A macroinvertebrate multi-metric index for Ethiopian highland streams

Temesgen Alemneh*, Argaw Ambelu, Benjamin F. Zaitchik, Simon Bahrndorff, Seid Tiku Mereta, Cino Pertoldi

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Resumé

Headwater streams in the highland regions of Ethiopia are exposed to severe human disturbances because of rapid population growth. Protection and management of headwater streams require the development of informative indices that can capture disturbance and assess streams water quality in highland regions. Therefore, we developed a multi-metric index based on macroinvertebrate communities, to assess the ecological condition of the headwater streams in the Ethiopian highlands. We reviewed 38 potential metrics, representing various aspects of the macroinvertebrate assemblages, and selected four of them [total family richness, Simpson index, percentage of shredder, and family richness of EOT (Ephemeroptera, Odonata, and Trichoptera)] as final core metrics. A trisection inter-quartile range system was applied to derive scores for each core metric at impaired and reference sites. The macroinvertebrate multi-metric index (MMI) distinguished well between impaired and reference stream sites and was negatively correlated with the degree of disturbance. The results suggest that the MMI is robust measure of disturbance and can be used as a sensitive tool for evaluating the ecological condition of headwater streams in Ethiopian highlands.

OriginalsprogEngelsk
TidsskriftHydrobiologia
Antal sider17
ISSN0018-8158
DOI
StatusUdgivet - 2019

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macroinvertebrates
macroinvertebrate
highlands
headwater
upland region
disturbance
Odonata
Trichoptera
Ephemeroptera
Ethiopia
index
population growth
water quality
family

Citer dette

Alemneh, Temesgen ; Ambelu, Argaw ; Zaitchik, Benjamin F. ; Bahrndorff, Simon ; Mereta, Seid Tiku ; Pertoldi, Cino. / A macroinvertebrate multi-metric index for Ethiopian highland streams. I: Hydrobiologia. 2019.
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abstract = "Headwater streams in the highland regions of Ethiopia are exposed to severe human disturbances because of rapid population growth. Protection and management of headwater streams require the development of informative indices that can capture disturbance and assess streams water quality in highland regions. Therefore, we developed a multi-metric index based on macroinvertebrate communities, to assess the ecological condition of the headwater streams in the Ethiopian highlands. We reviewed 38 potential metrics, representing various aspects of the macroinvertebrate assemblages, and selected four of them [total family richness, Simpson index, percentage of shredder, and family richness of EOT (Ephemeroptera, Odonata, and Trichoptera)] as final core metrics. A trisection inter-quartile range system was applied to derive scores for each core metric at impaired and reference sites. The macroinvertebrate multi-metric index (MMI) distinguished well between impaired and reference stream sites and was negatively correlated with the degree of disturbance. The results suggest that the MMI is robust measure of disturbance and can be used as a sensitive tool for evaluating the ecological condition of headwater streams in Ethiopian highlands.",
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A macroinvertebrate multi-metric index for Ethiopian highland streams. / Alemneh, Temesgen; Ambelu, Argaw; Zaitchik, Benjamin F.; Bahrndorff, Simon; Mereta, Seid Tiku; Pertoldi, Cino.

I: Hydrobiologia, 2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - A macroinvertebrate multi-metric index for Ethiopian highland streams

AU - Alemneh, Temesgen

AU - Ambelu, Argaw

AU - Zaitchik, Benjamin F.

AU - Bahrndorff, Simon

AU - Mereta, Seid Tiku

AU - Pertoldi, Cino

PY - 2019

Y1 - 2019

N2 - Headwater streams in the highland regions of Ethiopia are exposed to severe human disturbances because of rapid population growth. Protection and management of headwater streams require the development of informative indices that can capture disturbance and assess streams water quality in highland regions. Therefore, we developed a multi-metric index based on macroinvertebrate communities, to assess the ecological condition of the headwater streams in the Ethiopian highlands. We reviewed 38 potential metrics, representing various aspects of the macroinvertebrate assemblages, and selected four of them [total family richness, Simpson index, percentage of shredder, and family richness of EOT (Ephemeroptera, Odonata, and Trichoptera)] as final core metrics. A trisection inter-quartile range system was applied to derive scores for each core metric at impaired and reference sites. The macroinvertebrate multi-metric index (MMI) distinguished well between impaired and reference stream sites and was negatively correlated with the degree of disturbance. The results suggest that the MMI is robust measure of disturbance and can be used as a sensitive tool for evaluating the ecological condition of headwater streams in Ethiopian highlands.

AB - Headwater streams in the highland regions of Ethiopia are exposed to severe human disturbances because of rapid population growth. Protection and management of headwater streams require the development of informative indices that can capture disturbance and assess streams water quality in highland regions. Therefore, we developed a multi-metric index based on macroinvertebrate communities, to assess the ecological condition of the headwater streams in the Ethiopian highlands. We reviewed 38 potential metrics, representing various aspects of the macroinvertebrate assemblages, and selected four of them [total family richness, Simpson index, percentage of shredder, and family richness of EOT (Ephemeroptera, Odonata, and Trichoptera)] as final core metrics. A trisection inter-quartile range system was applied to derive scores for each core metric at impaired and reference sites. The macroinvertebrate multi-metric index (MMI) distinguished well between impaired and reference stream sites and was negatively correlated with the degree of disturbance. The results suggest that the MMI is robust measure of disturbance and can be used as a sensitive tool for evaluating the ecological condition of headwater streams in Ethiopian highlands.

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KW - Ethiopia

KW - Headwater streams

KW - Macroinvertebrates

KW - Multi-metric index

KW - Tropical

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