Hurricane Impacts on Liana Populations in an Old-Growth Southeastern Bottomland Forest

Allen, Bruce P.; Pauley, Eric F.; Sharitz, Rebecca R.

doi:10.2307/2996596

Cited by 56 publications

(42 citation statements)

References 29 publications

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“…Other disturbances previous and subsequent to the hurricane have influenced abiotic conditions, albeit mostly at a smaller scale. Partial filling of different-sized canopy gaps and high vine cover on living trees (Allen et al 1997) and standing dead snags have reduced light availability. Countering canopy closure, background mortality that occurs between catastrophic disturbances (Lugo and Waide 1993) has continued to open the canopy in some areas (Battaglia, personal observation), and the environmental heterogeneity created by these interim events is superimposed on the patterns left by the original hurricane disturbance.…”

Section: Discussionmentioning

confidence: 99%

Responses of floodplain forest species to spatially condensed gradients: a test of the flood–shade tolerance tradeoff hypothesis

Battaglia

Sharitz

2005

Oecologia

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Previous work in southeastern US floodplains led to the hypothesis that a tradeoff between flood and shade tolerance underlies species-specific responses to flooding and light, which drive forest regeneration. In systems where community turnover can occur with small-scale environmental changes, testing this hypothesis requires recognizing that turnover of species along the two gradients can be large relative to the spatial distances involved. We test the tradeoff hypothesis in an old-growth bottomland hardwood forest by (1) comparing shade and moisture profiles of woody juveniles versus random points and (2) using individual-based sampling of woody juveniles to model probability of occurrence in response to distance-to-water table and canopy openness gradients. We found that juveniles of all species combined occupied a similar range of distance-to-water table compared to measurements taken at random points, but average canopy openness above seedlings was significantly higher than at random points. On average, shade-tolerant species, with the exception of Acer rubrum, were found in shaded areas that were also drier, whereas less shade-tolerant taxa, plus A. rubrum, were found in wetter, more open areas, suggesting a tradeoff between flood and shade tolerance. Predictive models of species occurrence, which incorporate the availability of canopy and microtopographic conditions, indicated that three taxa (Fraxinus pennsylvanica, Quercus spp., and Ulmus americana) had patterns consistent with a flood-shade tolerance tradeoff. In contrast, Asimina triloba, Celtis laevigata, and Liquidambar styraciflua had positive responses when the joint stresses of flooding and shade were diminished. A. rubrum appeared to be the most tolerant to both stresses. Our work not only lends support to the flood-shade tradeoff hypothesis but also indicates that a more general model is needed that includes a "flood-shade release" component. We also suggest that responses to small-scale gradients should not be overlooked, particularly in systems where the gradients are ecologically steep.

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Section: Discussionmentioning

confidence: 99%

Responses of floodplain forest species to spatially condensed gradients: a test of the flood–shade tolerance tradeoff hypothesis

Battaglia

Sharitz

2005

Oecologia

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“…These species are known to be prevalent in forested wetlands (Allen et al 1997), but no published studies could be found that compared species composition among bottomland forest of low order streams. Although Japanese honeysuckle (Lonicera japonica) was not very abundant in the 22 relatively unaltered sites we sampied, it occurred in 45% of the sites, ranging from present (P) to RD=7.5 (Table 3).…”

Section: Vegetation Of Floodplain Forestsmentioning

confidence: 99%

Forested wetlands of low order streams in the inner coastal plain of North Carolina, USA

Rheinhardt

Brinson

et al. 1998

Wetlands

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We quantified geomorphic and vegetational characteristics of 22 first-to-fourth order rivcrine forests located in the inner coastal plain of North Carolina. We used Detrended Correspondence Analysis to compare canopy composition among sites and relate measured environmental parameters to distribution of canopy trees and stream order. Both geomorphic and vegetational attributes could be used to functionally divide first-to-fourth order riverine systems into 17 headwater (first and second order streams) and 5 midreach systems (third and fourth order streams). As expected, stream order was found to be positively correlated (P<0.003) with drainage basin size, floodplain width, and channel width. The canopy of headwater reaches was dominated by various combinations of Liquidambar styraciflua, Nyssa biflora, and Acer rubrum, while midreach systems were typically dominated by Taxodium distichum and/or Nyssa aquatica. Canopy composition was similar to other low order stream floodplains in the southeastern USA from Alabama to Maryland. However, the canopy composition of bottomlands differed in that the genera Fraxinus, Quercus, and Ulmus were generally less important in the North Carolina bottomlands than elsewhere in the Southeast.Metrics obtained from these relatively unaltered ecosystems could be used to develop standards for assessing of wetland condition and provide appropriate criteria for designing restoration of altered low order riverine ecosystems.

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“…Sabe-se que mudanças no clima e/ou microclima, tais como a redução da pluviosidade em uma determinada área, e catástrofes recorrentes, tais como furacões e secas intensas, podem levar a mudanças generalizadas em toda a comunidade (Condit et al 1992, 1996, Allen et al 1997, Frangi e Lugo 1998.…”

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Aspectos da variação ambiental em uma floresta de galeria em Itutinga, MG, Brasil.

Berg

Santos²

2003

Ciênc. Florest.

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Foi caracterizada a heterogeneidade ambiental em uma área de floresta de galeria (7,55 ha), em Itutinga, MG, Brasil, pelas variações das propriedades químicas e físicas do solo, da topografia e da abertura de dossel. As propriedades do solo e a topografia foram estudadas em 28 parcelas de 10 x 30 m utilizadas em um levantamento da comunidade arbóreo-arbustiva da área. Para a abertura do dossel utilizaram-se duas transecções de 50 m de largura, compostas por parcelas contíguas de 10 x 10 m, cruzando a floresta de lado a lado, perpendicularmente ao curso d'água. Fotos hemisféricas foram tomadas sobre estacas alternadas das extremidades das parcelas. Os dados de solo e topografia foram analisados por meio de uma PCA (Análise dos Componentes Principais) e a abertura do dossel mediante gráficos de tendência e regressão linear. A variação mais importante em termos de solos e abertura do dossel se deu no sentido do distanciamento da borda da floresta e aproximação do curso d'água. Nesse sentido, a abertura do dossel diminuiu (b = -0,096; R2 = 0,34) e a umidade e acidez do solo aumentaram (Eixo 1 do PCA, autovalor = 9,713). Os maiores valores da abertura do dossel próximo à borda foram explicados pela entrada de luz lateral através da borda da floresta com o campo limpo circundante.

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Hurricane Impacts on Liana Populations in an Old-Growth Southeastern Bottomland Forest

Cited by 56 publications

References 29 publications

Responses of floodplain forest species to spatially condensed gradients: a test of the flood–shade tolerance tradeoff hypothesis

Responses of floodplain forest species to spatially condensed gradients: a test of the flood–shade tolerance tradeoff hypothesis

Forested wetlands of low order streams in the inner coastal plain of North Carolina, USA

Aspectos da variação ambiental em uma floresta de galeria em Itutinga, MG, Brasil.

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