ORCID Profile
0000-0003-1693-6914
Current Organisation
Royal Holloway University of London
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Publisher: Geological Society of London
Date: 2011
DOI: 10.1144/SP355.9
Publisher: Oxford University Press (OUP)
Date: 28-07-2014
Abstract: Tropical Southeast (SE) Asia harbors extraordinary species richness and in its entirety comprises four of the Earth's 34 bio ersity hotspots. Here, we examine the assembly of the SE Asian biota through time and space. We conduct meta-analyses of geological, climatic, and biological (including 61 phylogenetic) data sets to test which areas have been the sources of long-term biological ersity in SE Asia, particularly in the pre-Miocene, Miocene, and Plio-Pleistocene, and whether the respective biota have been dominated by in situ ersification, immigration and/or emigration, or equilibrium dynamics. We identify Borneo and Indochina, in particular, as major "evolutionary hotspots" for a erse range of fauna and flora. Although most of the region's bio ersity is a result of both the accumulation of immigrants and in situ ersification, within-area ersification and subsequent emigration have been the predominant signals characterizing Indochina and Borneo's biota since at least the early Miocene. In contrast, colonization events are comparatively rare from younger volcanically active emergent islands such as Java, which show increased levels of immigration events. Few dispersal events were observed across the major biogeographic barrier of Wallace's Line. Accelerated efforts to conserve Borneo's flora and fauna in particular, currently housing the highest levels of SE Asian plant and mammal species richness, are critically required.
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 09-2014
Publisher: Annual Reviews
Date: 12-2011
DOI: 10.1146/ANNUREV-ECOLSYS-102710-145001
Abstract: The extraordinary species richness and endemism of the Indo-Australian Archipelago (IAA) exists in one of the most geologically dynamic regions of the planet. The provenance of its biota has been debated, particularly in the area known as Wallacea. Application of molecular genetic approaches and a better understanding of the region's complex geology have stimulated much recent biogeographic work in the IAA. We review molecular phylogenetic and phylogeographic studies in light of current geological evidence. Present distribution patterns of species have been shaped largely by pre-Pleistocene dispersal and vicariance events, whereas more recent changes in the connectivity of islands within the Archipelago have influenced the partitioning of intraspecific variation. Many genetic studies have uncovered cryptic species with restricted distributions. We discuss the conservation significance of the region and highlight the need for cross-taxon comparative studies using newly developed analytical approaches well suited to the challenges of historical inference in this region.
Publisher: Geological Society of London
Date: 17-04-2018
DOI: 10.1144/SP478.8
Publisher: American Geophysical Union (AGU)
Date: 17-09-2011
DOI: 10.1029/2011JB008379
Publisher: Elsevier BV
Date: 05-2017
Publisher: Elsevier BV
Date: 11-2017
Publisher: Elsevier BV
Date: 2017
Publisher: American Geophysical Union (AGU)
Date: 02-2021
DOI: 10.1029/2020TC006630
Publisher: IOP Publishing
Date: 20-08-2018
Publisher: Elsevier BV
Date: 11-2014
Publisher: Elsevier BV
Date: 02-2010
Publisher: The Royal Society
Date: 11-04-2018
Abstract: The high degree of endemism on Sulawesi has previously been suggested to have vicariant origins, dating back to 40 Ma. Recent studies, however, suggest that much of Sulawesi's fauna assembled over the last 15 Myr. Here, we test the hypothesis that more recent uplift of previously submerged portions of land on Sulawesi promoted ersification and that much of its faunal assemblage is much younger than the island itself. To do so, we combined palaeogeographical reconstructions with genetic and morphometric datasets derived from Sulawesi's three largest mammals: the babirusa, anoa and Sulawesi warty pig. Our results indicate that although these species most likely colonized the area that is now Sulawesi at different times (14 Ma to 2–3 Ma), they experienced an almost synchronous expansion from the central part of the island. Geological reconstructions indicate that this area was above sea level for most of the last 4 Myr, unlike most parts of the island. We conclude that emergence of land on Sulawesi (approx. 1–2 Myr) may have allowed species to expand synchronously. Altogether, our results indicate that the establishment of the highly endemic faunal assemblage on Sulawesi was driven by geological events over the last few million years.
Publisher: Oxford University Press (OUP)
Date: 27-02-2013
Abstract: Understanding factors driving ersity across bio ersity hotspots is critical for formulating conservation priorities in the face of ongoing and escalating environmental deterioration. While bio ersity hotspots encompass a small fraction of Earth's land surface, more than half the world's plants and two-thirds of terrestrial vertebrate species are endemic to these hotspots. Tropical Southeast (SE) Asia displays extraordinary species richness, encompassing four bio ersity hotspots, though disentangling multiple potential drivers of species richness is confounded by the region's dynamic geological and climatic history. Here, we use multilocus molecular genetic data from dense multispecies s ling of freshwater fishes across three bio ersity hotspots, to test the effect of Quaternary climate change and resulting drainage rearrangements on aquatic faunal ersification. While Cenozoic geological processes have clearly shaped evolutionary history in SE Asian halfbeak fishes, we show that paleo-drainage re-arrangements resulting from Quaternary climate change played a significant role in the spatiotemporal evolution of lowland aquatic taxa, and provide priorities for conservation efforts.
Publisher: American Geophysical Union (AGU)
Date: 2019
DOI: 10.1029/2018TC005177
Publisher: Wiley
Date: 21-06-2013
DOI: 10.1111/JBI.12166
Publisher: Elsevier BV
Date: 06-2011
Publisher: Elsevier BV
Date: 03-2023
Publisher: Geological Society of London
Date: 08-07-2214
DOI: 10.1144/JGS2011-130
Abstract: Thermochronological data from the Kinabalu granite, emplaced between c . 7.2 and 7.8 Ma, provide a unique record of northern Borneo’s exhumation during the Neogene. Biotite 40 Ar/ 39 Ar ages ( c . 7.32–7.63 Ma) record rapid cooling of the granite in the Late Miocene as it equilibrated with ambient crustal temperatures. Zircon fission-track ages ( c . 6.6–5.8 Ma) and apatite (U–Th–Sm)/He ages (central age c . 5.5 Ma) indicate rapid cooling during the Late Miocene–Early Pliocene. This cooling reflects exhumation of the granite, uplift and erosion bringing it closer to the Earth’s surface. Thermochronological age versus elevation relationships suggest exhumation rates of more than 7 mm a −1 during the latest Miocene and Early Pliocene. Neither the emplacement of the Kinabalu granite nor its exhumation is related to the Sabah orogeny, which terminated in the Early Miocene. Instead, granite magmatism was caused by extension related to subduction rollback of the Sulu Arc, and Mio-Pliocene exhumation of the Kinabalu granite was driven either by lithospheric delamination or break-off of a subducted slab beneath Sabah. Plio-Pleistocene tectonism offshore and onshore northern Borneo reflects continuing large-scale gravity-driven tectonics in the region. Full 40 Ar/ 39 Ar, fission-track and (U–Th–Sm)/He analytical data and 40 Ar/ 39 Ar age spectra plots can be found at www.geolsoc.org.uk/SUP18613 .
Publisher: Geological Society of America
Date: 04-2014
DOI: 10.1130/G35230.1
Publisher: Geological Society of London
Date: 2011
DOI: 10.1144/SP355.1
Publisher: Springer Science and Business Media LLC
Date: 19-06-2023
Publisher: Elsevier BV
Date: 10-2016
Publisher: Elsevier BV
Date: 08-2017
Publisher: Geological Society of America
Date: 2012
Publisher: Copernicus GmbH
Date: 24-09-2013
Abstract: Abstract. The island of Seram, which lies in the northern part of the 180°-curved Banda Arc, has previously been interpreted as a fold-and-thrust belt formed during arc-continent collision, which incorporates ophiolites intruded by granites thought to have been produced by anatexis within a metamorphic sole. However, new geological mapping and a re-examination of the field relations cause us to question this model. We instead propose that there is evidence for recent and rapid N–S extension that has caused the high-temperature exhumation of lherzolites beneath low-angle lithospheric detachment faults that induced high-temperature metamorphism and melting in overlying crustal rocks. These "Kobipoto Complex" migmatites include highly residual Al–Mg-rich garnet + cordierite + sillimanite + spinel + corundum granulites (exposed in the Kobipoto Mountains) which contain coexisting spinel + quartz, indicating that peak metamorphic temperatures likely approached 900 °C. Associated with these residual granulites are voluminous Mio-Pliocene granitic diatexites, or "cordierite granites", which crop out on Ambon, western Seram, and in the Kobipoto Mountains and incorporate abundant schlieren of spinel- and sillimanite-bearing residuum. Quaternary "ambonites" (cordierite + garnet dacites) emplaced on Ambon were also evidently sourced from the Kobipoto Complex migmatites as demonstrated by granulite-inherited xenoliths. Exhumation of the hot peridotites and granulite-facies Kobipoto Complex migmatites to shallower structural levels caused greenschist- to lower- hibolite facies metapelites and hibolites of the Tehoru Formation to be overprinted by sillimanite-grade metamorphism, migmatisation, and limited localised anatexis to form the Taunusa Complex. The extreme extension required to have driven Kobipoto Complex exhumation evidently occurred throughout Seram and along much of the northern Banda Arc. The lherzolites must have been juxtaposed against the crust at typical lithospheric mantle temperatures in order to account for such high-temperature metamorphism and therefore could not have been part of a cooled ophiolite. In central Seram, lenses of peridotites are incorporated with a major left-lateral strike-slip shear zone (the "Kawa Shear Zone"), demonstrating that strike-slip motions likely initiated shortly after the mantle had been partly exhumed by detachment faulting and that the main strike-slip faults may themselves be reactivated and steepened low-angle detachments. The geodynamic driver for mantle exhumation along the detachment faults and strike-slip faulting in central Seram is very likely the same we interpret the extreme extension to be the result of eastward slab rollback into the Banda Embayment as outlined by the latest plate reconstructions for Banda Arc evolution.
Publisher: Elsevier BV
Date: 04-2017
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Robert Hall.