Topographic Shelter and Conifer Establishment and Mortality in an Alpine Environment, Glacier National Park, Montana

Resler, Lynn M.; Butler, David; Malanson, George P.

doi:10.2747/0272-3646.26.2.112

Cited by 111 publications

(121 citation statements)

References 40 publications

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“…The presence of abiotic shelter elements can potentially provide safe microsite conditions for recruitment, without producing competition dynamics with the seedlings. Nurse objects can enhance both seedling establishment and survival (Coop and Schoettle, 2009;Resler et al, 2005;Castro et al, 2011). They can efficiently act as traps for wind-dispersed seed, and provide shading, resulting in reduced evaporation and higher soil moisture (Flores and Jurado, 2003;Carlucci et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…This is particularly evident in climatically stressed sites, where seedlings establishment is strongly limited by harsh conditions. Mature plants, shrubs, deadwood or rocks can play a positive role in ameliorating microsites along with surface microtopography (Castro et al, 2002;Resler et al, 2005;Franzese et al, 2009;Beghin et al, 2010;Legras et al, 2010). Especially in water stressed/limited environment these elements can reduce soil temperature (shading effect) and wind (less transpiration), and increase relative humidity (Flores and Jurado, 2003;Castro et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Deadwood anisotropic facilitation on seedling establishment after a stand-replacing wildfire in Aosta Valley (NW Italy)

Marzano

Garbarino

Marcolin

et al. 2013

Ecological Engineering

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deadwood anisotropic facilitation on seedling establishment after a stand-replacing wildfire in Aosta Valley (NW Italy)

Marzano

Garbarino

Marcolin

et al. 2013

Ecological Engineering

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“…A continuidade dos estudos envolvendo processos de facilitação em ambientes com severidade ambiental é necessária, assim como reconsiderações sobre a importância relativa de associações com nurse plants e nurse objects em cactos globulares, uma vez que estas associações são na grande maioria das vezes facultativas (Brooker et al 2008, Munguía-Rosas & Sosa 2008, Peters et al 2008 e, em contraste com a associação nurse plant, os microambientes não competem por recursos (Resler et al 2005).…”

Section: Discussionunclassified

Dinâmica espaço-temporal de Melocactus ernestii subsp. ernestii (Cactaceae) no Nordeste do Brasil

Hughes¹,

Cruz²,

Romão³

et al. 2011

Rev. bras. Bot.

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-(Spatio-temporal dynamics of Melocactus ernestii subsp. ernestii (Cactaceae) in northwestern Brazil): Melocactus ernestii Vaupel ssp. ernestii occurs in discontinuous outcrops in eastern Brazil. We investigated the spatio-temporal pattern of mortality events and survival of seedlings of M. ernestii relationship with plants and perennials, from the use of plots, assigned with the aid of measuring tapes, which were taken the Cartesian coordinates of the centroid of the stages of development, with subsequent analysis of point patterns based on Ripley's K function. Were mapped in plots 686 individuals of M. ernestii. The spatial pattern varied depending on the scale of the development stage and degree of weathering of the outcrops. The recruitment events and mortality were spatially structured and influenced by seasonal pulses of rainfall. Seedlings emerged ca. 50 cm from the centroid of adults. From the 136 seedlings monitored for 18 months, 84% died. The results showed that microsites initially effective in the maintenance of seed germination may not be effective in the establishment of seedlings. The magnitude of biotic interactions in stressful environments is species-specific and indicates that a positive association between adult plants and seedling survival is not consistent over time. This type of modeling population allows a better understanding of the role of positive and negative interactions as forces community structure, and may help to understand the complexity of biotic interactions in severe environmental gradients.Key words -independent labeling model, recruitment, Ripley's K function, spatial structure RESUMO -(Dinâmica espaço-temporal de Melocactus ernestii subsp. ernestii (Cactaceae) no Nordeste do Brasil) Melocactus ernestii Vaupel subsp. ernestii ocorre em afloramentos rochosos descontínuos no leste do Brasil. O presente estudo investigou o padrão espaço-temporal dos eventos de mortalidade e sobrevivência de plântulas da M. ernestii e a relação com as plantas perenes, a partir da utilização de parcelas, alocadas com auxílio de trenas, onde foram tomadas as coordenadas cartesianas do centróide dos estádios de desenvolvimento, com posterior análises de padrões de ponto baseado na função K de Ripley. Foram mapeados nas parcelas 686 indivíduos da M. ernestii. O padrão espacial variou em função da escala, do estádio de desenvolvimento e do grau de intemperização dos afloramentos. Os eventos de recrutamento e mortalidade foram espacialmente estruturados e influenciados por pulsos de precipitação sazonais. As plântulas emergiram a ca. 50 cm do centróide dos adultos. Das 136 plântulas monitoradas em 18 meses, 84% morreram. Os resultados mostraram que microsítios inicialmente eficazes na manutenção de sementes e promotores da germinação não necessariamente podem ser eficazes para o estabelecimento das plântulas. A magnitude das interações bióticas em ambientes estressantes é espécie-específica e indica que associação positiva entre plantas adultas e sobrevivência de plântulas não é consistente...

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“…Whitebark pine seedlings can escape from competition by occupying more harsh, open environments where competing conifers struggle to survive (Callaway et al, 2002;Maher and Germino, 2006). However, seedlings in open environments still benefit from the presence of vegetation or objects that may provide shelter, helping to alleviate water stress induced by high winds or solar insolation (Tomback et al, 1993;Mellman-Brown, 2005;Resler et al, 2005;Izlar, 2007;McCaughey et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Regeneration Niche of Whitebark Pine in the Canadian Rocky Mountains: The Basis to Restoring an Endangered Species

Gelderman¹,

Macdonald

Gould

2016

Arctic, Antarctic, and Alpine Research

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Topographic Shelter and Conifer Establishment and Mortality in an Alpine Environment, Glacier National Park, Montana

Cited by 111 publications

References 40 publications

Deadwood anisotropic facilitation on seedling establishment after a stand-replacing wildfire in Aosta Valley (NW Italy)

Deadwood anisotropic facilitation on seedling establishment after a stand-replacing wildfire in Aosta Valley (NW Italy)

Dinâmica espaço-temporal de Melocactus ernestii subsp. ernestii (Cactaceae) no Nordeste do Brasil

Regeneration Niche of Whitebark Pine in the Canadian Rocky Mountains: The Basis to Restoring an Endangered Species

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