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19 results for “tropical and subtropical forests”
Text-fig. 5. Vegetation zones in P. R. China (Editorial Committee of Vegetation Map of China, The Chinese Academy of Sciences 2007), and assumed location of extant reference vegetation type of Wiesa fossil assemblage (rectangle), as revealed from qualitative floristic analysis. Extant reference vegetation type present in southern belt of zone of subtropical evergreen broadleaved forest, with minor overlap into zone of tropical forest. in Assessment Of Phytogeographic Reference Regions For Cenozoic Vegetation: A Case Study On The Miocene Flora Of Wiesa (Germany)
Text-fig. 5. Vegetation zones in P. R. China (Editorial Committee of Vegetation Map of China, The Chinese Academy of Sciences 2007), and assumed location of extant reference vegetation type of Wiesa fossil assemblage (rectangle), as revealed from qualitative floristic analysis. Extant reference vegetation type present in southern belt of zone of subtropical evergreen broadleaved forest, with minor overlap into zone of tropical forest.
Fig. A3 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. A3. Map of the occurrences of Zonitoides arboreus s.l. and Zonitoides nitidus used for the calculation of climatic suitability for the 20 km grid resolution.
Fig. A4 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. A4. Global climatic suitability for: (a) Zonitoides arboreus s.l.; and (b) Zonitoides nitidus based on Mahalanobis distances using the 20 km grid resolution. The higher the threshold, the more dissimilar are the climatic conditions to those of the majority of known occurrences, and>100% means that the climatic conditions are dissimilar to those of any other available record. Please note that the deserts of Africa, Arabia and Australia are unlikely places for a snail that inhabits (temperate) forests in its native range (Z. arboreus s.l.), and that the Great Lakes Region that seems well inhabited by Z. nitidus does not fully match its climate, what can only be explained from effects of averaging local climates at a larger grid scale.
Fig. A1 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. A1. Map of the occurrences of Zonitoides arboreus s.l. used for the calculation of climatic suitability for the 10 km grid resolution.
Fig. 4 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. 4. Position of the new locations (L1 and L2, enumeration for each species separately) in Sabah in relation to the Mahalanobis distances of climatic variables for: (a) Zonitoides arboreus s.l., and (b) Z. nitidus. Record ID refers to the order of the data entry.
Fig. 2 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. 2. Global climatic suitability for (a) Zonitoides arboreus s.l. and (b) Zonitoides nitidus based on Mahalanobis distances from the 10 km grid resolution. The higher the threshold, the more dissimilar are the climatic conditions to those of the majority of known occurrences, and>100 % means that the climatic conditions are dissimilar to those of any other available record.
Fig. 1 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. 1. Estimation of the phylogenetic relationships of the COI barcoding sequence from the Zonitoides specimens and two outgroups (labeled with their BOLD or GenBank accession numbers) using the Maximum Likelihood method based on the Tamura-Nei model. The tree with the highest log likelihood (−2138.3583) is shown. Branch lengths equal genetic distances in terms of the number of base substitutions per site. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (500 replicates) are shown next to the branches. The tree was constructed in MEGA 6.0. Please note that the shell of (living) Z. nitidus is darkly pigmented, and that the extended animal of the depicted Z. nitidus started fading.
Fig. A2 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. A2. Map of the occurrences of Zonitoides nitidus used for the calculation of climatic suitability for the 10 km grid resolution.
Data from: Biotic homogenization and differentiation of plant communities in tropical and subtropical forests
<h4><strong>The article is published in Conservation Biology and available at: <a href="https://doi.org/10.1111/cobi.14025">https://doi.org/10.1111/cobi.14025</a></strong></h4> <h4>Here we developed a framework to assess the current 'state of the art' of biotic homogenization and differentiation processes in tropical and subtropical plant communities globally, using a systematic literature review.</h4> <h4>Please find below the analysis code and data used in the study.</h4> <h2>Descriptions for the files and scripts</h2> <h3>The `R` folder contains.</h3> <p><strong>1. *analysis_homogenization-differentiation.R*</strong> - script to generate the frequency and explanatory plots used in the manuscript.</p> <h3><br>The `output` folder contains:</h3> <p><strong>1. figures</strong><br><strong> 1. *Fig.1.tiff*</strong> - Figure 1 main text.<br><strong> 2. *Fig.2.tiff*</strong> - Figure 2 main text.<br><strong> 3. *Fig.3.tiff*</strong> - Figure 3 main text.<br><strong> 4. *Fig.4.tiff*</strong> - Figure 4 main text.<br><strong> 5. *Fig.5.tiff*</strong> - Figure 5 main text.<br><strong> 6. *Fig.6.tiff*</strong> - Figure 6 main text.<br><strong> 7. *Fig.7.tiff*</strong> - Figure 7 main text.</p> <p><strong>2. supp</strong><br><strong> 1. *appendix_S1-homogenization-differentiation.xlsx*</strong> - Supplementary material of the article. The file contains 4 sheets (*data*, *legend*, *scales_size* and *search_keywords*)</p> <h3><br>The `data` folder contains:</h3> <p><strong>1. processed</strong><br><strong> 1. *data_homogenization_refined.xlsx*</strong> - the data used in the analysis. Each analyzed variable was separated by a different sheet.</p> <p><br><strong>1. raw</strong><br><strong> 1. *data_homogenization.xlsx*</strong> - the raw data used in the analysis.</p> <p> </p> <h2>Acknowledgments</h2> <p>This work was financed by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (Finance code 001), through Portal de Periódicos to articles access and scholarship granted to J.M.F.K.</p>
Data from: Climate change will increase savannas at the expense of forests and treeless vegetation in tropical and subtropical Americas
1. Transition areas between biomes are particularly sensitive to environmental changes. Our understanding of the impacts of ongoing climate change on terrestrial ecosystems has significantly increased during the last years. However, it is largely unknown how climatic change will affect transitions among major vegetation types. 2. We modelled the distribution of three alternative states (forest, savanna and treeless areas) in the tropical and subtropical Americas by means of climate-niche modelling. We studied how such distribution will change by the year 2070 by using 17 downscaled and calibrated global climate models from the Coupled Model Intercomparison Project Phase 5 and the latest scenarios provided by the 5th Assessment Report of the IPCC. 3. Our results support the savannization of the tropical and subtropical Americas because of climate change, with an increase in savannas mainly at the expense of forests. 4. Our models predict an important geographical shift in the current distribution of transition areas between forest and savannas, which is much less pronounced in the case of those between savannas and treeless areas. Largest shifts, up to 600 km northward, are predicted in the forest–savanna transitions located in the eastern Amazon. 5. Our findings indicate that climate change will promote a shift towards more unstable states: the extent of the transition areas will notably increase, and largely stable forest areas are predicted to shrink dramatically. 6. Synthesis. Our work explores dimensions of the impact of climate change on biomes that have received little attention so far. Our results indicate that climate change will not only affect the extent of savanna, forest and treeless areas in the tropical and subtropical Americas, but also will: (i) promote a significant geographical shift and an increase of the extent of transition areas between biomes and (ii) decrease the stability of the equilibrium between forest, savanna and treeless areas, yielding a more unpredictable system.
Subspecies and Distribution. P. g. gymnocercus Fischer, 1814 — subtropical grasslands of NE Argentina, SE Brazil, Paraguay, and Uruguay. Pg. antiquus Ameghino, 1889 — Pampas grasslands, monte scrublands, and open woodlands of C Argentina. P. g. lordi Massoia, 1982 — Chaco-montane tropical forest ecotone in NW Argentina (Salta & Jujuy Provinces). The subspecific status of the Pampas Fox from Entre Rios Province in Argentina remains unclear, and there are no data regarding the taxonomic position of Bolivian foxes. in Canidae
Subspecies and Distribution. P. g. gymnocercus Fischer, 1814 — subtropical grasslands of NE Argentina, SE Brazil, Paraguay, and Uruguay. Pg. antiquus Ameghino, 1889 — Pampas grasslands, monte scrublands, and open woodlands of C Argentina. P. g. lordi Massoia, 1982 — Chaco-montane tropical forest ecotone in NW Argentina (Salta & Jujuy Provinces). The subspecific status of the Pampas Fox from Entre Rios Province in Argentina remains unclear, and there are no data regarding the taxonomic position of Bolivian foxes.
Subspecies and Distribution. P. g. gymnocercus Fischer, 1814 — subtropical grasslands of NE Argentina, SE Brazil, Paraguay, and Uruguay. P.g. antiquus Ameghino, 1889 — Pampas grasslands, monte scrublands, and open woodlands of C Argentina. P. g. lordi Massoia, 1982 — Chaco-montane tropical forest ecotone in NW Argentina (Salta & Jujuy Provinces). The subspecific status of the Pampas Fox from Entre Rios Province in Argentina remains unclear, and there are no data regarding the taxonomic position of Bolivian foxes. in Canidae
Subspecies and Distribution. P. g. gymnocercus Fischer, 1814 — subtropical grasslands of NE Argentina, SE Brazil, Paraguay, and Uruguay. P.g. antiquus Ameghino, 1889 — Pampas grasslands, monte scrublands, and open woodlands of C Argentina. P. g. lordi Massoia, 1982 — Chaco-montane tropical forest ecotone in NW Argentina (Salta & Jujuy Provinces). The subspecific status of the Pampas Fox from Entre Rios Province in Argentina remains unclear, and there are no data regarding the taxonomic position of Bolivian foxes.
Alpha-diversity, Beta-diversity and host-specificity of wood-boring longhorn beetle (Cerambycidea) in Asian tropical and subtropical forests
<p><span>A long-debated question in ecology is whether the hyper-diversity of tropical plant-feeding insects is a direct consequence of high tropical plant diversity and/or should be attributed to increases in host plant specialization. To address this debate, we used the longhorn beetle as a study system because their larval stages feed on the xylems of trees and lianas. We hypothesized that longhorn beetles show higher host-specificity in tropical forests than in other forests; alternatively, the high longhorn beetle diversity in the tropics may simply be owing to more diverse host plants. We therefore designed an investigation in tropical and subtropical forests to test these hypotheses. We adapted several analyses (i.e., non-metric multidimensional scaling analysis, alpha-diversity, beta-dissimilarity indices comparisons, and variation partitioning based on redundancy analysis) to compare the species diversity of plants and longhorn beetles in different forests. Our results show that both the plant and beetle species in the tropical and subtropical areas were well-stratified (non-metric multidimensional scaling analysis). The beetle alpha-diversity in the tropical forests was significantly higher than that in the subtropical forests, but the plant alpha-diversity in the two types of forests were not significantly different. The beta-dissimilarity comparison showed that the plant species exerted a significant influence on beetle compositional assemblage in the tropical forests, but not in the subtropical forests. Finally, the variation partitioning results showed that both plant species and plant phylogenetic beta-diversity possessed significant explanatory power for beetle assemblage composition in the tropical forests, but not in the subtropical forests. We conclude that wood-boring longhorn beetles show higher host-specificity in tropical forests than in subtropical forests, and the high diversity of wood-boring longhorn beetles in tropical forests might be explained to a large extent by their more finely partitioned diet-breadth.</span></p>
Data from: Globally consistent impact of tropical cyclones on the structure of tropical and subtropical forests
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Alpha-diversity, Beta-diversity and host-specificity of wood-boring longhorn beetle (Cerambycidea) in Asian tropical and subtropical forests
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Data from: Climate change will increase savannas at the expense of forests and treeless vegetation in tropical and subtropical Americas
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Associations between socio-environmental factors and landscape-scale biodiversity recovery in naturally regenerating tropical and subtropical forests
<p class="western"><span><span>Natural regeneration is key for large-scale forest restoration, yet it may lead to different biodiversity outcomes depending on socio-environmental context. We combined the results of a global meta-analysis to quantify how biodiversity recovery in naturally regenerating forests deviates from biodiversity values in reference old-growth forests, with structural equation modeling, to identify direct and indirect associations between socioeconomic, biophysical and ecological factors and deviation in biodiversity recovery at a landscape scale. Low deviation within a landscape means higher chances of multiple sites in naturally regenerating forests successfully recovering biodiversity compared to reference forests. Deviation in biodiversity recovery was directly negatively associated with the percentage of cropland, forest cover, and positively associated with the percentage of urban areas in the surrounding landscape. These three factors mediated the indirect associations with rural population size, recent gross deforestation, time since natural regeneration started, mean annual temperature, mean annual water deficit, road density, land opportunity cost, percentage cover of strictly protected forest areas, and human population variation in the surrounding landscape. We suggest that natural forest restoration should be prioritized in landscapes with both low socioeconomic pressures on land use conversion to pasturelands and urban areas, and high percentage of forest cover.</span></span></p>
Fig. 3 in Susceptibility of tropical mountain forests to biological invasions from the temperate and subtropical zone, exemplified by Zonitoides (Gastropoda: Gastrodontidae)
Fig. 3. Climatic suitability for (a) Zonitoides arboreus s.l.; and (b) Zonitoides nitidus on the Malaysian Peninsula, Sumatra and Borneo, based on Mahalanobis distances. The higher the threshold, the more dissimilar are the climatic conditions to those of the majority of known occurrences.>100% means that the climatic conditions are dissimilar to those of any available record. The new records for the species (white circles) were not included in the calculation of the climatic suitability.
Associations between socio-environmental factors and landscape-scale biodiversity recovery in naturally regenerating tropical and subtropical forests
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