-ol (r = 0.647, \(p\) = 0.023), while germacrene B (r = -0.770, \(p\) = 0.004), hexadecane (r = -0.602, \(p\) = 0.038), and octadecane (r = -0.627, \(p\) = 0.029) were also correlated, but negatively (Table 2). Limonene  
Figure 1: Graphical presentation of changes in (**a**) the most abundant volatile compounds from sea fennel leaves essential oil (**b**) the most abundant phenolic and carotenoid compounds from sea fennel leaves during a 1-year period in dependence of weather condition.