Vegetation structure and diversity components of a Fraser estuary tidal marsh

1982 ◽  
Vol 60 (4) ◽  
pp. 440-451 ◽  
Author(s):  
Gary E. Bradfield ◽  
Glendon L. Porter
Keyword(s):  
Vegetation Structure ◽  
Festuca Arundinacea ◽  
Tidal Marsh ◽  
River Estuary ◽  
Hydrological Regime ◽  
Reciprocal Averaging ◽  
Marsh Vegetation ◽  
Vegetation Zones ◽  
Components Analysis ◽  
Menyanthes Trifoliata

Vegetation data from a predominantly freshwater-influenced tidal marsh in the Fraser River estuary are analysed to investigate different properties of community structure. Three main vegetation zones are recognized, dominated respectively by Carex lyngbyei, Festuca arundinacea, and Menyanthes trifoliata. The zones occupy parts of the marsh which differ primarily in hydrological regime: the Carex zone occurs in regularly flooded and drained areas, mainly along tidal creeks; the Festuca zone occurs on infrequently flooded levees; the Menyanthes zone occurs in areas of impeded drainage, mainly between tidal creeks.Principal components analysis and reciprocal averaging gave similar results except for a 90° rotation of ordination axes. The combined results from cluster analysis and ordination give a useful summary of the marsh vegetation structure. The evaluation of various diversity measures including species richness, species density, beta diversity, and species evenness provided a useful basis for making comparisons and helped to focus attention on factors influencing community development.

Hydrological Regime and Lithodynamic Processes in the Mezen River Estuary

Oceanology ◽  
2018 ◽  
Vol 58 (4) ◽  
pp. 593-600
Author(s):  
N. A. Rimskiy-Korsakov ◽  
V. N. Korotaev ◽  
V. V. Ivanov ◽  
A. A. Pronin ◽  
N. A. Demidenko
Keyword(s):  
River Estuary ◽  
Hydrological Regime

The Potential of Fossil Mammal Middens as Indicators of Vegetation History in Central Australia

1991 ◽  
Vol 39 (3) ◽  
pp. 305 ◽  
Author(s):  
SL Berry
Keyword(s):  
Vegetation History ◽  
Plant Macrofossil ◽  
Radiocarbon Age ◽  
North East ◽  
Vegetation Zones ◽  
History Of ◽  
Vertical Slice ◽  
Components Analysis ◽  
Central Australia ◽  
Weak Tendency

The plant macrofossil contents of two fossil mammal middens were investigated. Midden MS was collected from near Mt Swan, 200 km north-east of Alice Springs in central Australia. The vegetation in this region is predominantly grassland scattered with low trees. Midden KS was collected from Kathleen Springs, 240 km west-south-west of Alice Springs. The flora in this locality is dominated by forbs and chenopods. Midden KS had a radiocarbon age of 1700 years BP at the top and 3500 years BP at the bottom. Most of the plant taxa in each midden were components in the flora of the vegetation zones currently surrounding that midden. However, the two middens, collected from different vegetation zones, shared only 33% of taxa. Similarly, only 24% of species were common to the July 1987 vegetation at the two localities. A vertical slice of midden KS was cut into 25 subsamples. No progressive change of subsample plant macrofossil assemblage with depth could be detected by Principal Components Analysis. However, there was a weak tendency for subsamples from the same level in the midden to be similar. It was concluded that mammal middens are potentially useful indicators of the vegetation history of central Australia.

scholarly journals Organic matter sources for tidal marsh sediment over the past two millennia in the Minho River estuary (NW Iberian Peninsula)

2012 ◽  
Vol 53 ◽  
pp. 16-24 ◽  
Author(s):  
J.M. De la Rosa ◽  
M.F. Araújo ◽  
J.A. González-Pérez ◽  
F.J. González-Vila ◽  
A.M. Soares ◽  
...  
Keyword(s):  
Organic Matter ◽  
Iberian Peninsula ◽  
Tidal Marsh ◽  
River Estuary ◽  
Marsh Sediment ◽  
Organic Matter Sources ◽  
The Past ◽  
Minho River
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