Tissue C, N, P content of the three dominant seagrasses in Brgy. Luyahan, Talin Bay, Batangas.

• Main Authors: Guanzon, Michelle A., Ong Kian Koc, Bryan Bernard U., Bataclan, Rommel P.
• Format: text
• Language: English
• Published: Animo Repository 1999
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/10924
• Institution: De La Salle University

Tissue C, N, P concentrations of Enhalus acoroides (Linneaus f.) Royle, Halodule uninervis (Forsskal) Ascherson and Thalassia hemprichii (Ehrenberg) Ascherson collected from Talin Bay, Matuod, Batangas were found to vary between tissue parts (leaves vs. roots/rhizomes). Carbon concentration was generally found to be higher in the roots of Enhalus acoroides during the two sampling months while the two other species were found to exhibit different pattern in carbon concentration between tissue parts and sampling months. Nitrogen content was higher in the roots (except Halodule uninervis) in March and conversely on all the seagrass leaves during the month of July. Phosphorus concentration of the leaves (4.3 mM - 9.5 mM) and the roots (3.2 mM - 8.0 mM) of all selected seagrasses were observed to measure proximate values within a range. Using the N: P ratio for macrophytes (30: 1), the seagrasses N: P values were observed to be nitrogen limited (<30:1, ranges from 10.4215 to 29.0465) except for the roots of Thalassia hemprichii during the March sampling (56.8505) which was observed to be phosphorus limited. N: P ratio is a better index to infer nutrient limitation since nitrogen and phosphorus share common chemical properties like valence status, and their mechanism of uptake across cell membrane are probably similar. Thus, these elemental concentration ratios may be related to the maintenance of biochemical equilibrium with in cells that maximize protein synthesis and tissue production in natural environment.