Determining the effects of freshwater inflow on benthic macrofauna in the Caloosahatchee Estuary, Florida

2015 ◽  
Vol 12 (3) ◽  
pp. 529-539 ◽  
Author(s):  
Terence A Palmer ◽  
Paul A Montagna ◽  
Robert H Chamberlain ◽  
Peter H Doering ◽  
Yongshan Wan ◽  
...  
Keyword(s):  
Benthic Macrofauna ◽  
Freshwater Inflow ◽  
Caloosahatchee Estuary

Oil pollution studies of the Solbergstrand mesocosms

1987 ◽  
Vol 316 (1181) ◽  
pp. 641-654 ◽  
Keyword(s):  
Dominant Species ◽  
Oil Pollution ◽  
Benthic Communities ◽  
Ascophyllum Nodosum ◽  
Diesel Oil ◽  
Benthic Macrofauna ◽  
Sediment Chemistry ◽  
Littorina Littorea ◽  
Species Structure ◽  
Laminaria Digitata

Two medium-scale ecosystems (mesocosms) were built on the Oslofjord: one a hard-bottom intertidal system and the other a subtidal soft-sediment system. The hard-bottom mesocosm consists of four basins, two controls and two which were dosed with diesel-oil (129 μg 1 -1 a high oil (HO) dose and 29 μg 1 -1 a low oil (LO) dose). Both oil doses caused high mortality of Mytilus edulis and growth was reduced in the macroalgae Ascophyllum nodosum and Laminaria digitata . Recruitment of Littorina littorea was also affected by oil so that populations declined over time. Subtidal benthic communities have been established in the mesocosm and show variations in sediment chemistry within the range found in the field. Although recruitment of benthic macrofauna is reduced, dominant species and species structure remain closely similar to that in the field over six months. Bioturbation effects studied in the mesocosm have shown the important influence of large, rare species in structuring benthic communities, a finding which would not be possible in nature by diving or by the use ofsubmersibles. Preliminary results from a community taken from 200 m depth and established in the mesocosm suggest that it is now possible to do detailed manipulation experiments on communities simulating the whole continental shelf.

Carbon-Isotope, Diatom, and Pollen Evidence for Late Holocene Salinity Change in a Brackish Marsh in the San Francisco Estuary

2001 ◽  
Vol 55 (1) ◽  
pp. 66-76 ◽  
Author(s):  
Roger Byrne ◽  
B. Lynn Ingram ◽  
Scott Starratt ◽  
Frances Malamud-Roam ◽  
Joshua N. Collins ◽  
...  
Keyword(s):  
San Francisco ◽  
High Salinity ◽  
Carbon Isotopic Composition ◽  
Brackish Marsh ◽  
San Francisco Estuary ◽  
Freshwater Inflow ◽  
Water Diversion ◽  
Freshwater Flow ◽  
Low Salinity ◽  
Carbon Isotopic

AbstractAnalysis of diatoms, pollen, and the carbon-isotopic composition of a sediment core from a brackish marsh in the northern part of the San Francisco Estuary has provided a paleosalinity record that covers the past 3000 yr. Changes in marsh composition and diatom frequencies are assumed to represent variations in freshwater inflow to the estuary. Three periods of relatively high salinity (low freshwater inflow) are indicated, 3000 to 2500 cal yr B.P., 1700 to 730 cal yr B.P., and ca. A.D. 1930 to the present. The most recent period of high salinity is primarily due to upstream storage and water diversion within the Sacramento–San Joaquin watershed, although drought may also have been a factor. The two earlier high-salinity periods are likely the result of reduced precipitation. Low salinity (high freshwater flow) is indicated for the period 750 cal yr B.P. to A.D. 1930.

scholarly journals Influence of benthic macrofauna community shifts on ecosystem functioning in shallow estuaries

2014 ◽  
Vol 1 ◽  
Author(s):  
Erik Kristensen ◽  
Matthieu Delefosse ◽  
Cintia O. Quintana ◽  
Mogens R. Flindt ◽  
Thomas Valdemarsen
Keyword(s):  
Ecosystem Functioning ◽  
Benthic Macrofauna ◽  
Community Shifts ◽  
Shallow Estuaries ◽  
Macrofauna Community
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