A method to assess the freshwater inflow requirements of estuaries and application to the Mtata estuary, South AfricaSpringer Science and Business Media LLC - Tập 25 - Trang 1382-1393 - 2002
J. B. Adams, G. C. Bate, T. D. Harrison, P. Huizinga, S. Taljaard, L. van Niekerk, E. E. Plumstead, A. K. Whitfield, T. H. Wooldridge
The National Water Act (Act 36 of 1998) in South Africa recognizes basic human water requirements as well as the need to sustain the country's freshwater and estuarine ecosystems in a healthy condition for present as well as future generations. In this Act, provision is made for a water reserve to be estimated prior to the authorization of water use (e.g., for agriculture, large volume residential...... hiện toàn bộ
A portable suction dredge for quantitative sampling in difficult substratesSpringer Science and Business Media LLC - Tập 2 - Trang 54-58 - 1979
Iver M. Brook
A lightweight, portable suction dredge has been used for five bottom types which usually present problems to benthic investigators. Water depth ranged from 0.25 m to 5 m. By use of a 0.25 m2 quadrat or using the suction end as a probe with the depth of penetration limited by a collar, quantitative samples were taken in coarse sand, fine flocculent mud, dense turtle grass (Thalassia testudinum), sp...... hiện toàn bộ
Wetland loss in the Northern Gulf of Mexico: Multiple working hypothesesSpringer Science and Business Media LLC - Tập 20 - Trang 1-13 - 1997
R. E. Turner
I examined four hypotheses about causes for the dramatically high coastal wetland losses (0.86% yr−1) in the northern Gulf of Mexico: an extensive dredged canal and spoil bank network, a decline in sediments in the Mississippi River during the 1950s, Mississippi River navigation and flood protection levees, and salinity changes. Natural factors contributing to these habitat changes include eustati...... hiện toàn bộ
Estuarine benthos: Long-term community structure variations, corpus Christi Bay, TexasSpringer Science and Business Media LLC - Tập 6 - Trang 126-141 - 1983
R. W. Flint, J. A. Younk
A study of the benthic communities in Corpus Christi Bay was carried out between 1974 and 1979 to identify both natural and human-induced variations in community dynamics of the benthos over a long time period of monthly samples collection. General results of the investigation were comparable to previous shorter-term studies of this estuary in respect to species list of dominant fauna, total densi...... hiện toàn bộ
Seasonal variation of the stable isotopic compositions of coastal marine plankton from Woods Hole, Massachusetts and Georges BankSpringer Science and Business Media LLC - Tập 17 - Trang 552-560 - 1994
Sam C. Wainright, Brian Fry
A study of the isotopic composition of plankton from Woods Hole Harbor was conducted to investigate seasonal variation in carbon and nitrogen stable isotopes in a shallow coastal environment. Stable isotopic ratios of carbon and nitrogen both showed temporal variation on the scale of weeks to months, with heaviest (most positive) values in summer to fall for both isotopes. Particulate organic matt...... hiện toàn bộ
Effects of salinity on NH4 + adsorption capacity, nitrification, and denitrification in Danish estuarine sedimentsSpringer Science and Business Media LLC - Tập 22 - Trang 21-30 - 1999
Søren Rysgaard, Peter Thastum, Tage Dalsgaard, Peter Bondo Christensen, Niels P. Sloth
The regulatory effect of salinity on nitrogen dynamics in estuarine sediments was investigated in the Randers Fjord estuary, Denmark, using sediment slurries and intact sediment cores and applying 15N-isotope techniques. Sediment was sampled at three representative stations varying in salinity, and all experiments were run at 0‰, 10‰, 20‰, and 30‰. The sediment NH4
+ adsorp...... hiện toàn bộ
Food availability and the feeding ecology of ichthyofauna of a Ria Formosa (South Portugal) water reservoirSpringer Science and Business Media LLC - Tập 26 - Trang 938-948 - 2003
Sofia Gamito, Ana Pires, Cristina Pita, Karim Erzini
The feeding habits of several fish species in a water reservoir of the Ria Formosa, Portugal, that has similar ecological characteristics to the outside tidal channels, were studied and compared with food availability. The gilthead seabream (Sparus aurata), the most abundant fish species, mainly selected gastropods and bivalves, although occasionally fish and small crustaceans such as tanaids, ost...... hiện toàn bộ