Co-occurring and opposing freshwater inflow effects on phytoplankton biomass, productivity and community composition of Galveston Bay, USA

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dc.authoridRoelke, Daniel/0000-0002-3166-3793
dc.contributor.authorRoelke, Daniel L.
dc.contributor.authorLi, Hsiu-Ping
dc.contributor.authorHayden, Natanya J.
dc.contributor.authorMiller, Carrie J.
dc.contributor.authorDavis, Stephen E.
dc.contributor.authorQuigg, Antonietta
dc.contributor.authorBuyukates, Yesim
dc.date.accessioned2025-01-27T20:25:07Z
dc.date.available2025-01-27T20:25:07Z
dc.date.issued2013
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractFreshwater inflow effects on phytoplankton have long interested aquatic ecologists. More recently, timing and magnitude of inflow events have been a focus as they can be strong drivers of phytoplankton diversity and productivity. In the present research, we empirically and theoretically explored the effects of inflow events on phytoplankton of Galveston Bay, Texas, a bay system whose freshwater inflow arises primarily from 2 rivers, the San Jacinto and Trinity. We found that conditions in the upper regions of Galveston Bay adjacent to these rivers had opposing influences on phytoplankton. In the region near the San Jacinto River, inflows mostly stimulated biomass and productivity, while in the region near the Trinity River, inflows had the opposite effect. This suggested that the phytoplankton reproductive growth rate was at times nutrient limited near the San Jacinto River and that population growth responded rapidly to nutrient loadings. This also suggested that population growth was controlled at times by other processes near the Trinity River, thereby negating the effects of nutrient loadings. Decreased phytoplankton biomass occurred in this region due, in part, to hydraulic displacement. These co-occurring and opposing inflow effects extended into the mid- and lower bay regions, but the extension varied in time and location with no seasonal trend. Such observations underscore the challenges of predicting system responses to altered inflows. Phytoplankton composition was also affected by inflows, and some taxonomic trends were regionally specific. Attributes of phytoplankton relating to use of alternative sources of nutrition, differential growth rates and immigration of euryhaline species from rivers likely influenced the spatiotemporal distribution of taxa.
dc.description.sponsorshipTexas Sea Grant Program (DOC-NOAA) [NA86RG0058]; National Water Resources Institute [USGS 502229-5232]; Galveston Bay Estuary Program [GBEP 582-4-65034]
dc.description.sponsorshipWe are grateful to J. Pinckney, University of South Carolina, for photopigment quantification. We are also grateful to anonymous reviewers who provided valuable comments on a previous iteration of this paper. This research was funded, in part, by the Texas Sea Grant Program (DOC-NOAA, NA86RG0058), the National Water Resources Institute (USGS 502229-5232) and the Galveston Bay Estuary Program (GBEP 582-4-65034).
dc.identifier.doi10.3354/meps10182
dc.identifier.endpage76
dc.identifier.issn0171-8630
dc.identifier.issn1616-1599
dc.identifier.scopus2-s2.0-84875144527
dc.identifier.scopusqualityQ1
dc.identifier.startpage61
dc.identifier.urihttps://doi.org/10.3354/meps10182
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22436
dc.identifier.volume477
dc.identifier.wosWOS:000315953300006
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherInter-Research
dc.relation.ispartofMarine Ecology Progress Series
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectFreshwater inflows
dc.subjectPhytoplankton biomass
dc.subjectPrimary productivity
dc.subjectInorganic nutrients
dc.titleCo-occurring and opposing freshwater inflow effects on phytoplankton biomass, productivity and community composition of Galveston Bay, USA
dc.typeArticle

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