INVESTIGADORES
BALSEIRO Esteban Gabriel
artículos
Título:
Alien vs. native plants in a Patagonian wetland: elemental
Autor/es:
CUASSOLO, F.; BALSEIRO, E.G.; MODENUTTI, B.E.
Revista:
BIOLOGICAL INVASIONS
Editorial:
SPRINGER
Referencias:
Año: 2012 vol. 14 p. 178 - 189
ISSN:
1387-3547
Resumen:
Wetlands are subject to invasion by exotic
plant species, especially during the dry season when
they resemble terrestrial systems; therefore, terrestrial
plants could exploit this situation to colonize this
environment. We analyzed P. anserina invading
Patagonian wetlands in terms of elemental ratios that
would modify wetland stoichiometry due to organic
matter inputs. We studied the elemental relationship
(carbon/nitrogen/phosphorus) of P. anserina in comparison
with native emergent macrophytes (Eleocharis
pachicarpa and Carex aematorrhyncha). These
plant species are common and dominant in the
wetland. Additionally, we analyzed the presence of
mycorrhizal fungi in the roots and their proportion of
root infection. Our study reveals that the invasive
species presented nutrient (especially phosphorus)
allocation in roots and differences in mycorrhizal
infection, with a predominance of arbuscular mycorrhiza,
compared with native species. During flooded
periods with the decay of aerial parts, P. anserina
P. anserina invading
Patagonian wetlands in terms of elemental ratios that
would modify wetland stoichiometry due to organic
matter inputs. We studied the elemental relationship
(carbon/nitrogen/phosphorus) of P. anserina in comparison
with native emergent macrophytes (Eleocharis
pachicarpa and Carex aematorrhyncha). These
plant species are common and dominant in the
wetland. Additionally, we analyzed the presence of
mycorrhizal fungi in the roots and their proportion of
root infection. Our study reveals that the invasive
species presented nutrient (especially phosphorus)
allocation in roots and differences in mycorrhizal
infection, with a predominance of arbuscular mycorrhiza,
compared with native species. During flooded
periods with the decay of aerial parts, P. anserina
P. anserina in comparison
with native emergent macrophytes (Eleocharis
pachicarpa and Carex aematorrhyncha). These
plant species are common and dominant in the
wetland. Additionally, we analyzed the presence of
mycorrhizal fungi in the roots and their proportion of
root infection. Our study reveals that the invasive
species presented nutrient (especially phosphorus)
allocation in roots and differences in mycorrhizal
infection, with a predominance of arbuscular mycorrhiza,
compared with native species. During flooded
periods with the decay of aerial parts, P. anserina
Eleocharis
pachicarpa and Carex aematorrhyncha). These
plant species are common and dominant in the
wetland. Additionally, we analyzed the presence of
mycorrhizal fungi in the roots and their proportion of
root infection. Our study reveals that the invasive
species presented nutrient (especially phosphorus)
allocation in roots and differences in mycorrhizal
infection, with a predominance of arbuscular mycorrhiza,
compared with native species. During flooded
periods with the decay of aerial parts, P. anserina
and Carex aematorrhyncha). These
plant species are common and dominant in the
wetland. Additionally, we analyzed the presence of
mycorrhizal fungi in the roots and their proportion of
root infection. Our study reveals that the invasive
species presented nutrient (especially phosphorus)
allocation in roots and differences in mycorrhizal
infection, with a predominance of arbuscular mycorrhiza,
compared with native species. During flooded
periods with the decay of aerial parts, P. anserinaP. anserina
stores phosphorus in the roots and releases dissolved
organic matter of high molecular weight molecules,
high color, and a high C-to-nutrient ratio in comparison
with native macrophytes. These results show the
strategy of an invasive terrestrial plant in temporary
aquatic systems, and how the elemental relationships
of the invasive plant can modify the stoichiometry of
the environment.