Universidad Peruana Cayetano Heredia

Tidally driven sulfidic conditions in Peruvian mangrove sediments

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dc.contributor.author Perez, Alexander
dc.contributor.author Gutierrez Aguilar, Dimitri Alexey
dc.contributor.author Saldarriaga, Maritza S.
dc.contributor.author Sanders, Christian J.
dc.date.accessioned 2018-12-01T00:04:16Z
dc.date.available 2018-12-01T00:04:16Z
dc.date.issued 2018
dc.identifier.uri https://hdl.handle.net/20.500.12866/4261
dc.description.abstract The seasonal influence of tidal regimes on sulfidic conditions was studied in intertidal environments from a mangrove estuary in Northern Peru. Along two sampling stations, creek water and sediment cores were collected during the dry and wet seasons at all tidal phases (ebb, low, flow, and high tides). Physical-chemical parameters were measured in the creek water (temperature, salinity, pH, Eh, and DO), whereas pH, redox potential (Eh), and total organic matter contents were obtained from the sediment cores. In addition, total dissolved sulfide content a (H2S, HS-, H2-) was measured from sediment pore water. During the dry and wet seasons, the creek water pH, Eh, and dissolved oxygen were lowest in low tide, whereas oxygenated conditions and higher pH and Eh values prevailed in high tide. The total organic matter content in sediments was higher during the dry season, with the highest contents observed in the seaward station. Higher average aH(2)S (landward station, 243.1 +/- 234.9 mu M L-1; seaward station, 544.9 +/- 174.4 mu M L-1) were noted during wet season compared to dry season (landward station, 5.3 +/- 4.5 mu M L-1; seaward station, 430.2 +/- 435.1 mu M L-1). These aH(2)S contents increased towards the bottom of the sediment column, reflecting the anaerobic decomposition of the organic matter and sulfate reduction. This study provides insight to the geochemical dynamics of intertidal mangrove sediments that are sensitive to fluctuating reducing and sulfidic conditions, oscillating at time scales of minutes to hours. en_US
dc.language.iso eng
dc.publisher Springer
dc.relation.ispartofseries Geo-marine Letters
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject anaerobic decomposition en_US
dc.subject biochemical oxygen demand en_US
dc.subject biogeochemistry en_US
dc.subject biological materials en_US
dc.subject dissolved oxygen en_US
dc.subject dissolved sulfide en_US
dc.subject drought en_US
dc.subject dry and wet seasons en_US
dc.subject mangrove sediments en_US
dc.subject organic compounds en_US
dc.subject physical-chemical parameters en_US
dc.subject Redox reactions en_US
dc.subject salinity measurement en_US
dc.subject sediment pore water en_US
dc.subject sedimentation en_US
dc.subject sediments en_US
dc.subject sulfate reduction en_US
dc.subject sulfur compounds en_US
dc.subject total organic matter en_US
dc.title Tidally driven sulfidic conditions in Peruvian mangrove sediments en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1007/s00367-018-0549-3
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.11
dc.relation.issn 1432-1157


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