Journal article
Phosphorus Dynamics in the Water Column and Sediments of Barnegat Bay, New Jersey
Journal of coastal research, v 78(sp1)
01 Sep 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Phosphorus (P) loadings are higher in northern Barnegat Bay, New Jersey, relative to southern Bay, whereas ambient dissolved P is higher in the southern part of the Bay. This study investigated the mechanism for higher water-column P in the southern part of the Bay relative to the northern Bay. The authors hypothesized that sediments may be the source of P to the water column in the southern Bay. Water-column samples and sediment cores were collected from 20 stations along the N-S gradient of the Bay on three dates (spring, summer, and fall) in 2014-15. Benthic sediment P flux experiments were conducted under oxic and anoxic conditions. Phosphorus was sequentially extracted from sediments into five operationally defined fractions: loosely sorbed P, iron bound P, inorganic bound P, calcium bound P, and organic bound P. The results confirmed that soluble reactive P (SRP) was higher in the southern Bay (29 to 53 mu gP/L) compared to the northern Bay (below detection to 21.2 mu gP/L). Iron and inorganic bound P were the highest fractions of sediment P. Sediment total P was higher in the southern Bay stations. Benthic flux measurements indicated that sedimentary release of SRP was negligible, and no N-S gradient of P release occurred. Rather than a source of SRP to the water, the sediments were identified as a sink for P in the southern stations. The higher chlorophyll-a in the northern vs. southern Bay and lower concentration of SRP and NO2+3 in the northern vs. southern Bay indicate that hydrodynamics and water-column primary productivity, rather than sediment P dynamics, are the major drivers of the observed patterns of water-column nutrients in Barnegat Bay.
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Details
- Title
- Phosphorus Dynamics in the Water Column and Sediments of Barnegat Bay, New Jersey
- Creators
- Bhanu Paudel - Academy of Natural Sciences of Drexel UniversityNathaniel Weston - Villanova UniversityJohn O'Connor - Villanova UniversityLori Sutter - Villanova UniversityDavid Velinsky - Drexel University
- Publication Details
- Journal of coastal research, v 78(sp1)
- Publisher
- Coastal Education & Research Foundation
- Number of pages
- 10
- Grant note
- NJDEP
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES)
- Web of Science ID
- WOS:000417480200006
- Scopus ID
- 2-s2.0-85038391985
- Other Identifier
- 991019168349604721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Environmental Sciences
- Geography, Physical
- Geosciences, Multidisciplinary