Asesmen Eutrofikasi Perairan Pesisir Menggunakan Metode Indeks Trofik (Trix)

Abstract

EUTROPHICATION ASSESSMENT METHOD FOR COASTAL WATER USING TROPHIC INDEX (TRIX). Eutrophication, a process in which water bodies experience excessive growth of aquatic plants due to accumulation of land-originated nutrients especially phosphorus and nitrogen, has become a worldwide coastal environmental problem. Its negative impacts have been well known including oxygen depletion, harmful algal blooms, biodiversity reduction and ecosystem degradation. Unfortunately, the occurrence of those impacts is often not well anticipated as the instruments for assessing the quality of coastal and marine environment are weak and hardly available. Therefore, there has been a growing concern in developing appropriate methods for assessing coastal and marine eutrophication. One of the most widely used methods is trophic index (TRIX) due to its good efficacy. However, it is still questionable whether TRIX is a universal index of eutrophication or the scaling of TRIX should be region specific.

Global Warming Potential of Carbon dioxide and Methane Emission from Mangrove Sediment in Waiheru Coastal, Ambon Bay.

“…7) . The value of CH4 gas Sediments emissions is higher than gas emissions in mangrove sediments in North India reported by [29], with CH4 gas emission values of 0.0003 -0.0004 mg.m -2 .h -1 . However, it is much lower than the average emission in mangrove sediments in the Tallo -Makassar River, which is 6.68 mg.m -2 .h -1 [12].…”

“…Seasons also spatially and temporally influence CO2 gas emissions in mangrove ecosystems. The length of sunlight in summer causes an increase in water temperature which triggers the rate of microorganism activity in the reaction to form CO2 gas [21,29]. The same goes for the duration and frequency of heavy rains.…”

“…External factors are the input of organic and fresh waste, which increases the amount of organic matter that must be decomposed, thereby increasing the production of CH4 gas [25,27]. Increased nutrients and organic matter in mangrove ecosystem areas can be influenced by anthropogenic activities [29]. Organic matter accumulated in mangrove sediments can increase the amount of total organic carbon, which is a significant factor in the formation of methane gas in mangrove ecosystem areas [30].…”

Pemodelan Status Trofik Danau Laut Tawar Aceh Tengah

“…Status trofik p-ISSN : 2528-3561 e-ISSN : diklasifikasikan dalam empat kategori, yaitu oligotrofik, mesotrofik, eutrofik dan hipereutrofik [4,5,6]. Kelas oligotrofik merupakan kategori perairan yang miskin unsur hara [7] dan biasanya memiliki air yang sangat jernih. Kelas hipereutrofik adalah pengklasifikasian kondisi perairan yang sangat kaya unsur hara [6], biasanya sudah mengalami degradasi berat, bahkan dianggap sangat berbahaya untuk kesehatan biota air dan manusia.…”

Trophic status analysis and estimation of fish production in Aneuk Laot Lake aquatic resources management, Sabang City

“…According to Prayitno (2017) TRIX is considered to be more effective than other methods because it has several advantages, including being able to be used to determine trophic level status using more data so that it can be used to see changes in trophic levels from time to time. This is in accordance with what Radiarta and Sagala (2012) said that the trophic level of a lake can be expressed based on the content of total phosphate (TP), total nitrogen (TN), chlorophyll-a and phytoplankton biomass.…”