Alpha声学指数效应的meta分析

通过声学指数量化声音的特征反映生物的组成和生境信息,是一种高效率、低干扰的监测方式。该研究领域在近十多年来得到了快速的发展,不断有新的声学指数被提出,同时也有大量的实证研究。声学指数可分为反映录音内信息的alpha声学指数和比较不同录音之间差异的beta声学指数,其中alpha声学指数的实证研究较多。本文在汇总已有研究数据的基础上进行meta分析,关注alpha声学指数与动物多样性、生境质量、动物活跃性之间关联的方向和程度。基于文献调研,本文对8个常用的声学指数进行了总结分析:声学复杂度指数(acoustic complexity index,ACI)、声学熵指数(acoustic entropy index,H)、生物声学指数(bioacoustic index,BI)、标准化声景差异指数(normalized difference soundscape index,NDSI)、声学多样性指数(acoustic diversity index,ADI)、声学均匀度指数(acoustic evenness index,AEI)、声学丰富度指数(acoustic richness ind...

A meta-analysis of the effects in alpha acoustic indices

Background: Many animals such as mammals, birds, amphibians, fishes and arthropods, produce sounds when moving, communicating or sensing their environment. Building upon the rich legacies of bioacoustics and animal communication, the acoustic properties from soundscape are used to monitor and assess the changes in animal communities and related environments. During the past decade, many acoustic indices have been developed and can be divided into two categories, namely alpha acoustic indices and beta acoustic indices. Alpha acoustic indices reflect the information in the recording while beta acoustic indices focus on comparison of differences between different recordings. There are far more empirical studies of the application of alpha acoustic indices than beta acoustic indices. However, patterns in alpha acoustic indices have been contradictory. Before alpha indices can be applied widely, it is necessary to understand better how well they reflect the communities and the environments to be monitored.