Effects of Different Rates and Methods of Leaf Area Removal on Rain Forest Seedlings of Coachwood (Ceratopetalum apetalum)

Lowman, M. D.

doi:10.1071/bt9820477

Cited by 41 publications

(29 citation statements)

References 16 publications

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“…SEEDLING HERBIVORY Coley et al (1985) proposed that slower growing species would be bet ter defended and have lower herbivory rates than faster growing species. The species in this study are slow growing and their seedling herbivory rates, espe cially for Peltogyne, are relatively low when compared with those of other tree species (Lowman, 1982;Coley, 1983a,b;Lowman, 1984;Marquis, 1987;Nascimento & Hay, 1993). However, as found by Coley (1983b), Marquis (1984) and Nascimento & Hay (1993), variation between plants at any one sample period is high, and rates of damage to a particular indi vidual are not constant.…”

Section: Herbivory In Peltogyne Seedling Recruitsmentioning

confidence: 77%

Leaf herbivory on three tree species in a monodominant and two other Terra firme forests on Maracá Island, Brazil

Nascimento

Proctor

2001

Acta Amaz.

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-The aim of this study was to test the hypothesis that the monodominant nonpioneer Peltogyne gracilipes, typically does not suffer density-dependent herbivory (JanzenConnell model). Two components of intraspecific variation in leaf herbivory were measured: 1) the variation between individuals in the population at the same time and 2) the temporal Brazil in three plots (50 m χ 50 m) in each of three forest types: Peltogyne-rich forest (PRF), Peltogyne-poor forest (PPF), and forest without Peltogyne (FWP). Two other non-pioneer species dominant partly due to escape from herbivory in the early stages of its life although it may Key words: Amazonia, density-dependent herbivory, monodominant forest, Peltogyne, terra firme forest Herbivoria Foliar em Três Espécies Arbóreas em Uma Floresta Monodominante e Duas Outras Floresta de Terra Firme na Ilha de Maracá, Brasil.RESUMO -O objetivo deste trabalho foi testar a hipótese de que Peltogyne gracilipes, espécie climax e monodominante, tipicamente não sofre herbivoria dependente da densidade (Modelo de Janzen-Connell). Dois componentes da variação intraespecífica na herbivoria foliar foram avaliados: 1) a variação entre indivíduos na população no mesmo tempo e 2) a variação temporal na taxa de danos em cada indivíduo. O estudo foi realizado na Ilha de Maracá, Roraima, Brasil em três parcelas de 50 m χ 50 m em cada um dos três tipos florestais (Floresta rica em Peltogyne, PRF; Floresta pobre em Peltogyne, PPF e Floresta sem Peltogyne, FWP). Duas outras espécies não pioneiras (Ecclinusa guianensis e Pradosia surinamensis) foram escolhidas para comparações por serem abundantes nas diferentes classes de tamanho e suas plântulas de fácil identificação no campo. A percentagem de área foliar removida pelos herbívoros está entre os valores reportados para outras espécies arbóreas tropicais (2-16%). Não houve diferenças dentro das espécies entre florestas. Entretanto, existiu uma diferença significativa entre espécies. As plântulas de Peltogyne não apresentaram nenhuma evidência de herbivoria dependente da densidade como previsto pelo modelo de Janzen-Connell, embora para árvores adultas tenha sido observado a ocorrência de desfolhamento em massa em abril de 1992. Este resultado sugere que Peltogyne pode ser dominante parcialmente devido ao escape da herbivoria nos estágios iniciais de sua vida embora possa sofrer ocasionais desfolhamentos quando adulta.Palavras-chave: Amazônia, herbivoria dependente da densidade, floresta monodominante, Peltogyne, floresta de terra firme

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Section: Herbivory In Peltogyne Seedling Recruitsmentioning

confidence: 77%

Leaf herbivory on three tree species in a monodominant and two other Terra firme forests on Maracá Island, Brazil

Nascimento

Proctor

2001

Acta Amaz.

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“…The distribution of vascular connections can affect the distribution of nutrients, sugars, wound-induced signals, hormones, and other chemicals (Watson and Casper 1984). A number of authors have examined this effect and have found that concentrated effects are more detrimental than dispersed effects (Lowman 1982;Marshall 1989;Marquis 1992;Price and Hutchings 1992;Mauricio et al 1993), although some others have shown no clear effect (e.g., Garrish and Lee 1989;Shea and Watson 1989;Avila-Sakar et al 2003;Avila-Sakar and Stephenson 2006). Where an effect has been found, it has been ascribed to sectoriality.…”

Section: Discussionmentioning

confidence: 99%

Leaf compensatory growth as a tolerance strategy to resist herbivory in Pancratium sickenbergeri

2007

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We examined the effects of leaf herbivory by the dorcas gazelle, Gazella dorcas, on the compensatory growth of the geophyte Pancratium sickenbergeri (Amaryllidaceae) in the Negev desert, Israel. In three populations exposed to different levels of herbivory, we removed different amounts of photosynthetic leaf area from plants in five clipping treatments: 0, 25, 50%-dispersed over all leaves, 50%-entire area of half the leaves, 100%. The population with the lowest level of herbivory showed the lowest relative regrowth rate after clipping. In the population with a constantly high level of herbivory, plants in intermediate-clipping treatments overcompensated in leaf area after clipping. For all the populations, clipped plants produce more new leaves than unclipped plants. In the population with the highest level of herbivory, clipping treatments did not have a significant effect on the number of fruits per plant. In addition, we did not find a trade-off between investments in growth and reproduction in this population. Our results indicated that, in the desert lily, herbivores may select for plant mechanisms that compensate after damage as a tolerant strategy to maintain fitness.

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“…Foliar herbivory, based on defoliation methods (Becker 1983, Howe 1990, Lee & Bazzaz 1980, Lowman 1982, Marquis 1984, Reed & Stephenson 1972, Rockwood 1973 or by insecticide treatment methods (Crawley 1985, Gance et al 1989, Kinsman & Platt 1984, Louda 1984) may negatively affect plant growth, reproduction and survival, and in so doing, plant fitness.…”

Section: Discussionmentioning

confidence: 99%

The impact of simulated folivory on juveniles ofMetrodorea pubescens(Rutaceae) in a gallery forest near Brasília, Federal District, Brazil

Nascimento

Hay

1994

J. Trop. Ecol.

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A field experiment was conducted to test the effects of simulated folivory on leaf production, plant growth rate and mortality of small individuals of Metrodorea pubescens in an evergreen gallery forest in central Brazil. Although complete defoliation decreased annual growth rate, both in absolute and relative values, it also stimulated leaf production. Mortality was observed only in individuals in the smallest size class, but was not statistically related to percentage defoliation. Recovery of completely defoliated individuals was rapid and after one year over 70% of their initial number of leaves was present. It is probable that insect folivory is not a direct cause of mortality of juveniles of this species.

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Effects of Different Rates and Methods of Leaf Area Removal on Rain Forest Seedlings of Coachwood (Ceratopetalum apetalum)

Cited by 41 publications

References 16 publications

Leaf herbivory on three tree species in a monodominant and two other Terra firme forests on Maracá Island, Brazil

Leaf herbivory on three tree species in a monodominant and two other Terra firme forests on Maracá Island, Brazil

Leaf compensatory growth as a tolerance strategy to resist herbivory in Pancratium sickenbergeri

The impact of simulated folivory on juveniles ofMetrodorea pubescens(Rutaceae) in a gallery forest near Brasília, Federal District, Brazil

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