Investment in seed dispersal structures is linked to invasiveness in exotic plant species of south-eastern Australia

Murray, Brad R.; Phillips, Megan L.

doi:10.1007/s10530-009-9637-7

Cited by 41 publications

(34 citation statements)

References 33 publications

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“…Thus, ecologists have recently paid special attention to the successful invasion mechanism of those invaders [1][2] -particularly their reproductive allocation strategy (RA, i.e., the proportion of biomass allocated to reproductive structures) [4]. Some invasive plants successfully invade certain environments because those species feature fecundity and high-efficiency multiple reproduction modes [4][5]. Meanwhile, functional traits determine how plants reproduce and gain resources [6], and such traits affect the success of a species in competition with other species for living resources [7][8].…”

Section: Introductionmentioning

confidence: 99%

Reproductive Allocation Strategy of Two Herbaceous Invasive Plants Across Different Cover Classes

Wang¹,

Zhou²,

Liu³

et al. 2017

Pol. J. Environ. Stud.

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Plant invasion succeeds because of such invader characteristics as fecundity and high-efficiency multiple reproduction modes. The acquisition of individual resources and the benefits of individual fitness are driven by optimum patterns of life history and trade-offs of reproductive allocation (RA) in plants, and variations in RA strategy play an key role in plant adaptation to environmental changes. Thus determining the RA strategy of invasive plants is important for understanding the successful mechanism underlying plant invasion. This study aims to determine the reproductive allocation (RA) strategy of two herbaceous invasive plants (Conyza canadensis and Solidago canadensis) across different cover classes in eastern China. Plant height, maximum branch length, the reproductive branch number, aboveground biomass, the amount of reproductive investment, and the coefficient of RA of the two plants decreased with increasing cover class (although the changes were not pronounced). Thus the two plants may decrease physiological investment on reproductive behavior and reduce RA under competitive conditions because of interspecies competition that progressively decreased and intraspecific competition that gradually increased with increasing cover class. The RA of the two plants may be principally influenced by plant community composition at low cover classes, but by soil pH at high cover classes. This may be the outcome that soil pH of the two plants decreased with increasing cover class significantly. Thus, intraspecific competition for resources may play an important role in the RA strategy of the two plants under high cover class.

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Section: Introductionmentioning

confidence: 99%

Reproductive Allocation Strategy of Two Herbaceous Invasive Plants Across Different Cover Classes

Wang¹,

Zhou²,

Liu³

et al. 2017

Pol. J. Environ. Stud.

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“…It has often been suggested that introduced and/or invasive species have greater natural dispersal abilities than do native or less invasive species [1–4]. For instance Murray and Phillips [1] state that “naturalized invasive species that spread by seed possess enhanced strategies for seed dispersal that are either absent or at least not as prevalent in naturalized species that are not invasive”.…”

Section: Introductionmentioning

confidence: 99%

“…For instance Murray and Phillips [1] state that “naturalized invasive species that spread by seed possess enhanced strategies for seed dispersal that are either absent or at least not as prevalent in naturalized species that are not invasive”. Thompson and Davis [5] state that research on traits of invasive plants “has revealed that, when compared with natives or non-invasive aliens, invasive aliens …produce more seeds that are better dispersed…”, and Ordonez and Olff [4] state that “ analyses comparing regional and global species pools of natives and aliens have found that aliens … .…”

Section: Introductionmentioning

confidence: 99%

Are Introduced Species Better Dispersers Than Native Species? A Global Comparative Study of Seed Dispersal Distance

et al. 2013

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We provide the first global test of the idea that introduced species have greater seed dispersal distances than do native species, using data for 51 introduced and 360 native species from the global literature. Counter to our expectations, there was no significant difference in mean or maximum dispersal distance between introduced and native species. Next, we asked whether differences in dispersal distance might have been obscured by differences in seed mass, plant height and dispersal syndrome, all traits that affect dispersal distance and which can differ between native and introduced species. When we included all three variables in the model, there was no clear difference in dispersal distance between introduced and native species. These results remained consistent when we performed analyses including a random effect for site. Analyses also showed that the lack of a significant difference in dispersal distance was not due to differences in biome, taxonomic composition, growth form, nitrogen fixation, our inclusion of non-invasive introduced species, or our exclusion of species with human-assisted dispersal. Thus, if introduced species do have higher spread rates, it seems likely that these are driven by differences in post-dispersal processes such as germination, seedling survival, and survival to reproduction.

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“…Natal grass seeds are light; a gram contains from 1,311 to 1,417 (21) . The small weight of the seed and its plumose characteristics are attributes for an efficient and fast dispersion (39,40,41) .…”

Section: Seed Productionmentioning

confidence: 99%

“…Las semillas de rosado son livianas; un gramo contiene de 1,311 a 1,417 (21) . El peso de la semilla y su característica plumosa le confieren atributos para una eficiente y rápida dispersión (39,40,41) .…”

Section: Producción De Semillaunclassified

Biología del pasto rosado Melinis repens (Willd.) e implicaciones para su aprovechamiento o control

Melgoza‐Castillo¹,

Valladares²,

González³

et al. 2015

RMCP

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RESUMEN El pasto rosado (Melinis repens) es una especie introducida de África que invade diversos ecosistemas. EnMéxico se encuentra en todos los Estados, y en Chihuahua es la especie dominante en extensas áreas de pastizales. Las invasiones reducen la calidad y cantidad de los productos y servicios del ecosistema. No se sabe exactamente cuándo llegó al continente americano. Dependiendo de las condiciones climáticas puede comportarse como anual o perenne de vida corta. Produce abundante semilla durante años con precipitaciones por debajo de lo normal comparados con años lluviosos. La germinación de la semilla puede ser en presencia de luz o sin ella, la máxima germinación es entre 20 a 35 ºC; a -0.2 MPa se inhibe la germinación y el fuego no la afecta. ABSTRACTNatal grass (Melinis repens) is an introduced specie from Africa that is invading different ecosystems. In Mexico, it is present all over the country and dominates large areas of grasslands. Plant invasion reduces quality and quantity of ecosystem goods and services. The knowledge of the biology of invasive species is a key factor when a management and control plan will be established. It is unknown when this specie arrived to America. Depending on climatic conditions this grass may behave as annual or perennial. Seed production is larger in years with precipitation below normal than in wet years. Germination takes place with or without light, optimum temperature is from 20 to 35 ºC; at -0.2 MPa germination is inhibited, and fire does not affect seed germination. When moisture is not limited and during the early development, root:shoot ratios ranges from 1.13 to 1.90 and relative growth rate from 0.0034 to 0.15 mg g-1 d-1 ; also, biomass is reduced when natal grass grows on native soil compared to sterilized soil. Although it is considered as poor forage, the main use is as pasture. Other uses reported include ornamental, medicinal, and fito-remediation. Fire favors its growth, and no control method is known. So far, grazing of natal grass is the most viable management. Additionally, when planning a control campaign it is important to reduce the movement of this specie as part of human activities.

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Investment in seed dispersal structures is linked to invasiveness in exotic plant species of south-eastern Australia

Cited by 41 publications

References 33 publications

Reproductive Allocation Strategy of Two Herbaceous Invasive Plants Across Different Cover Classes

Reproductive Allocation Strategy of Two Herbaceous Invasive Plants Across Different Cover Classes

Are Introduced Species Better Dispersers Than Native Species? A Global Comparative Study of Seed Dispersal Distance

Biología del pasto rosado Melinis repens (Willd.) e implicaciones para su aprovechamiento o control

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