Taxonomy of epilithic diatoms and teratological forms under the presence of metals in surface sediment

Author:

AMARAL MAILOR WELLINTON WEDIGORCID,MEDEIROS GABRIELAORCID,DAUFENBACH VANESSAORCID,SAMPAIO SILVIO CESARORCID,REIS RALPHO RINALDO DOSORCID,LUDWIG THELMA ALVIM VEIGAORCID,BUENO NORMA CATARINAORCID

Abstract

Epilithic diatom species in eight sampling sites of the Cascavel River, Southern Brazil, were taxonomically analyzed. The studied streams are located in a predominantly urban micro-watershed, with distroferric red latosol (rich in Fe and Al), being characterized by distinct metals, predominantly acidic pH, and high conductivity. Overall, 221 diatom species were identified at infrageneric level. Pinnularia was the most representative genus in number of species (28 spp.), followed by Eunotia (25 spp.), Gomphonema (17 spp.), Nitzschia (14 spp.), and Navicula (11 spp.). This is the first record of Fragilaria spectra, Fragilaria tenera var. nanana and Humidophila arcuatoides for the state of Paraná, and the first record of Pinnularia laucensis in Brazil. We found teratological valves in 34 taxa, containing modified outline, changes in the striae pattern, and doubled central area. The genus Eunotia showed the highest number of altered taxa (8 spp.). Mixed teratologies (deformed valve outline + unusual striae pattern) were found only in Ulnaria ulna, Encyonema neomesianum, and Gomphonema graciledictum. The metals and environmental variables in the Cascavel River micro-watershed likely contributed to the diatom teratologies. Our work contributes to the taxonomic knowledge of epilithic diatoms in the region, as well as extending the record of teratological taxa in the literature.

Publisher

Magnolia Press

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3