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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Global variation in the beta diversity of lake macrophytes is driven by environmental heterogeneity rather than latitude
Author(s): Alahuhta, Janne
Kosten, Sarian
Akasaka, Munemitsu
Auderset, Dominique
Azzella, Mattia
Bolpagni, Rossano
Bove, Claudia P
Chambers, Patricia A
Chappuis, Eglantine
Ilg, Christiane
Clayton, John
de Winston, Mary
Ecke, Frauke
Gacia, Esperanca
Willby, Nigel
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Keywords: Alkalinity range
Altitudinal range
Aquatic plants
Freshwater ecosystem
Spatial extent
Species turnover
Issue Date: 31-Aug-2017
Date Deposited: 2-Feb-2017
Citation: Alahuhta J, Kosten S, Akasaka M, Auderset D, Azzella M, Bolpagni R, Bove CP, Chambers PA, Chappuis E, Ilg C, Clayton J, de Winston M, Ecke F, Gacia E & Willby N (2017) Global variation in the beta diversity of lake macrophytes is driven by environmental heterogeneity rather than latitude. Journal of Biogeography, 44 (8), pp. 1758-1769.
Abstract: Aim: We studied global variation in beta diversity patterns of lake macrophytes using regional data from across the world. Specifically, we examined 1) how beta diversity of aquatic macrophytes is partitioned between species turnover and nestedness within each study region, and 2) which environmental characteristics structure variation in these beta diversity components.  Location: Global  Methods: We used presence-absence data for aquatic macrophytes from 21 regions distributed around the world. We calculated pairwise-site and multiple-site beta diversity among lakes within each region using Sørensen dissimilarity index and partitioned it into turnover and nestedness coefficients. Beta regression was used to correlate the diversity coefficients with regional environmental characteristics. Results: Aquatic macrophytes showed different levels of beta diversity within each of the 21 study regions, with species turnover typically accounting for the majority of beta diversity, especially in high-diversity regions. However, nestedness contributed 30-50% of total variation in macrophyte beta diversity in low-diversity regions. The most important environmental factor explaining the three beta diversity coefficients (total, species turnover and nestedness) was altitudinal range, followed by relative areal extent of freshwater, latitude and water alkalinity range. Main conclusions: Our findings show that global patterns in beta diversity of lake macrophytes are caused by species turnover rather than by nestedness. These patterns in beta diversity were driven by natural environmental heterogeneity, notably variability in altitudinal range (also related to temperature variation) among regions. In addition, a greater range in alkalinity within a region, likely amplified by human activities, was also correlated with increased macrophyte beta diversity. These findings suggest that efforts to conserve aquatic macrophyte diversity should primarily focus on regions with large numbers of lakes that exhibit broad environmental gradients. 
DOI Link: 10.1111/jbi.12978
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. This is the peer reviewed version of the following article: Alahuhta, J., Kosten, S., Akasaka, M., et. al (2017), Global variation in the beta diversity of lake macrophytes is driven by environmental heterogeneity rather than latitude. J. Biogeogr., 44: 1758-1769., which has been published in final form at This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Notes: Additional co-authors: Gana Gecheva, Patrick Grillas, Jennifer Hauxwell, Seppo Hellsten, Jan Hjort, Mark V. Hoyer, Agnieszka Kolada, Minna Kuoppala, Torben Lauridsen, En‒Hua Li, Balázs A. Lukács, Marit Mjelde, Alison Mikulyuk, Roger P. Mormul, Jun Nishihiro, Beat Oertli, Laila Rhazi, Mouhssine Rhazi, Laura Sass, Christine Schranz, Martin Søndergaard, Takashi Yamanouchi, Qing Yu, Haijun Wang, Xiao‒Ke Zhang, Jani Heino

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