COMPARISON OF FIELD METHODS FOR MEASURING SURFACE-TOPOGRAPHY AND THEIR ASSOCIATIONS WITH A TROPICAL REEF FISH ASSEMBLAGE
COMPARISON OF FIELD METHODS FOR MEASURING SURFACE-TOPOGRAPHY AND THEIR ASSOCIATIONS WITH A TROPICAL REEF FISH ASSEMBLAGE
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DOI：
10.3354/meps112087
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发表时间：
1994-09-01
影响因子：
2.5
通讯作者：
MCCORMICK, MI
中科院分区：
文献类型：
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作者：
MCCORMICK, MI
评估了 6 种底层地形或垂直起伏测量与热带鱼群之间的关系，并评估了各种测量的优点。介绍了一种使用轮廓仪在现场量化表面形貌的方法，发现这种方法非常快速，并且可以生成简明的汇总统计数据。在所比较的 6 项底层地形测量中，1 项是新颖的，2 项是地貌技术的衍生，3 项以前曾用于珊瑚礁鱼类研究。测量包括连续基质高度差的总和、矢量标准差（SD）、基质角度SD、基质高度SD、基质高度变异系数（CV）以及轮廓表面距离与线性距离的比率（“链和带”）。除 CV 外，所有表面都存在明显差异，波纹高度和频率各不相同。连续的基质高度差、基质角度 SD 和矢量 SD 最能区分不同地形的 9 个示意剖面。该方法在澳大利亚大堡礁北部蜥蜴岛后礁的 100 个样方（3 x 3 m）上进行了现场测试，对其中的表面地形、鱼类和底栖群落进行了采样。连续高度差方法始终表现良好，与鱼类总丰度、多样性和单个物种丰度的平均相关性最高。在对背礁鱼类组合、底层地形和底栖生物覆盖之间关系的研究中，在描述采样规模的雀鲷丰度模式时，地形的重要性仅次于深度。
The relationships between 6 measures of substratum topography or vertical relief and a tropical fish assemblage were evaluated and the merits of the various measures were assessed. A method of quantifying surface topography in the field using a profile gauge is introduced and found to be rapid and to generate concise summary statistics. Of the 6 measures of substratum topography compared, 1 was novel, 2 were derivations of geomorphological techniques and 3 had been previously used in reef fish studies. Measures included the sum of consecutive substratum height differences, vector standard deviation (SD), substratum angle SD, substratum height SD, substratum height coefficient of variation (CV) and the ratio of contoured surface distance to linear distance ('chain-and-tape'). All but the CV were found to grossly differentiate among surfaces that varied in corrugation height and frequency. Consecutive substratum height difference, substratum angle SD and vector SD were best able to differentiate between 9 schematic profiles of varying topography. A field test of the methods was carried out on 100 quadrats (3 x 3 m) from the backreef of Lizard Island, northern Great Barrier Reef, Australia, in which the surface topography, fish and benthic communities had been sampled. The consecutive height difference method performed consistently well, scoring the highest average correlations with total fish abundance, diversity and the abundance of individual species. In an examination of the relationship between the backreef fish assemblage, substratum topography and the cover of benthic organisms, topography was only secondary in importance to depth in describing the patterns of damselfish abundance at the scale sampled.