INCREASED ENERGY PROMOTES SIZE‐BASED NICHE AVAILABILITY IN MARINE MOLLUSKS
INCREASED ENERGY PROMOTES SIZE‐BASED NICHE AVAILABILITY IN MARINE MOLLUSKS
复制标题
能量的增加促进了海洋软体动物基于体型的生态位可用性
DOI：
10.1111/j.1558-5646.2012.01580.x
复制
发表时间：
2012
期刊：
影响因子：
3.3
通讯作者：
P. Unmack
中科院分区：
文献类型：
--
作者：
C. McClain;Taylor Gullett;Justine Jackson;P. Unmack
化学能的变化，即食物的可得性，被认为会导致体型的变化。然而，对这种关系的研究很少，而且主要局限于羊膜动物和浮游动物。此外，体型与化学能之间的关系可能受到系统发育历史、进化支系特定生态以及化学能在时空上的异质性的影响。在记录食物可得性随梯度变化的体型模式和理解可能产生体型变化的过程方面，仍有大量工作要做。在这里，我们研究了各种各样的海洋软体动物在栖息地和流动性方面的体型和化学能可用性之间的功能关系。我们证明，化学能量的可用性可能会影响不同栖息地的体型模式。我们发现，食物可得性降低降低了基于尺寸的生态位可得性，这是通过对最大尺寸和潜在的最小尺寸设置硬性限制来实现的，具体取决于进化支特定的生态学。相反，更高的食物供应促进了更大的生态位供应，并潜在地促进了关于大小的进化创新。基于这些发现和以前的工作，我们假设化学能的增加对后生动物通过大小介导的生态位过程的多样化很重要。
Variation in chemical energy, that is food availability, is posited to cause variation in body size. However, examinations of the relationship are rare and primarily limited to amniotes and zooplankton. Moreover, the relationship between body size and chemical energy may be impacted by phylogenetic history, clade‐specific ecology, and heterogeneity of chemical energy in space and time. Considerable work remains to both document patterns in body size over gradients in food availability and understanding the processes potentially generating them. Here, we examine the functional relationship between body size and chemical energy availability over a broad assortment of marine mollusks varying in habitat and mobility. We demonstrate that chemical energy availability is likely driving body size patterns across habitats. We find that lower food availability decreases size‐based niche availability by setting hard constraints on maximum size and potentially on minimum size depending on clade‐specific ecology. Conversely, higher food availability promotes greater niche availability and potentially promotes evolutionary innovation with regard to size. We posit based on these findings and previous work that increases in chemical energy are important to the diversification of Metazoans through size‐mediated niche processes.