厄瓜多尔西北部阿塔卡梅斯河本地鱼类多样性和分布的变化与两种入侵物种的存在

IF 0.8 4区生物学 Q4 PLANT SCIENCES

Bothalia Pub Date : 2020-08-25 DOI:10.15446/ABC.V26N1.81888

Pedro Jorge Jiménez Prado, Fernando Welington Vásquez Galarza

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引用次数: 1

摘要

生物多样性的解释可能非常复杂，因为它存在一个基于物种起源和多样化的动态，除了人为影响，如入侵物种的引入，可能导致本地物种的局部灭绝。本研究的目的是分析厄瓜多尔西北部阿塔卡梅斯河沿岸鱼系动物组成和分布的时间变化(2012年和2017年)。在2012年，我们记录了:1)Astyanax ruberrimus的存在，据报道，到2017年，该物种在当地已经灭绝;2)罗非鱼(Orechromis niloticus)是唯一引进的鱼类，直到2017年加入了非本地的孔雀鱼(Poecilia gillii)。此外，人类活动的增加导致河道鱼类的多样性、丰度和分布发生变化，导致部分物种向流域上游分散。

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CAMBIOS EN DIVERSIDAD Y DISTRIBUCIÓN DE PECES NATIVOS CON LA PRESENCIA DE DOS ESPECIES INVASORAS EN EL RÍO ATACAMES, NOROCCIDENTE DEL ECUADOR

The interpretation of biological diversity can be very complex, as it exists a dynamic based on the origin and diversification of species, in addition to anthropogenic effects, such as the introduction of invasive species, which can result in the local extinction of the native ones. The aim of this study was to analyze the temporal variation (2012 and 2017), in composition and distribution of the ichthyofauna along the Atacames River in northwestern Ecuador. In 2012 we recorded: 1) the presence of Astyanax ruberrimus , which was reported locally extinct by 2017; and 2) the tilapia ( Orechromis niloticus ) as the only introduced fish species present until 2017, when the addition of the non-native guppy ( Poecilia gillii ) occurred . In addition, the increase in human activities conduced to change in diversity, abundance and distribution of fish along the watercourse, which resulted in dispersing of some species towards the upper reaches of the river basin.

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来源期刊

Bothalia 生物-植物科学

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： Bothalia: African Biodiversity & Conservation is published by AOSIS for the South African National Biodiversity Institute (SANBI) and aims to disseminate knowledge, information and innovative approaches that promote and enhance the wise use and management of biodiversity in order to sustain the systems and species that support and benefit the people of Africa. The journal was previously published as Bothalia, and had served the South African botanical community since 1921. However the expanded mandate of SANBI necessitated a broader scope for the journal, and in 2014, the subtitle, African Biodiversity & Conservation was added to reflect this change.