Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams

Fluoroprobes, such as BenthoTorch, offer a relatively rapid in situ method for monitoring benthic algae, provide new opportunities for aquatic ecological research, and enable early warning of algal proliferation in municipal water supplies. Currently, however, BenthoTorch is limited for the measurem...

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Autores principales:	D. Rosero-López, M.T. Walter, A.S. Flecker, D.F. Ontaneda, O. Dangles
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	BenthoTorch Chlorophyll-a Artificial substrates Light Thickness Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/c37e172a95f04b5ea6159907fb802a95
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spelling	oai:doaj.org-article:c37e172a95f04b5ea6159907fb802a952021-12-01T04:37:49ZStandardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams1470-160X10.1016/j.ecolind.2020.107185https://doaj.org/article/c37e172a95f04b5ea6159907fb802a952021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20311249https://doaj.org/toc/1470-160XFluoroprobes, such as BenthoTorch, offer a relatively rapid in situ method for monitoring benthic algae, provide new opportunities for aquatic ecological research, and enable early warning of algal proliferation in municipal water supplies. Currently, however, BenthoTorch is limited for the measurement of heterogeneous samples, and homogenizing samples is rather difficult. In this study, we compared chlorophyll-a (Chl-a) measurements between BenthoTorch and standard laboratory methods to quantify and describe the biomass and biovolume proportion of benthic algae growing on artificial and natural substrates. We used the difference in Chl-a measurements between these methods (n = 359) to evaluate the effects of environmental variables. Moreover, we used artificial and natural substrates to determine whether either of them reduced variation in BenthoTorch measurements. There was a general concordance in measurements between the two methods, but this agreement was stronger for artificial substrates. Artificial substrates also led to significantly less variation in BenthoTorch readings compared with natural substrates. This may be attributed to the formation of relatively thin algal mats on artificial substrates. To enable early warning of algal proliferation in an aquatic ecosystem, we recommend the use of BenthoTorch and artificial substrates combined with appropriate calibration using standard laboratory methods. The ability of BenthoTorch to produce instantaneous results facilitates replicate collection, which reduces sampling error and increases sampling area on the same day. Despite substantial variation in readings on natural substrates, BenthoTorch enables relatively rapid measurements, facilitating easy monitoring of large areas. Therefore, BenthoTorch may be worth incorporating into aquatic ecosystem studies, depending on the specific research questions.D. Rosero-LópezM.T. WalterA.S. FleckerD.F. OntanedaO. DanglesElsevierarticleBenthoTorchChlorophyll-aArtificial substratesLightThicknessEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107185- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	BenthoTorch Chlorophyll-a Artificial substrates Light Thickness Ecology QH540-549.5
spellingShingle	BenthoTorch Chlorophyll-a Artificial substrates Light Thickness Ecology QH540-549.5 D. Rosero-López M.T. Walter A.S. Flecker D.F. Ontaneda O. Dangles Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
description	Fluoroprobes, such as BenthoTorch, offer a relatively rapid in situ method for monitoring benthic algae, provide new opportunities for aquatic ecological research, and enable early warning of algal proliferation in municipal water supplies. Currently, however, BenthoTorch is limited for the measurement of heterogeneous samples, and homogenizing samples is rather difficult. In this study, we compared chlorophyll-a (Chl-a) measurements between BenthoTorch and standard laboratory methods to quantify and describe the biomass and biovolume proportion of benthic algae growing on artificial and natural substrates. We used the difference in Chl-a measurements between these methods (n = 359) to evaluate the effects of environmental variables. Moreover, we used artificial and natural substrates to determine whether either of them reduced variation in BenthoTorch measurements. There was a general concordance in measurements between the two methods, but this agreement was stronger for artificial substrates. Artificial substrates also led to significantly less variation in BenthoTorch readings compared with natural substrates. This may be attributed to the formation of relatively thin algal mats on artificial substrates. To enable early warning of algal proliferation in an aquatic ecosystem, we recommend the use of BenthoTorch and artificial substrates combined with appropriate calibration using standard laboratory methods. The ability of BenthoTorch to produce instantaneous results facilitates replicate collection, which reduces sampling error and increases sampling area on the same day. Despite substantial variation in readings on natural substrates, BenthoTorch enables relatively rapid measurements, facilitating easy monitoring of large areas. Therefore, BenthoTorch may be worth incorporating into aquatic ecosystem studies, depending on the specific research questions.
format	article
author	D. Rosero-López M.T. Walter A.S. Flecker D.F. Ontaneda O. Dangles
author_facet	D. Rosero-López M.T. Walter A.S. Flecker D.F. Ontaneda O. Dangles
author_sort	D. Rosero-López
title	Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
title_short	Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
title_full	Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
title_fullStr	Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
title_full_unstemmed	Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
title_sort	standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/c37e172a95f04b5ea6159907fb802a95
work_keys_str_mv	AT droserolopez standardizationofinstantaneousfluoroprobemeasurementsofbenthicalgalbiomassandcompositioninstreams AT mtwalter standardizationofinstantaneousfluoroprobemeasurementsofbenthicalgalbiomassandcompositioninstreams AT asflecker standardizationofinstantaneousfluoroprobemeasurementsofbenthicalgalbiomassandcompositioninstreams AT dfontaneda standardizationofinstantaneousfluoroprobemeasurementsofbenthicalgalbiomassandcompositioninstreams AT odangles standardizationofinstantaneousfluoroprobemeasurementsofbenthicalgalbiomassandcompositioninstreams
_version_	1718405867962892288

Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams

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