Scholarlink

<p>There is a growing interest in understanding the impacts of hydrologic extremes on coastal ecology and biogeochemistry. Low inflow estuaries (LIEs) are numerically significant globally and often exhibit some of the most extreme hydrologic variability witnessed in estuarine environments. This study quantified dissolved and particulate organic matter in a eutrophic LIE, Baffin Bay, TX, USA. Dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) concentrations ranged from 338 to 1650&#xa0;µM and 30 to 117&#xa0;µM, respectively, while particulate organic carbon (POC) concentrations ranged from 0 to 1138&#xa0;µM. DOC and DON concentrations fell within the top 5% of all coastal ocean observations worldwide and were roughly five times higher than the global average. Nonetheless, DOC, DON, and POC concentrations were within a range that has been observed in two similarly poorly flushed, eutrophic LIEs. DOC and POC concentrations in Baffin Bay were often higher during dry conditions compared to wet conditions, contrary to the commonly observed pattern in river-influenced estuaries. In the case of DOC, autochthonous sources were estimated to have contributed between 53 and &gt; 99% of the DOC that accumulated during dry conditions. The important role of autochthonous sources is likely attributable to both the limited flushing of Baffin Bay and the occurrence of eutrophic conditions. Results from this study enhance our understanding of organic matter dynamics in LIEs and contribute to the limited observations available from these types of estuaries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The Impact of Hydrologic Variability on Organic Matter Dynamics in a Lagoonal, Low Inflow Estuary (Baffin Bay, TX)

  • 期刊论文

  • 发表日期：

    2025年8月11日

查看全文
  • Sankar M. Sasidharan,
  • Padmanava Dash,
  • Ankita P. Katkar,
  • Michael S. Wetz

摘要

There is a growing interest in understanding the impacts of hydrologic extremes on coastal ecology and biogeochemistry. Low inflow estuaries (LIEs) are numerically significant globally and often exhibit some of the most extreme hydrologic variability witnessed in estuarine environments. This study quantified dissolved and particulate organic matter in a eutrophic LIE, Baffin Bay, TX, USA. Dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) concentrations ranged from 338 to 1650 µM and 30 to 117 µM, respectively, while particulate organic carbon (POC) concentrations ranged from 0 to 1138 µM. DOC and DON concentrations fell within the top 5% of all coastal ocean observations worldwide and were roughly five times higher than the global average. Nonetheless, DOC, DON, and POC concentrations were within a range that has been observed in two similarly poorly flushed, eutrophic LIEs. DOC and POC concentrations in Baffin Bay were often higher during dry conditions compared to wet conditions, contrary to the commonly observed pattern in river-influenced estuaries. In the case of DOC, autochthonous sources were estimated to have contributed between 53 and > 99% of the DOC that accumulated during dry conditions. The important role of autochthonous sources is likely attributable to both the limited flushing of Baffin Bay and the occurrence of eutrophic conditions. Results from this study enhance our understanding of organic matter dynamics in LIEs and contribute to the limited observations available from these types of estuaries.