Claim Missing Document
Check
Articles

Found 2 Documents
Search

Effect of Different Nitrogen Concentrations on the Growth Rate of Caulerpa lentillifera Sea Grapes Amanda, Rofifah Aulia; Mukhlis, Alis; Lumbessy , Salnida Yuniarti
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-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.v25i3.9755

Abstract

Caulerpa lentillifera is a strategic macroalgae commodity in controlled cultivation that requires nutrient management optimization for maximum productivity. This study evaluated the effect of nitrogen concentration variations (0, 15, 30, 45 ppm) on algae growth parameters in a complete randomized design with three replicates over 15 days (12 experimental units). Data analysis was carried out using One-Way ANOVA (95% confidence level) and Duncan post-hoc test to compare parameters such as absolute and relative biomass, specific growth rate, rate of decline, biomass residue, and chlorophyll-a content. The results showed that the concentration of 45 ppm resulted in the highest absolute biomass (23 g) and optimal relative growth (36.59%), while 30 ppm provided the highest specific growth rate (7.40 %/day) and the lowest specific decline rate (2.3 %/day). Surprisingly, the control (0 ppm) recorded the highest chlorophyll-a (20 μg/g), while at 45 ppm there was a significant decrease (9.67 μg/g). It is concluded that the optimal nitrogen range is 15–30 ppm, as it offers the best balance between productivity and physiological stability. At the applicative level, it is recommended the use of moderate nitrogen concentrations in commercial cultivation of C. lentillifera for economic efficiency without sacrificing biomass quality.
Etika Ekosentrisme sebagai Paradigma Pengelolaan Sumber Daya Alam dan Lahan Berkelanjutan di Indonesia Amanda, Rofifah Aulia; Sarjan, Muhammad
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 2 (2026): May (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i2.1905

Abstract

Global environmental crises such as land degradation, deforestation, pollution, biodiversity loss, and climate change show that anthropocentric-oriented natural resource management hasnot been able to create environmental sustainability. Indonesia as a megabiodiversity country also faces serious environmental problems, such as the area of degraded land reaching 24.3-48.3 million hectares, the rate of net deforestation of 175.4 thousand hectares per year, and the decline in soil biodiversity on intensive agricultural land. This condition shows the need for an alternative paradigm that pays more attention to ecological sustainability. This research aims to analyze the ethics of ecocentrism as a paradigm of sustainable natural resource and land management in Indonesia, identify its main principles, examine its implementation in environmental management, and formulate sustainable development policy recommendations. The research uses a literature review method with a descriptive quantitative analysis approach. Data is obtained from scientific articles, government reports, and international documents relevant to sustainable environmental management. A total of 78 articles and documents were analyzed in depth. The results of the study show that the ethics of ecocentrism places nature as an entity that has intrinsic value and is applied through agroforestry strategies, soil and water conservation, forest rehabilitation, and local community empowerment. In addition, the integration of sustainable development principles in national policies such as the SDGs and FOLU Net Sink 2030 shows a shift towards more ecologically oriented environmental management. However, its implementation still faces challenges in the form of low environmental awareness, limited funding, and conflicts of interest between natural resource exploitation and environmental conservation. However, the ethics of ecocentrism can be a relevant alternative paradigm in the sustainable management of natural resources and land in Indonesia because it is able to encourage a balance between human needs and environmental sustainability. Therefore, it is necessary to strengthen ecosystem-based policies, increase environmental education, support funding, and cooperation between the government, the community, academics, and the private sector to support the implementation of sustainable environmental management.