Invasion of Pinus halepensis Mill. following a wildfire in an Argentine grassland nature reserve

Zalba, Sergio Martín; Cuevas, Yannina Andrea; Bóo, Roberto M.

doi:10.1016/j.jenvman.2007.03.018

Cited by 52 publications

(42 citation statements)

References 33 publications

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“…Na Estação Ecológica de Avaré, o capim-sapé ocupa áreas relativamente extensas de fisionomias campestres formando densos agrupamentos (Figura 13). Algumas espécies do gênero Pinus estão entre as que apresentam maior potencial de invasão de ambientes naturais (Zalba et al, 2008). Características como a dispersão das sementes pelo vento, crescimento rápido, alta produtividade de sementes e ciclo de manejo longo estão associadas ao sucesso das invasões biológicas dessas espécies no hemisfério Sul (Higgins e Richardson, 1998).…”

Section: Família/espécieunclassified

A vegetação da Estação Ecológica de Avaré: subsídios para o plano de manejo

Filho¹,

Baitello²,

Arzolla³

et al. 2015

IF Série Registros

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; Léo ZIMBACK 2 RESUMO -A Estação Ecológica de Avaré é uma unidade de conservação com 720,4 ha localizada no município de Avaré, sudoeste do Estado de São Paulo. O presente trabalho apresenta os resultados dos estudos sobre o tema vegetação elaborados para o seu Plano de Manejo. Com base na análise de dados primários e secundários e de fotografias aéreas, a cobertura vegetal foi caracterizada e uma proposta de zoneamento foi elaborada. Dados primários e secundários totalizaram 265 espécies de plantas vasculares, cinco delas apresentado algum grau de ameaça de extinção: Anemopaegma arvense, Cedrela fissilis, Clitoria densiflora, Machaerium villosum e Rourea pseudospadicea. Foram identificadas cinco formações vegetais, sendo três pertencentes ao bioma Cerrado e duas pertencentes ao bioma Mata Atlântica compreendendo, respectivamente, 72,17% e 24,63% da área da Estação. Entre as fisionomias de Cerrado, destaque pode ser dado às savânicas e campestres, que juntas ocupam 49,91% da Estação, acentuando a sua significância devido à representatividade relativamente elevada do componente não arbóreo do Cerrado nessas fisionomias, o qual é tido como o mais rico em espécies vegetais no bioma. Três espécies invasoras foram amostradas, o pinus (Pinus sp.), o capim-gordura (Melinis minutiflora) e a braquiária (Urochloa brizantha), sendo esta última a que representa maior ameaça para a diversidade florística da Unidade. Na proposta de zoneamento preliminar, a Zona de Recuperação foi a mais expressiva, totalizando 84,81% da área total da Unidade, onde o manejo enfatiza o controle de gramíneas invasoras.Palavras-chave: Cerrado; Mata Atlântica; unidade de conservação; zoneamento.ABSTRACT -Avaré Ecological Station is a protected area with 720.4 ha located in the municipality of Avaré, southwestern São Paulo state. This study presents the results of the vegetation survey made for its Management Plan. Based on primary and secondary data and on aereal photographs analysis, the vegetation cover was characterized and a zoning proposal was elaborated. Primary and secondary data totaled 265 vascular plant species, of which five presented some degree of extinction risk: Anemopaegma arvense, Cedrela fissilis, Clitoria densiflora, Machaerium villosum and Rourea pseudospadicea. Five plant formations were identified, three belonging to the Brazilian Savanna biome and two belonging to the Atlantic Forest biome occupying, respectively, 72.17% e 24.63% of the Station area. Among the Savanna physiognomies, highlight can be given to the grassland type ones, which occupied 49.91% of the Station, reinforcing its significance due to relatively height representativeness of the non-arboreal component in these physiognomies, which is considered as the richest component in plant species in the biome. Three invading species were sampled, the pine (Pinus sp.) and the grasses Melinis minutiflora and Urochloa brizantha, being the last the uppermost threat for the floristic diversity of the area. In the preliminary zoning the Recuperation Zone was the most exp...

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Section: Família/espécieunclassified

A vegetação da Estação Ecológica de Avaré: subsídios para o plano de manejo

Filho¹,

Baitello²,

Arzolla³

et al. 2015

IF Série Registros

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“…C. Lawson y Pinus halepensis Mill.) (Núñez y Raffaele 2007, Zalba et al 2008. El éxito de establecimiento del género Pinus tras incendios forestales se debe a que algunas especies (e.g.…”

Section: Introductionunclassified

Efecto de la alta temperatura en la germinación y supervivencia de semillas de la especie invasora Pinus contorta y dos especies nativas del sur de Chile

et al. 2015

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Efecto de la alta temperatura en la germinación y supervivencia de semillas de la especie invasora Pinus contorta y dos especies nativas del sur de Chile Effects of high temperatures in the germination and seed survival of the invasive species Pinus contorta and two native species of South Chile In order to comprehend the regeneration response to post-fire, it is necessary to know the response and tolerance of the seeds to high temperatures. Seeds of P. contorta, A. araucana and N. antarctica were sown in pots with sand and subsequently heated at 80, 100 and 120 °C for five minutes. Germination and seedling survival tests were carried out in a greenhouse. Germination in N. antarctica was null.Heat treatments did not have a negative effect on the germination of P. contorta, but they did on A. araucana inhibiting the germination at temperatures over 100 °C. These results suggest that when undergoing a fire of high intensity, P. contorta has a competitive advantage over A. araucana and N. antarctica; the seed bank would have more possibilities to survive the effects of a wildfire.Key words: Araucaria araucana, Nothofagus antarctica, wildfire, fire ecology, heat shock. RESUMENEstudios en Sudamérica han reportado aumentos en la invasividad de Pinus spp. después de eventos de fuego. Esto se debe a adaptaciones morfológicas y fisiológicas a incendios que presentan algunas especies de este género. Pinus contorta es uno de los pinos más invasores en ecosistemas templados y se encuentra invadiendo los bosques de Araucaria araucana y Nothofagus antarctica en la Reserva Nacional Malalcahuello, Chile. Para comprender la respuesta potencial de la regeneración post-incendios en árboles, es necesario conocer la respuesta y tolerancia de la semilla a altas temperaturas. Semillas de P. contorta, A. araucana y N. antarctica fueron sembradas en bandejas con arena y sometidas a 80, 100 y 120 °C por cinco minutos, después fueron llevadas al invernadero para evaluar la germinación y supervivencia de las plántulas. La germinación para N. antarctica fue nula incluso en el control. Las altas temperaturas no presentaron efectos negativos en la germinación de P. contorta, pero sí en A. araucana inhibiendo la germinación a temperaturas mayores a 100 °C. Estos resultados sugieren que, en incendios de alta intensidad, las semillas de P. contorta tiene una ventaja competitiva sobre A. araucana y N. antarctica, ya que el banco de semillas tendrá mayores posibilidades de sobrevivir ante un incendio forestal.Palabras clave: Araucaria araucana, Nothofagus antarctica, incendio forestal, ecología del fuego, choque térmico.

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“…Pseudotsuga menziesii invades abandoned fields (Simberloff et al 2002) and scrub vegetation (Sarasola et al 2006) in Argentinean Patagonia. Pinus radiata invades deciduous N. alessandri forest in Chile (Bustamante & Castor 1998) and grasslands in Buenos Aires province, where P. halepensis also is spreading over relictual areas of native grassland (Zalba & Villamil 2002;Zalba et al 2008). In Brazil, P. taeda and P. elliottii invade natural grasslands, wetlands and degraded forest (Ziller & Galvão 2002;Zanchetta & Diniz 2006).…”

Section: Observed Impacts Of South American Conifer Introductionsmentioning

confidence: 99%

“…Burned plantations interfere with post-fire succession to the original matorral vegetation (Nuñez & Raffaele 2007;Cuevas & Zalba 2009). Invasive pines in native pampas grasslands have also been associated with high intensity fires that, in turn, promote the dispersal of these same pine species (Zalba et al 2008) A few South American studies have shown impacts of introduced conifers on biodiversity, in either plantations or invaded areas. In small mixed plantations of Pseudotsuga menziesii, P. radiata and P. sylvestris embedded in forests dominated by N. dombeyi in northwest Patagonia, Paritsis and Aizen (2008) found decreased species richness of understory vascular plants, epigeal beetles and birds, with a loss of rare and specialist species and an increase in introduced plant species aside from these three conifers.…”

Section: Observed Impacts Of South American Conifer Introductionsmentioning

confidence: 99%

Spread and impact of introduced conifers in South America: Lessons from other southern hemisphere regions

Simberloff¹,

et al. 2010

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The history of conifers introduced earlier elsewhere in the southern hemisphere suggests that recent invasions in Argentina, Brazil, Chile and Uruguay are likely to increase in number and size. In South Africa, New Zealand and Australia, early ornamental introductions and small forestry plantations did not lead to large-scale invasions, while subsequent large plantations were followed with a lag of about 20-30 years by troublesome invasions. Large-scale conifer plantation forestry in South America began about 50-80 years later than in South Africa, Australia and New Zealand, while reports of invasions in South America lagged behind those in the latter nations by a century. Impacts of invading non-native conifers outside South America are varied and include replacement of grassland and shrubland by conifer forest, alteration of fire and hydrological regimes, modification of soil nutrients, and changes in aboveground and belowground biotic communities. Several of these effects have already been detected in various parts of South America undergoing conifer invasion. The sheer amount of area planted in conifers is already very large in Chile and growing rapidly in Argentina and Brazil. This mass of reproductive trees, in turn, produces an enormous propagule pressure that may accelerate ongoing invasions and spark new ones at an increasing rate. Regulations to control conifer invasions, including measures to mitigate spread, were belatedly implemented in New Zealand and South Africa, as well as in certain Australian states, inspired by observations on invasions in those nations. Regulations in South America are weaker and piecemeal, but the existing research base on conifer invasions elsewhere could be useful in fashioning effective regulations in South America. Pressure from foreign customers in South Africa has led most companies there to seek certification through the Forestry Stewardship Council; a similar programme operates in Australia. Such an approach may be promising in South America.a ec_2058 489..504

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Invasion of Pinus halepensis Mill. following a wildfire in an Argentine grassland nature reserve

Cited by 52 publications

References 33 publications

A vegetação da Estação Ecológica de Avaré: subsídios para o plano de manejo

A vegetação da Estação Ecológica de Avaré: subsídios para o plano de manejo

Efecto de la alta temperatura en la germinación y supervivencia de semillas de la especie invasora Pinus contorta y dos especies nativas del sur de Chile

Spread and impact of introduced conifers in South America: Lessons from other southern hemisphere regions

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