Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania

This study was conducted in the KVRS to; evaluate the seasonal eco-toxicity of water, soil and sediment samples; establish the suitability of using temperate biotest batteries in tropical systems; classify the toxicity of samples using Fuzzy Rules to estimate potential ecological risks. 143 water, s...

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Autores principales:	S. F. Materu, S. Heise
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2019
Materias:	agricultural fields bioassays fuzzy rules ramsar wetlands risk assessment Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/9b656bbe5e6b4166b49b0c0feebb2a3a
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spelling	oai:doaj.org-article:9b656bbe5e6b4166b49b0c0feebb2a3a2021-12-02T16:25:31ZEco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania2332-887810.1080/20964129.2019.1695545https://doaj.org/article/9b656bbe5e6b4166b49b0c0feebb2a3a2019-01-01T00:00:00Zhttp://dx.doi.org/10.1080/20964129.2019.1695545https://doaj.org/toc/2332-8878This study was conducted in the KVRS to; evaluate the seasonal eco-toxicity of water, soil and sediment samples; establish the suitability of using temperate biotest batteries in tropical systems; classify the toxicity of samples using Fuzzy Rules to estimate potential ecological risks. 143 water, sediment, and soil samples were collected during dry and rainy seasons in plantation areas. Pseudokirchneriella subcapitata, Aliivibrio fischeri and Arthrobacter globiformis bioassays were used to assess the toxicity of the samples. Results were categorized and classified into toxicity classes. Dry season presented a significantly higher mean inhibition of 31% than 5% shown by rainy season samples (p < 0.001) in the bacterial bioassays, indicating a lower concentration of contaminants due to flooding and increased surface runoff. A few sediment samples resulted into 100% inhibition of A. globiformis, implying organisms were physiologically inactive upon exposure to contaminants. Seventy-three percent of samples posed little or no toxic potential risk, 25% posed critical risk and 1% posed elevated critical risk, implying the KVRS ecosystem might be at risk if the extensive usage of pesticides in the area is not well managed and monitored. The temperate micro-biotests can be used in tropical systems, but with further research on suitable organisms and standardized methods.S. F. MateruS. HeiseTaylor & Francis Grouparticleagricultural fieldsbioassaysfuzzy rulesramsar wetlandsrisk assessmentEcologyQH540-549.5ENEcosystem Health and Sustainability, Vol 5, Iss 1, Pp 256-269 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	agricultural fields bioassays fuzzy rules ramsar wetlands risk assessment Ecology QH540-549.5
spellingShingle	agricultural fields bioassays fuzzy rules ramsar wetlands risk assessment Ecology QH540-549.5 S. F. Materu S. Heise Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania
description	This study was conducted in the KVRS to; evaluate the seasonal eco-toxicity of water, soil and sediment samples; establish the suitability of using temperate biotest batteries in tropical systems; classify the toxicity of samples using Fuzzy Rules to estimate potential ecological risks. 143 water, sediment, and soil samples were collected during dry and rainy seasons in plantation areas. Pseudokirchneriella subcapitata, Aliivibrio fischeri and Arthrobacter globiformis bioassays were used to assess the toxicity of the samples. Results were categorized and classified into toxicity classes. Dry season presented a significantly higher mean inhibition of 31% than 5% shown by rainy season samples (p < 0.001) in the bacterial bioassays, indicating a lower concentration of contaminants due to flooding and increased surface runoff. A few sediment samples resulted into 100% inhibition of A. globiformis, implying organisms were physiologically inactive upon exposure to contaminants. Seventy-three percent of samples posed little or no toxic potential risk, 25% posed critical risk and 1% posed elevated critical risk, implying the KVRS ecosystem might be at risk if the extensive usage of pesticides in the area is not well managed and monitored. The temperate micro-biotests can be used in tropical systems, but with further research on suitable organisms and standardized methods.
format	article
author	S. F. Materu S. Heise
author_facet	S. F. Materu S. Heise
author_sort	S. F. Materu
title	Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania
title_short	Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania
title_full	Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania
title_fullStr	Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania
title_full_unstemmed	Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania
title_sort	eco-toxicity of water, soil, and sediment from agricultural areas of kilombero valley ramsar wetlands, tanzania
publisher	Taylor & Francis Group
publishDate	2019
url	https://doaj.org/article/9b656bbe5e6b4166b49b0c0feebb2a3a
work_keys_str_mv	AT sfmateru ecotoxicityofwatersoilandsedimentfromagriculturalareasofkilomberovalleyramsarwetlandstanzania AT sheise ecotoxicityofwatersoilandsedimentfromagriculturalareasofkilomberovalleyramsarwetlandstanzania
_version_	1718384070126206976

Eco-toxicity of water, soil, and sediment from agricultural areas of Kilombero Valley Ramsar wetlands, Tanzania

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