Plantas introducidas en el Parque Nacional Torres del Paine, Chile

Gayana - Botanica (Impact Factor: 0.26). 12/2006; DOI: 10.4067/S0717-66432006000200001
Source: OAI

ABSTRACT Se presentan 61 nuevos registros de plantas introducidas para el Parque Nacional Torres del Paine (49°21’-51°08’S y 73°07’-74°52’O), región de Magallanes, con una superficie de 181.414 ha. Se encontraron 85 especies introducidas, pertenecientes a 21 familias y 65 géneros. Las familias mejor representadas en número de especies fueron Poaceae (22 spp.), Asteraceae (11 ssp.) y Caryophyllaceae (7 ssp.). Las hierbas perennes constituyen el 52% y las anuales el 34% de la flora. El 88% de ellas son de origen europeo y el 36% corresponde a especies invasoras.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Central Chile supports a rich native fora and a high proportion of alien, naturalized plants. To increase our knowledge about behavior of naturalized plants in central Chile, the fora of the western slope of the Coastal Range (Province Valparaiso, 33°S lat.), was recorded and analyzed. Study sites were placed at natural and anthropic, perturbed areas. Taxonomic richness, species composition, geographic origin, Raunkiaer’s life forms, and absolute coverage were recorded. Of the 325 vascular plant species were identifed, 110 (34%) were considered alien; 74% of them with European origin, and 10%, European-North African. According to abundance, 27 % of the plant coverage was of native species and 73% of non-natives. The natives were distributed in 68 families and the naturalized and cultivated in 28 families. Asteraceae, Poaceae y Fabaceae were the richest in both native and naturalized species. The native species were distributed in 146 genera and non natives in 89. Alstroemeria, Baccharis and Calceolaria were the richest in native species; Erodium, Trifolium, Rumex and Vicia, were rich in alien species. Hemicryptophytes and therophytes were most abundant in natives and naturalized species. We conclude that due to increasing urban and agricultural pressures on soils in Province Valparaíso, it is expected that short-lived alien species with opportunistic, high-reproductive capacity, will increase in diversity and abundance.
    Gayana - Botanica 12/2009; 67(1). DOI:10.4067/S0717-66432010000100004 · 0.26 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Bromus tectorum (cheatgrass) is an aggressive invasive species posing threats to native ecosystems including increase in fire frequency, alteration of water and nutrient cycles and exclusion of native species. As such, it is important to monitor this species worldwide. However, outside the United States, it has been poorly studied. We studied this species at two scales: (i) at a local scale, evaluating the species presence and its determinants, along the ecotonal area between the steppe and the forest within north-western Patagonia, to reveal whether B. tectorum is actually invading nat-ural ecosystems in areas comparable with those invaded in USA, and (ii) at a regional scale, through a search of literature and herbaria databases on B. tecto-rum in South America, to determine the current known distribution of the species in this subcontinent. Results indicate that it is already invading north-western Pata-gonia in Argentina, mainly in the semi-arid part of the region, and that precipitation influences the invasion process. We found that for South America, B. tecto-rum has been only documented in southern Argentina and Chile. Given the similarities to other invaded regions, the possibility of invasion for Patagonia has been predicted but not prevented. It is important to study changes in the invasion level where it is already established, and to encourage managers with preven-tion and control strategies. Combining this informa-tion with lessons from places with extensive periods of invasion could help to initiate management of the spe-cies in areas where the invasion process is beginning and before the species spreads widely.
    Weed Research 08/2013; DOI:10.1111/wre.12047 · 2.02 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Lupines (Lupinus species; Fabaceae) are an ancient crop with great potential to be developed further for high-protein feed and food, cover crops, and phytoremediation. Being legumes, they are capable of symbiotically fixing atmospheric nitrogen. However, Lupinus species appear to be nonmycorrhizal or weakly mycorrhizal at most; instead some produce cluster roots, which release vast amounts of phosphate-mobilizing carboxylates (inorganic anions). Other lupines produce cluster-like roots, which function in a similar manner, and some release large amounts of carboxylates without specialized roots. These traits associated with nutrient acquisition make lupines ideally suited for either impoverished soils or soils with large amounts of phosphorus that is poorly available for most plants, e.g., acidic or alkaline soils. Here we explore how common the nonmycorrhizal phosphorus-acquisition strategy based on exudation of carboxylates is in the genus Lupinus, concluding it is very likely more widespread than generally acknowledged. This trait may partly account for the role of lupines as pioneers or invasive species, but also makes them suitable crop plants while we reach "peak phosphorus".
    American Journal of Botany 01/2013; 100(2). DOI:10.3732/ajb.1200474 · 2.46 Impact Factor

Full-text (2 Sources)

Available from
Jun 1, 2014