The theory of secondary production calculations for continuously reproducing populations
The theory of secondary production calculations for continuously reproducing populations
复制标题
连续繁殖种群的二次生产计算理论
DOI：
--
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
W. Kimmerer
中科院分区：
文献类型：
--
作者：
W. Kimmerer
目前用于计算二次生产的定义和数学表达式是基于对群体发育的观察。大多数海洋浮游动物种群和许多底栖种群不满足测量群体生长和死亡率所需的严格条件，并且将群体方法中使用的数学应用于此类群体可能会导致错误。更好的方法是假设近似稳定状态，并根据瞬时生产率 PR 的观察来确定一段时间内的综合产量 (IP)。 IP 的测定包括两个步骤：PR 测量（通常采用直接方法）和积分。在给定时间间隔内根据 PR 确定的 IP 值取决于对样本之间 PR 轨迹的假设。我使用几个简单的模型来证明不需要测量死亡率，并且可以根据 PR 样本数据确定 IP。 IP 的最佳估计是 PR 值乘以适当的时间间隔的简单总和。
Definitions and mathematical expressions currently used to calculate secondary production are based on the observation of development in cohorts. Most populations of marine zooplankton and many benthic populations do not meet the strict conditions necessary for measurement of growth and mortality in cohorts, and application of the mathematics used in cohort methods to such populations can lead to errors. A better approach is to assume approximate steady state and to determine integrated production (IP) over a time period from observations of the instantaneous production rate, PR. The determination of IP consists of two steps: measurement of PR, usually by a direct method, and integration. The value of IP determined from PR over a given time interval depends on assumptions about the trajectory ofPR between samples. I use several simple models to demonstrate that mortality need not be measured and that IP can be determined from sample data on PR. The best estimate of IP is a simple sum of PR values multiplied by appropriate time intervals.