The Effect of Seasonal Variations on the Abundance of <em>Oikopleura dioica</em> in the Northwestern Arabian Gulf
<p id="p1">This study aimed to assess the impact of physicochemical parameters, serving as indicators of eutrophication, on the abundance of <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">Oik...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Capítulo de libro |
| Lenguaje: | inglés |
| Publicado: |
IntechOpen
2024
|
| Materias: | |
| Acceso en línea: | https://www.intechopen.com/chapters/89357 |
| Etiquetas: |
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | <p id="p1">This study aimed to assess the impact of physicochemical parameters, serving as indicators of eutrophication, on the abundance of <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">Oikopleura dioica</italic></em> in Kuwait Bay due to urbanization and sewage runoff. Seasonal variations and the abundance of <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em>, along with physicochemical parameters (temperature, salinity, dissolved oxygen concentration, and nutrient concentrations), and chlorophyll-a concentrations were investigated at three stations—KB1, KB2, and KB3—separated by approximately 18–20 km in the eutrophic seawater of Kuwait Bay. The abundance of <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em> measured 35.3 ± 28.60 × 10<sup>3</sup>, 48.2 ± 45.11 × 10<sup>3</sup>, and 43.4 ± 15.46 × 10<sup>3</sup> ind m<sup>−3</sup> in KB1, KB2, and KB3, respectively. Statistical analysis showed no significant variation in <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em> abundance among the three stations (F = 0.123; d.f = 11, <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">p</italic></em> > 0.05). Moreover, the abundance of <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em> exhibited positive correlations with salinity, chlorophyll-a, and nitrates (r = 0.9; p > 0.05), while being negatively affected by dissolved oxygen concentration (r = − 0.64; p > 0.05). During summer, <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em> showed the highest abundance at each station, with a peak of 125 × 10<sup>3</sup> ind.m<sup>−3</sup> in KB2. Principal Component Analysis (PCA) revealed a strong association between <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em> density, chlorophyll-a, and salinity during summer, suggesting that adequate food quality and quantity may contribute to the growth and reproduction of <em><italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">O. dioica</italic></em> in Kuwait Bay.</p> |
|---|---|
| ISBN: | 978-0-85014-207-5 |
| DOI: | 10.5772/intechopen.114943 |