Adaptation in a keystone grazer under novel predation pressure

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 292(2039)

Published: Jan. 1, 2025

Understanding how species adapt to environmental change is necessary protect biodiversity and ecosystem services. Growing evidence suggests can rapidly novel selection pressures like predation from invasive species, but the repeatability predictability of remain poorly understood in wild populations. We tested a keystone aquatic herbivore, Daphnia pulicaria, evolved response pressure by introduced zooplanktivore Bythotrephes longimanus. Using high-resolution 210Pb-dated sediment cores 12 lakes Ontario (Canada), which primarily differed invasion status Bythotrephes, we compared population genetic structure over time using whole-genome sequencing individual resting embryos. found strong differentiation between populations approximately 70 years before versus 30 after reported invasion, with no difference this period uninvaded lakes. Compared lakes, identified, on average, 64 times more loci were putatively under invaded Differentiated mainly associated known reproductive stress responses, mean body size consistently increased 14.1% These results suggest repeatedly acquiring heritable adaptations escape gape-limited predation. More generally, our some aspects predictably shape genome evolution.

Language: Английский

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Why eDNA fractions need consideration in biomonitoring

Molecular Ecology Resources, Journal Year: 2022, Volume and Issue: 22(7), P. 2458 - 2470

Published: June 2, 2022

Abstract The analysis of environmental DNA (eDNA) is revolutionizing the monitoring biodiversity as it allows to assess organismic diversity at large scale and unprecedented taxonomic detail. However, eDNA consists an extracellular intracellular fraction, each characterized by particular properties that determine retrievable information on when where organisms live or have been living. Here, we review fractions eDNA, describe how obtain them from samples present a four‐scenario concept aims enhancing spatial temporal resolution eDNA‐based monitoring. Importantly, highlight appropriate choice precludes misinterpretation data. Finally, future avenues research towards fraction‐specific analyses are outlined unravel full potential studies targeting micro‐ macro‐organisms.

Language: Английский

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The Application of eDNA for Monitoring Aquatic Non-Indigenous Species: Practical and Policy Considerations

Diversity, Journal Year: 2023, Volume and Issue: 15(5), P. 631 - 631

Published: May 6, 2023

Aquatic non-indigenous species (NIS) threaten biodiversity, ecosystem functions, and the economy worldwide. Monitoring NIS is of immediate concern to identify newly arriving species, assess efficacy mitigation measures, report long-term indicators introduction, spread, impacts. The challenges associated with conventional methods specimen collection morphological identification have led development alternative methods, such as DNA-based which could offer rapid cost-effective detection NIS. Depending on whether a few (targeted monitoring) or many (passive are being monitored, environmental DNA (eDNA) can infer presence-absence relative abundances, enabling informed decisions actions be made based patterns detection. Compared more eDNA tools increase levels sensitivity for rare elusive even noticeable some taxa when using targeted monitoring. use not only minimizes onus taxonomic expertise reduces resource demands but also sensitive cost-efficient in detecting NIS, thus proving its value an early warning tool. As nucleic acid (DNA/RNA) advance rapidly detection, there must balance between method sensitivity, logistical requirements, costs, factored into future management decisions. While complementary reviews available, our aim emphasize importance incorporating surveys highlight available opportunities this field.

Language: Английский

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Millennial-scale variations in Arctic sea ice are recorded in sedimentary ancient DNA of the microalga Polarella glacialis

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: Jan. 9, 2024

Abstract Sea ice is a critical component of the Earth’s Climate System and unique habitat. Sea-ice changes prior to satellite era are poorly documented, proxy methods needed constrain its past variability. Here, we demonstrate potential sedimentary DNA from Polarella glacialis , sea-ice microalga, for tracing conditions. We quantified P. (targeting nuclear ribosomal ITS1 region) in Arctic marine fjord surface sediments sediment core northern Baffin Bay spanning 12,000 years. trap samples confirmed that cysts common first-year sea sinking particulate matter following melt. Its detection more efficient with our molecular approach than standard micropaleontological methods. Given species inhabits coastal environments Antarctic, has become useful tool circum-polar reconstructions.

Language: Английский

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Extracellular DNA in Environmental Samples: Occurrence, Extraction, Quantification, and Impact on Microbial Biodiversity Assessment

Applied and Environmental Microbiology, Journal Year: 2021, Volume and Issue: 88(3)

Published: Nov. 24, 2021

Environmental DNA, i.e., DNA extracted directly from environmental samples, has been applied to understand microbial communities in the environment and monitor contemporary biodiversity conservation context. often contains both intracellular (iDNA) extracellular (eDNA). eDNA can persist complicate sequencing-based analyses of biodiversity.

Language: Английский

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Epigenetic variation in animal populations: Sources, extent, phenotypic implications, and ecological and evolutionary relevance

Journal of Biosciences, Journal Year: 2021, Volume and Issue: 46(1)

Published: March 4, 2021

Language: Английский

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Sedimentary ancient DNA: a new paleogenomic tool for reconstructing the history of marine ecosystems

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: June 9, 2023

Sedimentary ancient DNA ( seda DNA) offers a novel retrospective approach to reconstructing the history of marine ecosystems over geological timescales. Until now, biological proxies used reconstruct paleoceanographic and paleoecological conditions were limited organisms whose remains are preserved in fossil record. The development analysis techniques substantially expands range studied taxa, providing holistic overview past biodiversity. Future research is expected dramatically improve our understanding how biota responded changing environmental conditions. However, as an emerging approach, holds many challenges, its ability recover reliable biodiversity information needs be carefully assessed. This review aims highlight current advances discuss potential methodological pitfalls limitations.

Language: Английский

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Non-Indigenous Cladocera (Crustacea: Branchiopoda): From a Few Notorious Cases to a Potential Global Faunal Mixing in Aquatic Ecosystems

Water, Journal Year: 2022, Volume and Issue: 14(18), P. 2806 - 2806

Published: Sept. 9, 2022

Non-indigenous species may pose a threat to native ecosystems worldwide. In aquatic environments, invasives have negative impact on human food security and livelihoods. Several water fleas (Crustacea: Branchiopoda: Cladocera) are notorious invasive alien influencing large freshwater lake systems even inland seas. the current review, we discuss state of knowledge regarding non-indigenous in Cladocera their invasiveness potential different continents. We argue that impacts occurrence cladoceran exotics be higher than generally assumed. critically review 79 cases from literature sources, involving 61 taxa where records outside natural distribution ranges were previously interpreted as invasions. assessed probability range expansions versus human-mediated introductions several major corridors invasion. estimate transportations for at least 43 (out 61; ca 70%), while other can seen (not necessarily/not likely human-mediated) and/or taxonomical confusion. confirm presence recipient regions 41 taxa, which true (i.e., with ecosystems). The majority zooplankters effects pelagic ecosystems, yet also report by littoral taxa. cryptic cladocerans taking place global scale, they remain under radar. highlight striking case studies, such Ponto–Caspian onychopods invaded Baltic Sea Laurentian Great Lakes, clones anomopod genera Daphnia Bosmina successfully colonised new causing equilibria shifts worlds. At same time, dispel some myths about misconstrued certain localities. Based our first its kind zooplankton, future environmental monitoring tools including molecular techniques detailed surveys rigorous critical assessments help provide clearer picture extent cladocerans.

Language: Английский

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Environmental filtering governs consistent vertical zonation in sedimentary microbial communities across disconnected mountain lakes

Environmental Microbiology, Journal Year: 2024, Volume and Issue: 26(3)

Published: March 1, 2024

Abstract Subsurface microorganisms make up the majority of Earth's microbial biomass, but ecological processes governing surface communities may not explain community patterns at depth because burial. Depth constrains dispersal and energy availability, when combined with geographic isolation across landscapes, influence assembly. We sequenced 16S rRNA gene bacteria archaea from 48 sediment cores 36 lakes in four disconnected mountain ranges Wyoming, USA used null models to infer assembly depth, spatial isolation, varying environments. Although we expected strong limitations these isolated settings, composition was primarily shaped by environmental selection. Communities consistently shifted domination organisms that degrade organic matter methanogenic, low‐energy adapted taxa deeper zones. Stochastic processes—like limitation—contributed differences among lakes, effects weakened selection ultimately governed subsurface biogeography.

Language: Английский

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Paleoreconstructions of ciliate communities reveal long-term ecological changes in temperate lakes

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: May 12, 2022

Abstract Ciliates are unicellular heterotrophic organisms that play a key role in aquatic planktonic and benthic food webs. Advances sedimentary DNA (sed-DNA) analysis offer the possibility to integrate these bioindicators paleoenvironmental reconstructions. In this study, we used top–bottom paleolimnological approach metabarcoding techniques applied sed-DNA compare recent past (i.e. prior major anthropogenic impacts) ciliate communities of 48 lakes located along an elevation gradient. Our results show overall decline β-diversity time, especially lowland lakes, which more strongly exposed local human pressures. Analyses functional groups indicate important restructuration web, including increase mixotrophs. Moreover, changes ciliates were consistent with widespread deep water anoxia. provided evidence can uncover information about on wide variety lakes. Overall, our study demonstrates potential using as new paleoindicators, integrating from pelagic zones, providing valuable insights into ecosystem functioning through trait-based community approach. As paleoindicator, they thus holistic view long-term ecosystems.

Language: Английский

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