Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1712629115 |
Energetic tradeoffs control the size distribution of aquatic mammals | |
Gearty, William1; McClain, Craig R.2; Payne, Jonathan L.1 | |
2018-04-17 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:16页码:4194-4199 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Four extant lineages of mammals have invaded and diversified in the water: Sirenia, Cetacea, Pinnipedia, and Lutrinae. Most of these aquatic clades are larger bodied, on average, than their closest land-dwelling relatives, but the extent to which potential ecological, biomechanical, and physiological controls contributed to this pattern remains untested quantitatively. Here, we use previously published data on the body masses of 3,859 living and 2,999 fossil mammal species to examine the evolutionary trajectories of body size in aquatic mammals through both comparative phylogenetic analysis and examination of the fossil record. Both methods indicate that the evolution of an aquatic lifestyle is driving three of the four extant aquatic mammal clades toward a size attractor at similar to 500 kg. The existence of this body size attractor and the relatively rapid selection toward, and limited deviation from, this attractor rule out most hypothesized drivers of size increase. These three independent body size increases and a shared aquatic optimum size are consistent with control by differences in the scaling of energetic intake and cost functions with body size between the terrestrial and aquatic realms. Under this energetic model, thermoregulatory costs constrain minimum size, whereas limitations on feeding efficiency constrain maximum size. The optimum size occurs at an intermediate value where thermoregulatory costs are low but feeding efficiency remains high. Rather than being released from size pressures, water-dwelling mammals are driven and confined to larger body sizes by the strict energetic demands of the aquatic medium. |
英文关键词 | body mass Ornstein-Uhlenbeck metabolism phylogenetic comparative methods Mammalia |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430191900070 |
WOS关键词 | BENTHIC MARINE-INVERTEBRATES ; BODY-SIZE ; COPES RULE ; STABILIZING SELECTION ; TERRESTRIAL MAMMALS ; ADAPTIVE EVOLUTION ; EXTINCTION RISK ; BLUE WHALE ; MASS ; SPACE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204901 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA; 2.Louisiana Univ Marine Consortium, Chauvin, LA 70344 USA |
推荐引用方式 GB/T 7714 | Gearty, William,McClain, Craig R.,Payne, Jonathan L.. Energetic tradeoffs control the size distribution of aquatic mammals[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(16):4194-4199. |
APA | Gearty, William,McClain, Craig R.,&Payne, Jonathan L..(2018).Energetic tradeoffs control the size distribution of aquatic mammals.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(16),4194-4199. |
MLA | Gearty, William,et al."Energetic tradeoffs control the size distribution of aquatic mammals".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.16(2018):4194-4199. |
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