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All Journal Syntax Idea Genbinesia Journal of Biology
Dwijaya, Bayu Awifan
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Health Professions Immunology & microbiology

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Paleoproduktivitas Formasi Tapak Banyumas Berdasarkan Bukti Mikrofosil Dwijaya, Bayu Awifan; Prabowo, Romanus Edy; Waluyo, Gentur; Prayitno, Imam
Syntax Idea Vol 3 No 2 (2021): Syntax Idea
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-idea.v3i2.1001

Abstract

Tapak formation is a formation that is known to experience many changes in the ancient environment. This research was conducted in Tapak Formation, Mount Tugel, Banyumas Regency using bentonik and nannofosil foraminifera. Relative age analysis showed the sample age was around the initial pliocene, i.e. NN14 to no younger than NN15 (4.2 million years ago to lower than 3.5 million years ago). Paleoecological dynamics observed from abundance and diversity of microfossils experienced a decreased tendency from older samples to younger samples. Changes in paleoproductivity were observed based on primary and secondary productivity, where older samples tended to be higher than younger ones. Toc (Total Organic Carbon) content in older samples has a higher value than younger samples. The value of CaCO3 relatively increased in the younger direction, but in the A21N sample the percentage increased dramatically.
Contribution of the Mangrove ecosystem to the Gastropod community at Pantai Bahagia village, Muara Gembong, West Java Dwijaya, Bayu Awifan; Krisnanti, Sukma Awifan; Ramdhani, Ardo
Genbinesia Journal of Biology Vol. 1 No. 1 (2021): November 2021
Publisher : Generasi Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55655/genbinesia.v1i1.2

Abstract

The Mangrove ecosystem of Muara Gembong has been under continuing stress by land occupation, land conversion, and abrasion. This research was aimed to reveal the mangrove and gastropods community structure circumstance. A contribution of the environmental factor was also assessed to evaluate the interaction among them and to track the changes of the ecosystem. This research was conducted by purposive sampling in 3 sampling sites, these were a full reforestation site (A), a central site, that was exist by natural process (B), also a moderate reforestation site (C), with 3 sampling replication each site. About 4 mangrove species within shoreline has been progressively important as a protective flood barrier and abrasion at Muara Gembong. The highest gastropod diversity was found in the B1 site, while the highest dominance was found in A2. The C2 site is the only site that showed us a uniform dispersion of gastropods when the other sites showed a clumped dispersion. It can be implied that the ecosystem has been gradually degraded. Eigen and loading value from Canonical Correspondence Analysis (CCA) revealed that a gastropods community was holistically affected by pH, basal area, canopy, substrate, and TDS. The community of gastropods was influenced 62.14% by pH, and 34.29% by basal area. while the highest dominance was found in A2. The C2 site is the only site that showed us a uniform dispersion of gastropods when the other sites showed a clumped dispersion. It can be implied that the ecosystem has been gradually degraded.
Co-Authors Gentur Waluyo, Gentur Krisnanti, Sukma Awifan Prayitno, Imam Ramdhani, Ardo Romanus Edy Prabowo