Sedimentation in a Malaysian High Tide Tropical Delta

Coleman, James M.; Gagliano, Sherwood M.; Smith, William G.

doi:10.2110/pec.70.11.0185

Cited by 61 publications

(22 citation statements)

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“…In the Straits of Malacca the formation of mudflats is determined by the high sediment loads discharged by fluvial systems (e.g. Klang-Langat and Selangor rivers) and by the pattern of currents along coast, which are predominantly directed from SE to NW (Coleman et al 1970 , Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

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Species-area relationship and potential role as a biomonitor of mangrove communities of Malayan mudskippers

Polgar

2008

Wetlands Ecol Manage

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The rapid and extensive destruction of mangrove forests and adjacent peritidal ecosystems in the Indo-Pacific region requires the development of efficient management and conservation actions. Mudskippers (Gobiidae: Oxudercinae) are amphibious gobies that are strictly linked to mangrove forests and tropical mudflats. I recorded the presence and habitat distribution of mudskipper species in four mangrove ecosystems along the west coast of Peninsular Malaysia. Different localities host different mudskipper communities, while in each locality species are differentially distributed along the intertidal gradient. At the ecosystem level, I found a significant exponential correlation between sampled area and the species richness of these communities, consistent with the SAR hypothesis. At the habitat level, the presence of a vertical zonation along the intertidal gradient suggests the possibility of using the species living exclusively in higher or lower levels as bioindicators for habitat anthropogenic impact, respectively from the land and from the sea.

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Section: Resultsmentioning

confidence: 99%

“…1 Coastal areas of Western Peninsular Malaysia. Shaded areas: mangrove forests; stippled areas: tidal flats exposed at low tide (modified from Coleman et al 1970); large dots: study localities Museum (MSNG). More material was subsequently collected in the same areas by Dr. M.Z.…”

Section: Methodsmentioning

confidence: 99%

Species-area relationship and potential role as a biomonitor of mangrove communities of Malayan mudskippers

Polgar

2008

Wetlands Ecol Manage

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“…Within Strata B to E, topographic levels (LV), tide tables and tidal curves were used to calculate the frequency of emersion of quadrats (EM), i.e. percentage of time that quadrats were exposed over the period of study (Coleman et al 1970, Sasekumar 1974 Fig. S4 in the supplement).…”

Section: Methodsmentioning

confidence: 99%

Size variation of six species of oxudercine gobies along the intertidal zone in a Malayan coastal swamp

Polgar¹,

Bartolino²

2010

Mar. Ecol. Prog. Ser.

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Reduction in size from sea to land is a common trend of many fish species and communities, at both the intraspecific and interspecific level. Within the intertidal zone, similar trends have been described at the intraspecific level in several transient and resident fish species. Oxudercines are a group of intertidal gobies (Gobiidae: Oxudercinae) including several species, which exhibit extreme adaptations to an amphibious lifestyle. Ecomorphological and ecophysiological considerations suggest that size reduction in this group may have facilitated the adaptation to semi-terrestrial conditions. To test this hypothesis, the spatial ecology and the presence of an intra-and interspecific size gradient was investigated in an oxudercine community of a Malayan intertidal ecosystem (6 species included in 3 genera). A random stratified sampling design was adopted, and ANOVA and cluster analysis performed to describe this variation. Multivariate analyses of the quantity of environmental water were also conducted to investigate the correspondence between size and habitat terrestriality. Larger species were found in more aquatic conditions at lower topographical levels along the vertical intertidal gradient, supporting the hypothesis of an adaptive value of smaller size in more terrestrial habitats. Intraspecific variation showed more complex patterns, even if in several species smaller individuals were found in more terrestrial conditions.

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“…Studies of tide-dominated deltas that contain extensive, low-ash peat deposits are even more rare (Coleman et al, 1970;Styan and Bustin, 1983;Staub and Esterle, 1993;Hart et al, 1998). Tidal currents and surface waves in many cases play important roles in sediment dispersal and deposition in tide-dominated systems (Harris et al, 1993), but seasonal variation in discharge may well be the most important factor.…”

Section: Introductionmentioning

confidence: 99%

Seasonal sediment transport and deposition in the Rajang River delta, Sarawak, East Malaysia

Staub

Among²,

Gastaldo

2000

Sedimentary Geology

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The Holocene Rajang River delta plain, which covers an area of 6500 km 2 , has developed in a tropical, ever-wet climatic setting. Peat deposits, up to 15 m thick, occur in this delta plain. The tributary system to the delta is about 50,000 km 2 in area. Elevations exceed 2000 m in the drainage basin and hill slopes are steep. Rainfall in the region exceeds 370 cm/year, with highest rainfall levels or the "wet" season being coincident with the December-March monsoon. The monthly drainage-basin discharge is calculated to average about 3600 m 3 /s, and the discharge normally ranges from 1000 to 6000 m 3 /s. Spring tides in coastal areas range from 2.9 to 5.8 m. Tide data indicate that the tides are semidiurnal with a noticeable diurnal inequality. Vibracores recovered from bar forms in tidally influenced distributary channels contain laminated silts and sand-silt couplets that show evidence of rhythmic heterolithic stratification. Grain-size data indicate that these preserved delta plain siliciclastic sediments are the result of estuarine depositional processes that occur during intervals of reduced rainfall or the "dry" season (April-November). The number of laminae preserved per neap-spring cycle is the highest (ഡ18-20), and the average thickness is the greatest in the middle part of the delta plain. Distributary channels in this region normally contain low-salinity brackish water to freshwater. Vibracores recovered from delta front and prodelta sediments show evidence of heterolithic stratification, but rhythmicity is absent. Grain-size data indicate that preserved delta front and prodelta sediments are implaced by "wet" season processes (December-March) when fluvial flux and delta-plain erosion are at their maxima. Individual silt laminae and/or silt and sand interbeds are sometimes many centimeters thick, but average about 1 cm. These silt laminae and silt and sand interbeds or varves represent annual sedimentation events. These varves demonstrate that about 24 million MT of sediment produced by the drainage basin is deposited in the delta front and prodelta region annually. ᭧

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Sedimentation in a Malaysian High Tide Tropical Delta

Cited by 61 publications

References 0 publications

Species-area relationship and potential role as a biomonitor of mangrove communities of Malayan mudskippers

Species-area relationship and potential role as a biomonitor of mangrove communities of Malayan mudskippers

Size variation of six species of oxudercine gobies along the intertidal zone in a Malayan coastal swamp

Seasonal sediment transport and deposition in the Rajang River delta, Sarawak, East Malaysia

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