Spatial patterns of epilithic algal and detrital resources on a windward coral reef
Spatial patterns of epilithic algal and detrital resources on a windward coral reef
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迎风珊瑚礁上石生藻类和碎屑资源的空间格局
DOI：
10.1007/s003380100150
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发表时间：
2001
期刊：
影响因子：
3.5
通讯作者：
D. Bellwood
中科院分区：
文献类型：
--
作者：
S. Purcell;D. Bellwood
藻类和碎屑共同出现在珊瑚礁底层，但它们对消费者的相对重要性，在生物量和营养成分方面，知之甚少。利用真空取样器对澳大利亚吕宋岛四个迎风带的石生藻类、沉积物和碎屑进行了取样。藻类和碎屑的总N，P和生物量（总有机C）进行了定量。藻类和碎屑生物量各带之间的变化，都与泥沙负荷呈正相关。藻类生物量约为礁顶碎屑的6倍。在其他区域，这两种成分的丰度更为相似。珊瑚礁顶部的颗粒物具有最高的有机：无机比例，这一特征可能受到草食性和食草性鱼类的青睐。藻类和碎屑的C：N比，而当地变量，大致相当的区域之间。在背风区，两种成分的C：P比值均降低。虽然局部变量，碎屑有较高的含量的N和P.总体而言，碎屑是相对丰富的迎风礁基质和相等或更大的营养质量比藻类。它代表了一个潜在的重要资源，无论是食草鱼类和食草鱼类。
Algae and detritus co-occur on reef substrata, but their relative importance to consumers, in terms of biomass and nutrient content, is poorly understood. Epilithic algae, sediment and detritus were sampled among four windward zones at Lizard Island, Australia, using a vacuum sampler. Total N, P and biomass (total organic C) were quantified for algae and detritus. Algal and detrital biomass varied among zones and both were positively correlated with sediment load. Algal biomass was approximately six times higher than detritus on the reef crest. In other zones, the two components were more similar in abundance. Particulates on the reef crest had the highest organic:inorganic ratios, a feature likely to be favoured by herbivorous and detritivorous fishes. C:N ratios of algae and detritus, while locally variable, were broadly comparable among zones. C:P ratios of both components decreased in leeward zones. Although locally variable, detritus had a higher content of both N and P. Overall, detritus is relatively abundant on windward reef substrata and of equal or greater nutritional quality than algae. It represents a potentially important resource for both detritivorous and herbivorous fishes.