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
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
EstablishMed, a dataset of transition probabilities for woody plant establishment in the Mediterranean Region DOI Creative Commons
Lucía Acevedo‐Limón, Beatriz Rumeu, Claudio Açaí Bracho Estévanez

et al.

Global Ecology and Biogeography, Journal Year: 2024, Volume and Issue: 33(9)

Published: June 17, 2024

Abstract Motivation Plant establishment is the result of sequential demographic processes, namely post‐dispersal seed survival, germination, seedling survival and sapling survival. These processes can be quantified as transition probabilities between life stages through field experiments, their product provides an overall probability. This information essential to understand demography within populations plant colonization potential under global change scenarios. The Mediterranean Region constitutes a biodiversity hotspot characterised by severe summer droughts, which suppose critical bottleneck for perennial establishment. Despite many studies have woody species in this region, scattered literature has not yet been compiled. To fill gap, we collated data from systematic review completed them with new unpublished create EstablishMed dataset. Main types variables contained compilation 4728 records that quantify operating during All belong native were obtained situ conditions. Each record includes about specific spatiotemporal context study (i.e., year, site, population, habitat microhabitat) experimental procedures employed (e.g., degree protection against natural enemies). In addition, included taxonomic trait mass, dispersal syndrome form), bioclimate sites. Spatial location grain dataset covers whole Region. finest spatial resolution corresponds microhabitat populations. Time period Data extracted 271 originated 1991 2024. Major taxa level measurement 134 80 genera 39 families. Software format available .csv Dryad repository.

Language: Английский

Citations

1
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
Seed dispersal by wintering ducks in a coastal wetland of eastern China DOI Creative Commons
Xin Luo, Ning Li,

Wei Tai

et al.

Avian Research, Journal Year: 2024, Volume and Issue: 15, P. 100209 - 100209

Published: Jan. 1, 2024

Language: Английский

Citations

1
Correlated evolution of dispersal traits and habitat preference in the melicgrasses DOI Creative Commons
William H. Brightly, Ana M. Bedoya,

McKenzie M. Carlson

et al.

American Journal of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Seed dispersal is a critical process impacting individual plants and their communities. Plants have evolved numerous strategies structures to disperse seeds, but the evolutionary drivers of this diversity remain poorly understood in most lineages. We tested hypothesis that evolution wind traits within melicgrasses (Poaceae: Meliceae Link ex Endl.) was correlated with occupation open disturbed habitats.

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