Distribution of intertidal benthic algae in the vicinity of Townsville, tropical Australia

Ngan, Yinam; Price, IR

doi:10.1071/mf9800175

Cited by 8 publications

(4 citation statements)

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“…A single period of spore discharge over 24 h was commonly found, and was generally observed with taxa inhabiting either the lower eulittoral or the upper sublittoral zones (see Ngan & Price, 1980a, for details of shore zonation). In the majority of taxa investigated, maximum spore output took place between 0500 and 0900 h on the day following collection (Table VI), during the predicted flood tide period (Table IV).…”

Section: Diurnal Pattern Of Spore Dischargementioning

confidence: 99%

Periodicity of spore discharge in tropical Florideophyceae (Rhodophyta)

Ngan

Price

1983

British Phycological Journal

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Section: Diurnal Pattern Of Spore Dischargementioning

confidence: 99%

Periodicity of spore discharge in tropical Florideophyceae (Rhodophyta)

Ngan

Price

1983

British Phycological Journal

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“…The algal species recorded at Nightcliff Reef have been widely reported across the Indo-Pacific, from Tanzania (Jassund, 1976) to eastern Australia (Morrissey 1980;Ngan & Price 1980). The abundance of benthic algal species at Nightcliff Reef is likely to be seasonal with species exhibiting variable growth and dominance between wet and dry seasons (e.g.…”

Section: Resultsmentioning

confidence: 99%

Coral communities in extreme environmental conditions in the Northern Territory, Australia

Ferns¹

2016

Northern Territory Naturalist

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An extensive intertidal reef flat in the macro-tidal marine waters of the Northern Territory was chosen to investigate species composition and zonation persisting under extreme environmental conditions. Thirty-six visual belt transects were used to quantify scleractininan corals, benthic algae and other sessile invertebrates which varied in vertical and horizontal space. Thirty-four coral species were identified. Most species were represented by the family Merulinidae, with lifeform characteristics typical of species specialised in environmental tolerance to high sedimentation, turbidity and temperature (i.e. massive, sub-massive and encrusting growth forms with convex and steep sided morphologies, thick skeletal tissue and large polyps). Whilst the combination of environmental and ecological characteristics of this reef flat community can be viewed as distinctive to the Darwin region, a number of similarities can be compared to reef communities reported in extreme environments of the Arabian Gulf, Red Sea and other regions of tropical northern Australia. Ferns, Lawrance W. 2016. "Coral communities in extreme environmental conditions in the Northern Territory, Australia." Northern Territory Naturalist 27, 84-96.

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“…According to a survey of the intertidal regions at Rowes Bay and locations in the Townsville region (Ngan & Price, 1980), Sphacelaria is more abundant at low tidal elevations. Sphacelaria sp.…”

Section: Discussionmentioning

confidence: 99%

“…was the commonest algal species in the stomachs of both species. According to a survey of the intertidal regions at Rowes Bay and locations in the Townsville region (Ngan & Price, 1980), Sphacelaria is more abundant at low tidal elevations. The decrease in abundance of snapping shrimp, particularly A. edwardsii, in the upper tidal range may be the result of the much reduced abundance of Sphacelaria.…”

Section: Discussionmentioning

confidence: 99%

The distribution of two species of alpheid shrimp, Alpheus edwardsii and A. Lobidens, on a tropical beach

Corfield

Alexander

1995

J. Mar. Biol. Ass.

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Alpheus edwardsii Audouin and Alpheus lobidens de Man (Crustacea: Decapoda: Alpheidae) are two intertidal snapping shrimp that burrow in association with rocks. They are morphologically similar and are often found in the same intertidal zone. The competitive exclusion theory states that two co-existing species must partition resources. The partitioning of food items as a resource appears unlikely, as gut content analyses revealed that the two species have similar diets and the relationship of shrimp condition and shrimp density indicates that food supply was not in limited supply. Instead the two species partition the resources of space within the intertidal zone, and shelter. The two species were found to exist largely in isolation from each other. Alpheus edwardsii occurred across much of the intertidal zone. Within this range A. edwardsii were most abundant in substrata with a low proportion (<50%) of mud. These substrata are better suited to their elaborate method of burrow construction. The simpler burrow construction method of A. lobidens allows this species the potential to occupy a wide range of substratum types; however, they were found only in muddy substrata with substantial surface rock cover at tidal elevations of 1 -18 m above datum or below. The restriction of A. lobidens to this region of the intertidal zone is probably related, in part, to their physiological requirements. In regions of co-occurrence, A. lobidens were significantly smaller than A. edwardsii, and utilized smaller rocks as shelters, thus avoiding direct interspecific competition for this resource. The absence of large A. lobidens from these areas may reflect their ability to procure shelter in competition with A. edwardsii, as behavioural experiments conducted in this study found that A. edwardsii were the dominant competitors for this resource.

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Distribution of intertidal benthic algae in the vicinity of Townsville, tropical Australia

Cited by 8 publications

References 0 publications

Periodicity of spore discharge in tropical Florideophyceae (Rhodophyta)

Periodicity of spore discharge in tropical Florideophyceae (Rhodophyta)

Coral communities in extreme environmental conditions in the Northern Territory, Australia

The distribution of two species of alpheid shrimp, Alpheus edwardsii and A. Lobidens, on a tropical beach

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