PDF(Pubmed)
Abstract：
Freshwater insects are highly significant as ecosystem service providers, contributing to provisioning services, supporting services, and cultural services. Odonates are dominant predators in many freshwater systems, becoming top predators in fishless ecosystems. One service that odonates provide is the export of matter and energy from aquatic to terrestrial ecosystems. In this study, we provide a review of the literature aiming to estimate the density, biomass, and secondary production of odonates and discuss to what extent this order of insects is relevant for the fertilization of terrestrial ecosystems. We found published data on 109 species belonging to 17 families of odonates from 44 papers. Odonata larvae are abundant in freshwater systems, with a mean density of 240.04 ± 48.01 individuals m-2 (±SE). Lentic habitats show much higher densities (104.40 ± 55.31 individuals m-2, N = 118) than lotic systems (27.12 ± 5.09, N = 70). The biomass estimations for odonates indicate values of 488.56 ± 134.51 mg m-2 y-1, with similar values in lentic and lotic habitats, which correspond to annual secondary productions of 3558.02 ± 2146.80 mg m-2 y-1. The highest biomass is found in dragonflies of the Aeshnidae, Corduliidae, and Gomphidae families. The available evidence suggests a significant potential contribution of Odonata to the exportation of material from water bodies to land. This is further strengthened by the ability of adult odonates to migrate and to colonize different types of water bodies.
摘要：
淡水昆虫作为生态系统服务提供者非常重要，为供应服务做出贡献，支持服务,和文化服务。牙本质是许多淡水系统中的主要捕食者，成为无鱼生态系统中的顶级捕食者。牙牙提供的一项服务是将物质和能量从水生生态系统输出到陆地生态系统。在这项研究中,我们提供了旨在估计密度的文献综述，生物量，和次生的牙列，并讨论这种昆虫的顺序与陆地生态系统的施肥有关的程度。我们从44篇论文中发现了有关17个牙列科的109个物种的公开数据。Odonata幼虫在淡水系统中丰富，平均密度为240.04±48.01个m-2(±SE)。Lentic栖息地的密度（104.40±55.31个m-2，N=118）比lotic系统（27.12±5.09，N=70）高得多。牙齿的生物量估计值为488.56±134.51mgm-2y-1，在literic和lotic生境中具有相似的值，相当于每年的二级产量3558.02±2146.80mgm-2y-1。最高的生物量是在eshnidae的蜻蜓中发现的，Corduliidae,和Gomphidae家族。现有证据表明，Odonata对从水体到土地的物质出口具有重要的潜在贡献。成年牙酸盐迁移和定居不同类型水体的能力进一步增强了这一点。
