Foraminifera Proxy of Short Core Samples: A Retrospective Study of Ecological Development of Surabaya and Bali Semi-enclosed Bay, Indonesia | Chapter 4 | Emerging Issues in Environment, Geography and Earth Science Vol. 6

 

Retrospective overviews are essential in development planning and/or environmental health monitoring based on geological perspective through paleoecology. The studies are using various indicators, one of which is using recent foraminifera. Within last decades, the semi-enclosed bays of Lamong Bay in Surabaya and Benoa Bay in Bali have had enormous physical development. To ensure the continuity of existing infrastructure, it is necessary to discover the threats of natural and/or anthropogenic hazards through retrospective studies. Therefore the aim of this study is to reveal the ecological development of semi- enclosed bays using benthic foraminifera as a proxy over time periods. The research was conducted in March 2017, included analysis of absolute age and sedimentation rate using the Pb-210 isotope and recent foraminifera indexing from short core samples. The Ammonia-Elphidium index (A-E index) as a proxy of hypoxia and the planktonic/benthic ratio (P/B) as a proxy of open ocean flow were used in the study. The foraminiferal indeces revealed that both sites have experienced different ecological changes in the last few decades. Over the past 87 years, the Lamong Bay has undergone ecological changes, from the aquatic environment that was strongly influenced by the open sea and supports the benthic life, to shallow oligotrophic waters that cannot support benthic life. In contrast, Benoa Bay was shallow waters for 50 years and supports benthic life without any significant threat as the other coastal waters especially for the semi-enclosed bay. The research results showed that massive development in coastal areas will affect the ecological development/change of the area. Natural factors

 

Author(s) Details:

 

R. Rositasari
Research Center for Oceanography, National Research and Innovation Agency Jl, Pasir Putih I, Ancol Timur, Jakarta Utara, 1440, Indonesia.

 

 

Please see the book here: https://doi.org/10.9734/bpi/eieges/v6/6874E

 

Foraminifera Proxy of Short Core Samples: A Retrospective Study of Ecological Development of Surabaya and Bali Semi-enclosed Bay, Indonesia | Chapter 4 | Emerging Issues in Environment, Geography and Earth Science Vol. 6

Retrospective overviews are essential in development planning and/or environmental health monitoring based on geological perspective through paleoecology. The studies are using various indicators, one of which is using recent foraminifera. Within last decades, the semi-enclosed bays of Lamong Bay in Surabaya and Benoa Bay in Bali have had enormous physical development. To ensure the continuity of existing infrastructure, it is necessary to discover the threats of natural and/or anthropogenic hazards through retrospective studies. Therefore the aim of this study is to reveal the ecological development of semi- enclosed bays using benthic foraminifera as a proxy over time periods. The research was conducted in March 2017, included analysis of absolute age and sedimentation rate using the Pb-210 isotope and recent foraminifera indexing from short core samples. The Ammonia-Elphidium index (A-E index) as a proxy of hypoxia and the planktonic/benthic ratio (P/B) as a proxy of open ocean flow were used in the study. The foraminiferal indeces revealed that both sites have experienced different ecological changes in the last few decades. Over the past 87 years, the Lamong Bay has undergone ecological changes, from the aquatic environment that was strongly influenced by the open sea and supports the benthic life, to shallow oligotrophic waters that cannot support benthic life. In contrast, Benoa Bay was shallow waters for 50 years and supports benthic life without any significant threat as the other coastal waters especially for the semi-enclosed bay. The research results showed that massive development in coastal areas will affect the ecological development/change of the area. Natural factors such as geomorphological settings and circulation patterns are secondary factors that will magnify or reduce these changes/developments.

Author(s) Details:

R. Rositasari,
Research Center for Oceanography, National Research and Innovation Agency Jl, Pasir Putih I, Ancol Timur, Jakarta Utara, 1440, Indonesia.

Please see the link here: https://stm.bookpi.org/EIEGES-V6/article/view/13065

Distribution of Benthic Foraminifera in Littoral Zone of Besant Nagar, Chennai | Chapter 11 | New Visions in Biological Science Vol. 5

 In the carbon cycle in sediment waters, foraminifera species found in ocean waters play a significant function as pollution indicators as well as ecologically vital responsibilities. The goal of this study was to look into the diverse kinds of Foraminifera that were found along the littoral zone of the ocean waters at Chennai's Besant Nagar beach. Beach sediments from Besant Nagar waters revealed the presence of 20 benthic foraminiferal species belonging to 14 genera, 10 families, 7 super families, and 3 suborders. The hypotypes were numbered, labelled, and stored in the Department of Applied Geology's repository in Chennai, Tamil Nadu 600025. Scanning electron micrographs (SEM) of the identified species were collected, and the hypotypes were numbered, labelled, and stored in the Department of Applied Geology's repository in Chennai, Tamil Nadu 600025. As ecological parameters, pH, dissolved oxygen (DO), biological oxygen demand (BOD), and salinity were explored. Other notable foraminiferal species found include Elphidium crispum, Quinqueloculina seminulum, Operculina (Assilina), Assilina ammonoides, and others. This study is unique in that it focuses on foraminifera, which are extraordinarily diverse protozoan colonies that exist between historical and present biological aspects of sediment waters. Deeper ocean waters may be investigated in the future to uncover many more species of these unusual protozoans.

Author(S) Details

Amthul Azeez
Department of Zoology, JBAS College for Women, #56 K.B Dasan Road, Teynampet, Chennai-600018, India.

M. Priya
Department of Zoology, JBAS College for Women, #56 K.B Dasan Road, Teynampet, Chennai-600018, India.

View Book:- https://stm.bookpi.org/NVBS-V5/article/view/4610