Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights from eDNA and Traditional Sampling

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract The expansion of artisanal and small-scale gold mining (ASGM) in the Madre de Dios region Peruvian Amazon has transformed primary forests into a novel wetland complex thousands abandoned ponds. Despite their ecological relevance, post-mining recovery these systems remains understudied, particularly regarding fish biodiversity recolonization. In this study, we evaluate community richness composition ponds different dimensions, years post abandonment, degree pulse flood connectivity using traditional collection-based methods environmental DNA (eDNA) with 12S COI markers. We compared two inventory contrasted results from ASGM waterbodies those obtained nearby pristine oxbow lakes. Overall, registered more at all sites eDNA vs methods, especially marker. identified 14 13 unique genera eDNA, respectively, 40 detected by both approaches, evidencing complementarity. Notably, found that flooding was main predictor species among (p-value < 0.05). 11 to 22, 23 71, 56 morphospecies non-flooded ponds, flooded lakes, respectively. Furthermore, most influenced were similar Our findings highlight role hydrological within mining-impacted wetlands. Future restoration efforts should enhance aquatic accelerate environments.

Language: Английский

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Dietary data suggest large branchiopods may be an underrecognised food resource for a wide range of waterbirds

Hydrobiologia, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

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Recent Long‐Distance‐Dispersal Explains the Range Disjunction of the Old‐Word Cockleburs (Xanthium strumarium)

Journal of Biogeography, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

ABSTRACT Aim In the present study, we focused in addressing questions concerning biogeographic history of Xanthium strumarium , an Old World native species whose close relatives are generally all to American continent. Location The distribution covers Eurasian continent and some African regions islands. Methods We employed herbarium material target enrichment (herbariomics) sequence data over 700 single copy loci estimate divergence times species. Ancestral range reconstruction was test different hypotheses on events that determined arrival, differentiation dispersal ancestor X. World. Results crown age estimated be ~156.58 ka. phylogenomic analysis, individuals from geographic areas grouped mostly congruently based their collection origin, earliest diverging clade comprising samples India, then progressively clades including Asia, Europe Africa. same pattern observed with a movement ancestral ranges going east west. inferred Indian subcontinent. Main Conclusions Both use specimens as old 240 years modern sequencing techniques clarified phylogenetic relationships, time biogeography . Most probably, reached by way trans‐Pacific long‐distance Americas Southeastern followed westward colonisation

Language: Английский

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Secondary Dispersal of Wetland Plants by Neotropical Otters

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(2)

Published: Feb. 1, 2025

ABSTRACT Carnivorous mammals can disperse seeds and other plant propagules through gut passage (endozoochory). Otters are semiaquatic mustelids opportunistic carnivores that prey on various vertebrates, their feeding habits lead to secondary dispersal of propagules. However, this by otters has not previously been investigated. Here, we investigated the internal plants neotropical otters, Lontra longicaudis , in southern Brazil. We collected 31 faecal samples (spraints) from at a Brazilian Ramsar site Pampa biome during wet season 2022. Intact were separated each spraint, identified, germinability tested where possible. The classes vertebrate preyed upon spraint identified. effects these mass taxonomic richness abundance associated with aquatic and/or terrestrial substrates. recorded 1206 belonging 33 taxa (one charophyte, four pteridophytes, 28 angiosperms), representing 18 families including 20 strictly macrophytes. Seeds six angiosperm germinated, low overall germination rate 2%. All spraints contained fish, while 10 also remains reptiles, amphibians, mammals. was positively correlated weight. Propagule depended both weight diversity spraint. Spraints three or larger had most Most likely dispersed “diploendozoochory” involving ingestion first then otters. Neotropical have wide home range, often travelling several kilometres daily, which promote carrying between different habitats. Synthesis: Our results suggest might play an important role wetland plants, notably ferns, potentially contributing maintenance ecosystems. rate, although low, represents opportunities for successful establishment some over longer distances than those provided otter prey, emphasising ecological importance even low‐probability events. This study underlines potential carnivorous maintaining ecosystem connectivity.

Language: Английский

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Insights into the recent evolutionary history of salt lake gastropods (Coxiella) in Australia

Hydrobiologia, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Language: Английский

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Variación de la diversidad beta entre tipos de plantas con diferente dependencia del agua en los palmares áridos de la península de Baja California

Revista Mexicana de Biodiversidad, Journal Year: 2025, Volume and Issue: 96, P. e965386 - e965386

Published: Feb. 21, 2025

Los palmares de la península Baja California conforman una red semi-aislada humedales áridos por más 1,000 km. Las plantas estos muestran distinto grado adaptación acuática, incluyendo tres tipos hidrófitas (acuáticas, subacuáticas y tolerantes) no o intolerantes. Nuestro objetivo fue evaluar el efecto que diferente especialización acuática entre grupos tiene en su cambio similitud florística respecto a distancia. Después revisar literatura científica, compilamos relación 25 región encontramos 518 especies (27 acuáticas, 57 subacuáticas, 53 tolerantes 381 intolerantes). Utilizamos índice Sørensen para estimar los 4 analizamos cómo cambia función distancia palamares. La disminuyó al aumentar distancia, según un modelo exponencial negativo (S=S0·e-bd), con tasa disminución (b) creciente conforme es menor dependencia del agua (bAcuáticas = 0.0010, bSubacuáticas 0.0016, bTolerantes 0.0029, bIntolerantes 0.0046). En síntesis, las afecta patrón geográfico diversidad beta humedales.

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Ephemeral Wetland Macroinvertebrate Communities Across Climate Regions Share Similar Functional Trait Composition Despite Near‐Total Taxa Replacement

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(4)

Published: April 1, 2025

ABSTRACT Community assembly in aquatic habitats is heavily influenced by hydrology, but understanding the influence of other habitat conditions also critical. Most studies focus on comparisons geographically close communities that exist under diverse hydrological regimes, this framework limits our ability to understand how than hydrology shape ephemeral wetland communities. Here, we investigated macroinvertebrate vary with local, landscape, and climate variables wetlands across a large geographic range few barriers. We sampled North Dakota, New Mexico, Texas (USA) 2021 Dakota Mexico 2022. used an array hydrographic, climate, spatial relate taxonomic functional community composition diversity conditions. Taxonomic was overwhelmingly different among states between years: landscape‐scale refuge availability explained variation composition, local climate‐scale only within context variables. Trait similar most sampling groups, distinct trait assemblages occurred No predictor variable matrix alone, arrangement predicted when considering overlapping Taxa indices were associated increased at landscape scale. Our results show consistent structure geographical scale hydrologically wetlands, despite almost complete turnover regions. Patterns imply incorporating multiple scales critical composition. Despite regimes potential for connectivity via dispersal, taxa replacement high regions single grassland macrosystem. overall change provided suite structuring Further, cases, elicits response

Language: Английский

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Waterfowl Endozoochory: Traits Drive Plant–Bird Dispersal Interactions in North America

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(4)

Published: April 1, 2025

ABSTRACT Plant biogeography and ongoing changes in plant distributions are influenced by long‐distance dispersal (LDD) of seeds, migratory waterfowl (Anatidae: Ducks, geese swans) particularly important for the plants around wetlands through gut passage (endozoochory). However, this is not contemplated classical syndromes; hence, currently we have limited understanding what angiosperm traits predict seed any differences due to avian trait variation among species. We conducted a literature search data on presence seeds alimentary canal or faeces North American as proxy interactions, since an fraction these survives passage. present list flowering species ( N = 536) from 95 families potentially dispersed 38 species, together with their vectors. Owing largely sampling effort, 47% 35% genera recorded were only found single A suite analytical approaches revealed major whose ingested likely between foraging groups (guilds) relation other traits. Diving ducks sea associated sublittoral that submerged floating leaves, hence hydrochory syndrome. Dabbling herbivorous (notably geese) terrestrial herbaceous plants, also unspecialised syndrome common plants. Plants larger greater height more be dabbling ducks, whereas shorter than waterfowl. Network analyses interactions generally consistent results, but provided evidence all geese, duck alike along terrestrial–aquatic gradient, instead occupy distinct niches. The traditional classification into guilds therefore does accurately reflect differing roles ingestion seeds. Aquatic had vector ones. Detailed studies endozoochory determinations needed facilitate predictions LDD population sizes migration patterns vary future climate change.

Language: Английский

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Landscape connectivity and genetic structure of animal populations in urban ponds

Conservation Genetics, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Language: Английский

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A phylogeographic pattern of the trans-Palaearctic littoral water flea Pleuroхus truncatus (O.F. Müller, 1785) (Cladocera: Chydoridae)

PeerJ, Journal Year: 2025, Volume and Issue: 13, P. e19355 - e19355

Published: April 24, 2025

Water fleas (Crustacea: Cladocera) are recently regarded as models for phylogeographic studies, but most such publications concerned the planktonic genera, first of all, Daphnia O.F. Müller. The aim our article is to study pattern a very common littoral chydorid Pleuroxus truncatus (O.F. Müller) based on sequences two mitochondrial (cytochrome oxidase (COI) and 16S) nuclear (18S 28S) genes. All totality could be subdivided into major clades, A, having predominantly European distribution with single exclusion, B, Asian distribution, few populations in Russia; clade B three subclades (B1–B3) moderate support. Earlier derived phylogroups (subclades B1 B2) distributed south portion Western Siberia. This known previously studied daphniids. Estimations (A B) subclade differentiation time P. different methods lie interval ca . 0.01–0.3 Mya. Therefore, whole revealed young, related Late Pleistocene more shallow compared Probably, total population was not so strongly split by unfavorable conditions during cold phases.

Language: Английский

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