Lateral Export of Dissolved Inorganic and Organic Carbon from a Small Mangrove Estuary with Tidal Fluctuation

被引:12
|
作者
Ohtsuka, Toshiyuki [1 ]
Onishi, Takeo [2 ]
Yoshitake, Shinpei [3 ]
Tomotsune, Mitsutoshi [4 ]
Kida, Morimaru [5 ]
Iimura, Yasuo [6 ]
Kondo, Miyuki [7 ]
Suchewaboripont, Vilanee [8 ]
Cao, Ruoming [1 ]
Kinjo, Kazutoshi [9 ]
Fujitake, Nobuhide [10 ]
机构
[1] Gifu Univ, River Basin Res Ctr RBRC, 1-1 Yanagito, Gifu, Gifu 5011193, Japan
[2] Gifu Univ, Fac Appl Biol Sci, 1-1 Yanagito, Gifu, Gifu 5011193, Japan
[3] Waseda Univ, Fac Educ & Integrated Arts & Sci, Shinjuku Ku, 2-2 Wakamatsucho, Tokyo 1628480, Japan
[4] Tamagawa Univ, Coll Agr, 6-1-1 Tamagawagakuen, Machida, Tokyo 1948610, Japan
[5] Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, Res Grp Marine Geochem, ICBM MPI Bridging Grp, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany
[6] Univ Shiga Prefecture, Sch Environm Sci, 2500 Hassaka Cho, Hikone City, Shiga 5228583, Japan
[7] Natl Inst Environm Studies NIES, Ctr Environm Measurement & Anal, 16-2 Onogawa, Tsukuba, Ibaraki 3058506, Japan
[8] Inst Promot Teaching & Technol, Bangkok 10110, Thailand
[9] Univ Ryukyus, Fac Agr, 1 Senbaru, Okinawa 9030213, Japan
[10] Kobe Univ, Grad Sch Agr Sci, Nada Ku, 1-1 Rokkodai Cho, Kobe, Hyogo 6578501, Japan
来源
FORESTS | 2020年 / 11卷 / 10期
基金
日本学术振兴会;
关键词
carbon budget; carbon cycling; dissolved inorganic carbon; dissolved organic carbon; lateral carbon flux; mangrove forest; water flow; δ C-13-DIC; DYNAMICS; CREEK; BIOGEOCHEMISTRY; ECOSYSTEMS; EMISSIONS; SEDIMENT;
D O I
10.3390/f11101041
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
The significance of aquatic lateral carbon (C) export in mangrove ecosystems highlights the extensive contribution of aquatic pathways to the net ecosystem carbon budget. However, few studies have investigated lateral fluxes of dissolved organic carbon (DOC) and inorganic carbon (DIC), partly due to methodological difficulty. Therefore, we evaluated area-based lateral C fluxes in a small mangrove estuary that only had one exit for water exchange to the coast. We sampled water from the mouth of the creek and integrated discharge and consecutive concentration of mangrove-derived C (Delta C). Then, we estimated the area-normalized C fluxes based on the inundated mangrove area. DIC and DOC concentrations at the river mouth increased during ebb tide during both summer and winter. We quantified the Delta C in the estuary using a two-component conservative mixing model of freshwater and seawater. DIC and DOC proportions of Delta C concentrations at the river mouth during ebb tide was between 34% and 56% in the winter and 26% and 42% in the summer, respectively. DIC and DOC fluxes from the estuary were estimated to be 1.36 g C m(-2) d(-1) and 0.20 g C m(-2) d(-1) in the winter and 3.35 g C m(-2) d(-1) and 0.86 g C m(-2) d(-1) in the summer, respectively. Based on our method, daily fluxes are mangrove area-based DIC and DOC lateral exports that can be directly incorporated into the mangrove carbon budget.
引用
收藏
页码:1 / 15
页数:15
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