Targeted eDNA Metabarcoding Reveals New Populations of a Range‐Limited Stonefly

Ecology and Evolution, Год журнала: 2025, Номер 15(4)

Опубликована: Апрель 1, 2025

ABSTRACT Understanding the geographic distributions of rare species can be crucial for conservation management. New environmental DNA (eDNA) technologies offer potential to efficiently document endangered species, but date, such screening has focused largely on vertebrate taxa. Here we use freshwater eDNA assess distribution Maungatua stonefly, Zelandoperla maungatuaensis , a flightless insect previously known from only handful streams draining 4‐km section mountain range in southern Zealand. We analyzed 12 stream localities across range. Screening with commercial COI primers failed detect focal Z. . However, newly designed species‐specific detected this taxon four adjacent east‐flowing contain and two which it had not been detected. Subsequent manual surveys confirmed presence discovered populations, barcoding revealing that they together represent unknown, genetically divergent subclade. Our results illustrate metabarcoding help delineate ranges taxa, highlight importance primer specificity when These findings also have considerable implications companies offering biodiversity health services targeting invertebrates.

Язык: Английский

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Cave records reveal recent origin of North America’s deepest canyon

Proceedings of the National Academy of Sciences, Год журнала: 2025, Номер 122(21)

Опубликована: Май 19, 2025

We explore how and when Hells Canyon, North America’s deepest river gorge (~2,400 m deep), formed, addressing these fundamental questions first posed by W. Lindgren [ The Gold Belt of the Blue Mountains Oregon (1901)]. Existing hypotheses about canyon’s formation timing incision remain speculative due to a lack direct constraints geomorphic analysis in canyon. Herein, we combine cosmogenic nuclide dating cave-bound deposits, profile analysis, numerical modeling provide age systematic processes at work Canyon. Our study reveals significant drainage capture triggered rapid ~2.1 ± 1.0 Ma, establishing Snake River’s modern route into Columbia River system. increased area subsequent increase stream power resulted Canyon tributary knickpoints (KPs) that decrease elevation away from location. Cosmogenic cave deposits indicates rates ~0.01 ~0.16 mm y −1 . Numerical supports observations, demonstrating abrupt drives incision. findings well-constrained example can dramatically shape evolution major gorge.

Язык: Английский

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The functional traits behind fish rarity in an impounded river basin

Reviews in Fish Biology and Fisheries, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

Язык: Английский

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Opportunity Begets Opportunity to Drive Macroevolutionary Dynamics of a Diverse Lizard Radiation

Опубликована: Янв. 18, 2024

Evolution proceeds unevenly across the tree of life, with some lineages accumulating diversity more rapidly than others. Explaining this disparity is challenging as similar evolutionary triggers often do not result in analogous shifts tree, and may reflect different triggers. We used a combination approaches to directly consider such context-dependency untangle complex network processes that shape macroevolutionary dynamics, focusing on Pleurodonta, diverse radiation lizards. Our framework shows lineage-wide signatures are lost when conditioned sub-lineages: viviparity appears accelerate diversification but its effect size overestimated by association Andean mountains. Conversely, signals erode at broader phylogenetic scales emerge shallower ones. Mountains general affect speciation rates; rather, occurrence mountains specifically promotes diversification. Likewise, evolution larger sizes catalyzes rates, only within certain ecological geographical settings. caution conventional methods fitting models entire trees mistakenly assign heterogeneity specific factors despite evidence against their plausibility. study takes significant stride toward disentangling confounding identifying plausible sources opportunities large radiations.

Язык: Английский

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Opportunity begets opportunity to drive macroevolutionary dynamics of a diverse lizard radiation

Evolution Letters, Год журнала: 2024, Номер 8(5), С. 623 - 637

Опубликована: Июнь 3, 2024

Evolution proceeds unevenly across the tree of life, with some lineages accumulating diversity more rapidly than others. Explaining this disparity is challenging as similar evolutionary triggers often do not result in analogous shifts tree, and may reflect different triggers. We used a combination approaches to directly consider such context-dependency untangle complex network processes that shape macroevolutionary dynamics, focusing on Pleurodonta, diverse radiation lizards. Our approach shows lineage-wide signatures are lost when conditioned sublineages: while viviparity appears accelerate diversification, its effect size overestimated by association Andean mountains. Conversely, signals erode at broader phylogenetic scales emerge shallower ones. Mountains, general, affect speciation rates; rather, occurrence mountains specifically promotes diversification. Likewise, evolution larger sizes catalyzes diversification rates, but only within certain ecological geographical settings. caution conventional methods fitting models entire trees mistakenly assign heterogeneity specific factors despite evidence against their plausibility. study takes significant stride toward disentangling confounding identifying plausible sources opportunities large radiations.

Язык: Английский

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River Drainage Reorganization and Reticulate Evolution in the Two-Lined Salamander (Eurycea bislineata) Species Complex

Systematic Biology, Год журнала: 2023, Номер 73(1), С. 26 - 35

Опубликована: Окт. 16, 2023

Abstract The origin and eventual loss of biogeographic barriers can create alternating periods allopatry secondary contact, facilitating gene flow among distinct metapopulations generating reticulate evolutionary histories that are not adequately described by a bifurcating tree. One such example may exist in the two-lined salamander (Eurycea bislineata) species complex, where discordance morphological molecular datasets has created “vexing taxonomic challenge.” Previous phylogeographic analyses mitochondrial DNA (mtDNA) suggested reorganization Miocene paleodrainages drove vicariance dispersal, but inherent limitations single-locus dataset precluded evaluation subsequent flow. Here, we generate triple-enzyme restriction site-associated sequencing (3RAD) data for > 100 individuals representing all major mtDNA lineages use suite complementary methods to demonstrate earlier is best explained history influenced river drainage reorganization. Systematics groups should acknowledge these complex relationships strictly hierarchical. [Amphibian; hybridization; introgression; Plethodontidae; stream capture.]

Язык: Английский

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Pleistocene Landscape Dynamics Drives Lineage Divergence of a Temperate Freshwater Fish Gobio rivuloides in Coastal Drainages of Northern China

Genes, Год журнала: 2023, Номер 14(12), С. 2146 - 2146

Опубликована: Ноя. 27, 2023

Understanding historical processes underlying lineage distribution patterns is a primary goal of phylogeography. We selected Gobio rivuloides (Cypriniformes: Gobionidae) as model to improve our knowledge about how intraspecific genetic divergence freshwater fishes arises in coastal drainages northern China via statistical analysis using cytochrome b gene. The time-calibrated phylogeny G. showed the two major lineages (I and II) at ~0.98 Ma (million years ago). Lineage I can be divided into sub-lineages (I-A I-B) with time ~0.83 Ma. Sub-lineage I-A inhabits Amur River, sub-lineage I-B lives Luan River Liao River. II distributed Yellow Hai close relationships between drainages, split (II-C II-D) ~0.60 Our findings indicate that splitting could attributed geographic isolation caused by formation Bohai Sea, river capture, episodic hydrologic closing paleolake during late Lower-Middle Pleistocene. It also first report we know displaying clear phylogeographic break for across China.

Язык: Английский

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Comment on egusphere-2023-2651

Опубликована: Март 14, 2024

Abstract. Fluvial drainage patterns in orogenic belts reflect the interaction between tectonics, climate, and lithology. The central South Tian Shan displays a complex fluvial pattern that shifts from longitudinal (flowing parallel to mountain ranges) west transverse across east. Whether such underlying of tectonic deformation, lithology, climatic changes, or influence surface processes within basin is often unclear. We focus here on anomalously large Saryjaz catchment SE Kyrgyzstan, which marks transition drainage. analyse topographic metrics including slope, river steepness (k_sn) integral proxy χ along profile, map spatial distribution characteristics knickpoints discern possible controls observed pattern. discriminate different origin: tectonic, lithologic, glacial, those linked transient waves incision. find series tributaries downstream sharp 180ᵒ bend main stem River, also striking increase channel steepness. Both observations indicate accelerated incision this lower reach catchment. Knickpoint elevations decrease downstream, whereas depth, values (measured tributary junctions) k_sn ratios are constant among tributaries. These results suggest driven “top-down” by large-magnitude river-capture event rather than “bottom-up” base-level fall. estimate an erodibility parameter ¹⁰Be derived catchment-average denudation rates use celerity knickpoints. started retreating at similar time, ca. 1.5 4.4 Myr ago. Considering timing constraints, we capture was likely overfill Neogene intermontane basins, potentially affected both climate factors.

Язык: Английский

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Comment on egusphere-2023-2651

Опубликована: Март 21, 2024

Abstract. Fluvial drainage patterns in orogenic belts reflect the interaction between tectonics, climate, and lithology. The central South Tian Shan displays a complex fluvial pattern that shifts from longitudinal (flowing parallel to mountain ranges) west transverse across east. Whether such underlying of tectonic deformation, lithology, climatic changes, or influence surface processes within basin is often unclear. We focus here on anomalously large Saryjaz catchment SE Kyrgyzstan, which marks transition drainage. analyse topographic metrics including slope, river steepness (k_sn) integral proxy χ along profile, map spatial distribution characteristics knickpoints discern possible controls observed pattern. discriminate different origin: tectonic, lithologic, glacial, those linked transient waves incision. find series tributaries downstream sharp 180ᵒ bend main stem River, also striking increase channel steepness. Both observations indicate accelerated incision this lower reach catchment. Knickpoint elevations decrease downstream, whereas depth, values (measured tributary junctions) k_sn ratios are constant among tributaries. These results suggest driven “top-down” by large-magnitude river-capture event rather than “bottom-up” base-level fall. estimate an erodibility parameter ¹⁰Be derived catchment-average denudation rates use celerity knickpoints. started retreating at similar time, ca. 1.5 4.4 Myr ago. Considering timing constraints, we capture was likely overfill Neogene intermontane basins, potentially affected both climate factors.

Язык: Английский

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Reply on RC1

Опубликована: Май 8, 2024

Abstract. Fluvial drainage patterns in orogenic belts reflect the interaction between tectonics, climate, and lithology. The central South Tian Shan displays a complex fluvial pattern that shifts from longitudinal (flowing parallel to mountain ranges) west transverse across east. Whether such underlying of tectonic deformation, lithology, climatic changes, or influence surface processes within basin is often unclear. We focus here on anomalously large Saryjaz catchment SE Kyrgyzstan, which marks transition drainage. analyse topographic metrics including slope, river steepness (k_sn) integral proxy χ along profile, map spatial distribution characteristics knickpoints discern possible controls observed pattern. discriminate different origin: tectonic, lithologic, glacial, those linked transient waves incision. find series tributaries downstream sharp 180ᵒ bend main stem River, also striking increase channel steepness. Both observations indicate accelerated incision this lower reach catchment. Knickpoint elevations decrease downstream, whereas depth, values (measured tributary junctions) k_sn ratios are constant among tributaries. These results suggest driven “top-down” by large-magnitude river-capture event rather than “bottom-up” base-level fall. estimate an erodibility parameter ¹⁰Be derived catchment-average denudation rates use celerity knickpoints. started retreating at similar time, ca. 1.5 4.4 Myr ago. Considering timing constraints, we capture was likely overfill Neogene intermontane basins, potentially affected both climate factors.

Язык: Английский

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