scholarly journals Successional and Intraspecific Variations in Leaf Traits, Spectral Reflectance Indices and Herbivory in a Brazilian Tropical Dry Forest

2021 ◽  
Vol 4 ◽  
Author(s):  
Alline Mendes Alves ◽  
Mário Marcos do Espírito-Santo ◽  
Jhonathan O. Silva ◽  
Gabriela Faccion ◽  
Gerardo Arturo Sanchez-Azofeifa ◽  
...  
Keyword(s):  
Spectral Reflectance ◽  
Tropical Dry Forest ◽  
Leaf Traits ◽  
Dry Forest ◽  
Leaf Reflectance ◽  
Successional Gradient ◽  
Successional Stages ◽  
Reflectance Indices ◽  
Late Stages ◽  
Spectral Reflectance Indices

Leaf traits are good indicators of ecosystem functioning and can affect herbivory and leaf reflectance patterns, allowing a better understanding of changes in environmental conditions, such those observed during forest natural regeneration. The aim of this study was to evaluate the intraspecific variation in leaf traits and their influence on the pattern of herbivory and leaf reflectance in three species distributed along a successional gradient (early, intermediate and late stages) in a tropical dry forest (TDF) in northern Minas Gerais, Brazil. We sampled individuals of the following abundant tree species that occurred in multiple successional stages: Cenostigma pluviosum, Handroanthus ochraceus, and Tabebuia reticulata. We collected 10 leaves from each tree to determine the contents of chlorophyll a, b, and total, carotenoids and water, as well as the percentage of leaf area removed by herbivores and leaf specific mass (LSM). We also measured five spectral reflectance indices (Normalized Difference Vegetation Index-NDVI, Simple Ratio-SR, modified Normalized Difference-nND, modified SR-mSR and Water Index-WI) using a portable spectrometer. Our results showed intraspecific differences in most leaf traits along the successional gradient, suggesting that local adaptation may play an important role in plant community assembly. However, herbivory only differed for H. ochraceus in early and intermediate stages, but it was not affected by the leaf traits considered here. Spectral reflectance indices also differed among successional stage for all species together and for each species separately, except for T. reticulata in intermediate and late stages. Thus, leaf spectral signatures may be an important tool to the remote detection of different successional stages in TDFs, with implications for forest management.

scholarly journals Ant Assemblage Structure in a Secondary Tropical Dry Forest: The Role of Ecological Succession and Seasonality

Sociobiology ◽  
2017 ◽  
Vol 64 (3) ◽  
pp. 261 ◽  
Author(s):  
Tatianne Gizelle Marques ◽  
Mário Marcos Espírito-Santo ◽  
Frederico Siqueira Neves ◽  
José Henrique Schoereder
Keyword(s):  
Species Richness ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Biological Mechanisms ◽  
Ant Assemblages ◽  
Β Diversity ◽  
Advanced Stages ◽  
Successional Stages ◽  
Late Stages

This study identified the main biological mechanisms governing the diversity of ants on different ecological time scales. Ants were sampled in 15 plots distributed in early, intermediate and late stages of succession (five plots per stage) at the Parque Estadual da Mata Seca, Brazil. At each sample point, unbaited pitfall traps were installed in hypogaeic, epigaeic and arboreal strata. We collected 95 ant species from 26 genera and nine subfamilies. Our results indicated that there was an increase in species richness in advanced stages of succession. We also observed that ant assemblages were different among successional stages. For the arboreal and epigaeic strata, species richness did not change with succession progression, but species composition of these two strata differed among successional stages. Unlike to arboreal and epigaeic ants, hypogaiec ant species richness was higher in the intermediate and late stages of succession and the composition of hypogaeic ants differed among successional stages. Similarity between ant species foraging in arboreal and epigaeic strata decreases with succession progression and β-diversity was higher in advanced successional stages. Additionally, species richness was higher in the dry season, whereas the composition of ant assemblages did not change between seasons. A considerable fraction of the ant assemblage was found only in advanced stages of succession, demonstrating the importance of secondary habitats in maintaining biodiversity in dry forests.

scholarly journals Herbivory and leaf traits of two tree species from different successional stages in a tropical dry forest

2021 ◽  
Vol 7 (1) ◽  
pp. 266-275
Author(s):  
Fernando Henrique de Sena ◽  
Bruno Melo Lustosa ◽  
Silvia Roberta Santos Silva ◽  
Hiram Marinho Falcão ◽  
Jarcilene Silva de Almeida
Keyword(s):  
Tree Species ◽  
Tropical Dry Forest ◽  
Leaf Traits ◽  
Dry Forest ◽  
Successional Stages

Spatiotemporal variation in phyllostomid bat assemblages over a successional gradient in a tropical dry forest in southeastern Brazil

2014 ◽  
Vol 30 (2) ◽  
pp. 123-132 ◽  
Author(s):  
Luiz Alberto Dolabela Falcão ◽  
Mário Marcos do Espírito-Santo ◽  
Lemuel Olívio Leite ◽  
Raphael Neiva Souza Lima Garro ◽  
Luis Daniel Avila-Cabadilla ◽  
...  
Keyword(s):  
Tropical Dry Forest ◽  
Spatiotemporal Variation ◽  
Dry Forest ◽  
Southeastern Brazil ◽  
Successional Stage ◽  
Future Studies ◽  
Eastern Brazil ◽  
Successional Gradient ◽  
Successional Stages ◽  
Landscape Level

Abstract:The aim of this study was to investigate the spatiotemporal variation in richness, abundance, structure and composition of phyllostomid bats over a successional gradient in a tropical dry forest in south-eastern Brazil. Four successional stages (pasture, early, intermediate and late) were sampled in the northern part of the state of Minas Gerais. Bats were sampled using mist nets at three sites for each of the four successional stages (12 sites in total) during eight periods between 2007 and 2009. A total of 537 individuals were captured (29 recaptured), distributed among four families and 22 species. Bat abundance and richness varied in space, being higher in the late-successional stage, and over time, being significantly lower during the dry season. When compared between guilds, only the abundance of omnivores varied significantly during the sampled months. Our results demonstrate that areas of late-successional stages showed higher bat richness and abundance in comparison with areas undergoing secondary succession. Our results also suggest the use of early-successional areas as flying routes by bats can lead to failure to detect differences in bat composition within successional gradients. We suggest future studies should assimilate landscape-level analyses into their studies to better evaluate the effects of successional gradients on bat assemblages.

Spectral Reflectance Indices as a Potential Indirect Selection Criteria for Wheat Yield under Irrigation

Crop Science ◽  
2006 ◽  
Vol 46 (2) ◽  
pp. 578-588 ◽  
Author(s):  
M. A. Babar ◽  
M. P. Reynolds ◽  
M. van Ginkel ◽  
A. R. Klatt ◽  
W. R. Raun ◽  
...  
Keyword(s):  
Spectral Reflectance ◽  
Selection Criteria ◽  
Wheat Yield ◽  
Indirect Selection ◽  
Reflectance Indices ◽  
Spectral Reflectance Indices

scholarly journals Litterfall dynamics along a successional gradient in a Brazilian tropical dry forest

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Saimo R. Souza ◽  
Maria D. M. Veloso ◽  
Mário M. Espírito-Santo ◽  
Jhonathan O. Silva ◽  
Arturo Sánchez-Azofeifa ◽  
...  
Keyword(s):  
Tropical Dry Forest ◽  
Dry Forest ◽  
Successional Gradient

The Potential of Using Spectral Reflectance Indices to Estimate Yield in Wheat Grown Under Reduced Irrigation

Euphytica ◽  
2006 ◽  
Vol 150 (1-2) ◽  
pp. 155-172 ◽  
Author(s):  
M. A. Babar ◽  
M. van Ginkel ◽  
A. R. Klatt ◽  
B. Prasad ◽  
M. P. Reynolds
Keyword(s):  
Spectral Reflectance ◽  
Reflectance Indices ◽  
Spectral Reflectance Indices

scholarly journals Leaf Canopy Layers Affect Spectral Reflectance in Silver Birch

2019 ◽  
Vol 11 (24) ◽  
pp. 2884 ◽  
Author(s):  
Maya Deepak ◽  
Sarita Keski-Saari ◽  
Laure Fauch ◽  
Lars Granlund ◽  
Elina Oksanen ◽  
...  
Keyword(s):  
Principal Component ◽  
Common Garden ◽  
Dry Weight ◽  
Leaf Traits ◽  
Tree Canopy ◽  
Canopy Reflectance ◽  
Canopy Layer ◽  
Leaf Reflectance ◽  
Individual Trees ◽  
Reflectance Indices

The availability of light within the tree canopy affects various leaf traits and leaf reflectance. We determined the leaf reflectance variation from 400 nm to 2500 nm among three canopy layers and cardinal directions of three genetically identical cloned silver birches growing at the same common garden site. The variation in the canopy layer was evident in the principal component analysis (PCA), and the influential wavelengths responsible for variation were identified using the variable importance in projection (VIP) based on partial least squares discriminant analysis (PLS-DA). Leaf traits, such as chlorophyll, nitrogen, dry weight, and specific leaf area (SLA), also showed significant variation among the canopy layers. We found a shift in the red edge inflection point (REIP) for the canopy layers. The canopy layers contribute to the variability in the reflectance indices. We conclude that the largest variation was among the canopy layers, whereas the differences among individual trees to the leaf reflectance were relatively small. This implies that within-tree variation due to the canopy layer should be taken into account in the estimation of intraspecific variation in the canopy reflectance.

Sign in / Sign up

Export Citation Format

Share Document