Individual soil mite data

Indiv is a data frame stored in "Individual soil mite data.Rdata" which contains the following columns relevant to the sampling experiment. *trt* has levels that represent the food treatment: T1 (constant), T2 (famine), T3 (declining), T4 (fluctuating) *pop.ID* is a unique identifier for each of 2 replicate populations per treatment. *date* is the date when a sampling event began *stage* is the life stage of the individual at the beginning of the 24 hour sampling period. *ind.ID* is a unique identifier of an individual observed for a sampling period. *s24* is 1 if the individual was alive after 24 hours, 0 if it was dead, or NA if it was lost. *t24* indicates transiton to either the same stage as the beginning of the sampling period (initial stage) the next, or in between stages (quiescent). *f24* is the number of eggs laid in the 24 hour sampling period. *l0* is the body length at the beginning of the sampling period (mm). *l24* is the body length at the end of the sampling period (mm). *density* is the approximate value of body lenghths summed over the population on the date of sampling (see apendix S2 from publication) (mm). *supply* is food given divided by density on the date of sampling (mg/mm). *food* is the amount of food given to the population on that date (mg). *density.s* is the density scaled to have mean 0 and variance 1. *supply.s* is the supply scaled to have mean 0 and variance 1. *l0.s* is body length scaled to have mean 0 and variance 1. *day* is the number of days since the start of the experiment.Indiv为存储于"Individual soil mite data.Rdata"中的数据框，包含与采样实验相关的如下列字段： *trt*：代表食物处理的分组水平，包含T1（恒定组）、T2（饥饿组）、T3（递减组）、T4（波动组） *pop.ID*：为每个处理下2个重复种群的唯一标识符 *date*：采样事件开始的日期 *stage*：24小时采样周期起始时该个体的生活史阶段 *ind.ID*：单个个体在单次采样周期内的唯一标识符 *s24*：若个体在24小时后仍存活则记为1，死亡则记为0，丢失则记为缺失值（NA） *t24*：指示个体在采样周期内的状态转变：维持采样初始阶段、发育至下一阶段，或处于阶段间的静止状态（quiescent） *f24*：24小时采样周期内该个体的产卵量 *l0*：采样周期开始时的个体体长（单位：毫米） *l24*：采样周期结束时的个体体长（单位：毫米） *density*：采样当日种群内所有个体体长总和的近似值（详见发表文献附录S2），单位：毫米 *supply*：采样当日食物供给量与种群密度的比值，单位：毫克/毫米 *food*：当日向实验种群提供的食物总量（单位：毫克） *density.s*：经标准化处理后的密度（均值为0，方差为1） *supply.s*：经标准化处理后的食物供给量（均值为0，方差为1） *l0.s*：经标准化处理后的初始体长（均值为0，方差为1） *day*：自实验启动以来的累计天数