Facilitation and Succession under the Canopy of a Leguminous Shrub, Retama sphaerocarpa, in a Semi-Arid Environment in South-East Spain

Pugnaire, Francisco I.; Haase, Peter; Puigdefábregas, Juan; Cueto, Milbis; Clark, Simon; Incoll, L. D.

doi:10.2307/3546339

Cited by 307 publications

(310 citation statements)

References 56 publications

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“…However, the regression showed that native richness was high in areas with low average precipitation, wind, and N deposition, while exotic grass and forb cover were reduced in these areas. In arid regions, total production is driven by precipitation (Noy-Meir 1973) but native diversity is often greater in areas with lower resource availability (Shmida and Whittaker 1981;Gutierrez et al 1993;Pugnaire et al 1996). These findings of higher diversity in resource poor areas coupled with the studies demonstrating the high-resource needs of the exotic grasses in our region (DeFalco et al 2003;Salo et al 2005) support our findings of higher native diversity on the drier, N-poor end of the gradient and higher exotic species cover on the wetter, N-rich end of the gradient.…”

Section: Factors Influencing Native Diversity and Exotic Covermentioning

confidence: 99%

Effects of natural and anthropogenic gradients on native and exotic winter annuals in a southern California Desert

2011

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Native annual plant species constitute a large proportion of the plant diversity found in arid vegetation types within the southwestern United States; yet, little is known about controls on diversity patterns along natural and anthropogenic gradients. In this study we evaluated native species richness and exotic species cover across overlapping gradients of precipitation, wind, and N deposition in the Colorado Desert of southern California. Factors allowing native diversity to persist under high N deposition and high wind were also evaluated in a second, focused study at one end of the gradient. We found that gradients in precipitation, nitrogen deposition, and wind were the most important factors to native richness and exotic species cover across the landscape, while local heterogeneity in bare ground influenced richness and cover at the high deposition/windy, or highdisturbance, end of the gradient. Patterns of native diversity were evaluated across the gradients using non-metric multidimensional scaling, which showed diversity was split into two axes: one strongly correlated to precipitation and the other strongly correlated with disturbance factors. The disturbance factors were also positively associated with exotic grass and forb cover. In total, these results indicate that large-scale patterns in disturbance and exotic species cover negatively affect native annual plant species diversity but native species can also persist due to local heterogeneity.

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Section: Factors Influencing Native Diversity and Exotic Covermentioning

confidence: 99%

Effects of natural and anthropogenic gradients on native and exotic winter annuals in a southern California Desert

2011

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“…Estas condições parecem enquadrar-se no processo clássico de facilitação indireta (sensu Callaway 1995), quando a presença de uma dada espécie aumenta a sobrevivência, crescimento ou valor adaptativo de outra. A possibilidade de novas associações entre A. arenaria e outras espécies traz um novo eixo explicativo que pode ser explorado em estudos de interações positivas (Alpert & Mooney 1996;Pugnaire et al 1996;Zaluar & Scarano 2001;Scarano 2002;Scarano et al 2004).…”

Section: Resultsunclassified

Regeneração e riqueza da formação arbustiva de Palmae em uma cronoseqüência pós-fogo na Restinga da Marambaia, Rio de Janeiro, RJ, Brasil

Menezes

Araújo

2004

Acta Bot. Bras.

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RESUMO -(Regeneração e riqueza da formação arbustiva de Palmae em uma cronoseqüência pós-fogo na Restinga da Marambaia, Rio de Janeiro, RJ, Brasil). A estrutura e a riqueza da formação arbustiva de Palmae foram analisadas em três sítios numa cronoseqüência de regeneração (3, 12 e 84 meses após a última queimada) na Restinga da Marambaia, registrando-se a presença de 29, 41 e 64 táxons, respectivamente. No sítio com maior tempo de regeneração, Allagoptera arenaria (Gomes) Kuntze representou 79% da dominância relativa (DoR), seguida das nanofanerófitas Inga maritima Benth. e Manilkara subsericea (Mart.) Dubard. Na área queimada há 12 meses, A. arenaria representou 88% da DoR, seguida de Inga maritima, Setaria setosa (Sw.) P. Beauv. e Paspalum arenarium Schrad. No sítio com três meses de regeneração, a DoR de A. arenaria foi de 82%, acompanhada de Clitoria sp., Inga maritima e Portulaca mucronata Link. Nos três sítios estudados, a forma de vida mais importante foi geófita rizomatosa, devido à dominância de A. arenaria. Caméfita herbácea escaposa foi a forma de vida que apresentou maior número de espécies nos sítios com três e 12 meses de regeneração e no sítio queimado há 84 meses, as nanofanerófitas acompanharam as caméfitas herbáceas escaposas em número de espécies. Das 29 espécies registradas no sítio com três meses de regeneração, só Portulaca mucronata e Sebastiania corniculata (Vahl) Müll. Arg. originaram-se a partir de sementes, sendo que as demais rebrotaram ou se regeneraram. Sete dias após a queimada A. arenaria apresentou, em média, 8cm de sua parte vegetativa regenerada e com 180 dias apresentou as primeiras inflorescências.Palavras-chave: sucessão secundária, rebrota, fogo, Allagoptera arenaria, restinga ABSTRACT -(The structure and diversity of three areas of shrubby restinga vegetation were analyzed 3, 12 and 84 months after fire in the Marambaia Restinga, Rio de Janeiro State, Brazil). A total of 29, 41 and 64 taxa, respectively, were found. In the area sampled 84 months after fire, relative dominance of Allagoptera arenaria (Gomes) Kuntze was 79%, followed by the nanophanerophytes Inga maritima Benth. and Manilkara subsericea (Mart.) Dubard. In the area sampled 12 months after fire, relative dominance of A. arenaria was 88%, followed by Inga maritima, Setaria setosa (Sw.) P. Beauv and Paspalum arenarium Schrad. In the area sampled three months after fire, relative dominance of A. arenaria was 82%; other important species were Clitoria sp., Inga maritima and Portulaca mucronata Link. Rhizome-geophytes dominated the life form spectra in the three areas due to A. arenaria dominance. The highest percentage of species in the areas sampled three and 12 months after fire belonged to the category scapose herbaceous chamaephytes. In the area sampled 84 months after fire, both nanophanerophytes and scapose herbaceous chamaephytes were dominant. Of the 29 species recorded in the area sampled three months after fire, only Portulaca mucronata and Sebastiania corniculata (Vahl) Müll. Arg. arose from seed; the ot...

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“…This can occur in a successional context (Clements, 1916) or in stable plant communities (Hunter and Aarssen, 1988). The facilitation of seedlings by established plants (Pugnaire et al, 1996;Eccles et al, 1999) is called nurse plant syndrome (Niering et al, 1967;Cavieres et al, 2008), which can occur either through biotic interactions or due to changes in the structural environment. Nurse plant syndrome has been most often identified in arid systems (Went, 1942) and is likely useful during ecosystem restoration (Gó mez-Aparicio et al, 2004).…”

Section: Negative Versus Positive Interactions With Neighborsmentioning

confidence: 99%

Negative Associations between Seedlings and Adult Plants in Two Alpine Plant Communities

Forbis

2009

Arctic, Antarctic, and Alpine Research

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Facilitation and Succession under the Canopy of a Leguminous Shrub, Retama sphaerocarpa, in a Semi-Arid Environment in South-East Spain

Cited by 307 publications

References 56 publications

Effects of natural and anthropogenic gradients on native and exotic winter annuals in a southern California Desert

Effects of natural and anthropogenic gradients on native and exotic winter annuals in a southern California Desert

Regeneração e riqueza da formação arbustiva de Palmae em uma cronoseqüência pós-fogo na Restinga da Marambaia, Rio de Janeiro, RJ, Brasil

Negative Associations between Seedlings and Adult Plants in Two Alpine Plant Communities

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