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Rizal Umami
Universitas Mataram
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Mapping Potential Carbon Content of Seagrass Species as Gas Regulation in Sekotong Waters, West Lombok Hendra Susana Putra; Agil Al Idrus; Rizal Umami
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i1.4369

Abstract

Seagrass is one of the ecosystems that absorbs carbon through the process of photosynthesis which can be stored in the form of biomass in the leaves, rhizomes and roots. The content of heavy metal Hg in roots, rhizomes, and leaves of seagrass species has a negative correlation, namely the higher the heavy metal content, the lower the chlorophyll content, which can trigger climate change due to greenhouse gases. The aim of this study was to determine the potential carbon absorption capacity of seagrass species in Sekotong waters, West Lombok. The research method used _ is descriptive quantitative. Plant samples were collected using the Purposive Random Sampling method. Analysis of the carbon content in samples of seagrass species can be identified through C-organic analysis conducted in the laboratory using the Walkley and Black method. The results of the study found that the average Hg and carbon content of seagrass species in seagrass beds were Station 1: (Hg: 0.31, Carbon: 63%), Station 2: (Hg: 0.45, Carbon: 50%) and Station 3: (Hg :0.35%, Carbon:55%). so that it can be concluded that the carbon content in seagrass species decreases with the level of involvement of mercury in seagrass species. The research results are expected to be used as a source of information related to carbon absorption by seagrasses in Sekantung waters, West Lombok so that they can be taken into consideration for the management of water areas, especially the waters of Waring Sekotong, West Lombok.
Evidence of The Successful Conservation of Enhalus Acoroides in Terms of The Diversity of Bivalves on The Coast of East Lombok Rizal Umami; Agil Al Idrus
Jurnal Biologi Tropis Vol. 23 No. 2 (2023): April-June
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i2.4320

Abstract

The existence of seagrass in coastal areas can affect marine biota that live around it. Seagrass has an important role as an area of ​​care, spawning, and protection. This study aims to determine the success of conserving seagrass beds of the Enhalus acorodies species in terms of bivalve diversity on the south coast of East Lombok. The research was conducted using transect and observation methods. The data obtained were analyzed using evenness index, diversity index, and species richness. The results of the study found 10 types of Bivalves in Poton Bako. Bivalves diversity index is included in the medium category of 2,228. The evenness index of bivalves was 0.409 in the low category. Then, the species richness index is 1.653 in the low category. The species diversity of Bivalvia in seagrass beds in Poton Bako is still relatively moderate so that the sustainability of the seagrass species Enhalus acoroides can be said to be maintained. The existence of a feed source or substrate derived from the remains of seagrass is used as a source of feed. The conservation of Enhalus acoroides seagrass needs to be maintained so that it has an impact on the survival and diversity of Bivalves in the area.
Mangrove Ecosystem Services in Mitigation for Mollusca Communities in Lembar Sheet District, West Lombok Regency Sekar Partiwi; Agil Al Idrus; Rizal Umami
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i3.4367

Abstract

Mangroves have an important role in mitigation and a significant contribution to the wealth of macrofauna. The success of mangrove management has significantly affected the diversity of macrofauna which are associated biota. The research objectives were to investigate the composition of mangroves and mollusc communities, the ecological conditions of the waters, and evidence of mangrove ecosystem services in mitigation. The research data sources are faunal, ecological, and social data. The research method uses purposive sampling and data analysis using descriptive statistics. The results showed that 7 mangrove species were found in the Cemare mangrove area. Avicennia marina, Bruguiera gymnorriza, Ceriops tagal, Rhizophora apiculata, Rhizophora mucronata, Rhizophora stylosa, and Sonnetaria alba. The dominant mangroves were Rhizopora stylosa (201 ind/Ha) and Rhizopora apiculata (146 ind/Ha). Meanwhile, the highest abundance of mollusc species was obtained by Cerithidea cingulate (38.94%) and Nerita undata (29.20%) from the gastropod class, while from the Bivalvia class, Anadara grandis (36.07%) and Anadara granosa (19.67%) were found). The condition of the aquatic environment at the research site is still within the tolerance range required for the growth and development of mollusk species. Furthermore, the majority of respondents know or are aware that mangroves have an ecological function (habitat/habitat for animals), an economic function (a livelihood location), a physical mitigation function (abrasion resistance), a non-physical mitigation function (reducing environmental heat) Good category. These results indicate that efforts need to be made to increase mangrove revegetation, given its significant benefits in mitigation.
Gastropod Species Diversity in The Mangrove Bale Area of Poton Bako East Lombok Adam Restu; Raudatul Jannah; Rizal Umami
Jurnal Biologi Tropis Vol. 23 No. 2 (2023): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i2.6196

Abstract

Gastropoda is a class with the biggest number of species, since a class of Mollusca phylum is generally effectively adjusted to different sorts of marine and freshwater territories to earthbound conditions. So a study was conducted on the diversity of Gastropoda species in the Bale Mangrove Poton Bako East Lombok area with the aim of knowing the types of gastropods that exist in the area. The method used in this study is the quadrat transect method. The results of research on the diversity of gastropod species in the Bale Mangrove Poton Bako East Lombok area found 6 species of Gastropoda including Cerithidea sp, Telebralia sulcata, Nerita undata, Telescopium telescopium, Chicoreus capucinus, Indothais gradate. The average diversity index value of the three stations is H′ = 1.41262991 which means that the diversity of Gastropods in the Bale Mangrove Poton Bako Area of East Lombok is moderate diversity.
Co-Authors Adam Restu Agil Al Idrus Hendra Susana Putra Raudatul Jannah Sekar Partiwi