Diversity partitioning in Phanerozoic benthic marine communities-猫眼课题宝

显生宙底栖海洋群落的多样性划分

DOI：

10.1073/pnas.1814487116

发表时间：

2019

期刊：

Proceedings of the National Academy of Sciences of the United States of America

影响因子：

11.1

通讯作者：

中科院分区：

综合性期刊1区

文献类型：

作者：

Hofmann;Tietje;Aberhan

竞争、捕食和生态位构建等生物相互作用是局部尺度生物多样性的基本驱动力，但它们在地球历史中的长期影响仍然存在争议。为了测试它们的作用和探索生物多样性的潜在限制，我们确定栖息地内（阿尔法），栖息地之间（贝塔），和整体（伽马）多样性的底栖海洋无脊椎动物的古生界地质构造。我们表明，伽马多样性的增加是一致的增加，在整个中生代的α多样性。贝塔多样性只在多样化的早期阶段驱动伽马多样性，但一旦达到一定的伽马水平，贝塔多样性就保持稳定。这种模式在早古生代至中古生代时期普遍存在，而β和γ多样性的耦合变得越来越弱。一般来说，整体生物多样性的增加是通过增加更多的物种到当地的栖息地来实现的，显然这个过程在中生代从未达到饱和。我们的研究结果提供了一般支持的生态模型中，多样化发生在连续阶段的生物相互作用的进展水平。

Biotic interactions such as competition, predation, and niche construction are fundamental drivers of biodiversity at the local scale, yet their long-term effect during earth history remains controversial. To test their role and explore potential limits to biodiversity, we determine within-habitat (alpha), between-habitat (beta), and overall (gamma) diversity of benthic marine invertebrates for Phanerozoic geological formations. We show that an increase in gamma diversity is consistently generated by an increase in alpha diversity throughout the Phanerozoic. Beta diversity drives gamma diversity only at early stages of diversification but remains stationary once a certain gamma level is reached. This mode is prevalent during early- to mid-Paleozoic periods, whereas coupling of beta and gamma diversity becomes increasingly weak toward the recent. Generally, increases in overall biodiversity were accomplished by adding more species to local habitats, and apparently this process never reached saturation during the Phanerozoic. Our results provide general support for an ecological model in which diversification occurs in successive phases of progressing levels of biotic interactions.