Laboratório de Ictiologia de Altamira - LIA, Universidade Federal do Pará (UFPA), Campus Altamira. Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, CEP 68372-040, Brazil.
Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira. Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, CEP 68372-040, Brazil.
Sci Rep. 2020 Feb 7;10(1):2174. doi: 10.1038/s41598-020-59207-9.
Riparian vegetation plays an important role in providing energy to small watercourses and maintaining ecological processes through organic matter input and together with hydrological and geomorphological watercourse characteristics influence on fish assemblages. The goal of this paper was partitioning and quantifying the influence of riparian zone (type of riverbank substrate, bank slope, type of riparian vegetation cover and percentage of riparian vegetation cover on the main channel), physical habitat (stream channel width and depth, type of substrate and aquatic habitat in channel, water velocity and organic matter), water quality (turbidity, temperature, conductivity, pH, dissolved oxygen and chlorophyll concentration) and spatial variables (linear distances between sampled points) on fish assemblages (richness and abundance per species) in headwater streams of the Upper Paraná River basin, Central Brazil. For this purpose, it was performed a variation partitioning analysis between riparian, physical habitat, water and spatial variables sets and a Redundancy Analysis to quantify the influence of variables on the fish assemblages. Only the physical habitat and water quality variables influenced the fish assemblages (richness and abundance per species).
河岸植被通过有机物质的输入为小溪提供能量，对维持生态过程起着重要作用，同时与水文和地貌特征一起影响鱼类群落。本文的目的是划分和量化河岸带（河岸基质类型、河岸坡度、河岸植被覆盖类型和主要河道上的河岸植被覆盖百分比）、物理生境（河道宽度和深度、基质类型和河道中的水生栖息地、水流速度和有机物）、水质（浊度、温度、电导率、pH 值、溶解氧和叶绿素浓度）和空间变量（采样点之间的线性距离）对巴西中部分水河流上游流域的鱼类群落（每个物种的丰富度和丰度）的影响。为此，在河岸带、物理生境、水和空间变量组之间进行了变异划分分析，并进行了冗余分析来量化变量对鱼类群落的影响。只有物理生境和水质变量影响鱼类群落（每个物种的丰富度和丰度）。
