Effects on algal density of substrate roughness and sediment

Shi Chao; Liang Zhenlin; Mei Junxue

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Shi Chao, Liang Zhenlin, Mei Junxue. Effects on algal density of substrate roughness and sediment[J]. Haiyang Xuebao, 2016, 38(10): 105-112.

Citation:

Shi Chao, Liang Zhenlin, Mei Junxue. Effects on algal density of substrate roughness and sediment[J]. Haiyang Xuebao, 2016, 38(10): 105-112.

Shi Chao, Liang Zhenlin, Mei Junxue. Effects on algal density of substrate roughness and sediment[J]. Haiyang Xuebao, 2016, 38(10): 105-112.

Citation:

Shi Chao, Liang Zhenlin, Mei Junxue. Effects on algal density of substrate roughness and sediment[J]. Haiyang Xuebao, 2016, 38(10): 105-112.

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Effects on algal density of substrate roughness and sediment

Marine College, Shandong University(Weihai), Weihai 264209, China

Received Date: 2016-03-07

Abstract

Abstract

It has been proved that there are more algal spores settled on rough surface than on smooth surface. However, the effect of surface roughness on algal density has not been tested. In this study, two substrate material NYLON and PMMA were suspended in the sea to get algal propagules attaching and developing. Densities of four species of seaweeds Polysiphonia urceolata, Urospora penicilliformis, Punctaria latifolia and Chaetomorpha antennina were counted on 6 different roughness surfaces. The ANOVA show that there is significantly less sporelings on smooth surface (without depression) than on any rough surface (with any of six densities of depression). However, different roughness on substrate surface has no significant impact on seaweed density. In the experiment in a greenhouse with filtered seawater, surface roughness on NYLON substrate significantly impact sporeling density of Laminaria japonica. However, when the substrate with Laminaria japonica sporelings were transferred and suspended into the sea for 8 days, most sporelings were removed and the roughness had no significant impact on the algal density. The possible effects of zooplankton grazing and hydrodynamic forces in the sea decreasing algal adhesion are discussed. 3 types of sediment, sea mud, sterial-sea-mud and diatom were settled on substrate surface to test the affect on algal density. The results show that the affect of sediment and roughness and the interaction between them on algal density depends on the algal species and substrate materials.
- substrate,
- roughness,
- algal density,
- sediment

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References(19)

References

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