Odonata in rice agroecosystems: Testing good practices for their conservation
Odonata in rice agroecosystems: Testing good practices for their conservation
复制标题
水稻农业生态系统中的蜻蜓目：测试其保护的良好做法
DOI：
10.1016/j.agee.2019.01.009
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
G. Bogliani
中科院分区：
文献类型：
--
作者：
D. Giuliano;G. Bogliani
由于水稻种植集约化，稻田系统最近失去了其作为几种湿地物种替代栖息地的原始价值。水制度的变化在很大程度上损害了许多以前在稻田中丰富的水生生物的生存，例如Odonata，导致引入新的农业做法，本应减轻集约化水稻种植对生物多样性的负面影响。例如，意大利鼓励在稻田内建造保水结构（沟渠），以减少干燥期对水生生物的有害影响。本研究探讨了稻田稻蠹蛾的种类和分布对稻蠹蛾多样性的影响，并评价了稻蠹蛾对稻田和水渠两岸植被高度的响应，以近似于草地管理强度。野外调查结果显示，不交配可能不足以改善稻田作为大腹蛇繁殖栖息地的适宜性，特别是对敏感物种。沟渠尺寸较大的稻田比其他类型的稻田支持更多的成虫种群，但幼虫阶段没有明显差异。相反，在稻田中，发育良好的河岸植被对这些昆虫有明显的好处，而在灌溉渠沿岸则没有明显的影响。为了在水稻农业生态系统中实现Odonata保护，应鼓励在稻田中挖掘大型沟渠，建立半自然湿地网络，并在稻田和运河岸边实施广泛的草地管理战略。
Paddy systems have recently lost their original value as surrogate habitat for several wetland species due to rice farming intensification. Changes in water regimes largely compromised the survival of many aquatic organisms formerly abundant in rice fields, such as Odonata, inducing the introduction of new agricultural practices supposed to mitigate the negative impacts of intensive rice cultivation on biodiversity. For instance, the construction of a water retention structure (ditch) within paddies has been incentivized in Italy, in order to reduce the detrimental effects of drying periods on aquatic organisms. In this research, we investigate the effects ofditchoccurrence and dimensions on Odonata diversity in rice fields, and furthermore we evaluate the response of these insects to vegetation height on paddy and canal banks, as an approximation of grass management intensity. Field surveys revealed thatditchoccurrence may not be sufficient to improve the suitability of rice fields as breeding habitat for Odonata, especially for sensitive species. Paddies withditchesof larger dimensions supported more abundant adult populations than other field types, but no clear differences have been observed concerning larval stages. Conversely, the occurrence of a well-developed bank vegetation produced clear benefits for these insects in rice fields, while a not significant effect have been observed along irrigation canals. In order to achieve Odonata conservation in rice agroecosystems, together with the excavation of largeditcheswithin paddies, the creation of a network of semi-natural wetlands should be encouraged, as well as the implementation of extensive grass management strategies on rice field and canal banks.