Sousa Kenned Silva, Brito Joás Silva, Cruz Gabriel Martins, Bastos Rafael Costa, Mendoza-Penagos Cristian Camilo, Silva Everton, Montag Luciano, Oliveira-Junior José Max Barbosa, Brejão Gabriel, Casatti Lilian, Michelan Thaísa Sala, Juen Leandro, Dias-Silva Karina
Programa de Pós-Graduação em Ecologia, Belém, Pará, Brazil.
Instituto de Ciências e Tecnologia das Águas (ICTA), Univ Federal do Oeste Do Pará, Santarém, Pará, Brazil.
Neotrop Entomol. 2025 Mar 26;54(1):51. doi: 10.1007/s13744-025-01265-7.
The establishment of conservation units (CUs) aims to preserve biodiversity, yet these areas are under great anthropogenic pressure, particularly from logging, mining, and cattle ranching. Considering this context, our study assesses the importance of the protected area (National Park) and habitat integrity using the Habitat Integrity Index (HII) for conserving Odonata assemblages. Our hypothesis is that (1) the sites within the national park would have higher HII scores and greater Zygoptera diversity metrics (species diversity, abundance, proportions, and composition) compared to the scores of the sites outside the park; and (2) considering the habitat integrity of the streams, Anisoptera and Zygoptera serve as indicators, with the former associated with lower scores and the latter with higher scores. We sampled 25 streams (both within and outside) of the Jamanxim National Park, identifying 43 species of Odonata, including 16 Anisoptera and 27 Zygoptera. Streams outside the national park harbored the highest number of exclusive Anisoptera and Zygoptera species. Linear models revealed a significant negative correlation between habitat integrity and Anisoptera abundance only. Moreover, significant differences in Anisoptera abundance were observed between streams within and outside the national park, along with distinct heterogeneity in Anisoptera species composition. The decrease in Anisoptera abundance with increasing habitat integrity may be attributed to their preference for open areas for thermoregulation. Conversely, the positive response of Zygoptera species to habitat integrity underscores their reliance on more conserved environments, enhancing our understanding of their ecological requirements. These results reinforce the importance and efficiency of Odonata as a bioindicators of environmental quality and integrating the order into aquatic monitoring programs alongside the HII, provides a straightforward and objective measure of environmental disturbance.
建立保护单元（CUs）旨在保护生物多样性，但这些区域面临着巨大的人为压力，尤其是来自伐木、采矿和养牛业的压力。考虑到这种情况，我们的研究使用栖息地完整性指数（HII）评估保护区（国家公园）和栖息地完整性对于保护蜻蜓目群落的重要性。我们的假设是：（1）与公园外的地点相比，国家公园内的地点将具有更高的HII分数和更大的均翅亚目多样性指标（物种多样性、丰度、比例和组成）；（2）考虑到溪流的栖息地完整性，差翅亚目和均翅亚目可作为指标，前者与较低分数相关，后者与较高分数相关。我们对雅曼西姆国家公园内（外）的25条溪流进行了采样，鉴定出43种蜻蜓目昆虫，包括16种差翅亚目和27种均翅亚目。国家公园外的溪流拥有最多的差翅亚目和均翅亚目特有物种。线性模型显示，仅栖息地完整性与差翅亚目丰度之间存在显著的负相关。此外，国家公园内外的溪流之间在差翅亚目丰度上存在显著差异，差翅亚目物种组成也存在明显的异质性。差翅亚目丰度随栖息地完整性增加而下降可能归因于它们偏好开阔区域进行体温调节。相反，均翅亚目物种对栖息地完整性的积极反应突出了它们对更保守环境的依赖，增进了我们对其生态需求的理解。这些结果强化了蜻蜓目作为环境质量生物指标的重要性和有效性，将该目纳入水生监测计划并结合HII，提供了一种直接且客观的环境干扰衡量标准。
