Assessing site productivity in tropical moist forests: a review

Vanclay, Jerome K.

doi:10.1016/0378-1127(92)90017-4

Cited by 78 publications

(65 citation statements)

References 48 publications

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“…In addition we calculated the CVP index by Paterson (1956) which has been widely used (Benavides et al, 2009;Chittagong, 2015;Vanclay, 1992) for characterization of growing conditions. As our stands vary widely in latitude and altitude and represent a broad range of mean and amplitude of temperature, precipitation (Fig.…”

Section: Q2mentioning

confidence: 99%

Mixing of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) enhances structural heterogeneity, and the effect increases with water availability

Pretzsch

Rı́o

Schütze

et al. 2016

Forest Ecology and Management

130

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a b s t r a c tThe mixing of tree species with complementary ecological traits may modify forest functioning regarding productivity, stability, or resilience against disturbances. This may be achieved by a higher heterogeneity in stand structure which is often addressed but rarely quantified. Here, we use 32 triplets of mature and fully stocked monocultures and mixed stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) located along a productivity and water availability gradient through Europe to examine how mixing modifies the stand structure in terms of stand density, horizontal tree distribution pattern, vertical stand structure, size distribution pattern, and variation in tree morphology. We further analyze how site conditions modify these aspects of stand structure. For this typical mixture of a light demanding and shade tolerant species we show that (i) mixing significantly increases many aspects of structural heterogeneity compared with monocultures, (ii) mixing effects such as an increase of stand density and diversification of vertical structure and tree morphology are caused by species identity (additive effects) but also by species interactions (multiplicative effects), and (iii) superior heterogeneity of mixed stands over monocultures can increase from dry to moist sites. We discuss the implications for analyzing the productivity, for modelling and for the management of mixed species stands.

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Section: Q2mentioning

confidence: 99%

Mixing of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) enhances structural heterogeneity, and the effect increases with water availability

Pretzsch

Rı́o

Schütze

et al. 2016

Forest Ecology and Management

130

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show abstract

“…In modelling stand dynamics (growth, recruitment and mortality), environmental effects can be estimated from habitat characteristics including canopy layer, vegetation type, elevation, soil type, depth of the humus horizon, slope and aspect (Bossel and Krieger, 1994;Vanclay, 1992Vanclay, , 1994aSterba and Monserud, 1997). However, information on some of these habitat characteristics are very expensive to collect while attempts to incorporate simple habitat characteristics in growth models has not always been successful (Gourlet-Fleury and Houllier, 2000).…”

Section: Introductionmentioning

confidence: 99%

Diameter growth performance varies with species functional-group and habitat characteristics in subtropical rainforests

Kariuki

Rolfe

Smith³

et al. 2006

Forest Ecology and Management

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We examined tree diameter growth in 20 plots subjected to various disturbance intensities (natural, low, moderate and intensive logging) in a bid to understand the general tree growth responses in relation to habitat characteristics in subtropical rainforests of north-eastern New South Wales, Australia. Species-specific regeneration strategy, maximum size and level of shade tolerance were used to classify species into 5 groups; emergent and shade tolerant main canopy (group 1), shade tolerant mid canopy (2), shade tolerant understoreys (3), moderate shade tolerant (4), and shade intolerant (5) tree species. Data series for trees ≥ 10 cm diameter at 1.3 m above the ground level (dbh) providing observations spanning over 36-years were used in multilevel regression analyses. The results showed that spatial and temporal effects in tree growth at the stand-level are a combination of the differences between species functional-group compositions and environmental gradients. High growth responses were observed in the shade intolerant species while increasing level of shade tolerance and decreasing maximum size decreased trees growth rates. Tree growth increased with altitude on a large scale across regions, and with disturbance intensity on a small scale at the plot (stand) level. Increase in northness (south through flat to north facing sites) increased growth in species group 1 for trees < 67 cm dbh, but beyond this dbh threshold the opposite was true. These showed that saplings of species group 1 may require increased illumination to reach the forest canopy, but once in the canopy, low soil water availability may be limiting to tree growth in the north facing sites. Decrease in northness was associated with increased growth in species group 2 indicating that reduced illumination and improved soil moisture in the south facing sites were conducive for maximum growth in this species group. Maximum growth potential in species group 4 and 5 increased with decrease in eastness, suggesting that the increased afternoon solar radiation and temperature were conducive for high growth rates in these species. Although topographic gradient may determine the spatial and temporal variations in tree growth where growth appeared to increase from the crest down the slope into the creek, its effects on soil fertility and water availability, and interactions between these and other factors may make it difficult to discern clear growth patterns.

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“…Tree height growth can indicate site quality reliably if the stand is not too open or dense (Alemdag 1988). Although alternatives have been proposed (e.g., Vanclay and Henry 1988;Vanclay 1989), height-based SI remains one of the preferred methods for assessing site productivity in mixed-species stands (Vanclay 1992), notwithstanding the challenges of estimation. SI equations have been produced for many important temperate forestry species (Alemdag 1988;Brown 2006;Elfving and Kiviste 1997;Wilczynski and Slawomir 2006) but are lacking for most tropical species (Pancel 1993).…”

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confidence: 99%

Species-site matching in mixed species plantations of native trees in tropical Australia

et al. 2012

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Assessing site productivity in tropical moist forests: a review

Cited by 78 publications

References 48 publications

Mixing of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) enhances structural heterogeneity, and the effect increases with water availability

Mixing of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) enhances structural heterogeneity, and the effect increases with water availability

Diameter growth performance varies with species functional-group and habitat characteristics in subtropical rainforests

Species-site matching in mixed species plantations of native trees in tropical Australia

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