Comparative metabolic ecology of tropical herbivorous echinoids on a coral reef.
Comparative metabolic ecology of tropical herbivorous echinoids on a coral reef.
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珊瑚礁上热带草食类螺旋体的比较代谢生态学。
DOI：
10.1371/journal.pone.0190470
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Eynaud Y
中科院分区：
文献类型：
--
作者：
Lewis LS;Smith JE;Eynaud Y
消费者的新陈代谢率是生态系统动态的关键驱动力。在珊瑚礁上，食草性棘虫消耗肉质藻类，促进了造礁钙化生物的生长;然而，人们对物种之间在代谢和功能生态学方面的差异知之甚少。在这里，我们使用对数-线性（对数-对数）回归模型来研究夏威夷珊瑚礁上五种常见食草棘虫的质量和常规代谢率的异速生长标度：Echinothrix calamaris，E。迪亚德马、马氏棘宫虫、乳头异心虫和三角丽虫。尺度关系进行了对比，海胆生态学和一般代谢理论的经验观察，以扩大我们的了解热带食草海胆的代谢和功能生态学的多样性。试验直径和种类解释了98%的质量变异，质量和种类分别解释了个体（I）和质量特异性（B）代谢率变异的92.4%和87.5%。标度指数没有不同的质量或代谢，但是，归一化常数不同物种之间显着。质量随测试直径的立方（B = 2.9）而变化，HM表现出比其他物种显著更高的归一化常数，可能是由于其严重钙化的棘和骨骼。个体代谢率的变化近似为质量的2/5次方（γ = 0.44）;显著小于3/4通用换算系数，但包括2/3换算系数。E. calamaris和H.乳头虫表现出最低的归一化常数，这与它们缓慢移动、隐蔽、钻岩的生活史相对应。与之相反，E. calamaris、刺蛾E.迪亚德马和T. gratilla表现出更高的代谢率，可能反映了它们更高的活动水平和由于化学抗捕食者防御而自由浏览优选藻类的能力。因此，代谢比例的差异似乎与生殖、行为和生态功能的差异相对应。这种比较代谢评估是为理论、生态模型和生态系统的有效管理提供信息的核心。
The metabolic rate of consumers is a key driver of ecosystem dynamics. On coral reefs, herbivorous echinoids consume fleshy algae, facilitating the growth of reef-building calcified organisms; however, little is known about differences among species in their metabolic and functional ecology. Here, we used log-linear (log-log) regression models to examine the allometric scaling of mass and routine metabolic rate for five common herbivorous echinoids on a Hawaiian coral reef: Echinothrix calamaris, E. diadema, Echinometra matthaei, Heterocentrotus mammillatus, and Tripneustes gratilla. Scaling relationships were then contrasted with empirical observations of echinoid ecology and general metabolic theory to broaden our understanding of diversity in the metabolic and functional ecology of tropical herbivorous echinoids. Test diameter and species explained 98% of the variation in mass, and mass and species explained 92.4% and 87.5% of the variation in individual (I) and mass-specific (B) metabolic rates, respectively. Scaling exponents did not differ for mass or metabolism; however, normalizing constants differed significantly among species. Mass varied as the cube of test diameter (b = 2.9), with HM exhibiting a significantly higher normalizing constant than other species, likely due to its heavily-calcified spines and skeleton. Individual metabolic rate varied approximately as the 2/5 power of mass (γ = 0.44); significantly smaller than the 3/4 universal scaling coefficient, but inclusive of 2/3 scaling. E. calamaris and H. mammillatus exhibited the lowest normalizing constants, corresponding with their slow-moving, cryptic, rock-boring life-history. In contrast, E. calamaris, E. diadema, and T. gratilla, exhibited higher metabolic rates, likely reflecting their higher levels of activity and ability to freely browse for preferred algae due to chemical anti-predator defenses. Thus, differences in metabolic scaling appeared to correspond with differences in phylogeny, behavior, and ecological function. Such comparative metabolic assessments are central to informing theory, ecological models, and the effective management of ecosystems.
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影响因子：
2.8
作者：
Carey, Nicholas;Harianto, Januar;Byrne, Maria
通讯作者：
Byrne, Maria
DOI：
10.1016/0300-9629(82)90092-5
发表时间：
1982-01-01
影响因子：
2.3
作者：
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通讯作者：
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DOI：
10.1073/pnas.1208909109
发表时间：
2012-10-30
影响因子：
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Puotinen, Marji
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影响因子：
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作者：
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