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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Palatability and chemical defences of benthic cyanobacteria to a suite of herbivores
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Palatability and chemical defences of benthic cyanobacteria to a suite of herbivores

机译：底栖蓝细菌对一组食草动物的适口性和化学防御作用

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摘要

Nuisance blooms of toxic cyanobacteria are a common occurrence in many tropical and subtropical locations. Benthic marine cyanobacteria of the genera Lyngbya, Okeania, and Moorea are frequently observed in both Florida and throughout the Caribbean, sometimes forming large mats, and are prolific producers of bioactive secondary metabolites that often act as feeding deterrents to generalist herbivores. Little is known regarding the ecological roles of the secondary metabolite chemistry and the palatability of benthic cyanobacteria to grazers. This study examines the palatability of benthic cyanobacterial species from Florida (IRL1, IRL2, IRL3 and Okeania erythroflocculosa) and Belize (BEL1 BEL2) to a range of macro- and mesograzers in Florida and Belize. Pair-wise feeding assays using artificial diets of Gracilaria tikvahiae or fish food coated with cyanobacterial extracts and a control were used to determine palatability of extracts to Floridian and Belizean generalist grazers. The extracts of IRL1, IRL2, IRL3 and O. erythroflocculosa from Florida did not deter feeding by invertebrate grazers. Reef fish, however, were deterred by the non-polar extracts of IRL1, IRL3 and O. etythroflocculosa. Stylocheilus striatus was stimulated to feed on IRL2 extracts and non-polar extracts from IRL3. Non-polar extracts of BEL1 stimulated feeding in S. striatus; however, no significant difference was observed between BEL2 extracts and the control. Most generalist invertebrate grazers, sympatric and non-sympatric, appear indifferent to cyanobacteria extracts whilst reef fish are more likely to be deterred by cyanobacterial extracts, which may affect species interaction within communities with fluctuating or dominating benthic cyanobacterial blooms. (C) 2015 Elsevier B.V. All rights reserved.
机译：在许多热带和亚热带地区，常见的有毒蓝藻滋扰性花朵很常见。 Lyngbya，Okeania和Moorea属的底栖海洋蓝细菌经常在佛罗里达州和整个加勒比海地区观察到，有时会形成大垫子，并且是生物活性次生代谢产物的多产生产者，通常充当通向食草动物的威慑作用。关于次生代谢产物化学的生态作用和底栖蓝细菌对放牧者的适口性知之甚少。这项研究检查了佛罗里达（IRL1，IRL2，IRL3和Okeania erythroflocculosa）和伯利兹（BEL1 BEL2）的底栖蓝细菌种类对佛罗里达和伯利兹的一系列大型和中型食草动物的适口性。配对饲喂测定法是使用人工生长的拟南芥或带蓝藻提取物包被的鱼类食品和对照的日粮来确定提取物对佛罗里达和伯利兹通才放牧者的适口性。来自佛罗里达州的IRL1，IRL2，IRL3和O. erythroflocculosa的提取物并没有阻止无脊椎动物吃草者的进食。但是，礁鱼被IRL1，IRL3和O. etythroflocculosa的非极性提取物所阻止。刺激Stylocheilus striatus以IRL2提取物和IRL3的非极性提取物为食。 BEL1的非极性提取物刺激了条纹状链球菌的觅食；但是，BEL2提取物与对照之间未观察到显着差异。大多数无脊椎动物的同食和非同食无脊椎动物都对蓝藻提取物无动于衷，而珊瑚鱼则更有可能被蓝藻提取物阻止，这可能会影响底栖蓝藻花开或起伏的群落之间的物种相互作用。 （C）2015 Elsevier B.V.保留所有权利。

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