Influence of achene heteromorphism on life-cycle traits in the annual weed gallant soldier (Galinsoga parviflora Cav.)

Kucewicz, Magdalena; Gojlo, E.

doi:10.1016/j.flora.2014.08.010

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…As a prolific invader, G. parviflora has no noticeable maternal effect during most stages of the progeny lifecycle, and the growth rate, average height, and phenological phases of the two generations seem to be synchronized, with a strong chemosensory effect [39,43]. The species has a short reproduction cycle of less than 50 days and can produce an average of 65 million non-dormant seeds per hectare, with a high potential to form a seed bank in the soil [44].…”

Section: Discussionmentioning

confidence: 99%

Predicting the Potential Risk Area of the Invasive Plant Galinsoga parviflora in Tibet Using the MaxEnt Model

Wang,

Zeng,

Chen

et al. 2024

Sustainability

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The Tibetan plateau, with complex and diverse ecosystems, is an important ecological security barrier to China. However, climate change and the spread of invasive plant species have imperiled the once pristine and diverse ecosystem of the region. To prevent the further spread and control of invasive plants, it is important to delineate the potential distribution patterns of alien invasive plants at the regional scale across Tibet and understand their responses to climate change. Galinsoga parviflora Cav., a member of the family Asteraceae, is an annual herbaceous plant distributed globally as an invasive weed and possesses characteristics that make it highly invasive, such as a strong ability to proliferate and disperse. The species is also known to have an allelopathic effect. There has been no report on the spatial distribution of G. parviflora in Tibet. Using field survey data, we investigated the risk of G. parviflora invasion and its impacts on the ecological safety of Tibet. We employed the MaxEnt model using the R language and SPSS software to optimize and select model parameters and data. We acquired various environmental variables along with current and future climate change scenarios (two carbon emission scenarios, SSP126 and SSP585, for the years 2050 and 2090) to predict the geographic distribution and potential risk areas in Tibet that G. parviflora can invade. The MaxEnt model accurately predicted the distribution of G. parviflora in Tibet with an average AUC of 0.985. The most suitable environmental conditions in which G. parviflora performed the best in Tibet included a mean annual temperature of 6.2–10.0 °C and an elevation range of 2672–3744 m above sea level. Our results indicate that low precipitation during the coldest quarter of the year (mean temperature −2–3 °C) was the most important variable predicting G. parviflora distribution. The results also showed that the species was hardly found when precipitation in the coldest quarter exceeded 155 mm. The current potential invasion risk areas for G. parviflora included the river valleys of central, southeastern, and eastern Tibet. With future climate change scenarios (i.e., SSP126, SSP585), the suitable habitats for G. parviflora distribution will likely shift to northwest regions from the southeast. Particularly under the highest carbon emission scenario (i.e., SSP585), the potential risk area expands more rapidly, and the center of distribution shifts to northwest regions. These findings provide useful information about the current and future changes in G. parviflora distribution in Tibet, which is crucial for the comprehensive and proactive management and control of G. parviflora under future climate change.

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Section: Discussionmentioning

confidence: 99%

Predicting the Potential Risk Area of the Invasive Plant Galinsoga parviflora in Tibet Using the MaxEnt Model

Wang,

Zeng,

Chen

et al. 2024

Sustainability

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“…The presence/absence of dispersal structures is a functionally significant case of diaspore heteromorphism (Cheptou et al, 2008;Imbert, 2002;Kucewicz and Gojło, 2014). Diaspore morphological variability is largely maternally controlled, and dispersal structures are generally formed from the maternal plant's tissues such as outgrowths of the ovary wall, the receptacle or the achene (Donohue, 1999;Harper, 1977;Zhang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Diaspore heteromorphism in the invasive Bromus tectorum L. (Poaceae): Sterile florets increase dispersal propensity and distance

Monty

Maebe

Mahy

et al. 2016

Flora

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Please cite this article as: Monty, Arnaud, Maebe, Laura, Mahy, Grégory, Brown, Cynthia S., Diaspore heteromorphism in the invasive Bromus tectorum L.(Poaceae): sterile florets increase dispersal propensity and distance.Flora http://dx.doi.org/10.1016/j.flora. 2016.06.004 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.  Bromus tectorum is a troublesome invasive grass in North America.  The sterility of terminal florets induces a diaspore heteromorphism.  Dispersal of diaspores with and without sterile florets attached was investigated.  Primary and secondary dispersal by biotic and abiotic agents were considered.  Across the study, diaspores with sterile florets were better dispersers. 2 AbstractWithin a species, the distance travelled by a particular diaspore depends on its morphology. In Poaceae, the presence of terminal sterile florets can lead to diaspore heteromorphism, which may influence dispersal. We tested the hypothesis that the presence of sterile florets favored dispersal in Bromus tectorum L., an invasive grass in the Western US.We used field and controlled experiments to study the dispersal of caryopses with and without sterile florets attached (respectively complex and simple diaspores), as well as pieces of inflorescence that detached from the mother plants. We considered both primary and secondary dispersal, as well as abiotic and biotic dispersal agents. The distance travelled by the diaspores and their attachment to animal fur were related to the presence and number of sterile florets.Abiotic agents moved diaspores over relatively short distances, both in terms of primary and secondary dispersal. A significant proportion of diaspores attached to fur, suggesting a potential for dispersal over longdistances. Complex diaspores were better dispersers than simple ones (and pieces of inflorescence), and this pattern was consistent across the study. However, among complex diaspores, the number of sterile florets had little or no influence.Considering primary and secondary dispersal by abiotic and biotic agents provided a general picture of the dispersal ecology of B. tectorum. For all the dispersal steps and dispersal agents we studied, the presence of sterile florets favored dispersal. These results highlight the functional significance of diaspore heteromorphism induced by floret sterility in the dispersal of Poaceae.

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Seed size dimorphism and environmental factors govern the phenological variations in invasive plant Hyptis suaveolens

Rathee,

Sharma,

Ahmad

et al. 2024

Ecological Informatics

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Influence of achene heteromorphism on life-cycle traits in the annual weed gallant soldier (Galinsoga parviflora Cav.)

Cited by 3 publications

References 31 publications

Predicting the Potential Risk Area of the Invasive Plant Galinsoga parviflora in Tibet Using the MaxEnt Model

Predicting the Potential Risk Area of the Invasive Plant Galinsoga parviflora in Tibet Using the MaxEnt Model

Diaspore heteromorphism in the invasive Bromus tectorum L. (Poaceae): Sterile florets increase dispersal propensity and distance

Seed size dimorphism and environmental factors govern the phenological variations in invasive plant Hyptis suaveolens

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