Roughness-dependent removal of settled spores of the green alga Ulva (syn. Enteromorpha) exposed to hydrodynamic forces from a water jet
Roughness-dependent removal of settled spores of the green alga Ulva (syn. Enteromorpha) exposed to hydrodynamic forces from a water jet
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DOI：
10.1080/08927010410001715482
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发表时间：
2004-04-01
期刊：
影响因子：
2.7
通讯作者：
Callow, ME
中科院分区：
文献类型：
--
作者：
Granhag, LM;Finlay, JA;Callow, ME
地形特征改变了受水流影响的表面上的水动力状况。地形结构周围的水动力微环境可能会对海洋底栖生物繁殖体的补充和移除产生影响。研究了绿藻石榴(Ulva Linza(syn.)蜈蚣)对定义的地形图进行了研究。一系列地形尺寸的刻度(R-Z：25-100微米)是用浮游生物网制造的，形成了带有脊状和凹陷的图案。表面粗糙度与天然衬底和防污涂层的粗糙度相似。用校准过的水射流将孢子从表面上去除。与光滑(R-z：1)和最粗糙(R-z：100 um)的结构相比，从被测试的最小的地形结构(R-z：25um)中移除的孢子更少。与山脊上的孢子相比，在凹陷中定居的游动孢子被移除的可能性较小。表面地形和水动力相互作用的结果对暴露在波浪作用下的天然底质和船体上的防污面都有意义。讨论了地形对提高游动孢子粘附性和提供水动力避难所的可能影响。
Topographic features change the hydrodynamic regime over surfaces subjected to flow. Hydrodynamic microenvironments around topographic structures may have consequences for recruitment and removal of propagules of marine benthic organisms. The settlement and adhesion of zoospores from the green alga Ulva linza (syn. Enteromorpha linza) to defined topographies was investigated. A range of topographic size scales (R-z: 25-100 mum) was manufactured from plankton nets, creating patterns with ridges and depressions. The topographic scales span a roughness similar to that of natural substrata and antifouling coatings. Spores were removed from the surfaces by a calibrated water jet. Fewer spores were removed from the smallest topographic structure tested (R-z: 25 mum) compared to both the smooth (R-z: 1) and the roughest (R-z: 100 mum) structures. Zoospores that settled in depressions were less likely to be removed compared to spores on the ridges. The results in terms of the interaction between surface topography and hydrodynamic forces have implications for both natural substrata exposed to wave action and antifouling surfaces on ships' hulls. The possible effects of topography on increasing zoospore adhesion and offering a refuge from hydrodynamic forces are discussed.