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Journal : JOURNAL OF COASTAL DEVELOPMENT

CORRELATION OF ENVIRONMENTAL FACTORS AND DIATOM ASSEMBLAGES IN AKKESHI-KO ESTUARY SYSTEM Ma’ruf Kasim
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 3 (2011): Volume 14, Number 3, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The correlation between diatoms and environmental factor were studied in Akkeshi-ko estuary, easthern part of Hokkaido, Japan. This studied were aimed to clarify whether the dynamic and distribution pattern can be made by correlating for environmental variation and diatoms assemblages in an estuarine system. During this research, there are  positive correlations between pelagic diatom abundance in water column (PDWC), depth and salinity (r = 0.623 and r = 0.652; respectively). There are positive relationship between nitrite + nitrate and the abundance of diatom on the surface sediment. Seasonal variation of the relationship between abundance of diatoms assemblages and ammonia, nitrite+nitrate and phosphate showed occurs in most stations, the high abundance of benthic and pelagic diatoms in summer followed by the increasing of ammonia, nitrite and nitrate and phosphate.
CARBON CONTENT OF PHYTOPLANKTON AND BACTERIA IN AN ESTUARINE SYSTEM Ma'ruf Kasim
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 2 (2011): Volume 14, Number. 2, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Carbon content of diatom, dinoflagellates and bacteria were studied in order to estimate the living particulate organic carbon (LPOC) in an estuarine system. In the water column, diatoms were most abundant in spring than the other seasons. Dinoflagellates, cyanobacteria, and microzooplankton were present in all seasons, even low in cell numbers. The highest abundance of bacteria was at inner region of estuary and lowest at the mouth of Bekanbeusi River. The percentage of benthic diatom to total diatoms assemblages on sediment surface was higher than that in the water column. The POC in water column was composed of 13 – 24 % for diatoms and 0.6 – 1.6 % for dinoflagelate in carbon base throughout a year. The contribution of diatom carbon to total POC showed highest percentage in June (24 %) in the Akkeshi-ko estuary. In general, bacterial carbon was lower than that of diatoms carbon. On average, the contribution of bacterial carbon was 5-8 % to the total POC throughout a year.
GRAZING ACTIVITY OF THE SEA URCHIN TRIPNEUSTES GRATILLA IN TROPICAL SEAGRASS BEDS OF BUTON ISLAND, SOUTHEAST SULAWESI, INDONESIA Ma'ruf Kasim
JOURNAL OF COASTAL DEVELOPMENT Vol 13, No 1 (2009): Volume 13, Number 1, Year 2009
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The research on grazing activity of a sea urchin (Tripneustes gratilla) in tropical seagrass beds wasconducted in Buton Island. The objectives of the research were to study the grazing activity such as foodpreference, grazing rate and grazing times of T. gratilla in tropical seagrass community. The results of theresearch showed that Thalassia hemprichii and Enhalus acoroides are primary food items of T. gratilla andcontained on average of 55 % and 31 % of the gut contents, respectively. The grazing rate of an individualranged from 9.6 - 14.1 g wet weight in 24 hours. The grazing times of T. gratilla were between 01.00 - 11.00a.m. and 15.00 - 21.00 p.m.
Co-Authors . Sumarni, . A Abdullah A.A. Ketut Agung Cahyawan W Abdul Rahman Abdul Rahman AGUS KURNIA Ahmad Mustafa Almualam, . Amiruddin Amir Anastion, . Andi Irwan Nur, Andi Irwan Apriliani, Asnar Arami, Hasnia Arielta, Muhammad Rafly Ariskanti Ariskanti Arnol, Deddy Asnani Asnani Asriyana, . Awal Setya Anugrah Azalia Azalia Bahtiar, . Balubi, Abdul M. Balubi, Abdul M. Balubi, Abdul Muis Bolqiah, Sofri Buamona, Dodi Efendi Cahayani, Rhedita Chayani R, Dita Pramesti Daniel Happy Putra Devi Devi, Devi Didu, La Emiyarti, . Emiyarti, . Farito, . Fitra, Ramad Arya Golok Jaya, La Ode Muhammad Guntur, LM. Ikhwan Halili Halili Harfan Harfan Hariyanti, Wa Ode Haslianti, . Husain, La Ode Kadir Irmin, Irmin Isham, . Ismail, Isman Septian Jamhari Jamhari Jamil, Muhammad Ridha Julizar, Syukur La Baco S La Ode Alirman Afu, La Ode Alirman La Ode Ichlas Syahrullah Yunus La Ode Mehamad Ardiansyah La Ode Muhamad Kiflin La Ode Muslimin Liza Kurnia Mansur Mardin, Mardin Marlia, . Marlin Marlin Muhammad Taswin Munier Munirma, Munirma Mursalim, Ode Muslim Muslim Mutmainnah Muchtar Muzuni, Muzuni Nadia, La Ode Abdul Rajab Nasrun, La Nur Irawati Nur, Indriyani Nurdiana A Nurdiana Nurdiana Nurdiana, - Nurdiana, . Nurlinda, Suriati Onu La Ola, Onu Patadjai, Rahmad Sofyan Rahmat, Fitra Ratna Diyah Palupi Rizal, . Roslindah Daeng Siang S., Salwiyah Saik, Fitriani Saik, Fitriani Salwiyah S, Salwiyah Salwiyah Salwiyah Salwiyah, . Salwiyah, Salwiyah Samdin, Samdin Saniati, Saniati Sari, Wilda Purnama Sarifa, . Sarifa, Sitti Sarimuddin, Sarimuddin Sarini Yusuf Sima, Nur Sudia, LaBaco Sumiati Sumiati Suwaldi Trisno Widodo Tambunan, Reside Taswin Munier Ulfa, Hartina Wardha Jalil Wati, Nela Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono Wulandari Wulandari Yudizar, Arbin Yulianti, Yuni Yusup, Silfi Yusup, Silfi