Phylogeography of the northernmost distributed <i>Anisocentropus</i> caddisflies and their comparative genetic structures based on habitat preferences

Takenaka, Masaki; Shibata, Saki; Ito, Tomiko; Shimura, Noriyoshi; Tojo, Koji

doi:10.1002/ece3.7419

Cited by 9 publications

(3 citation statements)

References 73 publications

(113 reference statements)

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“…These results apparently contradict the habitat stability hypothesis which states that organisms inhabiting lentic waters have high dispersal capacity and low genetic structure (Ribera & Vogler, 2000; Ribera, 2008). Several studies revealed that barriers to migration and habitat stability in long-term, historical, and geological backgrounds and rather than water flow strongly affects genetic differentiation in aquatic insects (Letsch, Gottsberger & Ware, 2016; Saito & Tojo, 2016; Tojo et al, 2017; Takenaka et al, 2021). Genetic differentiation of the Lake Biwa E. ramicornis group could also be explained without the habitat stability hypothesis.…”

Section: Discussionmentioning

confidence: 99%

“…It was proposed that physical water flow alone does not influence population genetic structure or differentiation. The latter might also be affected by migration barriers and habitat characteristics such as stability and persistence in long-term, historical, and geological backgrounds (Letsch, Gottsberger & Ware, 2016; Saito & Tojo, 2016; Tojo et al, 2017; Takenaka et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Genetic differentiation of water penny beetles may be associated with the formation process of the ancient Lake Biwa

Kondo

Nishino

Uenishi

et al. 2022

Preprint

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Background: Water flow is one of several factors that determine the habitats of aquatic insects. The conversions of stagnant (lentic) and running (lotic) water are physiologically and ecologically constrained. In general, aquatic insect species only occur in one of these environments. Though Eubrianax ramicornis (Coleoptera: Psephenidae) usually resides in rivers, however, it is also known to occur near the shores of Lake Biwa in Japan. Here, we investigated the genetic differences between the two Eubrianax species of Lake Biwa and its inflowing rivers, and other regions of Japan for the first time. Lake Biwa is an ancient lake and about four million years old. Though over 60 endemic species were described from Lake Biwa, they are mostly fish and molluscs, with only two species of aquatic insects. There are few reports of endemic aquatic insects in other ancient lakes, too. Discussion of the endemism of Eubrianax and its promoting factors is expected to provide insights into the evolution of aquatic insects in ancient lakes. Methods: We surveyed and morphologically identified psephenid larvae in Lake Biwa and its inflowing rivers during the summers of 2017 and 2018 (Hayashi, 2009: Hayashi & Sota, 2009). We conducted phylogenetic analyses of two regions of COI and estimated the ages of population divergence based on fossil records of Eubrianax beetles in Lake Biwa as well as those of previously reported populations in other regions. We also analyzed two COI regions of the E. ramicornis haplotypes in Lake Biwa. Results: Four psephenid species were identified among the samples collected in Lake Biwa and its inflowing rivers. Of these, E. ramicornis was collected only at the Lake Biwa shore whereas its congeneric E. granicollis was collected only from the rivers inflowing the lake. The phylogenetic analyses showed that E. ramicornis of Lake Biwa were clearly differentiated from those in previously reported regions and this divergence was estimated to have occurred 1.40 MYA. At that time, there was no lake at the location of present-day Lake Biwa. It is thought that rivers and their dammed flood plains to the east, with gravel and sand supplied by the rising Suzuka Mountains further to the east. Such an environments is preferable for E. ramicornis and they were thought to have become isolated from the surrounding rivers during the formation of Lake Biwa. On the contrary, there was no genetic differentiation between the E. granicollis population at the Lake Biwa inflow rivers and those elsewhere. Hence, E. granicollis might have migrated to the Lake Biwa watershed later than E. ramicornis and maintained gene flow over a wide area. The genetic differentiation of E. ramicornis reported here for the first time suggests that a species with a wide distribution may rather be evolving endemic to Lake Biwa. Reports on the endemism of aquatic insects in ancient lakes are scarce. This study is expected to bring new perspectives to the study of insect evolution in ancient lakes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic differentiation of water penny beetles may be associated with the formation process of the ancient Lake Biwa

Kondo

Nishino

Uenishi

et al. 2022

Preprint

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“…“Niche differentiation” is one of the important factors that creates biodiversity (Leibold & McPeek, 2006 ; Takenaka et al, 2021 ; Tilman, 2000 ). The finer the niche differentiation that occurs on the microhabitat scale, the greater the degree of biodiversity within the area (Kovalenko et al, 2012 ; Maltseva et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Seasonal modifications of longitudinal distribution patterns within a stream: Interspecific interactions in the niche overlap zones of two Ephemera mayflies

Okamoto

Takenaka

Tojo

2022

Ecology and Evolution

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Niche differentiation between closely related species leads to differentiation of their habitats. Segregation based on slight differences in environmental factors, that is niche differentiation on the microhabitat scale, allows more species to inhabit a certain geographic space. Therefore, such fine scale niche differentiation is an important factor in the support of species diversity. In addition, niche differentiation on the microhabitat scale and/or the differentiation of breeding seasons can be considered typical mechanisms that facilitate multispecies’ co‐existence. In this study, sister species (Commonly, Ephemera japonica inhabit at upstream region and Ephemera strigata inhabit at middle stream region), which often coexist in the upper to middle reaches of river systems of the Japanese Islands, were targeted and the following aspects were investigated. First, differences in habitat preference and interspecific differences in flow distribution patterns on a geographically fine scale were tracked in detail. Subsequently, the temporal transitions of their distribution patterns were investigated in detail and seasonal changes were investigated. Finally, we thoroughly investigated the disappearance of nymphs of each species from the river due to emergence affected the distribution of each species (by conducting daily emergence surveys). Combining results of these multiple studies also suggested that there may be spatiotemporal interspecial interaction between these two species within/around their overlapping regions. Traditionally, the longitudinal distribution pattern of these two Ephemera mayflies has been thought to be established based on a difference in habitat preferences, but this study revealed that the interspecific interaction between the two species also plays an important role. This study provides new insights into species diversity and distribution pattern formation in river‐dwelling species.

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Geographical fine-scaled distributional differentiation caused by niche differentiation in three closely related mayflies

2021

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Phylogeography of the northernmost distributed Anisocentropus caddisflies and their comparative genetic structures based on habitat preferences

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 9 publications

References 73 publications

Genetic differentiation of water penny beetles may be associated with the formation process of the ancient Lake Biwa

Genetic differentiation of water penny beetles may be associated with the formation process of the ancient Lake Biwa

Seasonal modifications of longitudinal distribution patterns within a stream: Interspecific interactions in the niche overlap zones of two Ephemera mayflies

Geographical fine-scaled distributional differentiation caused by niche differentiation in three closely related mayflies

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