Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

Martin Patrick; Moynihan Molly A.; Chen ShuangWoo Oon YeeZhou YongliNichols Robert S.Chang Kristy Y. W.Tan Ashleen S. Y.Chen Ying-HsuanRen HaojiaChen Mengli

首页> 外文期刊>Estuarine coastal and shelf science >Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

【24h】

Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

机译：Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Coastal tropical waters are experiencing rapid increases in anthropogenic pressures, yet coastal biogeochemical dynamics in the tropics are poorly studied. We present a multi-year biogeochemical time series from the Singapore Strait in Southeast Asia's Sunda Shelf Sea. Despite being highly urbanised and a major shipping port, the strait harbours numerous biologically diverse habitats and is a valuable system for understanding how tropical marine ecosystems respond to anthropogenic pressures. We observed strong seasonality driven by the semi-annual reversal of ocean currents: dissolved inorganic nitrogen (DIN) and phosphorus varied from = 0.05 mu mol l- 1 during the intermonsoons to 4 mu mol l- 1 and 0.25 mu mol l- 1, respectively, during the southwest monsoon. Si(OH)4 exceeded DIN year-round. Based on nutrient concentrations, their relationships to salinity and coloured dissolved organic matter, and the isotopic composition of NOx-, we infer that terrestrial input from peatlands is the main nutrient source. This input delivered dissolved organic carbon (DOC) and nitrogen, but was notably depleted in dissolved organic phosphorus. In contrast, particulate organic matter showed little seasonality, and the delta 13C of particulate organic carbon (-21.0 +/- 1.5 parts per thousand) is consistent with a primarily autochthonous origin. The seasonal pattern of the diel changes in dissolved O2 suggests that light availability controls primary productivity more than nutrient concentrations. However, diel changes in pH were greater during the southwest monsoon, when remineralisation of terrestrial DOC lowers the seawater buffer capacity. We conclude that terrestrial input results in mesotrophic conditions, and that the strait might undergo further eutrophication if nutrient inputs increase during seasons when light availability is high. Moreover, the remineralisation of terrestrial DOC within the Sunda Shelf Sea may enhance future ocean acidification.

著录项

来源
《Estuarine coastal and shelf science》 |2022年第5期|107855.1-107855.15|共15页
作者
Martin Patrick; Moynihan Molly A.; Chen ShuangWoo Oon YeeZhou YongliNichols Robert S.Chang Kristy Y. W.Tan Ashleen S. Y.Chen Ying-HsuanRen HaojiaChen Mengli;
展开▼
作者单位

Nanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore;

Nanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore|Nanyang Technol Univ, Interdisciplinary Grad Sch, Earth Observ Singapore, Singapore 639798, Singapore|Marine Biol Lab, Woods Hole, MA 02543 USA;

Nanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore|Kenyon Pte Ltd, Singapore 509016, SingaporeNanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore|Marine Biol Lab, Woods Hole, MA 02543 USANanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore|DHI Water & Environm S Pte Ltd, Singapore 608526, SingaporeNanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore|Nanyang Technol Univ, Singapore Ctr Environm Life Sci Engn, Singapore 637551, SingaporeNanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore|Surbana Jurong Pte Ltd, Singapore 150168, SingaporeNatl Taiwan Univ, Dept Geosci, Taipei 106, TaiwanNatl Univ Singapore, Trop Marine Sci Inst, Singapore 119227, Singapore;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类
关键词
Nutrient dynamics; Dissolved organic matter; Coastal biogeochemistry; Tropical peatland rivers; Southeast Asia;

Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

摘要

著录项

相关主题

期刊订阅