Environmental drivers of aquatic macrophyte communities in southern tropical African rivers: Zambia as a case study

Michael P. Kennedy, Pauline Lang, Julissa Tapia Grimaldo, Sara Varandas Martins, Alannah Bruce, Adam Hastie, Steven Lowe, Magdi M. Ali, Henry Sichingabula, Helen Dallas, John Briggs, Kevin J. Murphy

    Research output: Contribution to journalArticle

    16 Citations (Scopus)
    65 Downloads (Pure)

    Abstract

    The first-ever extensive macrophyte survey of Zambian rivers and associated floodplain waterbodies, conducted during 2006–2012, collected 271 samples from 228 sites, mainly located in five freshwater ecoregions of the world primarily represented in Zambia. The results supported the hypothesis that variation in macrophyte community structure (measured as species composition and diversity) in southern tropical African river systems, using Zambia as a case study area, is driven primarily by geographical variation in water physico-chemical conditions. In total, 335 macrophyte taxa were recorded, and a chronological cumulative species records curve for the dataset showed no sign of asymptoting: clearly many additional macrophyte species remain to be found in Zambian rivers. Emergent macrophytes were predominant (236 taxa), together with 26 floating and 73 submerged taxa. Several species were rare in a regional or international context, including two IUCN Red Data List species: Aponogeton rehmanii and Nymphaea divaricata. Ordination and classification analysis of the data found little evidence for temporal change in vegetation, at repeatedly-sampled sites, but strong evidence for the existence of seven groups of samples from geographically-varied study sites. These supported differing sets of vegetation (with eight species assemblages present in the sample-groups) and showed substantial inter-group differences in both macrophyte alpha-diversity, and geographically-varying physico-chemical parameters. The evidence suggested that the main environmental drivers of macrophyte community composition and diversity were altitude, stream order, shade, pH, alkalinity, NO3-N, and underwater light availability, while PO4-P showed slightly lower, but still significant variation between sample-groups.
    NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, VOL 124, 2015 DOI: 10.1016/j.aquabot.2015.03.002

    © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
    Original languageEnglish
    Pages (from-to)19-28
    Number of pages9
    JournalAquatic Botany
    Volume124
    DOIs
    Publication statusPublished - Jul 2015

    Fingerprint

    aquatic communities
    Zambia
    macrophyte
    case studies
    rivers
    botany
    river
    Aponogeton
    Nymphaea
    sampling
    species diversity
    vegetation
    ecoregions
    peers
    alkalinity
    geographical variation
    macrophytes
    floodplains
    quality control
    data analysis

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, [124, (2015)] DOI: 10.1016/j.aquabot.2015.03.002

    © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Keywords

    • River plants
    • Africa
    • Macrophyte diversity
    • Tropical river ecology

    Cite this

    Environmental drivers of aquatic macrophyte communities in southern tropical African rivers : Zambia as a case study. / Kennedy, Michael P.; Lang, Pauline; Grimaldo, Julissa Tapia; Martins, Sara Varandas; Bruce, Alannah; Hastie, Adam; Lowe, Steven; Ali, Magdi M.; Sichingabula, Henry; Dallas, Helen; Briggs, John; Murphy, Kevin J.

    In: Aquatic Botany, Vol. 124, 07.2015, p. 19-28.

    Research output: Contribution to journalArticle

    Kennedy, MP, Lang, P, Grimaldo, JT, Martins, SV, Bruce, A, Hastie, A, Lowe, S, Ali, MM, Sichingabula, H, Dallas, H, Briggs, J & Murphy, KJ 2015, 'Environmental drivers of aquatic macrophyte communities in southern tropical African rivers: Zambia as a case study' Aquatic Botany, vol. 124, pp. 19-28. https://doi.org/10.1016/j.aquabot.2015.03.002
    Kennedy, Michael P. ; Lang, Pauline ; Grimaldo, Julissa Tapia ; Martins, Sara Varandas ; Bruce, Alannah ; Hastie, Adam ; Lowe, Steven ; Ali, Magdi M. ; Sichingabula, Henry ; Dallas, Helen ; Briggs, John ; Murphy, Kevin J. / Environmental drivers of aquatic macrophyte communities in southern tropical African rivers : Zambia as a case study. In: Aquatic Botany. 2015 ; Vol. 124. pp. 19-28.
    @article{3919a69b24ac442cafbac4bef4d1c6e6,
    title = "Environmental drivers of aquatic macrophyte communities in southern tropical African rivers: Zambia as a case study",
    abstract = "The first-ever extensive macrophyte survey of Zambian rivers and associated floodplain waterbodies, conducted during 2006–2012, collected 271 samples from 228 sites, mainly located in five freshwater ecoregions of the world primarily represented in Zambia. The results supported the hypothesis that variation in macrophyte community structure (measured as species composition and diversity) in southern tropical African river systems, using Zambia as a case study area, is driven primarily by geographical variation in water physico-chemical conditions. In total, 335 macrophyte taxa were recorded, and a chronological cumulative species records curve for the dataset showed no sign of asymptoting: clearly many additional macrophyte species remain to be found in Zambian rivers. Emergent macrophytes were predominant (236 taxa), together with 26 floating and 73 submerged taxa. Several species were rare in a regional or international context, including two IUCN Red Data List species: Aponogeton rehmanii and Nymphaea divaricata. Ordination and classification analysis of the data found little evidence for temporal change in vegetation, at repeatedly-sampled sites, but strong evidence for the existence of seven groups of samples from geographically-varied study sites. These supported differing sets of vegetation (with eight species assemblages present in the sample-groups) and showed substantial inter-group differences in both macrophyte alpha-diversity, and geographically-varying physico-chemical parameters. The evidence suggested that the main environmental drivers of macrophyte community composition and diversity were altitude, stream order, shade, pH, alkalinity, NO3-N, and underwater light availability, while PO4-P showed slightly lower, but still significant variation between sample-groups.NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, VOL 124, 2015 DOI: 10.1016/j.aquabot.2015.03.002{\circledC} 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/",
    keywords = "River plants, Africa, Macrophyte diversity, Tropical river ecology",
    author = "Kennedy, {Michael P.} and Pauline Lang and Grimaldo, {Julissa Tapia} and Martins, {Sara Varandas} and Alannah Bruce and Adam Hastie and Steven Lowe and Ali, {Magdi M.} and Henry Sichingabula and Helen Dallas and John Briggs and Murphy, {Kevin J.}",
    note = "NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, [124, (2015)] DOI: 10.1016/j.aquabot.2015.03.002 {\circledC} 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/",
    year = "2015",
    month = "7",
    doi = "10.1016/j.aquabot.2015.03.002",
    language = "English",
    volume = "124",
    pages = "19--28",
    journal = "Aquatic Botany",
    issn = "0304-3770",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Environmental drivers of aquatic macrophyte communities in southern tropical African rivers

    T2 - Zambia as a case study

    AU - Kennedy, Michael P.

    AU - Lang, Pauline

    AU - Grimaldo, Julissa Tapia

    AU - Martins, Sara Varandas

    AU - Bruce, Alannah

    AU - Hastie, Adam

    AU - Lowe, Steven

    AU - Ali, Magdi M.

    AU - Sichingabula, Henry

    AU - Dallas, Helen

    AU - Briggs, John

    AU - Murphy, Kevin J.

    N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, [124, (2015)] DOI: 10.1016/j.aquabot.2015.03.002 © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    PY - 2015/7

    Y1 - 2015/7

    N2 - The first-ever extensive macrophyte survey of Zambian rivers and associated floodplain waterbodies, conducted during 2006–2012, collected 271 samples from 228 sites, mainly located in five freshwater ecoregions of the world primarily represented in Zambia. The results supported the hypothesis that variation in macrophyte community structure (measured as species composition and diversity) in southern tropical African river systems, using Zambia as a case study area, is driven primarily by geographical variation in water physico-chemical conditions. In total, 335 macrophyte taxa were recorded, and a chronological cumulative species records curve for the dataset showed no sign of asymptoting: clearly many additional macrophyte species remain to be found in Zambian rivers. Emergent macrophytes were predominant (236 taxa), together with 26 floating and 73 submerged taxa. Several species were rare in a regional or international context, including two IUCN Red Data List species: Aponogeton rehmanii and Nymphaea divaricata. Ordination and classification analysis of the data found little evidence for temporal change in vegetation, at repeatedly-sampled sites, but strong evidence for the existence of seven groups of samples from geographically-varied study sites. These supported differing sets of vegetation (with eight species assemblages present in the sample-groups) and showed substantial inter-group differences in both macrophyte alpha-diversity, and geographically-varying physico-chemical parameters. The evidence suggested that the main environmental drivers of macrophyte community composition and diversity were altitude, stream order, shade, pH, alkalinity, NO3-N, and underwater light availability, while PO4-P showed slightly lower, but still significant variation between sample-groups.NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, VOL 124, 2015 DOI: 10.1016/j.aquabot.2015.03.002© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    AB - The first-ever extensive macrophyte survey of Zambian rivers and associated floodplain waterbodies, conducted during 2006–2012, collected 271 samples from 228 sites, mainly located in five freshwater ecoregions of the world primarily represented in Zambia. The results supported the hypothesis that variation in macrophyte community structure (measured as species composition and diversity) in southern tropical African river systems, using Zambia as a case study area, is driven primarily by geographical variation in water physico-chemical conditions. In total, 335 macrophyte taxa were recorded, and a chronological cumulative species records curve for the dataset showed no sign of asymptoting: clearly many additional macrophyte species remain to be found in Zambian rivers. Emergent macrophytes were predominant (236 taxa), together with 26 floating and 73 submerged taxa. Several species were rare in a regional or international context, including two IUCN Red Data List species: Aponogeton rehmanii and Nymphaea divaricata. Ordination and classification analysis of the data found little evidence for temporal change in vegetation, at repeatedly-sampled sites, but strong evidence for the existence of seven groups of samples from geographically-varied study sites. These supported differing sets of vegetation (with eight species assemblages present in the sample-groups) and showed substantial inter-group differences in both macrophyte alpha-diversity, and geographically-varying physico-chemical parameters. The evidence suggested that the main environmental drivers of macrophyte community composition and diversity were altitude, stream order, shade, pH, alkalinity, NO3-N, and underwater light availability, while PO4-P showed slightly lower, but still significant variation between sample-groups.NOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, VOL 124, 2015 DOI: 10.1016/j.aquabot.2015.03.002© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    KW - River plants

    KW - Africa

    KW - Macrophyte diversity

    KW - Tropical river ecology

    U2 - 10.1016/j.aquabot.2015.03.002

    DO - 10.1016/j.aquabot.2015.03.002

    M3 - Article

    VL - 124

    SP - 19

    EP - 28

    JO - Aquatic Botany

    JF - Aquatic Botany

    SN - 0304-3770

    ER -