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Your search keyword '"Kida, Morimaru"' showing total 33 results
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33 results on '"Kida, Morimaru"'

3. Biomass recovery of coastal young mangrove plantations in Central Thailand.

Author

Ohtsuka, Toshiyuki, Umnouysin, Suthathip, Suchewaboripont, Vilanee, Yimatsa, Nada, Rodtassana, Chadtip, Kida, Morimaru, Iimura, Yasuo, Yoshitake, Shinpei, Fujitake, Nobuhide, and Poungparn, Sasitorn

Subjects
MANGROVE plants, FOREST biomass, BIOMASS, PLANTATIONS, MANGROVE forests, COASTAL development, BIOMASS conversion
Abstract

Around one-third of the world's most carbon-rich ecosystems, mangrove forests, have already been destroyed in Thailand owing to coastal development and aquaculture. Improving these degraded areas through mangrove plantations can restore various coastal ecosystem services, including CO2 absorption and protection against wave action. This study examines the biomass of three coastal mangrove plantations (Avicennia alba) of different ages in Samut Prakarn province, Central Thailand. Our aim was to understand the forest biomass recovery during the early stages of development, particularly fine root biomass expansion. In the chronosequence of the mangrove plantations, woody biomass increased by 40% over four years from 79.7 ± 11.2 Mg C ha-1 to 111.7 ± 12.3 Mg C ha−1. Fine root biomass up to a depth of 100 cm was 4.47 ± 0.33 Mg C ha−1, 4.24 ± 0.63 Mg C ha−1, and 6.92 ± 0.32 Mg C ha−1 at 10, 12, and 14 year-old sites, respectively. Remarkably, the fine root biomass of 14-year-old site was significantly higher than those of the younger sites due to increase of the biomass at 15–30 cm and 30–50 cm depths. Our findings reveal that the biomass recovery in developing mangrove plantations exhibit rapid expansion of fine roots in deeper soil layers. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Outwelling of reduced porewater drives the biogeochemistry of dissolved organic matter and trace metals in a major mangrove‐fringed estuary in Amazonia.

Author

Knoke, Melina, Dittmar, Thorsten, Zielinski, Oliver, Kida, Morimaru, Asp, Nils E., de Rezende, Carlos Eduardo, Schnetger, Bernhard, and Seidel, Michael

Subjects
DISSOLVED organic matter, TRACE metals, ESTUARIES, BIOGEOCHEMISTRY, MANGROVE ecology, TRACE analysis, IRON
Abstract

Mangrove‐fringed estuaries are intertidal ecosystems discharging significant amounts of dissolved organic matter (DOM) into coastal oceans. DOM in these ecosystems is derived from autochthonous production, fluvial input, and mangrove porewater outwelling; however, differentiating between these sources remains challenging. Our incomplete understanding of the biogeochemical factors controlling DOM dynamics and its relationship with nutrient and trace metal cycling still hinders the formulation of elemental budgets in coastal environments. Here, we relate the DOM composition in a mangrove‐fringed estuary in North Brazil (Amazonia) to the redox conditions at the formation sites. We combined molecular DOM analyses via ultrahigh‐resolution mass spectrometry (FT‐ICR‐MS) with parallel factor analysis of excitation–emission fluorescence matrices (EEM‐PARAFAC), nutrient and redox‐sensitive trace metal analyses. During low tide, the influx of oxygen‐depleted porewater carried terrigenous DOM, inorganic nutrients, and trace metals into the mangrove‐fringed creeks. Precipitation of metal(hydr)oxides and microbial turnover controlled nutrient and trace metal dynamics in the estuary. The highest inorganic nitrogen concentrations within the upper mangrove‐fringed estuary indicated outwelling from mangrove sediments as an essential source. Phosphate concentrations were highest within the lower mangrove‐fringed estuary, where available phosphate likely exceeded precipitation with iron(hydr)oxides. We tracked the DOM transport to the coastal ocean using a novel molecular index derived from sulfidic porewater (ISuP). Outwelling of recalcitrant DOM from mangrove habitats is relevant in the context of blue carbon storage. Therefore, applying our molecular proxy (ISuP), together with trace‐metal and optical DOM analyses, is a powerful approach for differentiating contributions of diverse DOM sources in highly complex coastal ecosystems. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Organic carbon stock and composition in 3.5-m core mangrove soils (Trat, Thailand)

Author

Kida, Morimaru, primary, Watanabe, Ikumi, additional, Kinjo, Kazutoshi, additional, Kondo, Miyuki, additional, Yoshitake, Shinpei, additional, Tomotsune, Mitsutoshi, additional, Iimura, Yasuo, additional, Umnouysin, Suthathip, additional, Suchewaboripont, Vilanee, additional, Poungparn, Sasitorn, additional, Ohtsuka, Toshiyuki, additional, and Fujitake, Nobuhide, additional

Published
2021
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18. Dissolved Organic Matter Processing in Pristine Antarctic Streams

Author

Kida, Morimaru, Fujitake, Nobuhide, Kojima, Taichi, Tanabe, Yukiko, Hayashi, Kentaro, Kudoh, Sakae, Dittmar, Thorsten, Kida, Morimaru, Fujitake, Nobuhide, Kojima, Taichi, Tanabe, Yukiko, Hayashi, Kentaro, Kudoh, Sakae, and Dittmar, Thorsten

Abstract

Accelerated glacier melt and runoff may lead to inputs of labile dissolved organic matter (DOM) to downstream ecosystems and stimulate the associated biogeochemical processes. However, still little is known about glacial DOM composition and its downstream processing before entering the ocean, although the function of DOM in food webs and ecosystems largely depends on its composition. Here, we employ a set of molecular and optical techniques (UV–vis absorption and fluorescence spectroscopy, 1H NMR, and ultrahigh-resolution mass spectrometry) to elucidate the composition of DOM in Antarctic glacial streams and its downstream change. Glacial DOM consisted largely of a mixture of small microbial-derived biomolecules. 1H NMR analysis of bulk water revealed that these small molecules were processed downstream into more complex, structurally unrecognizable molecules. The extent of processing varied between streams. By applying multivariate statistical (compositional data) analysis of the DOM molecular data, we identified molecular compounds that were tightly associated and moved in parallel in the glacial streams. Lakes in the middle of the flow paths enhanced water residence time and allowed for both more DOM processing and production. In conclusion, downstream processing of glacial DOM is substantial in Antarctica and affects the amounts of biologically labile substrates that enter the ocean.

Published
2021

27. 南極湖沼溶存有機物の化学的多様性

Author

Kida, Morimaru, Kojima, Taichi, Fujitake, Nobuhide, Tanabe, Yukiko, Hayashi, Kentaro, and Kudoh, Sakae

Abstract

第8回極域科学シンポジウム/個別セッション：[OB] 極域生物圏12月5日（火）国立極地研究所 3階多目的会議室The Eighth Symposium on Polar Science/Ordinary sessions: [OB] Polar BiologyTue. 5 Dec./3F Multipurpose Conference Room, National Institute of Polar Research

Published
2017

28. 南極の発達したコケ群落下の土壌は明瞭な硝化活性を有する

Author

Hayashi, Kentaro, Tanabe, Yukiko, Fujitake, Nobuhide, Kida, Morimaru, Hayatsu, Masahito, and Kudoh, Sakae

Abstract

第8回極域科学シンポジウム/個別セッション：[OB] 極域生物圏12月5日（火）国立極地研究所 1階交流アトリウムThe Eighth Symposium on Polar Science/Ordinary sessions: [OB] Polar BiologyTue. 5 Dec./Entrance Hall (1st floor), National Institute of Polar Research

Published
2017

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