A Simple Model to Estimate Growth Rate of Lotic Insect Larvae and Its Value for Estimating Population and Community Production
A Simple Model to Estimate Growth Rate of Lotic Insect Larvae and Its Value for Estimating Population and Community Production
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估算流产昆虫幼虫生长率的简单模型及其对估算种群和群落生产的价值
DOI：
10.2307/1467365
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发表时间：
1994
影响因子：
--
通讯作者：
P. Dumont
中科院分区：
文献类型：
--
作者：
A. Morin;P. Dumont
利用来自于关于水虫生长的文献的数据来开发一个经验模型，该模型预测瞬时生长速率（g，以d-1计）作为个体干质量（W，以mg计）和水温（T，°C）的函数。发现生长速率随尺寸的增加而降低，并随温度的升高而增加，平均Q10为1.78。方程Log 10 g = -2.09-0.27 Log 10 W + 0.025 T解释了田间研究中对数转换生长率的49%观察到的方差。生长速率与体重和温度之间的关系被发现是不同的昆虫订单。平均而言，双翅目的增长速度比一般模型预测的快1.5倍，而毛翅目的增长速度仅为预测速度的0.7倍。体重和温度的系数也各不相同的订单。平均而言，体重影响双翅目和蜉蝣目领域的增长率比毛翅目的速度。生长模型可以与关于单一物种或群落种群生物量大小分布的信息相结合，以估计次级生产。由此获得的估计同意密切（r = 0.93，n = 31）与通过使用标准方法获得的种群的单一物种。对于群落的生产，计算机模拟表明，预测增长率的误差降低了估计的精确度，但建议根据一年的生物量大小分布的每月描述计算的数十个物种的群落的生产估计值平均为真实值的70-140%。因此，在无法估计增长率的情况下，该模型可用于估计具有无法区分的同类的物种或物种组的产量。
Data from the literature on growth of lotic insects were used to develop an empirical model predicting the instantaneous growth rate (g, in d-1) as a function of individual dry mass (W, in mg) and water temperature (T, °C). Growth rates were found to decrease with increasing size, and to increase with an increase in temperature with an average Q10 of 1.78. The equation Log10g = -2.09 - 0.27 Log10 W + 0.025 T explained 49% of the observed variance in logtransformed growth rates from field studies. The relation between growth rate and body mass and temperature was found to vary among insect orders. On average, Diptera grow 1.5× faster than what is predicted by the general model, whereas Trichoptera grow at only 0.7× the predicted rate. The coefficients for body mass and temperature also varied among orders. On average, body mass affects less the field growth rates of Diptera and Ephemeroptera than rates of Trichoptera. The growth models can be combined with information on the biomass size distribution of populations of single species or communities to estimate secondary production. Estimates so obtained agree closely (r = 0.93, n = 31) with those obtained by using standard methods for populations of single species. For production of communities, computer simulations show that errors in predicted growth rates decrease the precision of estimates but suggest that estimates of production of communities of tens of species calculated from monthly description of biomass size distribution for a year would on average be 70-140% of the true value. Thus, the model may be used to estimate production for species or groups of species with indistinguishable cohorts when estimates of growth rates are not available.