Non-native freshwater molluscs: a brief global review of species, pathways, impacts and management strategies

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

Published: Jan. 22, 2025

Language: Английский

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White stork movements reveal the ecological connectivity between landfills and different habitats

Movement Ecology, Journal Year: 2023, Volume and Issue: 11(1)

Published: March 28, 2023

Connections between habitats are key to a full understanding of anthropic impacts on ecosystems. Freshwater especially biodiverse, yet depend exchange with terrestrial habitats. White storks (Ciconia ciconia) widespread opportunists that often forage in landfills and then visit wetlands, among other It is well known white ingest contaminants at (such as plastics antibiotic resistant bacteria), which can be deposited through their faeces regurgitated pellets.We characterized the role habitat connectivity by analyzing GPS data from populations breeding Germany wintering Spain Morocco. We overlaid tracks land-use surface construct spatially-explicit network nodes were sites, links direct flights. calculated centrality metrics, identified spatial modules, quantified overall connections types. For regional networks southern northern Morocco, we built Exponential Random Graph Models (ERGMs) explain topologies response node habitat.For Morocco combined, directed 114 370 valued links. Landfills type most connected others, measured The relevance was confirmed both ERGMs, significant positive effects this source In ERGM for Spain, found rice fields salines (solar saltworks) sinks By contrast, effect marshes sink flights.These results illustrate how connect aquatic habitats, some managed food production. specific interconnected patches across could used further studies biovectoring pollutants, pathogens propagules.

Language: Английский

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Hydroperiod length, not pond age, determines zooplankton taxonomic and functional diversity in temporary ponds

Ecological Indicators, Journal Year: 2024, Volume and Issue: 159, P. 111632 - 111632

Published: Jan. 24, 2024

Mediterranean Temporary ponds (MTPs) are suffering severe alterations in their hydrological and salinity regime through global change, restoration or conservation of these habitats is a priority. However, there little information that can be used as scientific basis for restoration. We studied the taxonomic functional diversity zooplankton communities set 96 Doñana, Spain during four consecutive hydroperiods after creation. examined differences across alpha beta (and its turnover nestedness components) rotifer, cladoceran copepod community, well influence local environmental variables including proximity to natural wetlands. There was no general increase indices first two hydroperiods. found shorter significantly reduced diversity, but increased contribution turnover. Shorter also community complexity, with long-term effects. Conductivity most important predictor direction effects changed between The distance from source colonists, pond depth, were key early stage assembly perturbation. Our results suggest new projects MTPs should focus on increasing heterogeneity reducing vulnerability salinization. use approaches monitoring studies improve our understanding mechanisms processes affecting under dynamic regimes. This turn help us predict consequences management policies biodiversity MTPs.

Language: Английский

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Migratory geese allow plants to disperse to cooler latitudes across the ocean

Journal of Biogeography, Journal Year: 2023, Volume and Issue: 50(9), P. 1602 - 1614

Published: June 13, 2023

Abstract Aim How plants can disperse in response to global change is a critical question, yet major knowledge gaps persist about long‐distance dispersal (LDD) mechanisms. We studied the potential migratory waterfowl has for LDD of flowering via gut passage seeds (endozoochory), comparing spring and autumn migration. Location United Kingdom Iceland. Taxon Pink‐footed Goose ( Anser brachyrhynchus , Baillon) Angiosperma. Methods endozoochory by geese migrating within between UK Iceland faecal sampling GPS tracking. collected 614 samples from 14 areas one Using tracks these areas, we estimated how far be dispersed geese, where or from. Results recorded 5507 intact 35 species (27 terrestrial) 15 plant families, with lower seed abundance per dropping when birds were northwards during than upon their arrival autumn. Species richness was highest Only four had an “endozoochory syndrome”. movements showed that retained guts up 24 h readily both directions Iceland, maximum distances exceeding 2000 km, as well localities separated 100 s km. Movements ≤400 km even While at stopover sites, daily roost feeding sites often exceed 20 Main Conclusions are vectors previously assumed lack mechanism. Spring migration not only period move cooler latitudes. The pink‐footed goose allow terrestrial aquatic cross ocean keep pace climate change.

Language: Английский

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Float, fly, then sink: wetland plant seed buoyancy is lost after internal dispersal by waterbirds

Hydrobiologia, Journal Year: 2024, Volume and Issue: 851(16), P. 4033 - 4048

Published: June 12, 2024

Abstract Seed dispersal distance is an important indicator of how well a plant species can cope with environmental changes. Seeds wetland plants are primarily dispersed by hydrochory (floating on the water surface) or endozoochory (ingestion and egestion animals). However, both mechanisms also be combined (diplochory), which increases distances. In wetlands, seeds often float surface before ingestion transport animals, such as waterbirds. Here, we consider what happens next after test whether inside waterbirds then continue to disperse hydrochory. We experimentally assessed buoyancy capacity 41 for 14 weeks simulated passage through avian digestive systems. This revealed that (1) previously assigned syndrome floated longer than those from other syndromes, but considerable overlap; (2) fully aquatic shoreline had stronger terrestrial plants; (3) processes negatively affected seed all species, included typical syndrome. The more limited beforehand, strong implications effectiveness dispersal.

Language: Английский

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Metabolically active angiosperms survive passage through the digestive tract of a large-bodied waterbird

Royal Society Open Science, Journal Year: 2023, Volume and Issue: 10(3)

Published: March 1, 2023

Avian vectors, such as ducks, swans and geese, are important dispersers of plant propagules. Until recently, it was thought that small vegetative propagules were reliant on adherence to vectors unlikely survive passage through the avian digestive tract. Here, we conclusively demonstrate metabolically active angiosperms can tract a large-bodied waterbird. In addition, show extended periods air exposure for up 7 days does not inhibit survival plantlets embedded in faecal matter. Following exposure, (n = 3000) recovered from 75 samples mute swans, Cygnus olor, with 203 plantlets. The number surviving did significantly differ among durations exposure. For plantlets, long-term viability clonal reproduction two duckweed species, Lemna minor L. gibba, confirmed following greater than eight months growth. These data further amplify key role waterbirds aquatic dispersal internal transport (i.e. endozoochory) suggest by is likely be common occurrence, underpinning connectivity, range expansion invasions some plants.

Language: Английский

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Winged resistance: Storks and gulls increase carriage of antibiotic resistance by shifting from paddy fields to landfills

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 914, P. 169946 - 169946

Published: Jan. 8, 2024

Waterbirds are vectors for the dissemination of antimicrobial resistance across environments, with some species increasingly reliant on highly anthropized habitats feeding. However, data impact their feeding habits carriage antibiotic genes (ARGs) still scarce. To fill this gap, we examined microbiota (16S rRNA amplicon gene sequencing) and prevalence ARG (high-throughput qPCR 47 genes) in faeces from white storks (Ciconia ciconia) lesser black-backed gulls (Larus fuscus) (landfill) less (paddy fields) polluted habitats. Faecal bacterial richness diversity were higher upon landfills showed a greater abundance potential pathogens, such as Staphylococcus. In contrast, faecal communities similar regardless habitat preferences, maybe due to intense use compared gulls. addition, birds landfill carried burden ARGs surrounding soil surface waters. Network analysis revealed strong correlations between particularly tetM (resistance tetracyclines), blaCMY (beta-lactam resistance), sul1 (sulfonamide resistance) members genera Streptococcus, Peptostreptococcus, Peptoclostridium. Our work demonstrates how transitioning paddy fields fosters pathogens bird gut, shedding light ecological role these avian dissemination.

Language: Английский

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Big rodents disperse small seeds and spores in Neotropical wetlands

Journal of Ecology, Journal Year: 2024, Volume and Issue: 112(8), P. 1743 - 1757

Published: June 12, 2024

Abstract The role of large frugivores in the dispersal tropical trees has been well‐studied, whereas importance world's largest rodents for plant previously ignored. We studied by gut passage (endozoochory) Neotropical wetlands extant rodent, capybara Hydrochoerus hydrochaeris . compared it with another 10 rodents, nutria or coypu Myocastor coypus collected 96 faecal samples (50 capybara, 46 nutria) from sites within Taim Ramsar site southern Brazil, and extracted intact propagules g subsamples. Propagules 27 taxa (24 angiosperms, three aquatic ferns) were recovered, representing 13 families. Whole Spirodela (duckweed) plants dispersed. Seeds 14 angiosperm germinated laboratory. Taxonomic composition was significantly different two mammals, but propagule size not. Capybara dispersed more terrestrial per sample, nutrias propagules. When total production taken into account, an estimated 1025 (including 133 fern spores) each day, 691 566 spores). Capybaras have larger home ranges likely over a greater distance. Synthesis : This is first demonstration that disperse pteridophytes as well flowering plants. Our results suggest capybaras play important, complementary roles dispersing variety species wetlands. study indicates herbivorous mammals vectors small seeds non‐fleshy fruits overlooked neotropics defaunation herbivores can negative consequences, manner similar to highlighted frugivores.

Language: Английский

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The underappreciated roles of aboveground vertebrates on belowground communities

Trends in Ecology & Evolution, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Anostracans muddy the water: Anostracans from North American lakes show unclear phylogenetic relationships between taxa, and distinctive dispersal patterns

Inland Waters, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 44

Published: Jan. 17, 2025

Dispersal is essential for all organisms to enable colonization of new areas. Like many other aquatic invertebrates, Anostraca (Crustacea) disperse passively as dormant fertilized eggs. Here, we first study the genetic diversity Branchinecta fairy shrimps (identified morphologically B. readingi) inhabiting lakes in Saskatchewan and British Columbia, Canada. Secondly, attempt reconstruct phylogeny dispersal events that explain their distribution. Finally, compare distribution sp. Artemia franciscana, two anostracans but with different salinity niches. To this aim, sequenced CO1 16S gene fragments individuals collected from eight lakes. We found a relatively high number haplotypes both markers (79 76 16S) Saskatchewan. Three clades at region were Branchinecta, one these being widely recorded previously USA (but described mackini). In contrast, 54 A. franciscana which sequences belonged clade. This suggests might be originating several distinct Ice Age refugia, contrary single refuge. High density suitable habitats (>100,000 Saskatchewan), weak priority effects frequent could studied Branchinecta. However, no support distinction between readingi mackini.

Language: Английский

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