توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Macro and micro nutrients of tropical seagrasses, Halophila ovalis, H. spinulosa and Halodule uninervis in Johore, Malaysia
اطلاعات انتشار: IRANIAN JOURNAL OF FISHERIES SCIENCES، چهاردهم،شماره۱، Jan ۲۰۱۵، سال
تعداد صفحات: ۱۶
The present study determined and compared contents of macro– (Nitrogen–N, Phosphorus–P, Potassium–K, Calcium–Ca, Magnesium–Mg) and micro– (Zinc–Zn, Iron–Fe, Manganese–Mn, Cupper–Cu) nutrients in four seagrass species; big–leaved (BL) Halophila ovalis (R. Br.) Hook. f., small–leaved (SL) H. ovalis (R. Br.) Ascherson, H. spinulosa (R. Br.) Aschers. in Neumayer and Halodule uninervis (Forssk.) Aschers from three locations; Merambong shoal, Seluyong shoal–1 and Seluyong shoal–2, Johore, Malaysia on March 2013. Dried seagrass samples were subjected to wet digestion method and concentration determined using a Perkin Elmer 5100 PC atomic absorption spectrophotometer. Macro and micro–nutrients varied with species and locations. Observed macro–nutrient contents were high for N (17320 mg kg–1) in big–leaved (BL) H. ovalis from Seluyong shoal–2, P (2921.33 mg kg–1) in big–leaved (BL) H. ovalis from Seluyong shoal–1, and for K (10942.67 mg kg–1) in H. uninervis from Merambong shoal and for Ca (10576 mg kg–1) in small–leaved (SL) H. ovalis from Merambong shoal. Mg (3534.67 mg kg–1) was comparatively higher in H. spinulosa from Merambong shoal. Micro–nutrients such as Zn ranged from 138.67 mg kg–1 to 212 mg kg–1 and Cu from 13.33 mg kg–1 to17.33 mg kg–1 with no discernible differences between species. Fe concentration was consistently higher in all species. Hierarchically macro and micro–nutrients contents did not show a consistent ordered pattern according to species and location. Based on biplots generated by Principle component analysis (PCA), there were clear separation of seagrass species based on the micro– and macro–nutrient contents with locations from Malaysia and other regions.
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