Testing latitudinal patterns of tidepool fish assemblages: local substrate characteristics affect regional-scale trends
Testing latitudinal patterns of tidepool fish assemblages: local substrate characteristics affect regional-scale trends
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DOI：
10.1007/s10750-013-1768-2
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发表时间：
2014-07-01
期刊：
影响因子：
2.6
通讯作者：
Tokeshi, Mutsunori
中科院分区：
文献类型：
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作者：
Arakaki, Seiji;Tsuchiya, Makoto;Tokeshi, Mutsunori
我们测试了岩石潮间带鱼类在区域尺度上的纬度分布格局和群落结构与当地环境因素，特别是底物特征的关系。数据来源于对日本西南部约1000公里(北纬24A°03‘-北纬32A°45’)约1000公里的36个海岸进行的密集实地观测。虽然单位面积上的科、属、种和个体的数量随着纬度的增加而减少，但这取决于基质类型：具有非石灰岩基质的地点往往比同一纬度的石灰岩地点拥有更多的数量。在纬度梯度较弱的地点，两个优势科(斑潜蝇科和戈壁蜂科)的相对丰度不同。在大多数常见的潮间带鱼类中观察到了特定物种的纬度分布趋势，超过一半的物种表现出依赖于底物的变化。九州岛和琉球岛之间以及石灰岩和非石灰岩遗址之间的物种组成明显不同。因此，我们的结果清楚地表明，潮汐池鱼群落的区域尺度纬度趋势部分取决于当地的环境特征(底物类型)。考虑到了黑潮和其他因素的影响，包括可能有助于改变观测到的纬度模式的物种相互作用。
We tested the regional-scale latitudinal patterns of occurrence and community structure of rocky tidepool fishes in relation to local environmental factors, particularly substrate characteristics. Data were derived from intensive field observations conducted on 36 shore sites spread across ca. 1,000 km north-south (24A degrees 03'N-32A degrees 45'N) in the south-western Japan. While numbers of families, genera, species and individuals per unit area decreased with latitude, these were dependent on substrate types: sites with non-limestone rock substrates tended to harbour larger numbers than limestone sites at the same latitude. Relative abundances of two dominant families (Blenniidae and Gobiidae) varied among sites with weak latitudinal gradients. Species-specific trends of latitudinal distribution were observed in most of the common intertidal fishes, with over half of the species demonstrating substrate-dependent variation. Species composition was clearly different between the Kyushu Island and the Ryukyus and also between limestone and non-limestone sites. Thus, our results clearly demonstrated that the regional-scale latitudinal trends of tidepool fish assemblages were partially dependent on local environmental characteristics (substrate types). Consideration was given to the influences of the Kuroshio Current and other factors including species interactions that might have helped modify observed latitudinal patterns.