Quantifying the distribution and influence of non-uniform bed properties in shallow coastal bays

2015 ◽  
Vol 13 (12) ◽  
pp. 746-762 ◽  
Author(s):  
Patricia L. Wiberg ◽  
Joel A. Carr ◽  
Ilgar Safak ◽  
Arachaporn Anutaliya
Keyword(s):  
Coastal Bays ◽  
Shallow Coastal Bays

Wave Attenuation by Oyster Reefs in Shallow Coastal Bays

2018 ◽  
Vol 42 (2) ◽  
pp. 331-347 ◽  
Author(s):  
Patricia L. Wiberg ◽  
Sara R. Taube ◽  
Amy E. Ferguson ◽  
Marnie R. Kremer ◽  
Matthew A. Reidenbach
Keyword(s):  
Wave Attenuation ◽  
Oyster Reefs ◽  
Coastal Bays ◽  
Shallow Coastal Bays

scholarly journals Microphytobenthos and benthic macroalgae determine sediment organic matter composition in shallow photic sediments

2013 ◽  
Vol 10 (2) ◽  
pp. 2791-2834 ◽  
Author(s):  
A. K. Hardison ◽  
E. A. Canuel ◽  
I. C. Anderson ◽  
C. R. Tobias ◽  
B. Veuger ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Organic Matter ◽  
Sediment Organic Matter ◽  
Common Symptom ◽  
Nutrient Loads ◽  
Ambient Light ◽  
Mole Percent ◽  
Coastal Bays ◽  
Shallow Coastal Bays ◽  
Benthic Macroalgae

Abstract. Benthic macroalgae are a common symptom of eutrophication in shallow coastal bays as a result of increased nutrient loads. Microphytobenthos (MPB) and benthic macroalgae play an important role in system metabolism within shallow coastal bays. However, their independent and interactive influences on sediment organic matter (SOM) are not well understood. We investigated the influence of macroalgae and MPB on SOM quantity and quality in an experimental mesocosm system using bulk and molecular level (total hydrolyzable amino acids, THAA; phospholipid linked fatty acids, PLFA; pigment) analyses. Our experiment used an incomplete factorial design made up of two factors, each with two levels: (1) light (ambient vs. dark) and (2) macroalgae (presence vs. absence of live macroalgae). Over the course of the 42-day experiment, total organic carbon (TOC) and total nitrogen (TN) increased under ambient light by 173 ± 14 and 141 ± 7%, respectively, compared to in the dark (78 ± 29 and 39 ± 22%). THAA comprised a substantial fraction of SOM (∼16% of TOC, 35% of TN) and followed TOC and TN accumulation patterns. Mole percent composition of the THAA pool indicated that SOM was composed of more labile organic material (e.g. L-glutamic acid, phenylalanine) under ambient light conditions while SOM in dark treatments was more degraded, with higher proportions of glycine and D-alanine. PLFA content, which represents viable biomass, made up ∼1% of TOC and contained high levels of algal fatty acids in the light, particularly PLFA derived from diatoms. In the presence of MPB (i.e. light and macroalgae treatments), SOM lability increased, resulting in the observed increases in bacterial PLFA concentrations. Macroalgae, which were added to half of the light treatments, decreased SOM accumulation compared to light treatments without macroalgae, with TOC and TN increasing by only 130 ± 32 and 94 ± 24 %, respectively. This decrease likely resulted from shading by macroalgae, which reduced production of MPB. The presence of macroalgae decreased SOM lability as well, which resulted in diminished buildup of bacterial biomass. By the final day of the experiment, PCA analyses revealed that sediment composition in treatments with macroalgae were more similar to dark treatments and less similar to light treatments without macroalgae. Overall MPB and benthic macroalgae fundamentally altered SOM quality and quantity, which may have notable ecological consequences for shallow-water systems such as increased hypoxia/anoxia, sulfide accumulation, enhanced mineralization and/or stimulated denitrification.

Controls on residence time and exchange in a system of shallow coastal bays

2015 ◽  
Vol 97 ◽  
pp. 7-20 ◽  
Author(s):  
I. Safak ◽  
P.L. Wiberg ◽  
D.L. Richardson ◽  
M.O. Kurum
Keyword(s):  
Residence Time ◽  
Coastal Bays ◽  
Shallow Coastal Bays

scholarly journals Eutrophication in shallow coastal bays and lagoons: the role of plants in the coastal filter

2007 ◽  
Vol 348 ◽  
pp. 1-18 ◽  
Author(s):  
KJ McGlathery ◽  
K Sundbäck ◽  
IC Anderson
Keyword(s):  
Coastal Bays ◽  
Shallow Coastal Bays

scholarly journals Analysis of Estrogenic Activity in Maryland Coastal Bays Using the MCF-7 Cell Proliferation Assay

2021 ◽  
Vol 18 (12) ◽  
pp. 6254
Author(s):  
Rehab Elfadul ◽  
Roman Jesien ◽  
Ahmed Elnabawi ◽  
Paulinus Chigbu ◽  
Ali Ishaque
Keyword(s):  
Cell Proliferation ◽  
Estrogenic Activity ◽  
Landing Site ◽  
Negative Control ◽  
Proliferation Assay ◽  
Negative Effects ◽  
Cell Proliferation Assay ◽  
Coastal Bays ◽  
Maryland Coastal Bays ◽  
Mcf 7

Contaminants of Emerging Concern (CECs) with estrogenic or estrogenic-like activity have been increasingly detected in aquatic environments and have been an issue of global concern due to their potential negative effects on wildlife and human health. This study used the MCF-7 cell proliferation assay (E-Screen) to assess the estrogenic activity profiles in Maryland Coastal Bays (MCBs), a eutrophic system of estuaries impacted by human activities. Estrogenic activity was observed in all study sites tested. Water samples from MCBs increased MCF-7 cell proliferation above the negative control from 2.1-fold at site 8, located in Sinepuxent Bay close to the Ocean City Inlet, to 6.3-fold at site 6, located in Newport Bay. The proliferative effects of the sediment samples over the negative control ranged from 1.9-fold at the Assateague Island National Seashore site to 7.7-fold at the Public Landing site. Moreover, elevated cell proliferation (p < 0.05) was observed when cells were co-exposed with 17ß-Estradiol (E2), while reduction in cell proliferation was observed when cells were co-exposed with the antagonist ICI 182, 780 suggesting that cell proliferative effects were primarily mediated by the estrogen receptor (ER). These results suggest the occurrence of some estrogenic or hormonal-like compounds in the MCBs and are consistent with our previous findings based on vitellogenin analyses.

A Simple Index of Trophic Status in Estuaries and Coastal Bays Based on Measurements of pH and Dissolved Oxygen

2012 ◽  
Vol 36 (1) ◽  
pp. 158-173 ◽  
Author(s):  
Shane O’Boyle ◽  
Georgina McDermott ◽  
Tone Noklegaard ◽  
Robert Wilkes
Keyword(s):  
Dissolved Oxygen ◽  
Trophic Status ◽  
Coastal Bays ◽  
Simple Index
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