Calderon Mirian R, González Patricia, Moglia Marta, Gonzáles Soledad Oliva, Jofré Mariana
Environ Monit Assess. 2014 Jul;186(7):4411-22. doi: 10.1007/s10661-014-3707-8.
Urbanization can cause significant changes in the integrity of fluvial ecosystems, which makes it necessary to assess environmental conditions of areas where population growth rates are high. A study of the environmental quality of Chorrillos River (San Luis-Argentina) and its tributaries was carried out in order to evaluate the potential effect of an urbanization gradient. Six sites were sampled along the main course and tributaries of the river. Urbanization variables were measured and included to calculate an Urbanization Index. Physical–chemical analyses were performed in water samples to evaluate water quality through the use of a simplified index of water quality (SIWQ). Plants, macroinvertebrates, and amphibians metrics were used to assess the biological state of the studied sites. The Urbanization Index varied significantly between sites and was significantly correlated to the SIWQ. However, no significant correlations were found between SIWQ and macroinvertebrates and amphibians variables. Water quality of Chorrillos River and its tributaries is good, but it is affected by anthropic influences as reflected by the declining of SIWQ values. Although biological sampling constitutes an important tool in the assessment of water quality of rivers, in this report biological results were not conclusive.
城市化会导致河流生态系统的完整性发生重大变化，这使得有必要评估人口增长率高的地区的环境状况。为了评估城市化梯度的潜在影响，对乔里洛斯河（阿根廷圣路易斯）及其支流的环境质量进行了一项研究。沿着河流的主河道和支流采集了六个采样点的样本。测量了城市化变量并将其纳入以计算城市化指数。对水样进行了物理化学分析，通过使用简化水质指数（SIWQ）来评估水质。利用植物、大型无脊椎动物和两栖动物指标来评估研究地点的生物状态。各采样点之间的城市化指数差异显著，且与SIWQ显著相关。然而，在SIWQ与大型无脊椎动物和两栖动物变量之间未发现显著相关性。乔里洛斯河及其支流的水质良好，但如SIWQ值下降所反映的那样，受到人为影响。尽管生物采样是评估河流水质的重要工具，但在本报告中，生物结果并不具有决定性。
