THE EFFECT OF DIFFERENCES pH OF WATERS ON THE GROWTH RATE OF SEAGRASS OF Cymodocea rotundata
Article Sidebar
Accepted
3 June 2023
Published
31 May 2023
Keywords:
-
acidification, CO2, leaf, rhizome, root
Abstract
The continued use of fossil fuels will increase the concentration of carbon dioxide (CO2) in the atmosphere. Ocean acidification occurs due to CO2 in the atmosphere diffusing into the oceans. The oceans are able to absorb CO2 in the atmosphere as much as 35 % more which causes a decrease in ocean pH. Seagrass Cymodocea rotundata is a type of seagrass that can be found growing in tropical waters. This situation raises concerns about the possible impact on the growth of seagrass C. rotundata. This study aims to analyze the content of nitrate, phosphate and potassium and the growth of seagrass C. rotundata which includes the growth of leaves, rhizomes and roots of C. rotundata against differences in pH. The study used an experimental method with a completely randomized design using a random table. A total of 15 jars with a diameter of 20 cm and a height of 25 cm were used with 3 treatments, each treatment was repeated 5 times. The results of the linear regression test showed that pH had an effect on nitrate concentrations, and had a strong effect on phosphate and potassium concentrations. The highest growth rate of C. rotundata seagrass leaves in the control ranged from 0.50–1.29 mm/day while the lowest at low pH ranged from 0.07–0.73 mm/day. The growth rate of seagrass rhizomes horizontally and vertically was highest at low pH while the lowest was at control pH. The highest growth rate of seagrass roots at low pH ranged from 0.20–0.90 mm/day. while the lowest was in the control ranged from 0.13–0.43 mm/day. pH also affects the growth rate of leaves, rhizomes and seagrass roots of C. rotundata. The lower the pH, the lower the leaf growth rate, in contrast to rhizomes and roots, the lower the pH, the higher the growth rate.
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Hidayat, M., Ruswahyuni, & N. Widyorini. 2014. analisis laju sedimentasi di daerah padang lamun dengan tingkat kerapatan berbeda di Pulau Panjang, Jepara. Management of Aquatic Resources, 3(3): 73-79. https://doi.org/10.14710/marj.v3i3.5624
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Jiang, Z.J., X.P. Huang, J.P. Zhang. 2010. Effects of CO2 enrichment on photosynthesis, growth, and biochemical composition of seagrass Thalassia hemprichii (Ehrenb.) aschers. Journal of Integrative Plant Biology, 52(10): 904–913. https://doi.org/10.1111/j.1744-7909.2010.00991.x
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Koch, M., G. Bowes, C. Ross, & X.H. Zhang. 2013. Climate change and ocean acidification effects on seagrasses and marine macroalgae. Global Change Biology, 19(1): 103–132. https://doi.org/10.1111/j.1365-2486.2012.02791.x
Le Que´re, C., R.M. Andrew, P. Friedlingstein, S. Sitch, J. Pongratz, A.C. Manning, J.I. Korsbakken, et al. 2018. Global carbon budget. Earth System Science Data, 10: 405-448. https://doi.org/10.5194/essd-10-2141-2018
Martin, B.C., J. Bougoure, M.H. Ryan, W.W. Bennett, T.D. Colmer, N.K. Joyce, Y.S. Olsen, & G.A. Kendrick. 2018. Oxygen loss from seagrass roots coincides with colonisation of sulphide-oxidising cable bacteria and reduces sulphide stress. The ISME Journal, 13: 707-719. https://doi.org/10.1038/s41396-018-0308-5
Martin, S., R.R. Metalpa, E. Ransome, S. Rowley, M.C. Buia, J.P. Gattuso, & J. Hall-Spencer. 2008. Effects of naturally acidified seawater on seagrass calcareous epibionts. Biology Letters, 4: 689–692. https://doi.org/10.1098/rsbl.2008.0412
McEnaney, R.A. 2019. Effects of reduced pH on health biomarkers of the seagrass Cymodocea nodosa. DePaul Discoveries Undergraduate Research Journal, 8(1): 1-9. https://via.library.depaul.edu/depaul-disc
Mishra, A.K., S. Cabaço, C.B. de los Santos, E.T. Apostolaki, S. Vizzini, & R. Santos. 2020. Long-term effects of elevated CO2 on the population dynamics of the seagrass Cymodocea nodosa: evidence from volcanic seeps. Marine Pollution Bulletin, 162: 1-11. https://doi.org/10.1016/j.marpolbul.2020.111824
Pajusalu, L., G. Martin, A. Pollumae, & T. Paalme. 2016. The influence of CO2 enrichment on net photosynthesis of seagrass Zostera marina in a brackish water environment. Frontiers In Marine Science, 3(239): 1-10. https://doi.org/10.3389/fmars.2016.0023
Paramitha, A., B. Utomo, & Desrita. 2014. Studi klorofil-a di kawasan Perairan Belawan Sumatera Utara. Jurnal Aquacoastmarine, 2(2): 106–118. https://jurnal.usu.ac.id/index.php/aquacoastmarine/article/view/8827/0
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Authors
Yudho Andika, KawaroeM., EffendiH., ZamaniN. P., Erniati, Erlangga, AdharS., Imanullah, Imamshadiqin, ’AklaC. M. N., SugaraA., & IlhamiB. T. K. (2023). THE EFFECT OF DIFFERENCES pH OF WATERS ON THE GROWTH RATE OF SEAGRASS OF Cymodocea rotundata. Jurnal Ilmu Dan Teknologi Kelautan Tropis, 15(1), 99-111. https://doi.org/10.29244/jitkt.v15i1.43331
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