Do Singapore’s seawalls host non-native marine molluscs?
Do Singapore’s seawalls host non-native marine molluscs?
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新加坡的海堤是否栖息着非本地海洋软体动物？
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
P. Todd
中科院分区：
文献类型：
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作者：
Wenzhuo Tan;L. H. Loke;D. Yeo;S. Tan;P. Todd
由于各种原因，海洋城市化和人工海岸结构（如海堤）的建设与非本地海洋物种的传播有关，最常见的原因是海堤为外来殖民提供了无人居住的生态位。如果城市化伴随着航运的增加，那么这也可能是一个因素，即由于通过船体和/或压载水迁移到其本地范围之外，非本地物种的繁殖压力增加。新加坡的海岸线占海堤的60%以上，是世界上最繁忙的港口之一，因此极易受到外来海洋物种的入侵。本研究的目的是调查在新加坡海堤上发现的本地、非本地和隐生软体动物。对新加坡周围的七个海堤遗址进行了调查，发现的所有标本要么是印度太平洋物种，要么是来源不明的物种。为了确定印度洋-太平洋地区是否存在潜在的外来物种，从文献资料中收集了软体动物物种的历史、生物地理、可探测性、人类亲缘性、入侵途径、生物学、生态学、生活史、史前、进化和遗传等属性。仅鉴定出一个“可能引进”的物种，即1833年（腹足目）的Siphonaria guamensis Quoy and Gaimard。其余种类包括41种新加坡本地种和23种隐源种。这项研究的结果增加了越来越多的文献，表明与普遍的假设相反，新加坡的非本地海洋物种的发生率非常低。
Marine urbanization and the construction of artificial coastal structures such as seawalls have been implicated in the spread of non-native marine species for a variety of reasons, the most common being that seawalls provide unoccupied niches for alien colonisation. If urbanisation is accompanied by a concomitant increase in shipping then this may also be a factor, i.e. increased propagule pressure of non-native species due to translocation beyond their native range via the hulls of ships and/or in ballast water. Singapore is potentially highly vulnerable to invasion by non-native marine species as its coastline comprises over 60% seawall and it is one of the world’s busiest ports. The aim of this study is to investigate the native, non-native, and cryptogenic molluscs found on Singapore’s seawalls. Seven seawall sites around Singapore were surveyed and all specimens found were either Indo-Pacific species or of unknown origin. To determine whether there were potential non-natives from within the IndoPacific, a set of attributes concerning the history, biogeography, detectability, human affinity, invasion pathway, biology, ecology, life-history, pre-history, evolution and genetics of mollusc species was collected from available literature. Only one “possibly introduced” species, Siphonaria guamensis Quoy and Gaimard, 1833 (Gastropoda), was identified. The remaining species consisted of 41 native to Singapore and 23 cryptogenic species. The results from this study add to the increasing pool of literature showing that, contrary to widespread assumption, there is a very low occurrence of non-native marine species in Singapore.