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A method to assess the freshwater inflow requirements of estuaries and application to the Mtata estuary, South Africa
Springer 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 substrates
Springer 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
Estuarine benthos: Long-term community structure variations, corpus Christi Bay, Texas
Springer 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 abundance and vertical distribution of crab larvae in Delaware Bay
Springer Science and Business Media LLC - Tập 5 - Trang 197-202 - 1982
Anna I. Dittel R., Charles E. Epifanio
Larvae of 15 species or genera of crabs were collected and identified during a six month (May 26 to October 28, 1978) study in the mouth of Delaware Bay. Seasonal abundance and vertical distribution of each species were investigated. Most species studied had peak abundance in July and August except forCancer irroratus andOvalipes ocellatus which showed peak occurrence in May and June, respectively...... hiện toàn bộ
Fish biomass estimates from the littoral zone of an estuarine coastal lake
Springer Science and Business Media LLC - Tập 16 - Trang 280-289 - 1993
Alan K. Whitefield
The fish community of Swartvlei, a southern African coastal lake, was sampled using gill and lift nets. A primary aim of the research was to determine the fish biomass of the lake shelf region as well as the distribution patterns of marine species which utilize this estuarine system as a nursery and/or foraging area. The catch per unit effort of fishes was more than three times higher in the litto...... hiện toàn bộ
Filtration of Hudson River water by the zebra mussel (Dreissena polymorpha)
Springer Science and Business Media LLC - Tập 19 - Trang 824-832 - 1996
Hudson A. Roditi, Nina F. Caraco, Jonathan J. Cole, David L. Strayer
Zebra mussels (Dreissena polymorpha) graze on phytoplankton, and decreased phytoplankton concentrations have been associated with zebra mussels in lakes. It is not known, however, how the zebra mussel will affect phytoplankton in turbid systems such as rivers and the freshwater portions of estuaries. To determine whether zebra mussels can effectively remove phytoplankton in these turbid systems, a...... hiện toàn bộ
Phragmites and environmental management: A question of values
Springer Science and Business Media LLC - - 2003
David F. Ludwig, Timothy J. Iannuzzi, Anthony N. Esposito
Fluxes of organic carbon in Manukau Harbour, New Zealand
Springer Science and Business Media LLC - Tập 21 - Trang 560-570 - 1998
W. N. Vant, M. M. Gibbs, K. A. Safi, S. F. Thrush
We collated information on the sources and sinks of organic carbon in Manukau Harbour, a shallow temperate estuary. Two contrasting inner harbor regions were considered; the northern region, which is urbanized and receives a major load of sewage wastewater, and the southern region, where allochthonous inputs are dominated by the runoff from small rural streams. Although high levels of dissolved ni...... hiện toàn bộ
Toward new paradigms in coastal resource management: Linkages and institutional effectiveness
Springer Science and Business Media LLC - Tập 19 - Trang 320-335 - 1996
Ronald C. Baird
Explosive population growth is expected to continue in coastal regions, and growth rates many times the national average are expected in many coastal counties in the next two decades. Most shallow-water marine habitats now exhibit “stress” from human activities and linkages between adverse environmental impacts and coastal development are apparent. These linkages are complex, often not well unders...... hiện toàn bộ
Coastal wetland subsidence arising from local hydrologic manipulations
Springer Science and Business Media LLC - Tập 27 - Trang 265-272 - 2004
R. Eugene Turner
Twenty-three estimates of soil subsidence rates arising under the influence of local hydrologic changes from flap-gates, weirs, dikes, and culverts in tidal wetlands were compared to 75 examples of subsidence in drained agricultural wetlands. The induced subsidence rates from these hydrologic modifications in tidal wetlands can continue for more than 100 years, and range between 1.67 to 0.10 cm yr...... hiện toàn bộ
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