Invasive Buttonweed Cotula coronopifolia (Asteraceae) Is Halotolerant and Has High Potential for Dispersal by Endozoochory DOI Creative Commons
Raúl Sánchez-García, Andy J. Green,

Lina Tomasson

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(16), P. 2219 - 2219

Published: Aug. 10, 2024

Buttonweed (Cotula coronopifolia) is native to South Africa but invasive in wetlands Europe, North America, and Australasia, where it excludes plants. Despite being dry-fruited, field studies suggest migratory waterbirds can disperse its seeds via gut passage (endozoochory), aiding expansion. To explore the potential for endozoochory different regions habitats, we collected from six populations Spain, Sweden, UK. Germination was tested under salinity levels (0, 5, 10, 15 g/L) simulated treatments: scarification, acidification, or both. No germination occurred at g/L. Higher reduced delayed germination, full treatment (i.e., both scarification acidification) increased germinability accelerated germination. Scarification acid alone resulted intermediate patterns. There were significant × population interactions on germinability. The acceleration effect of stronger 5-10 g/L than 0 This study highlights how birds facilitate spread alien plants introduced by humans. Endozoochory an understudied mechanism long-distance dispersal dry-fruited Further research C. coronopifolia, including genetics, necessary understand mechanisms management strategies.

Language: Английский

Float, fly, then sink: wetland plant seed buoyancy is lost after internal dispersal by waterbirds DOI Creative Commons
María J. Navarro‐Ramos, Andy J. Green, Robin de Vries

et al.

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

Citations

5
Secondary Dispersal of Wetland Plants by Neotropical Otters DOI
Pedro Henrique de Oliveira Hoffmann, Andressa Adolfo, Andy J. Green

et al.

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

Citations

0
Waterfowl Endozoochory: Traits Drive Plant–Bird Dispersal Interactions in North America DOI
Bia de Arruda Almeida, Giliandro G. Silva, Mihai Costea

et al.

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

Citations

0
High levels of seed dispersal by a declining wintering population of migratory geese DOI Creative Commons
Iciar Jiménez‐Martín, Adrián Monreal, Víctor Martín‐Vélez

et al.

Freshwater Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 3, 2024

Abstract Ducks are known to be important seed dispersers, but the role of geese in plant dispersal is less clear. Wintering populations migratory undergoing rapid changes distribution and habitat use response climate change land use, implications for have not previously been studied. At southern end Eurasian goose flyways, numbers declining through short‐stopping. The Doñana wetlands, or ‘marismas del Guadalquivir’, south‐west Spain were formerly Europe's most wintering grounds greylag Anser anser. There, we collected 151 faecal samples compare by endozoochory early late winter natural marshes ricefields. We also tested germinability simulated potential distances assess importance this decreasing population dry‐fruited plants assumed rely on abiotic over short distances. retrieved 1196 intact seeds belonging 24 different taxa, including eight species reported from waterfowl (Anatidae) vectors. Seeds present 47% samples, with a peak 90% November, compared only 27% ricefields at same time, marsh site February. Seed abundance richness per sample significantly higher than winter, artificial wetlands. Major differences composition between sampling sites partly related moisture requirements individual species. Germinability aquatic was when gut passage followed cold storage 2 months prior germination tests. events our using GPS tracking three geese. This suggested that can dispersed up 25 km during daily movements, median 0.2–5 km, depending site. frequent syndrome assigned barochory (gravity), disperse much farther mechanisms predicted their syndromes. Geese likely an connectivity within beyond Mediterranean providing ecosystem service which threatened behaviour. Our results highlight studying interactions involving waterbirds current context loss shifts, as many crucial may disappearing even before they discovered.

Language: Английский

Citations

3
Invasive Buttonweed Cotula coronopifolia (Asteraceae) Is Halotolerant and Has High Potential for Dispersal by Endozoochory DOI Open Access
Raúl Sánchez-García, Andy J. Green,

Lina Tomasson

et al.

Published: May 17, 2024

Buttonweed (Cotula coronopifolia) is native to South Africa but invasive in wetlands Europe, North America, and Australasia, where it excludes plants. Despite being dry-fruited, field studies suggest migratory waterbirds can disperse its seeds via gut passage (endozoochory), aiding expansion. To explore the potential for endozoochory different regions habitats, we collected from six populations Spain, Sweden, UK. Germination was tested under salinity levels (0, 5, 10, 15 g/L) simulated treatments: scarification, acidification, or both. No germination occurred at g/L. Higher reduced delayed germination, full treatment increased germinability accelerated germination. Scarification acid alone resulted intermediate patterns. There were significant x population interactions on germinability. The acceleration effect of stronger 5-10 g/L than 0 This study highlights how birds facilitate spread alien plants introduced by humans. Non-classical an understudied mechanism long-distance dispersal dry-fruited Further research C. coronopifolia, including genetics, necessary understand mechanisms management strategies.

Language: Английский

Citations

2
Plant traits associated with seed dispersal by ducks and geese in urban and natural habitats DOI Creative Commons
Pál Tóth, Andy J. Green, David M. Wilkinson

et al.

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(11)

Published: Nov. 1, 2023

Ducks and geese are little studied dispersal vectors for plants lacking a fleshy fruit, our understanding of the traits associated with these is limited. We analyzed 507 faecal samples mallard (Anas platyrhynchos) Canada goose (Branta canadensis) from 18 natural urban wetlands in England, where they dominant resident waterfowl. recovered 930 plant diaspores 39 taxa representing families, including 28 terrestrial five aquatic species four aliens. Mallards had more seeds seed per sample than geese, barochory hydrochory syndromes, that on average were larger greater moisture requirements (i.e., aquatic). dispersed habitats. Plant communities different between (e.g., achenes) capsules) Waterfowl can readily spread alien into environments but also allow native to disperse response climate heating or other global change. Throughout temperate regions Northern Hemisphere, accompanied by (either greylag goose) as most abundant waterfowl urbanized areas. This combination provides previously overlooked service diverse traits.

Language: Английский

Citations

6
Darwin’s Digestion Myth: Historical and Modern Perspectives on Our Understanding of Seed Dispersal by Waterbirds DOI Creative Commons
Andy J. Green, David M. Wilkinson

Seeds, Journal Year: 2024, Volume and Issue: 3(4), P. 505 - 527

Published: Sept. 24, 2024

Internal transport (endozoochory) and external (epizoochory) by migratory waterbirds are key mechanisms of long-distance dispersal for seeds other diaspores plants lacking a fleshy fruit. Beginning with Darwin in 1859, we review how opinions about the relative importance epizoochory endozoochory have changed repeatedly over time this allows us to reassess our modern understanding plant dispersal. was mistaken asserting that cannot survive passage through gut or granivorous birds. This “digestion myth” led him underestimate overstate epizoochory, an approach which is echoed throughout literature until present day. also focused on aquatic plants, yet it now clear major vectors terrestrial plants. Based their empirical observations experiments, less influential scientists (notably Hesselman 1897, Guppy 1906 Proctor 1960s) argued more important mechanism waterbirds. Modern field experimental studies demonstrate dominant role endozoochory. Unfortunately, avian dry-fruited continues be ignored as many ecologists, attribute Darwin’s continuing influence. However, has implications biogeography requires wider recognition research.

Language: Английский

Citations

1
Herbivory on aquatic macrophytes by geese and swans—a review of methods, effects, and management DOI Open Access
Elsie Kjeller, Jonas Waldenström, Johan Elmberg

et al.

Ornis Svecica, Journal Year: 2024, Volume and Issue: 34, P. 119 - 137

Published: Aug. 8, 2024

In recent decades, interest has grown in how increasing populations of herbivorous geese and swans (Anseriformes: Anatidae: Anserinae) affect macrophyte communities wetlands, especially because many waterbodies are simultaneously subjected to stressors like eutrophication biodiversity declines. Here, we review the literature on methods applied grazing experiments that have been conducted aquatic ecosystems. We also investigate different characteristics may respond waterfowl herbivory. Results indicate both research methodology responses macrophytes differ widely among studies. While most experimental studies pressure employ a ‘paired plot design’ with exclosures open control plots, structure, size, placement plots vary Commonly sampled variables biomass (of either above- or below-ground plant parts), density, height, cover, community composition. The provides support significantly several these variables, but outcome depends additional factors, e.g., water depth, timing (within between seasons/years). Because persisting conservation threats ecosystems, more knowledge is needed about potential direct indirect consequences herbivory environments.

Language: Английский

Citations

0
Regional differences in crippling rate in greylag geese Anser anser DOI Creative Commons
Johan Månsson, Niklas Liljebäck,

Ralph Buij

et al.

Wildlife Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Goose populations across Europe have been subjected to long‐standing harvest practices, which include shotgun hunting. In addition immediate mortality, hunting can affect an animal's fitness by inflicting non‐lethal injuries, often referred as ‘crippling' or ‘wounding'. This could subsequently negative effects on the population level and causes ethical concerns, ultimately challenging legitimacy of a management tool. Understanding spatial variation in crippling rate assist prioritize regions for enhancing awareness implementing measures aimed at reducing crippling. We examined greylag geese from three subpopulations (Nyköping, Örebro, Hudiksvall) breeding Sweden (Södermanland, Gävleborg) record prevalence imbedded pellets quantify impact. Our approach excludes birds that were wounded died without being retrieved. found subpopulations, 21% 176 x‐rayed carrying (average 2.33 pellets, range 1–16). Crippling varied among twice high Örebro Nyköping (26.4 25.0%, respectively) compared Hudiksvall (11.7%). However, probability crippled differed significantly only between (p = 0.04), but not (p>0.05) > 0.05). study elucidate mechanisms underlying observed regional variations rate. Nevertheless, disparities these rates, potential links rate, levels crop damage, attitudes, behaviors, present intriguing avenues future exploration.

Language: Английский

Citations

0
Invasive Buttonweed Cotula coronopifolia (Asteraceae) Is Halotolerant and Has High Potential for Dispersal by Endozoochory DOI Creative Commons
Raúl Sánchez-García, Andy J. Green,

Lina Tomasson

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(16), P. 2219 - 2219

Published: Aug. 10, 2024

Buttonweed (Cotula coronopifolia) is native to South Africa but invasive in wetlands Europe, North America, and Australasia, where it excludes plants. Despite being dry-fruited, field studies suggest migratory waterbirds can disperse its seeds via gut passage (endozoochory), aiding expansion. To explore the potential for endozoochory different regions habitats, we collected from six populations Spain, Sweden, UK. Germination was tested under salinity levels (0, 5, 10, 15 g/L) simulated treatments: scarification, acidification, or both. No germination occurred at g/L. Higher reduced delayed germination, full treatment (i.e., both scarification acidification) increased germinability accelerated germination. Scarification acid alone resulted intermediate patterns. There were significant × population interactions on germinability. The acceleration effect of stronger 5-10 g/L than 0 This study highlights how birds facilitate spread alien plants introduced by humans. Endozoochory an understudied mechanism long-distance dispersal dry-fruited Further research C. coronopifolia, including genetics, necessary understand mechanisms management strategies.

Language: Английский

Citations

0