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

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.

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

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

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management
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