Article ; Online: Azoic sediments and benthic foraminifera: Environmental quality in a subtropical coastal lagoon in the gulf of California.
2023 Volume 244, Page(s) 117924
Abstract: Marine transitional environments play an important role in human sustainability. Around these ecosystems, coastal lagoons are subject to high anthropogenic pressure from population growth. The increased demand for goods and services is associated with ... ...
| Abstract | Marine transitional environments play an important role in human sustainability. Around these ecosystems, coastal lagoons are subject to high anthropogenic pressure from population growth. The increased demand for goods and services is associated with the elevated discharge of untreated and treated wastewater into lagoon systems. The absence of benthic organisms in lagoon environments has been linked to extreme natural conditions and severe anthropogenic impact at both spatial and temporal scales. However, the mechanisms that lead to the presence of azoic sediments in lagoon environments have yet to be studied. This study aimed to determine the vertical variability of textural groups, geochemistry, and benthic foraminiferal fauna to understand how natural and anthropogenic components generate a vertical sediment sequence with low or absent benthic foraminifera in a subtropical coastal lagoon in the southwestern end of the Gulf of California. A 41 cm-long sediment core was collected from La Paz Lagoon at a 1-m depth. The core was sectioned every centimeter, and sediment subsamples were dried and homogenized for grain size, calcium carbonate, elemental and isotopic carbon and nitrogen analyses, and benthic foraminifera quantification. Muds with fine sands towards the core's base characterized the sedimentary sequence. Organic carbon and total nitrogen increased from the base (1.4% and 0.06%, respectively) to the core-top (CT, 3.0% and 0.14%, respectively), significant from the 27 cm interval. Calcium carbonate content was very low (<0.8%). The relationship of δ |
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| MeSH term(s) | Humans ; Ecosystem ; Geologic Sediments/analysis ; Foraminifera/chemistry ; Sewage ; Environmental Monitoring ; Water Pollutants, Chemical/analysis ; Calcium Carbonate/analysis ; Carbon/analysis ; Nitrogen/analysis |
| Chemical Substances | Sewage ; Water Pollutants, Chemical ; Calcium Carbonate (H0G9379FGK) ; Carbon (7440-44-0) ; Nitrogen (N762921K75) |
| Language | English |
| Publishing date | 2023-12-14 |
| Publishing country | Netherlands |
| Document type | Journal Article |
| ZDB-ID | 205699-9 |
| ISSN | 1096-0953 ; 0013-9351 |
| ISSN (online) | 1096-0953 |
| ISSN | 0013-9351 |
| DOI | 10.1016/j.envres.2023.117924 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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