A Review of Microhydromys (Rodentia: Murinae), with Description of a New Species from Southern New Guinea

Helgen, Kristofer M.; Leary, Tanya; Aplin, Kenneth P.

doi:10.1206/632.1

Cited by 12 publications

(13 citation statements)

References 41 publications

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“…(, ), Helgen & Flannery (), Van Dyck (), Helgen (,b, ), Woolley (), Helgen et al . (, , ), Musser et al . (), Helgen & Helgen () and Musser & Lunde ().…”

Section: Methodsunclassified

Higher extinction rates of dasyurids on Australo‐Papuan continental shelf islands and the zoogeography of New Guinea mammals

Lavery

Fisher

Flannery

et al. 2013

Journal of Biogeography

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Aim Contemporary patterns of mammalian species richness on islands are influenced by well-understood biogeographical variables. Whether or not mammalian orders differ in their rates of persistence, however, remains uncertain. Our aims were to assess the persistence of four mammalian orders on Australo-Papuan continental shelf islands in relation to the faunas within adjacent zoogeographic provinces. We also aimed to define New Guinea's mammalian zoogeographic provinces quantitatively.Location New Guinea and 274 Australo-Papuan continental shelf islands.Methods We compiled 4194 distributional records for 264 of New Guinea's native mammals. Records were allocated to existing mapped bioregions. We used cluster analysis to allocate bioregions to zoogeographic provinces. Using generalized linear models, we determined the persistence of insular mammals as proportions of the species present within adjacent zoogeographic provinces. Persistence rates were calculated for four major orders (Dasyuromorphia, Diprotodontia, Peramelemorphia and Rodentia).Results The classification dendrogram grouped New Guinea's bioregions into three areas corresponding to the Oceanic, Tumbanan and Austral provinces. In all but two zoogeographic provinces, the proportions of Dasyuromorphia persisting on islands were lower than other orders. Overall, species of Dasyuromorphia were much less likely to persist on Australo-Papuan continental shelf islands.Main conclusions Unlike the other orders considered, dasyuromorphs are carnivorous and insectivorous and require large home ranges relative to body size. We suggest that the resulting low population densities might expose species in this order to higher rates of extinction on islands. Translocations of threatened mammals to predator-free islands are common, but our results suggest that insurance populations of threatened dasyurids on small islands may be less secure than translocations of other taxa. Our results support calls for insurance populations of the rapidly declining dasyurid, the Tasmanian devil (Sarcophilus harrisii), to be established on mainland Australia rather than on islands alone.

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“…(, ), Helgen & Flannery (), Van Dyck (), Helgen (,b, ), Woolley (), Helgen et al . (, , ), Musser et al . (), Helgen & Helgen () and Musser & Lunde ().…”

Section: Methodsunclassified

Higher extinction rates of dasyurids on Australo‐Papuan continental shelf islands and the zoogeography of New Guinea mammals

Lavery

Fisher

Flannery

et al. 2013

Journal of Biogeography

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“…Species composition within this defined New Guinea source pool region was determined from Flannery (), Bonoccorso (), Flannery and Groves (), Helgen and Flannery (), Van Dyck (), Helgen (2005a, c), Woolley (), Helgen (), Helgen et al (, ), Musser et al. (), Helgen and Helgen (), Musser and Lunde (), and Aplin et al.…”

Section: Methodsmentioning

confidence: 99%

The mammals of northernMelanesia: speciation, ecology, and biogeography

et al. 2015

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Analyses of the distributions of northern Melanesia's avifauna have helped researchers formulate major theories of evolution, speciation, and biogeography. In comparison, the region's mammalian fauna has been the subject of few empirical analyses of biogeography. Knowledge of mammalian biogeography is needed to formulate sound conservation strategies for mammals in the region and will help further advance these theories. We aim to assess the relative importance of biogeographic variables to mammalian zoogeography in northern Melanesia and empirically describe patterns of species richness. Using published literature, museum data bases and our own surveys, we compiled mammal inventories for 75 islands found within northern Melanesia (comprising the Admiralty, Bismarck, D‘Entrecasteaux, Louisiade, Solomon, and Trobriand Archipelagos). We used direct comparisons of family compositions and Ochiai and endemism indices to compare mammal assemblages between island groups and a defined New Guinea source pool region. Generalised linear models and non‐parametric multivariate analyses were used to identify, and rank, the importance of local and regional scale abiotic variables for mammalian species richness. Northern Melanesia's islands are depauperate in marsupials and have a moderate diversity of insectivorous bats and a diversity of pteropodid bats that exceeds that known to occur in the adjacent northeastern area of New Guinea. The Solomon Islands are conspicuous for their outstandingly high mammalian endemism. The mammalian fauna of northern Melanesia's islands was related primarily to island size and secondarily to isolation. Island size best explained inter‐island variation in total mammal species richness and bat species richness. The linear distance to New Guinea best explained the species richness of non‐volant mammals. Our results reveal islands that are in need of survey focus because their mammal inventories are lower than expected for their size, and we highlight areas of endemism where conservation actions might be prioritised to prevent species extinctions.

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“…Definition of Australo-Papuan zoogeographic provinces required the amalgamation of an existing classification for Australia (Burbidge et al 2008) with my own, similar classification for New Guinea. To classify New Guinea's zoogeographic provinces I compiled 4194 distributional records for 264 of New Guinea's native mammals from Flannery (1995b), Hitchcock (1997Hitchcock ( , 1998, Bonoccorso (1998), Flannery and Groves (1998), Aplin et al (1999, Van Dyck (2002), Helgen and Flannery (2004a), Helgen (2005aHelgen ( ,c, 2007a, Woolley (2005), Helgen et al (2008Helgen et al ( , 2010Helgen et al ( , 2011, Musser et al (2008), Helgen and Helgen (2009) and Musser and Lunde (2009). Records were allocated to existing mapped bioregions (Wikramanayake et al 2001) and cluster analysis was then used to allocate bioregions to zoogeographic provinces.…”

Section: Biogeography (1) Long-term Persistence Of Non-volant Taxa Onmentioning

confidence: 99%

The mammals of Northern Melanesia: biogeography, systematics and ecology

Lavery¹

2015

Frontiers of Biogeography

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Northern Melanesia's mammals are poorly known, and perceived deficiencies in faunal records and taxonomic descriptions have, until now, hindered detailed analyses. I examined aspects of biogeography, systematics and ecology in the region's mammalian faunas. Generalized linear models (GLMs) were used to test for differences in rates of persistence in four orders of mammal on continental shelf islands. Ochiai and endemism indices were used to delineate regions of high endemism and influential biogeographic boundaries. A non-parametric multivariate regression tree and GLMs were used to identify the influences of abiotic variables on mammalian species richness. Genetic sequencing, microsatellite genotyping, morphological and ecological data were used to determine evolutionary relationships among the widespread insectivorous bat family, Hipposideridae. Northern Melanesia's islands support mammalian faunas that reflect the poor over-water dispersal abilities of non-volant mammals; lower rates of longterm persistence in dasyuromorphs and diprotodonts; pronounced diversification of the Family Pteropodidae; and comparative lack of speciation in insectivorous bat families. Analyses produced a clear hierarchical classification of Northern Melanesia's islands based on their physical attributes and mammal assemblages, providing the first empirical analyses of Northern Melanesia's and New Guinea's mammalian zoogeography, and adding to biogeographic theory at both regional and local scales.

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A Review of Microhydromys (Rodentia: Murinae), with Description of a New Species from Southern New Guinea

Cited by 12 publications

References 41 publications

Higher extinction rates of dasyurids on Australo‐Papuan continental shelf islands and the zoogeography of New Guinea mammals

Higher extinction rates of dasyurids on Australo‐Papuan continental shelf islands and the zoogeography of New Guinea mammals

The mammals of northernMelanesia: speciation, ecology, and biogeography

The mammals of Northern Melanesia: biogeography, systematics and ecology

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