The relationship between leaf area index and microclimate in tropical forest and oil palm plantation: Forest disturbance drives changes in microclimate

Hardwick, Stephen R.; Toumi, Ralf; Pfeifer, Marion; Turner, Edgar C.; Nilus, Reuben; Ewers, Robert M.

doi:10.1016/j.agrformet.2014.11.010

Cited by 354 publications

(347 citation statements)

References 37 publications

(42 reference statements)

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“…This may reflect changes to the stand structure as a result of logging although differences in the elevation between forest types may also be a factor. Because the microclimatic differences were much smaller than it would be expected from the difference in elevation, we assume that the variations detected are consequences from the land‐use change (Hardwick et al., 2015). …”

Section: Discussionmentioning

confidence: 99%

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Land use not litter quality is a stronger driver of decomposition in hyperdiverse tropical forest

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Elias

Kritzler

et al. 2017

Ecology and Evolution

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In hyperdiverse tropical forests, the key drivers of litter decomposition are poorly understood despite its crucial role in facilitating nutrient availability for plants and microbes. Selective logging is a pressing land use with potential for considerable impacts on plant–soil interactions, litter decomposition, and nutrient cycling. Here, in Borneo's tropical rainforests, we test the hypothesis that decomposition is driven by litter quality and that there is a significant “home‐field advantage,” that is positive interaction between local litter quality and land use. We determined mass loss of leaf litter, collected from selectively logged and old‐growth forest, in a fully factorial experimental design, using meshes that either allowed or precluded access by mesofauna. We measured leaf litter chemical composition before and after the experiment. Key soil chemical and biological properties and microclimatic conditions were measured as land‐use descriptors. We found that despite substantial differences in litter quality, the main driver of decomposition was land‐use type. Whilst inclusion of mesofauna accelerated decomposition, their effect was independent of land use and litter quality. Decomposition of all litters was slower in selectively logged forest than in old‐growth forest. However, there was significantly greater loss of nutrients from litter, especially phosphorus, in selectively logged forest. The analyses of several covariates detected minor microclimatic differences between land‐use types but no alterations in soil chemical properties or free‐living microbial composition. These results demonstrate that selective logging can significantly reduce litter decomposition in tropical rainforest with no evidence of a home‐field advantage. We show that loss of key limiting nutrients from litter (P & N) is greater in selectively logged forest. Overall, the findings hint at subtle differences in microclimate overriding litter quality that result in reduced decomposition rates in selectively logged forests and potentially affect biogeochemical nutrient cycling in the long term.

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Section: Discussionmentioning

confidence: 99%

“…OG forest appears to be able to buffer microclimatic extremes and hence allows consistently suitable decomposition conditions. In our study, both forest types lie in the same geographic area emphasizing the relevance of small‐scale microclimatic differences modified by selective logging (Hardwick et al., 2015). …”

Section: Discussionmentioning

confidence: 99%

Land use not litter quality is a stronger driver of decomposition in hyperdiverse tropical forest

Both

Elias

Kritzler

et al. 2017

Ecology and Evolution

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“…Canopy cover influences a forests' climate [54] and is in the GNNR highly correlated with successional age. Also, older plots had fewer deciduous trees [29] and a higher leaf area index, resulting in less insolation of the understory and wetter and cooler conditions [55]. Solitary nest-provisioning Hymenoptera, however, need light and warmth for effective foraging [28] and brood development [56].…”

Section: (B) Direct and Indirect Environmental Influences On Hostsmentioning

confidence: 99%

Tree phylogenetic diversity promotes host–parasitoid interactions

et al. 2016

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Evidence from grassland experiments suggests that a plant community's phylogenetic diversity (PD) is a strong predictor of ecosystem processes, even stronger than species richness per se. This has, however, never been extended to species-rich forests and host-parasitoid interactions. We used cavitynesting Hymenoptera and their parasitoids collected in a subtropical forest as a model system to test whether hosts, parasitoids, and their interactions are influenced by tree PD and a comprehensive set of environmental variables, including tree species richness. Parasitism rate and parasitoid abundance were positively correlated with tree PD. All variables describing parasitoids decreased with elevation, and were, except parasitism rate, dependent on host abundance. Quantitative descriptors of host-parasitoid networks were independent of the environment. Our study indicates that host-parasitoid interactions in species-rich forests are related to the PD of the tree community, which influences parasitism rates through parasitoid abundance. We show that effects of tree community PD are much stronger than effects of tree species richness, can cascade to high trophic levels, and promote trophic interactions. As during habitat modification phylogenetic information is usually lost nonrandomly, even species-rich habitats may not be able to continuously provide the ecosystem process parasitism if the evolutionarily most distinct plant lineages vanish.

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“…Por esta definição o IAF é uma medida adimensional (também expressa em m 2 .m −2 ). O IAF é uma variável biofísica que tem influência sobre vários processos superficiais, tais como fotossíntese, transpiração e balanço de radiação da superfície, por isso é um dos mais importantes parâmetros de entrada de modelos ecológicos (BREDA, 2003;ISHIHARA;HIURA, 2011;YAN et al, 2012). O IAF representa a interface entre o ecossistema e a atmosfera, sendo de dificil estimativa devido sua variabilidade espacial (horizontal e vertical) e temporal (ciclos anuais e interanual) (BREDA, 2003;WANG et al, 2005).…”

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“…O IAF representa a interface entre o ecossistema e a atmosfera, sendo de dificil estimativa devido sua variabilidade espacial (horizontal e vertical) e temporal (ciclos anuais e interanual) (BREDA, 2003;WANG et al, 2005). Breda (2003) e Jonckheerea et al (2004) apresentam uma revisão dos muitos métodos que podem ser utilizados para estimar o IAF, a aplicação de cada mé-todo depende de vários fatores como, nível de precisão, destruição da planta, tipo de planta (herbácea, arbustiva ou arbórea), se de um individuo ou de uma comunidade de plantas, etc. Para florestas que tem como característica a caducifólia, como no caso da Caatinga, o mé-todo da coleta de serrapilheira é frequentemente o mais utilizado, por não ser destrutivo.…”

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Índice de Área Foliar em Caatinga Preservada

Carvalho

Almeida

et al. 2017

cnx

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Resumo. O índice de área foliar (IAF) é um parâmetro biofísico que tem influência sobre vários processos ambientais, tais como fotossíntese, transpiração e balanço de radiação da superfície, sendo um importante parâmetro de entrada de modelos ecológicos. No bioma Caatinga ainda são escasso informações sobre o IAF e os fatores que o afetam direta e indiretamente seu valor. O estudo teve como objetivo avaliar a massa foliar específica (MFE) e o índice de área foliar para três tipos de associação solo-vegetação (ASV) em uma área de Caatinga preservada. O estudo foi realizado na Bacia Experimental de Aiuaba (BEA) por meio do método de coleta de serrapilheira. Duas unidades fitossociológicas em cada ASV foram levantadas para identificação das espécies e obtenção da massa foliar especifica. A MFE média das 17 espécies encontradas nas três ASVs foi de 56,6 g m Abstract. The leaf area index (LAI) is a biophysical parameter that influences various environmental processes such as photosynthesis, transpiration and surface radiation balance, being an important input parameter of ecological models. In Caatinga biome are still scarce information about the LAI and the factors that directly and indirectly affect its value. The study aimed to evaluate the specific leaf mass (SLM) and leaf area index for three kinds of soil-vegetation association (SVA) in a area preserved of Caatinga. The study was conducted at the Aiuaba Experimental Basin (AEB) through the litter traps method. Two phytosociological units in each ASV were raised to species identification and achievement of specific leaf mass. SLM average of the 22 species found in the three ASVs was 56.6 g m −2 . The results showed that the LAI in ASV3 (1.8 m 2 m −2 ) were lower than the ASV1 (2.7 m 2 m −2 ) mainly affected by soil type. The results of this research contribute to the understanding of the IAF's value in the Caatinga biome.

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The relationship between leaf area index and microclimate in tropical forest and oil palm plantation: Forest disturbance drives changes in microclimate

Cited by 354 publications

References 37 publications

Land use not litter quality is a stronger driver of decomposition in hyperdiverse tropical forest

Land use not litter quality is a stronger driver of decomposition in hyperdiverse tropical forest

Tree phylogenetic diversity promotes host–parasitoid interactions

Índice de Área Foliar em Caatinga Preservada

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