Widespread misperception about a major East Asian biogeographic boundary exposed through bibliographic survey and biogeographic meta‐analysis

Komaki, Shohei

doi:10.1111/jbi.14210

Cited by 19 publications

(8 citation statements)

References 60 publications

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“…Herein, the biogeographical border of the Watase line, which has been described to exist between Kodakara Island and Akuseki Island (Yakushima Island and Amami Island in this study; Figure S1). Komaki (2021) indicated that the position of the border is ambiguous and proposed the question of whether a clear line exists. Since our primary objective was to investigate the impact of historical factors on land connections rather than to define a clear border, we opted to assume a boundary between Yakushima and the Amami Islands (Figure S1).…”

Section: Study Areamentioning

confidence: 99%

Scale‐dependent influences of environmental, historical, and spatial processes on taxonomic and functional beta diversity of Japanese bat assemblages

Maki,

Sannomiya,

Hirao

et al. 2024

Ecology and Evolution

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This study investigated the relative influences of environmental, spatial, and historical factors, including the island‐specific history of land connectivity, on bat assemblages in the Japanese Archipelago. We collected bat distribution data from 1408 studies and assigned them to Japan's First Standard Grid (approximately 6400 km2). Japanese bat assemblages were analyzed at two scales: the entire Japanese Archipelago comprised 16 islands and exclusively the four main islands. At first, we calculated taxonomic and functional total beta diversity (βtotal) by Jaccard pairwise dissimilarity and then divided this into turnover (βrepl) and richness‐difference (βrich) components. We conducted hierarchical clustering of taxonomic beta diversity to examine the influence of the two representative sea straits, Tsugaru and Tokara, which are considered biogeographical borders. Variation partitioning was conducted to evaluate the relative effects of the three factors on the beta diversity. Clustering revealed that the Tokara Strait bordered the two major clades; however, the Tsugaru Strait did not act as a biogeographical border for bats. In the variation partitioning, shared fraction between spatial and historical factors significantly explained taxonomic and functional βtotal and taxonomic βrepl at the entire archipelago scale, but not at the four main islands scale extending only Tsugaru Strait but not Tokara Strait. Pure environmental factors significantly explained functional βtotal at both scales and taxonomic βtotal only at the four main islands scale. These results suggest that spatial and historical factors are more pronounced in biogeographical borders, primarily structuring assemblage composition at the entire archipelago scale, especially in taxonomic dimension. However, current environmental factors primarily shape the assemblage composition of Japanese bats at the main island scale. The difference in results between the two scales highlights that the primary processes governing assemblages of both dimensions depend on the quality of the dispersal barriers between terrestrial and aquatic barriers for bats.

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Section: Study Areamentioning

confidence: 99%

Scale‐dependent influences of environmental, historical, and spatial processes on taxonomic and functional beta diversity of Japanese bat assemblages

Maki,

Sannomiya,

Hirao

et al. 2024

Ecology and Evolution

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“…Adherence to this polarized argument (e.g., Heads, 2005) may hinder progress toward considering and understanding the importance of many other factors (De Queiroz, 2014) such as long‐distance dispersal (Welt & Raxworthy, 2022) and the role of ecological adaptation (Zhou et al., 2020), which often contribute to unique floral and faunal assemblages of celebrated island communities (Gillespie, 2002; Lomolino et al., 2017; Wagner & Funk, 1995; Wallace, 1869). In East Asia, the Ryukyu Island Chain had been studied extensively, as a fertile region to test the relative influence and impact of geohistorical events, deep‐sea barriers, and sea currents in shaping this archipelago's highly endemic, insular biota (Kawamura et al., 2016; Komaki, 2021; Yang et al., 2018). However, ecological factors such as host‐specificity, adaptation to local environments, and interspecific competition have been rarely considered (but see Sato et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

A shift in the host web occupancy of dew‐drop spiders associated with genetic divergence in the Southwest Pacific

Elias,

Responte,

et al. 2024

Journal of Biogeography

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AimWe assessed the population genetic structure of the kleptoparasitic spider Argyrodes bonadea across the Southwestern Pacific islands. Our aim is to evaluate the impact of overseas distances and, in particular, the Kerama gap, as potential drivers of genetic differentiation. If no relationship exists, then we assume dispersal following adaptive change as alternative non‐vicariant mechanism that generates divergence.LocationSouthwestern Pacific Islands.Taxon Argyrodes bonadea. MethodsWe used mitochondrial Cytochrome Oxidase 1 (CO1) gene sequences and Restriction Site‐associated DNA Sequencing (RAD‐seq) for our analyses.ResultsTwo strongly supported lineages, an Amami‐Okinawa Lineage (AOL) and an Austral‐Asia Lineage (AAL), correspond to two separate clades, roughly divided by the Kerama Gap, in phylogenetic trees estimated here. However, species delimitation led to the interpretation of only a single species present. The AOL exhibits complex, geographically structured host web spider species specificity, wherein the Amami population utilizes Cyrtophora, but AOL samples in Okinawa associate exclusively with Nephila—and yet all broadly distributed AAL populations show no evidence of host web spider species specificity.Main ConclusionThe population boundary between AOL and AAL likely results from local adaptation to novel hosts—instead of isolation by the Kerama Gap—following long‐distance dispersal and range expansion. Our results suggest kleptoparasitic spiders have the capacity to overcome permanent deep‐sea barriers and colonize distant landmasses. Whereas peripheral populations (AOL) demonstrate the capacity for specialization to a single host, which may have contributed to genetic differentiation and isolation, the broadly distributed AAL persists and has successfully expanded its geographical range as a host generalist, which may contribute to ongoing gene flow inferred in this study.

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“…Combined with knowledge of phylogeny and ecological traits, the distribution data could contribute to identification of biodiversity hotspots and assessment of conservation prioritisation ( Loiseau et al 2020 , Jetz et al 2014 , Benedetti et al 2022 ). Macroecology and biogeography also require large-scale distribution data to explain spatial patterns of diversity ( Davies et al 2007 , Lennon et al 2001 , Komaki 2021 ). The impact of global climate change on birds has caused widespread discussion and much of this evidence is based on the knowledge of range shifts ( Gillings et al 2015 , Hitch and Leberg 2007 , Huntley et al 2006 ).…”

Section: Introductionmentioning

confidence: 99%

A dataset of bird distributions in zoogeographical regions of China

Han¹,

Xia²,

Møller³

2022

BDJ

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China, the largest country in Asia, has a land area of approximately 9.6 million square kilometres. There are 1481 bird species (following the taxonomy of IOC World Bird List version 12.1) recorded in two zoogeographical realms, seven regions and 19 subregions in the country. From 1955 to 2017, six authoritative monographs were published, which recorded the distribution area for all bird species in China and were widely quoted by research papers and field guides. This massive amount of data could be used to address many hot topics in ornithology, biogeography and ecology. However, rapid changes in the taxonomic status and different schemes of zoogeographical regionalisation in these six monographs provided limits to the utilisation of these valuable data. By integrating the data from the six monographs, we presented an open-access dataset on the occurrences and residence types of all Chinese bird species in zoogeographical regions over the past 60 years. The taxonomic statuses for these species were determined following the IOC World Bird List version 12.1 and the zoogeographical regions were based on the updated scheme. These data provide valuable information for the research in bird ecology and conservation biology.

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Widespread misperception about a major East Asian biogeographic boundary exposed through bibliographic survey and biogeographic meta‐analysis

Cited by 19 publications

References 60 publications

Scale‐dependent influences of environmental, historical, and spatial processes on taxonomic and functional beta diversity of Japanese bat assemblages

Scale‐dependent influences of environmental, historical, and spatial processes on taxonomic and functional beta diversity of Japanese bat assemblages

A shift in the host web occupancy of dew‐drop spiders associated with genetic divergence in the Southwest Pacific

A dataset of bird distributions in zoogeographical regions of China

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