Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters

Benthic diatoms form an important component of the microphytobenthos and have long been utilised as suitable bioindicators in aquatic systems. However, knowledge on benthic diatom community succession on hard substrata (biofilm) remains understudied in austral marine coastal systems. In this study,...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Phumlile Cotiyane-Pondo, Thomas G. Bornman
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	coastal systems biofilm diatom composition succession diversity South Africa Evolution QH359-425 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/8b76f06b9be24c1689d60c0b72c85b48
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8b76f06b9be24c1689d60c0b72c85b48
record_format	dspace
spelling	oai:doaj.org-article:8b76f06b9be24c1689d60c0b72c85b482021-12-01T18:40:15ZEnvironmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters2296-701X10.3389/fevo.2021.767960https://doaj.org/article/8b76f06b9be24c1689d60c0b72c85b482021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fevo.2021.767960/fullhttps://doaj.org/toc/2296-701XBenthic diatoms form an important component of the microphytobenthos and have long been utilised as suitable bioindicators in aquatic systems. However, knowledge on benthic diatom community succession on hard substrata (biofilm) remains understudied in austral marine coastal systems. In this study, we investigated benthic diatom colonisation on artificial substrates (Plexiglass) over a period of 5 weeks at two locations with different physical environments along the warm temperate coast of South Africa. Results revealed relatively similar physico-chemical conditions but highly contrasting diatom community development were observed between the two sites. While there were some shared taxa, site-specific dynamics resulted in significantly different diatom species diversity and richness, facilitated by common (e.g., Nitzschia ventricosa and Cocconeis scutellum) and a large percentage of rarely observed species such as Cocconeis testudo and Lyrella lyra. A total of 134 species belonging to 44 genera were observed during the study. The overall diatom composition differed spatio-temporally during the experimental period, with the fluctuating species occurrences and abundances highlighting the rapid microalgal species turnover within days, under natural conditions. Environmental variables were shown to have varying influences as drivers of the diatom community descriptors. Multivariate modelling confirmed that study site and the interaction between site and sampling occasion were important predictors of diatom abundances, and the overall observed community composition. The current results suggest that benthic diatoms on artificial substrata could be incorporated as suitable indicators of change along the coastline subject to further investigations, taking into account site-specific differences driven by habitat complexity and environmental variability. The experimental method proved to be efficient and can be implemented to study the response of benthic diatoms to localised nutrient enrichment around the coastline.Phumlile Cotiyane-PondoPhumlile Cotiyane-PondoThomas G. BornmanThomas G. BornmanFrontiers Media S.A.articlecoastal systemsbiofilmdiatom compositionsuccessiondiversitySouth AfricaEvolutionQH359-425EcologyQH540-549.5ENFrontiers in Ecology and Evolution, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coastal systems biofilm diatom composition succession diversity South Africa Evolution QH359-425 Ecology QH540-549.5
spellingShingle	coastal systems biofilm diatom composition succession diversity South Africa Evolution QH359-425 Ecology QH540-549.5 Phumlile Cotiyane-Pondo Phumlile Cotiyane-Pondo Thomas G. Bornman Thomas G. Bornman Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters
description	Benthic diatoms form an important component of the microphytobenthos and have long been utilised as suitable bioindicators in aquatic systems. However, knowledge on benthic diatom community succession on hard substrata (biofilm) remains understudied in austral marine coastal systems. In this study, we investigated benthic diatom colonisation on artificial substrates (Plexiglass) over a period of 5 weeks at two locations with different physical environments along the warm temperate coast of South Africa. Results revealed relatively similar physico-chemical conditions but highly contrasting diatom community development were observed between the two sites. While there were some shared taxa, site-specific dynamics resulted in significantly different diatom species diversity and richness, facilitated by common (e.g., Nitzschia ventricosa and Cocconeis scutellum) and a large percentage of rarely observed species such as Cocconeis testudo and Lyrella lyra. A total of 134 species belonging to 44 genera were observed during the study. The overall diatom composition differed spatio-temporally during the experimental period, with the fluctuating species occurrences and abundances highlighting the rapid microalgal species turnover within days, under natural conditions. Environmental variables were shown to have varying influences as drivers of the diatom community descriptors. Multivariate modelling confirmed that study site and the interaction between site and sampling occasion were important predictors of diatom abundances, and the overall observed community composition. The current results suggest that benthic diatoms on artificial substrata could be incorporated as suitable indicators of change along the coastline subject to further investigations, taking into account site-specific differences driven by habitat complexity and environmental variability. The experimental method proved to be efficient and can be implemented to study the response of benthic diatoms to localised nutrient enrichment around the coastline.
format	article
author	Phumlile Cotiyane-Pondo Phumlile Cotiyane-Pondo Thomas G. Bornman Thomas G. Bornman
author_facet	Phumlile Cotiyane-Pondo Phumlile Cotiyane-Pondo Thomas G. Bornman Thomas G. Bornman
author_sort	Phumlile Cotiyane-Pondo
title	Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters
title_short	Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters
title_full	Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters
title_fullStr	Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters
title_full_unstemmed	Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters
title_sort	environmental heterogeneity determines diatom colonisation on artificial substrata: implications for biomonitoring in coastal marine waters
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/8b76f06b9be24c1689d60c0b72c85b48
work_keys_str_mv	AT phumlilecotiyanepondo environmentalheterogeneitydeterminesdiatomcolonisationonartificialsubstrataimplicationsforbiomonitoringincoastalmarinewaters AT phumlilecotiyanepondo environmentalheterogeneitydeterminesdiatomcolonisationonartificialsubstrataimplicationsforbiomonitoringincoastalmarinewaters AT thomasgbornman environmentalheterogeneitydeterminesdiatomcolonisationonartificialsubstrataimplicationsforbiomonitoringincoastalmarinewaters AT thomasgbornman environmentalheterogeneitydeterminesdiatomcolonisationonartificialsubstrataimplicationsforbiomonitoringincoastalmarinewaters
_version_	1718404704973619200

Environmental Heterogeneity Determines Diatom Colonisation on Artificial Substrata: Implications for Biomonitoring in Coastal Marine Waters

Ejemplares similares