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Global warming potential of nitrous oxide fluxes from sediments of mangrove ecosystem in Waiheru coastal area, Ambon Bay

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Title Global warming potential of nitrous oxide fluxes from sediments of mangrove ecosystem in Waiheru coastal area, Ambon Bay
 
Creator Kesaulya, I
Rahman
 
Subject Ambon Bay
Global warming
Nitrous oxide
Sand
Sandy-mud substrate
 
Description 503-509
Mangrove ecosystems can be a source or a sink of N2O and other greenhouse gases. The Inner Ambon Bay area,
including the Waiheru coast, gets organic matter inputs deposited in sediments, which has the potential to trigger an increase
in greenhouse gas flux. This research was conducted to evaluate the flux and global warming potential of N2O in sediments
of the mangrove ecosystem in the area of Waiheru coastal, Ambon Bay. The sediment-trapped gas was collected from the
chambers of three different types of sediments viz. sandy, muddy sand, and sandy mud sediments. The gas was extracted
from chambers using a syringe and injected into the 10 ml glass bottle. N2O concentrations in the samples were analyzed
using gas chromatography. Average N2O concentrations were compared between samples from different sediments using
one-way ANOVA. The result showed that the mean concentration of N2O was significantly different between the sediment
types (P < 0.05). The highest N2O flux in mangrove sediments was found in the sandy substrate (0.0278 mg.m-2.h-1) and the
lowest in the muddy sand substrate (0.0135 mg.m-2.h-1). The average Global Warming Potential (GWP) in mangrove
sediments of Waiheru coastal area was 6.29 CO2-eq mg.m-2.h-1, which was contributed by sandy substrate (8.30 CO2-eq
mg.m-2.h-1), sandy mud substrate (6.57 CO2-eq mg.m-2.h-1) and muddy sand substrate (4.01 CO2-eq mg.m-2.h-1). The
reported values of GWP were relatively low based on the standard value of IPCC, which is 298 CO2-eq mg.m-2.h-1
indicating that the nitrification and denitrification processes producing N2O gas flux are still in normal condition, which
would not cause air pollution.
 
Date 2024-07-23T07:09:51Z
2024-07-23T07:09:51Z
2024-07
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/64272
https://doi.org/10.56042/ijms.v52i11.2633
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJMS Vol.52(11) [November 2023]