CONSTITUÍNTES QUÍMICOS DE Protium paniculatum(BURSERACEAE)

Zoghbi, Maria das Graças B.; Siqueira, Jane Beatriz G.; Wolter, E.; Júnior, Orlando Libório Pereira

doi:10.1590/1809-43921994242062

Cited by 1 publication

(1 citation statement)

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“…The consequence of herbivory on the opportunity cost for the plant will depend not only on the amount of biomass removed by herbivores, but also on the rate at which this biomass can be replaced (Coley 1987, Cyr and Pace 1993, Cebrian and Duarte 1994. We therefore estimated an index of herbivore impact (HI) as the ratio Fine et al 2006, Zoghbi et al 1994, Ramos et al 2000, Siani et al 1999, Almeida et al 2002(9) DuBois andSneden 1996, Orphelin et al 1996. of herbivory rates and leaf production rates:…”

Section: Leaf Production and Herbivory Censusesmentioning

confidence: 99%

Herbivory, growth rates, and habitat specialization in tropical tree lineages: implications for Amazonian beta‐diversity

Lamarre

Baraloto

Fortunel

et al. 2012

Ecology

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Abstract. Tropical plant diversity is extraordinarily high at both local and regional scales. Many studies have demonstrated that natural enemies maintain local diversity via negative density dependence, but we know little about how natural enemies influence beta-diversity across habitats and/or regions. One way herbivores could influence plant beta-diversity is by driving allocation trade-offs that promote habitat specialization across resource gradients. We therefore predicted that increasing resource availability should be accompanied by increasing herbivory rates and decreasing plant allocation to defense. Second, relative abundances within plant lineages are predicted to reflect patterns of habitat specialization and allocation tradeoffs. A phylogenetic context is vital not only to compare homologous plant traits (including defense strategies) across habitat types, but also to connect evolutionary trade-offs to patterns of species diversification in each phylogenetic lineage.We tested these predictions for trees in white-sand, clay terra firme, and seasonally flooded forests in Peru and French Guiana that represent the range of soil fertility, forest structure, and floristic compositions found throughout the Amazon region. We established 74 0.5-ha plots in these habitats and sampled all trees. Within 12 representative plots we marked newly expanding leaves of 394 saplings representing 68 species, including the most abundant species in each plot in addition to species from five focal lineages: Swartzia and Inga (Fabaceae), Protieae (Burseracaeae), Bombacoideae (Malvaceae), and Micropholis (Sapotaceae). We measured total leaf production rates for each sapling and calculated relative herbivory impact as the ratio between herbivory rate and leaf production rate.Herbivory rates averaged 2.1% per month, did not correlate with leaf production rate, and were similar across habitats. Relative herbivore impacts exceeded leaf production rates for most species. Leaf production rate averaged 2.8%, was significantly higher in seasonally flooded forests than the other two habitats, and exhibited significant correlations with specific leaf area. Species with high herbivory rates exhibited significantly lower relative abundances in terra firme forests. Overall, focal species within lineages present contrasting patterns regarding their herbivory rates and leaf production rate within habitats. These results highlight why a lineage-based approach is necessary when attempting to connect hypotheses regarding evolutionary trade-offs to community assembly patterns.

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