SPATIAL-TEMPORAL DISTRIBUTION OF AQUATIC INSECTS IN STREAMS OF THE AMAZON LOWLANDS, LORETO, PERU
DOI:
https://doi.org/10.24841/fa.v30i2.565Keywords:
distribution, aquatic insects, streams, Amazon lowlandsAbstract
This study aimed to determine the spatial and temporal distribution of aquatic insects in 10 streams of the Amazon lowlands located within the area of influence of the Iquitos-Nauta highway (Loreto, Peru). Samplings were made in two zones with different access roads, anthropic influence and stream sizes, which were named: ZM 1 and ZM 2; and, during three distinct hydrological periods: draining season, dry season and rising season. Richness, abundance, diversity, and dominance of aquatic insects; as well as water pH, temperature (ºC), dissolved oxygen (mg/l) and electrical conductivity (μS/cm) levels of each stream were recorded. Results report a total richness of 63 families and 4771 individuals; of which the families Leptophlebiidae, Caenidae, Libellulidae, Hidrophilidae, Elmidae, Hydropsychidae, Polycentropodidae, Tipulidae, Ceratopogonidae and Chironomidae, are widely distributed in the evaluated streams. Significant differences were recorded between the two sampling areas (p=0.01) and among the three collection periods evaluated (p=0.035); reporting higher records of richness, abundance and diversity; as well as higher values of pH, temperature, dissolved oxygen and electrical conductivity in the streams of the ZM 2 and during the dry season. The highest level of dominance occurred in the streams of ZM 1, during the draining and rising water seasons, being Chironomidae, the dominant family. Our results provide baseline information for the optimization of methods for evaluating the environmental quality of streams in the Peruvian Amazon lowlands.
Downloads
Downloads
Published
Issue
Section
License
Authors who have publications with this journal agree to the following terms:
a. Authors will retain their copyright and grant the journal the right of first publication of their work, which will simultaneously be subject to the Creative Commons Attribution License that allows third parties to share the work as long as its author and first publication in this journal are indicated.
b. Authors may adopt other non-exclusive license agreements for distribution of the published version of the work (e.g., depositing it in an institutional repository or publishing it in a monographic volume) as long as the initial publication in this journal is indicated.
c. Authors are allowed and encouraged to disseminate their work through the Internet (e.g., in institutional repositories or on their website) before and during the submission process, which may lead to interesting exchanges and increase citations of the published work. (See The Open Access Effect).
