• 제목/요약/키워드: Mangrove soil

검색결과 6건 처리시간 0.019초

Archaeal Communities in Mangrove Soil Characterized by 16S rRNA Gene Clones

  • Yan, Bing;Hong, Kui;Yu, Zi-Niu
    • Journal of Microbiology
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    • 제44권5호
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    • pp.566-571
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    • 2006
  • An archaeal 16S rRNA gene library was constructed from mangrove soil. Phylogenetic analysis revealed archaea in mangrove soil including the Crenarchaeota (80.4%) and Euryarchaeota (19.6%) phyla. The archaeal community in mangrove soil appears to be a mixture of organisms found in a variety of environments with the majority being of marine origin.

Physico-chemical characteristics of mangrove soil in Gulf of Kachchh, Gujarat, India

  • Rajal, Patel;Lamb, Christian;Roshan, Bhagat;Kamboj, R.D.;Harshad, Salvi
    • Advances in environmental research
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    • 제8권1호
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    • pp.39-54
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    • 2019
  • This paper presents comprehensive scientific details about mangrove soil in Gulf of Kachchh, Gujarat. A total of ten sites were studied during November, 2011 to December, 2014 in order to know the physico-chemical characteristics of mangrove soil. The results indicated that the soil in GoK had silty loam texture. Other physico-chemical parameters ranged as; pH: 7.39-7.61, Bulk Density: 0.30 g/㎤-0.54 g/㎤, Particle Density: 1.26 g/㎤-1.76 g/㎤, Organic Carbon: 0.70%-1.13%, Organic Matter: 1.01%-1.74% and Moisture Content: 33.45%-56.38%. The paper would be useful to the stakeholders, coastal managers and scientific communities to know the mangrove soil conditions of Gulf of Kachchh for management and planning for conservation of mangrove ecosystem.

Seasonal Change of Sediment Microbial Communities and Methane Emission in Young and Old Mangrove Forests in Xuan Thuy National Park

  • Cuong Tu Ho;Unno Tatsuya;Son Giang Nguyen;Thi-Hanh Nguyen;Son Truong Dinh;Son Tho Le;Thi-Minh-Hanh Pham
    • Journal of Microbiology and Biotechnology
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    • 제34권3호
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    • pp.580-588
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    • 2024
  • Microbial communities in mangrove forests have recently been intensively investigated to explain the ecosystem function of mangroves. In this study, the soil microbial communities under young (<11 years-old) and old (>17 years-old) mangroves have been studied during dry and wet seasons. In addition, biogeochemical properties of sediments and methane emission from the two different mangrove ages were measured. The results showed that young and old mangrove soil microbial communities were significantly different on both seasons. Seasons seem to affect microbial communities more than the mangrove age does. Proteobacteria and Chloroflexi were two top abundant phyla showing >15%. Physio-chemical properties of sediment samples showed no significant difference between mangrove ages, seasons, nor depth levels, except for TOC showing significant difference between the two seasons. The methane emission rates from the mangroves varied depending on seasons and ages of the mangrove. However, this did not show significant correlation with the microbial community shifts, suggesting that abundance of methanogens was not the driving factor for mangrove soil microbial communities.

Evaluation of Ecological Function of Mangrove Soil on Absorbing Heavy Metals: A Case Study from the Dongzhaigang Mangrove in China

  • Xin, Kun;Huang, Xing;Zhou, Qingqing;Chen, Zhili
    • Journal of Ecology and Environment
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    • 제33권1호
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    • pp.15-18
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    • 2010
  • Mangroves are special plant communities that live along intertidal zones in tropical and subtropical areas. They are regarded as one of the most important types of natural ecosystem in the world because of the many ecosystem functions that they perform, of which water purification is the most complex. Mangrove ecosystems are conducive to the deposition and retention of heavy metals. So it is important to understand the impact of heavy metals on mangrove ecosystems, and especially on soil subsystems. We examined the levels of heavy metals in the soil of mangroves in the Dongzhaigang Mangrove National Nature Reserve. Dongzhaigang, the first mangrove nature reserve established in China, is located south of Haikou in Hainan Island and encompasses $33.37\;km^2$, of which mangroves comprise $20.56\;km^2$. To assess the impact of human activities, we collected a large number of soil samples in four sampling areas (the protection station, the harbor, a tour area, and Yeboluo island) in the study area. We measured the concentrations of Cu, Pb, Zn and Cd in the soil samples using the spectra of polyatomic molecules. The average concentrations of Cu, Pb, Zn and Cd were $5.04\;{\mu}g/g$, $10.36\;{\mu}g/g$, $20.06\;{\mu}g/g$ and $0.06\;{\mu}g/g$, respectively, and the heavy metal concentrations were lowest in the protected area, highest in the harbor, and intermediate in Yeboluo Island and the tour area. The heavy metal concentrations in the soil collected from different sample plots are related not only to the physical and chemical properties of the soil, but also to the heavy metal emitted by nearby pollution sources. Our analysis indicates that tourist boats are the main pollution sources in the study area.

Behaviour of Vegetation Health as a Response to Climate and Soil Dynamics between 2000 and 2015 in Different Ecological Zones of Rivers State, Nigeria

  • Eludoyin, Olatunde Sunday;Aladesoun, Olawale Oluwamuyiwa
    • Journal of Forest and Environmental Science
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    • 제37권4호
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    • pp.280-291
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    • 2021
  • The study examined the influence of climate and soil dynamics on vegetation health across the ecological zones in Rivers State, Nigeria. MODIS imagery was used to assess the vegetation health through NDVI and point grid pattern of meteorological data for total precipitation (TP), air temperature (AT), soil moisture (SM) and soil temperature (ST) of 2000, 2003, 2006, 2009, 2012 and 2015 were used for the study. Descriptive and inferential statistics were used for data analysis. Findings showed that NDVI ranged between 0.420 and 0.612 in the freshwater swamp (FWS) while between 0.465 and 0.611 in the rainforest and the NDVI in the mangrove was generally low. The highest mean AT was experienced in the mangrove ecological zone and the least was experienced in the rainforest. The mean SM was generally highest in the rainforest with highest value in 2000 (774.44 m3/m3). The ST was highest in the mangrove and the least was experienced in the rainforest while the TP was highest in the mangrove. NDVI correlated significantly with SM (r=0.720; p<0.05) and ST (r= -0.493; p<0.05). NDVI, SM, TP and ST significantly varied among the ecological zones. Regression analysis showed that vegetation health was significantly related to the combination of soil temperature and soil moisture (R2=0.641; p=0.000). Thus, monitoring the factors that affect vegetation health in a changing climate and soil environments is highly required.

제주도 황근(Hibiscus hamabo) 잎의 기체 교환과 자생지에서의 토양호흡 (Leaf gas exchange of Hibiscus hamabo and soil respiration in its habitats on Jeju Island)

  • 최유진;김광중;이정민;김형섭;손요환
    • 환경생물
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    • 제41권4호
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    • pp.439-446
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    • 2023
  • 맹그로브는 육지와 바다 사이 조간대에 서식하는 식물집단으로, 전지구 탄소 순환에서 중요한 역할을 한다. 그러나 국내에 자생하는 맹그로브 관련 수종의 탄소 순환에 관한 연구는 진행된 바가 없다. 본 연구는 준맹그로브인 황근(Hibiscus hamabo) 자생지 3곳(김녕, 성산, 위미)에서 토양호흡과 잎의 기체 교환을 주기적으로 측정하고 이에 영향을 미치는 요인을 파악하고자 하였다. 토양호흡은 2022년 6월부터 10월까지, 잎의 기체 교환은 6월부터 9월까지 각 월1회씩 측정하였다. 8월의 토양호흡(5.7±0.8 μmol CO2 m-2 s-1)은 다른 달에 비해 유의하게 높았으며(p<0.001), 기온이 증가함에 따라 토양호흡이 증가하였다(p<0.01). 7월에 성산에서의 순광합성률은 9.0±0.9 μmol m-2 s-1로 다른 시기보다 높게 나타났으며(p<0.001), 전체 기간 동안 모든 대상지에서 순광합성률은 기공전도도와 증산속도가 증가할수록 증가하였다(p<0.001). 토양호흡은 순광합성률과 양의 선형관계(r2=0.12; p<0.01)를 나타내었다. 이러한 결과는 토양호흡이 계절을 동반한 기온뿐만 아니라 광합성에 의한 CO2 흡수에 영향을 받기 때문인 것으로 보인다. 본 연구는 향후 준맹그로브 수종의 탄소 동태 분석에 기초 자료로 활용될 수 있을 것이다.