鲶鱼的保护、生态和管理:第二国际研讨会

Ictalurids在爱荷华州的小溪和河流:状态、分布,以及与生物的关系的完整性

安东尼·r·Sindt杰西·r·菲舍尔迈克尔·c·林鸽和粘土l·皮尔斯

doi:https://doi.org/10.47886/9781934874257.ch29

文摘.-Anthropogenic改变爱荷华州的景观极大地改变激流的系统,进而影响淡水动物的生物多样性。Ictalurids属于一种种类繁多的鱼类和水生生态系统发挥重要的生态作用。然而,很少有人知道他们的分布和激流的系统在爱荷华州的地位。本研究的目的是描述的分布ictalurids在爱荷华州,并检查其与小溪和河流的生态完整性的关系。历史数据(即。,1884–2002) compiled for the Iowa Aquatic Gap Analysis Project (IAGAP) were used to detect declines in the distribution of ictalurids in Iowa streams and rivers at stream segment and watershed scales. Eight variables characterizing ictalurid assemblages were used to evaluate relationships with index of biotic integrity (IBI) ratings. Comparisons of recent and historic data from the IAGAP database indicated that 9 of Iowa’s 10 ictalurid species experienced distribution declines at one or more spatial scales. Analysis of variance indicated that ictalurid assemblages differed among samples with different IBI ratings. Specifically, total ictalurid, sensitive ictalurid, andNoturus种虫害丰富增加IBI评级增加。结果表明下降ictalurid物种分布和生物的完整性是相关的,和管理策略旨在改善和增加生物完整性将受益ictalurid物种栖息地。