Amphibians are the extant descendants of the first vertebrate class to successfully colonize terrestrial environments; hence they occupy a unique position between fish and reptiles. Amphibian skin provides essentially no resistance to evaporative water loss, and consequently daily water turnover rates are an order of magnitude greater than in other terrestrial vertebrate groups. This has led to a suite of physiological, morphological and behavioural adaptations that have allowed a successful terrestrial existence in spite of this apparently spendthrift water retention strategy. Ecological and Environmental Physiology of Amphibians provides a synthesis of current research on the comparative physiology of amphibians with a particular emphasis on water balance. It adopts a strong environmental perspective and includes a wealth of information on ecology, phylogeny and development. As with other books in the Ecological and Environmental Physiology Series, the emphasis in this book is on the unique physiological characteristics of the amphibians, although the latest experimental techniques and future research directions are also considered.This accessible text is suitable for both graduate students and researchers in the fields of amphibian comparative physiology and physiological ecology, including specialist courses in amphibian ecology. It will also be of value and use to the many professional herpetologists requiring a concise overview of the topic.
Stan Hillman is Professor and Chair of Biology at Portland State University. He obtained is Ph.D. in 1977 from the University of California, Los Angeles. He is the author of many papers on aspects of the osmotic, metabolic and cardiovascular physiology of amphibians from three continents.
Philip Withers is Professor of Zoology at the University of Western Australia. He obtained his Ph.D. in 1976 from the University of California, Los Angeles. He is the author of over 200 publications on the physiology and ecology of vertebrates, and has extensive research experience with metabolic, osmotic and cardiovascular physiology of amphibians from four continents. He is the author of textbooks on Comparative Animal Physiology.
Robert Drewes is Curator of Herpetology at the California Academy of Sciences. He obtained his Ph.D. in 1981 from the University of California, Los Angeles. He is the author of over 70 papers and two books on aspects of amphibian taxonomy, distributions and environmental physiology from species spanning there continents. He brings the taxonomic expertise so important in phylogenetic analyses of variation as well as an incredible field experience of the African amphibian fauna; he curates one of the largest museum collections of African amphibians and reptiles in the world.
Stan Hillyard is Professor of Biology at the University of Nevada, Los Vegas. He obtained his Ph.D. in 1974 from the University of California, Riverside. He is the author of over 50 papers on aspects of the control of cutaneous water and ion absorption in amphibian skin. He has a unique background in the utilization of amphibians as model systems for general physiology, with a strong appreciation for grounding in environmental relevance. He also has extensive experience with researchers and the amphibian fauna of Europe.
这本书的价值不仅在于罗列事实,更在于它构建了一个理解两栖动物生命周期的全新框架。我尤其关注其中关于“毒性与免疫系统的协同进化”的讨论。两栖动物皮肤中丰富的次级代谢产物,传统上多被视为防御性化学武器,但作者提出了一个更具前瞻性的观点:这些化合物可能在调节自身的肠道微生物群落,甚至在辅助免疫应答中扮演了关键角色。这种跨学科的视角,将药理学、免疫学与生态压力融为一炉,极大地拓宽了我的思路。书中对环境污染物,尤其是内分泌干扰物对两栖动物生殖轴影响的评估,也做得极其到位。作者没有采用耸人听闻的论调,而是冷静地分析了剂量-响应曲线、遗传多态性对个体敏感度的影响,并严谨地评估了这些生理干扰在种群动态中的长期后果。这使得全书的论述既有科学的严谨,又不失对现实保护问题的深刻关怀。
评分坦白说,这本书的图表设计是其一大亮点,它们远非填充版面的配图,而是叙事的核心组成部分。特别是关于两栖动物的体液平衡动态模型部分,作者使用了一种非常巧妙的、多变量的图示方法来展示在不同盐度环境下,肾脏、膀胱和皮肤共同作用下的水盐交换平衡点。我曾花费了近一个小时来仔细研读其中一个关于幼体变态过程中代谢重组的流程图,它清晰地描绘了甲状腺激素如何“重写”蛋白质表达,使得对氧气和营养物质的利用模式发生彻底转变。这种对复杂生物过程的视觉化处理能力,大大降低了理解的门槛,同时也为研究人员提供了极佳的参考模型。这本书的排版也十分考究,字体选择和行距安排都非常适合长时间的阅读和笔记摘录,体现出出版方对严肃学术读物的尊重。
评分阅读体验上,这本书的学术深度和可读性达到了一个极高的平衡点。它显然是为有一定生物学基础的读者准备的,但叙述的流畅性却完全没有牺牲专业性。书中对于热力学在两栖动物行为选择中的作用进行了令人耳目一新的阐释。以往我对冷血动物的理解多停留在“它们依赖外部热源”,但这本书更进一步探讨了“行为性热调节”的优化策略——比如不同种类的变色能力如何影响吸收太阳辐射的效率,以及这种选择性采暖如何影响其肌肉的收缩速度和捕食的成功率。作者引入了大量的案例研究,从亚马逊雨林的树蛙到寒冷山区的蝾螈,对比了它们在温度变化下的生理响应阈值。其中关于休眠(Brumation)生理机制的章节尤为精彩,它不仅仅描述了代谢率的下降,更深入探讨了细胞层面抗冻蛋白的表达机制,以及在代谢停滞期间,器官如何维持其结构完整性。这部分内容逻辑清晰,论据扎实,读起来就像在拆解一个精密的生物钟,每一步的转动都精确无误,让人对生命的适应性有了更深一层的敬畏。
评分这本关于两栖动物生态生理学的著作,在我桌上已经躺了好一阵子,每一次翻开它,都像是进行一次深入的、迷人的自然探索。首先吸引我的是其对环境胁迫如何塑造两栖动物生理机制的详尽论述。书中并没有停留在基础的生理学名词解释上,而是着重于将生命体的内部运作与它们所栖息的湿地、森林乃至高海拔环境的实际条件紧密联系起来。比如,关于皮肤呼吸在不同湿度梯度下的效率变化,作者不仅给出了详实的实验数据,还用非常直观的图表展示了水汽压亏缺如何直接影响到血液中的气体交换速率,以及这在繁殖季的能量预算中占据了多大的比重。我特别欣赏它对“生态学限制”这一概念的深入挖掘——它不是简单地说两栖动物对干燥敏感,而是细致剖析了渗透调节系统、尿酸代谢路径如何被进化塑造成应对长期干旱风险的“生物保险”。这种将宏观生态挑战转化为微观分子响应的叙事方式,使得即便是复杂的生物化学过程也变得生动可感,让人不禁对这些小小的生命体在地球上顽强生存的智慧肃然起敬。那种细致入微的观察,仿佛带领我亲自站在一片雾气弥漫的沼泽边,感受着清晨的寒意和青蛙皮肤上那层薄薄粘液的生命力。
评分这本书的最终影响力,在于它成功地将“两栖动物”这一看似单一的类群,解构成了无数个依赖于特定环境参数的生理策略集合。我个人对其中关于两栖动物对紫外线辐射(UVB)的适应机制感到非常新奇。以往的认知多集中在物种如何避开强光,但书中揭示了某些物种如何利用皮肤色素沉积,甚至调节体内特定的酶活性来应对UVB带来的DNA损伤,而这种调节机制又反过来受到其栖息地水体透明度和荫蔽度的制约。这种对复杂反馈回路的深入剖析,使得读者在看待任何一个生理特征时,都会习惯性地去追问:“这个特征在何种环境压力下被优化到现在的状态?”它培养了一种生态生理学的思维方式,即任何生物学特征都必然是环境选择的妥协与胜利的产物。总而言之,这是一部具有里程碑意义的著作,它不仅是知识的宝库,更是一套观察自然运作的全新透镜。
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