See productivity.
In ecology, the amount of energy which primary producers can pass on to the second trophic level; see Zhao et al. (2012) PLoS ONE 7, 11 DOI:10.1371/journal.pone.0048131.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。