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Traits of Heracleum sosnowskyi Plants in Monostand on Invaded Area.

Dalke IV, Chadin IF, Zakhozhiy IG, Malyshev RV, Maslova SP, Tabalenkova GN, Golovko TK - PLoS ONE (2015)

Bottom Line: Understanding of the mechanisms leading to monostand formation can aid in determining the limitations of existing community ecology models and establishing an effective management plan for invasive species elimination.H. sosnowskyi showed high (several orders of magnitude higher than average taiga zone grasses) photosynthetic water use efficiency (6-7 μM CO2/μM H2O).Formation of H. sosnowskyi monostands occurs primarily in disturbed areas with relatively rich and well-moistened soils.

View Article: PubMed Central - PubMed

Affiliation: Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Komi Republic, Russia.

ABSTRACT
The ability of giant hogweeds to form monodominant communities and even pure monostands in invaded areas has been well documented. Understanding of the mechanisms leading to monostand formation can aid in determining the limitations of existing community ecology models and establishing an effective management plan for invasive species elimination. The aim of this observational study was to investigate traits of Heracleum sosnowskyi plants (demography, canopy structure, morphology and physiology) of the plants in a pure stand in an invaded area useful for understanding potential monostand formation mechanisms. All measurements were performed in one typical Heracleum sosnowskyi monostand located in an abandoned agriculture field located in Syktyvkar city suburb (North-east Russia). This monostand consisted of five main plant growth stages: seed, seedling, juvenile, vegetative adult, and generative adult. Plants of all stages began to grow simultaneously shortly after the snowmelt, at the same time as spring ephemeral plant species grew. The density of generative plants did not change during the vegetation period, but the density of the other plant stages rapidly decreased after the formation of a tall (up to 2-2.5 m) and dense (Leaf area index up to 6.5) canopy. The canopy captured approximately 97% of the light. H. sosnowskyi showed high (several orders of magnitude higher than average taiga zone grasses) photosynthetic water use efficiency (6-7 μM CO2/μM H2O). Formation of H. sosnowskyi monostands occurs primarily in disturbed areas with relatively rich and well-moistened soils. Early commencement of growth, rapid formation of a dense canopy, high efficiency of light and water use during photosynthesis, ability of young plants to survive in low light conditions, rapid recovery of above-ground plant parts after damage, and the high density of the soil seed bank are the most important traits of H. sosnowskyi plants for monostand formation in invaded areas.

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Specific leaf area (SLA) at different metameres stem of Heracleum sosnowskyi.Symbols “a”, “b”, “c” designate the same groups segregated by Duncan's new multiple range test with a significance level at 0.05.
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pone.0142833.g005: Specific leaf area (SLA) at different metameres stem of Heracleum sosnowskyi.Symbols “a”, “b”, “c” designate the same groups segregated by Duncan's new multiple range test with a significance level at 0.05.

Mentions: The data on biomass allocation showed that H. sosnowskyi generative plants invested more than half of the assimilated carbon to supporting structures: stems and leaf petioles (Table 4). Umbels contribute up to 13% of the total biomass in the flowering stage. Despite the large size and high dry matter content, the portion of underground organs did not exceed 15% of the total plant dry weight (DW). H. sosnowskyi SLA without petiole ranged from 0.009–0.0125 m2/g DW. The SLA value depended on the leaf position on the shoot and was the lowest for leaves from the first two metameres (Fig 5).


Traits of Heracleum sosnowskyi Plants in Monostand on Invaded Area.

Dalke IV, Chadin IF, Zakhozhiy IG, Malyshev RV, Maslova SP, Tabalenkova GN, Golovko TK - PLoS ONE (2015)

Specific leaf area (SLA) at different metameres stem of Heracleum sosnowskyi.Symbols “a”, “b”, “c” designate the same groups segregated by Duncan's new multiple range test with a significance level at 0.05.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4643873&req=5

pone.0142833.g005: Specific leaf area (SLA) at different metameres stem of Heracleum sosnowskyi.Symbols “a”, “b”, “c” designate the same groups segregated by Duncan's new multiple range test with a significance level at 0.05.
Mentions: The data on biomass allocation showed that H. sosnowskyi generative plants invested more than half of the assimilated carbon to supporting structures: stems and leaf petioles (Table 4). Umbels contribute up to 13% of the total biomass in the flowering stage. Despite the large size and high dry matter content, the portion of underground organs did not exceed 15% of the total plant dry weight (DW). H. sosnowskyi SLA without petiole ranged from 0.009–0.0125 m2/g DW. The SLA value depended on the leaf position on the shoot and was the lowest for leaves from the first two metameres (Fig 5).

Bottom Line: Understanding of the mechanisms leading to monostand formation can aid in determining the limitations of existing community ecology models and establishing an effective management plan for invasive species elimination.H. sosnowskyi showed high (several orders of magnitude higher than average taiga zone grasses) photosynthetic water use efficiency (6-7 μM CO2/μM H2O).Formation of H. sosnowskyi monostands occurs primarily in disturbed areas with relatively rich and well-moistened soils.

View Article: PubMed Central - PubMed

Affiliation: Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, Komi Republic, Russia.

ABSTRACT
The ability of giant hogweeds to form monodominant communities and even pure monostands in invaded areas has been well documented. Understanding of the mechanisms leading to monostand formation can aid in determining the limitations of existing community ecology models and establishing an effective management plan for invasive species elimination. The aim of this observational study was to investigate traits of Heracleum sosnowskyi plants (demography, canopy structure, morphology and physiology) of the plants in a pure stand in an invaded area useful for understanding potential monostand formation mechanisms. All measurements were performed in one typical Heracleum sosnowskyi monostand located in an abandoned agriculture field located in Syktyvkar city suburb (North-east Russia). This monostand consisted of five main plant growth stages: seed, seedling, juvenile, vegetative adult, and generative adult. Plants of all stages began to grow simultaneously shortly after the snowmelt, at the same time as spring ephemeral plant species grew. The density of generative plants did not change during the vegetation period, but the density of the other plant stages rapidly decreased after the formation of a tall (up to 2-2.5 m) and dense (Leaf area index up to 6.5) canopy. The canopy captured approximately 97% of the light. H. sosnowskyi showed high (several orders of magnitude higher than average taiga zone grasses) photosynthetic water use efficiency (6-7 μM CO2/μM H2O). Formation of H. sosnowskyi monostands occurs primarily in disturbed areas with relatively rich and well-moistened soils. Early commencement of growth, rapid formation of a dense canopy, high efficiency of light and water use during photosynthesis, ability of young plants to survive in low light conditions, rapid recovery of above-ground plant parts after damage, and the high density of the soil seed bank are the most important traits of H. sosnowskyi plants for monostand formation in invaded areas.

Show MeSH
Related in: MedlinePlus