A 22,000-year tephrostratigraphy record of unidentified volcanic eruptions from Ternate and Tidore islands (North Maluku, Indonesia)

Faral, Audrey; Lavigne, Franck; Mutaqin, Bachtiar Wahyu; Mokadem, Fatima; Achmad, Rahim; Ningrum, Rohima Wahyu; Lahitte, Pierre; Hadmoko, Danang Sri; Mei, Estuning Tyas Wulan

doi:10.1016/j.jvolgeores.2022.107474

Cited by 5 publications

(2 citation statements)

References 48 publications

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“…Species migration from South to North probably happened through animal or sea dispersal. Since the emergence of Moluccas islands in the Oligocene / Miocene and even during glacial maximas, no major land bridges have connected North and South Moluccas, even during the glacial maxima when the sea level was around 120 m lower than now (Faral et al, 2022;Hall, 1987;Hall & Wilson, 2000), which supports observed differences between the general flora of the North and South Moluccas (Rutgrink et al, 2018). The origin of the Asian genera Myristicahas been dated around the Late Miocene based on plastid data (Doyle et al, 2004;Frost et al, 2022;Sauquet et al, 2003), at a time when both North and South Moluccas were already present.…”

Section: Discussionmentioning

confidence: 99%

Retracing the center of origin and evolutionary history of nutmeg Myristica fragrans, an emblematic spice tree species

Kusuma¹,

Scarcelli²,

Navascués

et al. 2023

Preprint

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The identification of cultivated plant centers of origin is of growing interest since the pioneering work of Nikolaï Vavilov. Cultivated species generally show a high level of genetic diversity in their center of origin, thus identifying these areas would have important implications for the conservation and sustainable management of their genetic resources. We aim to identify the center of origin and to infer recent evolutionary history of one of the most emblematic spice tree species ¬¬– nutmeg (Myristica fragrans; Myristicaceae). The species is thought to originate from the Banda islands (Southern Moluccas archipelago, Indonesia), but this has never been confirmed. We characterized the genetic diversity of this species across the Moluccas archipelago using recently developed nuclear microsatellites markers and whole plastid genome sequences. We found two main intra-specific genetic clusters: one in South Moluccas (Banda and Ambon islands) and another in North Moluccas (Ternate, Tidore and Bacan islands). The latter cluster showed higher genetic diversity than the South Moluccas cluster. We then inferred the demographic history of nutmeg and evaluated different evolutionary scenarios using Approximate Bayesian Computation (ABC) analyses. Populations from South Moluccas show patterns of a recent bottleneck, whereas North Molucca populations did not. Moreover, South Moluccas populations are inferred as ancestral, with subsequent population migration to the North Moluccas during the late Pleistocene to early Holocene period. These results have strong implications for conservation strategies of nutmeg.

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Section: Discussionmentioning

confidence: 99%

Retracing the center of origin and evolutionary history of nutmeg Myristica fragrans, an emblematic spice tree species

Kusuma¹,

Scarcelli²,

Navascués

et al. 2023

Preprint

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“…Indonesia is situated in an active subduction zone between three plates: Eurasia, Indo-Australia, and Pacific plates (Figure 1a), with an estimated subduction rate of 7-9 cm/year (Brehme et al, 2014;Marliyani et al, 2020). Such active subduction activity forms major trenches, such as the Java, Timor, Sangihe, and Halmahera Trenches (Gertisser et al, 2012, Faral et al, 2022. The Java Trench has been active since the Early Cenozoic (Hall 2002, Smyth et al, 2011, forming subduction-related magmatism-volcanism as indicated by subalkaline magma affinities (Setidjadji et al, 2006; see their Fig.…”

Section: Geological Backgroundmentioning

confidence: 99%

Cooling history (from magma ascent to lava extrusion) of the Watuadeg pillow lava, Berbah, Yogyakarta, Indonesia

Suhendro,

Harijoko,

Setiawan

et al. 2023

J. Appl. Geol.

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The Watuadeg pillow lava (WPL) is known as one of the most famous pillow lava outcrops in Yogyakarta, Indonesia, and its origin has been attributed to rapid-cooling process of subaqueous lava extrusion. However, there is no quantitative evidence that implies such hypotheses. Therefore, this study aims to reduce such a gap by revealing the cooling times (t) of WPL on the basis of a quantitative approach. In particular, we measured the size distribution (CSD) and number density (MND) of plagioclase microlites from the core, medial, and marginal (rim) domains of WPL. We found that the CSD slope significantly increases towards marginal zones, namely 30.4ᵒ for the core, 53.4ᵒ for the medial, and 228.1ᵒ for the rim. Because CSD slope is inversely proportional to cooling time ( ), by assuming a typical plagioclase microlite growth rate (G) of 1×107 mm/s, it is therefore inferred that the rim experienced the fastest cooling time (±12.1 hours), followed by the medial and core ((±52.0 and 91.4 hours, respectively). The fact that MNDs value increases toward the marginal zones also does not deny this idea (0.3×1016 m-3 for the core, 1.4×1016 m-3 for the medial, and 2.4×1016 m-3 for the rim), as higher MND with the domination of acicular-spherulitic habit represents a higher degree of undercooling. Because microlite is syn-eruptive product, our estimation represents the cooling time of magma since it migrated from the reservoir to the surface.

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Volcanic hazard knowledge and preparedness of small island community on the flank of Gamalama volcano Ternate Island–Indonesia

et al. 2022

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A 22,000-year tephrostratigraphy record of unidentified volcanic eruptions from Ternate and Tidore islands (North Maluku, Indonesia)

Cited by 5 publications

References 48 publications

Retracing the center of origin and evolutionary history of nutmeg Myristica fragrans, an emblematic spice tree species

Retracing the center of origin and evolutionary history of nutmeg Myristica fragrans, an emblematic spice tree species

Cooling history (from magma ascent to lava extrusion) of the Watuadeg pillow lava, Berbah, Yogyakarta, Indonesia

Volcanic hazard knowledge and preparedness of small island community on the flank of Gamalama volcano Ternate Island–Indonesia

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