Bottino, F.

Bruce, A.

Kennedy, Michael P.

Lang, P.

Moore, I.

Murphy, K.

Sichingabula, H.

Tapia-Grimaldo, J.

Varandas-Martins, S.

This study tested the hypothesis that the measured niche-breadth of river plant species (macrophytes) occurring within a closely-defined geographical area in southern tropical Africa (Zambia), may predict the larger-scale biogeographical range of these species

Coventry University Pure Portal

http://curve.coventry.ac.uk/open     Regionally-defined niche-breadth of tropical African freshwater plant species predicts their global latitudinal range  Kennedy, M. , Lang, P. , Tapia-Grimaldo, J. , Varandas-Martins, S. , Bruce, A. , Moore, I. , Sichingabula, H. , Bottino, F. and Murphy, K.  Published PDF deposited in Curve May 2016  Original citation:  Kennedy, M. , Lang, P. , Tapia-Grimaldo, J. , Varandas-Martins, S. , Bruce, A. , Moore, I. , Sichingabula, H. , Bottino, F. and Murphy, K. (2016) 'Regionally-defined niche-breadth of tropical African freshwater plant species predicts their global latitudinal range' In: Geophysical Research Abstracts, 'European Geosciences Union General Assembly 2016'. Held 17-22 April 2016 at Vienna, Austria. , 9372.  URL: http://meetingorganizer.copernicus.org/EGU2016/posters/20288  Publisher: European Geosciences Union  Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.  CURVE is the Institutional Repository for Coventry University  Geophysical Research AbstractsVol. 18, EGU2016-9372, 2016EGU General Assembly 2016© Author(s) 2016. CC Attribution 3.0 License.Regionally-defined niche-breadth of tropical African freshwater plantspecies predicts their global latitudinal rangeMichael Kennedy (1,2), Pauline Lang (3,4), Julissa Tapia-Grimaldo (4), Sara Varandas-Martins (4), AllanahBruce (4), Isabel Moore (4), Henry Sichingabula (5), Flávia Bottino (6), and Kevin Murphy (4)(1) School of Energy, Construction and Environment, Coventry University, Coventry, CV1 5FB, UK(michael.kennedy@coventry.ac.uk), (2) School of Geosciences, University of Aberdeen, Aberdeen, AB24 5BW, UK, (3)Scottish Environment Protection Agency, 6 Parklands Avenue, Eurocentral, Holytown, North Lanarkshire, ML1 4WQ, UK,(4) University of Glasgow, Glasgow, G12 8QQ, UK, (5) Department of Geography and Environmental Studies, University ofZambia, Lusaka, Zambia, (6) Universidade Federal de São Carlos, Departamento de Hidrobiologia, Rodovia 17 WashingtonLuís, km 235, CEP: 13565-905, São Carlos, São Paulo State, BrasilThis study tested the hypothesis that the measured niche-breadth of river plant species (macrophytes) occurringwithin a closely-defined geographical area in southern tropical Africa (Zambia), may predict the larger-scalebiogeographical range of these species.Two measures of niche-breadth were calculated for 44 riverine macrophyte species commonly occurring inZambia, using an approach based on PCA ordination with bio-physico-chemical ordination input variables:altitude, stream order, stream flow, pH, conductivity, soluble reactive phosphate concentration (SRP), benthicmacroinvertebrate Average Score per Taxon (ASPT), and individual abundance of nine benthic macroinvertebratefamilies showing differing water quality tolerance, as indicated by their Sensitivity Weightings within theZambian Invertebrate Scoring System (ZISS). Macrophyte large-scale latitudinal range was derived from worldgeopositional records held by online databases, supplemented by records held by the authors.The two niche-breadth metrics divided the species into narrow-niche and intermediate/broad-niche cate-gories, showing significant variation in altitude, stream flow, conductivity, SRP and ASPT, but not streamorder or pH. There was no evidence to suggest that macrophyte alpha-diversity (as a measure of number ofindividual niches that may co-exist in a given habitat) showed any significant relationship with individual speciesniche-breadth. However, macrophyte alpha-diversity was significantly positively correlated with altitude, andsignificantly negatively related to conductivity, pH, ASPT, SRP, stream flow, and stream order. Narrow-nichemacrophyte species included a higher proportion of Afrotropical endemics than did species with broader nichesize. There were significant predictive relationships between macrophyte niche breadth and latitudinal range ofthe target species at global and Afrotropical scales, but not for the Neotropical range of species which occurred inboth the Neotropics and Zambia. Rare, narrow-niche species distributional data may account for this.The study found statistically-significant evidence that macrophyte species niche breadth, measured at siteswithin a limited latitudinal range of 9.83◦ in Zambian rivers, is a significant predictor of the latitudinal range sizeof these plants at global and Afrotropical bioregion scales; but not Neotropical range, for those species whichco-occurred both in Zambia and the Neotropics.

Regionally-defined niche-breadth of tropical African freshwater plant species predicts their global latitudinal range

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Regionally-defined niche-breadth of tropical African freshwater plant species predicts their global latitudinal range

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