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Changes and drivers of freshwater mussel diversity and distribution in northern Borneo

Zieritz, Alexandra; Bogan, Arthur E.; Rahim, Khairil Adha; Jainih, Ronaldo Sousa Leonardo; Harun, Sahana; Abd Razak, Nabilah Fatin; Gallardo, Belinda; McGowan, Suzanne; Hassan, Ruhana; Lopes-Lima, Manuel

Authors

Arthur E. Bogan

Khairil Adha Rahim

Ronaldo Sousa Leonardo Jainih

Sahana Harun

Nabilah Fatin Abd Razak

Belinda Gallardo

Ruhana Hassan

Manuel Lopes-Lima



Abstract

Human activities are threatening Borneo's unique biodiversity, but little is known on the status of freshwater invertebrates. We assessed changes in diversity and distribution of freshwater mussels (Bivalvia: Unionida) in northern Borneo, and identified drivers of present distribution and threats. Past distribution data were collected from literature and museum resources. Present distribution data were collected from 21 river basins, and 47 water quality, climatic, landscape and human variables explored as potential predictors of species presence/absence. Species delimitations were identified by morphology and COI barcoding, and haplotype networks generated. Our data indicate that over the past 50 years, four of originally five native species have become very rare or possibly locally extirpated. Since these four species are endemic to Borneo, other Bornean river basins should urgently be surveyed to identify any remaining populations. In the same time span, the non-native Sinanodonta woodiana has become the most widespread freshwater mussel in northern Borneo. The fifth native species was identified as Rectidens sumatrensis and found in four Sarawakian river basins, thus contradicting previous assumptions of an endemic Bornean Rectidens species. Although a number of stable R. sumatrensis populations are retained across Sarawak, the species' strong spatial contraction in mainland Sundaland and apparent low tolerance to eutrophication suggest that it is vulnerable to further habitat alteration. Our results indicate that Borneo's (endemic) freshwater invertebrate biodiversity is declining rapidly. Comprehensive surveys targeting an array of invertebrate and vertebrate taxa are needed to identify Borneo's freshwater biodiversity hotspots, where conservation efforts should be concentrated.

Citation

Zieritz, A., Bogan, A. E., Rahim, K. A., Jainih, R. S. L., Harun, S., Abd Razak, N. F., …Lopes-Lima, M. (2018). Changes and drivers of freshwater mussel diversity and distribution in northern Borneo. Biological Conservation, 219, https://doi.org/10.1016/j.biocon.2018.01.012

Journal Article Type Article
Acceptance Date Jan 12, 2018
Online Publication Date Feb 3, 2018
Publication Date Mar 1, 2018
Deposit Date Feb 5, 2018
Publicly Available Date Aug 4, 2019
Journal Biological Conservation
Print ISSN 0006-3207
Electronic ISSN 0006-3207
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 219
DOI https://doi.org/10.1016/j.biocon.2018.01.012
Keywords Extinction; Deforestation; Endemic species; Invertebrates; Sundaland; Unionidae
Public URL http://eprints.nottingham.ac.uk/id/eprint/49561
Publisher URL https://www.sciencedirect.com/science/article/pii/S0006320717310467
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Zieritz et al 2018 Biol Cons pre-print.pdf (538 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





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