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https://www.readbyqxmd.com/read/28350498/evolutionary-assembly-of-communities-in-butterfly-mimicry-rings
#1
Jahnavi Joshi, Anupama Prakash, Krushnamegh Kunte
Species co-occurrence in ecological communities is thought to be influenced by multiple ecological and evolutionary processes, especially colonization and competition. However, effects of other interspecific interactions and evolutionary relationships are less explored. We examined evolutionary histories of community members and roles of mutualistic and parasitic interactions (Müllerian and Batesian mimicry, respectively) in the assembly of mimetic butterfly communities called mimicry rings in tropical forests of the Western Ghats, India...
April 2017: American Naturalist
https://www.readbyqxmd.com/read/28346905/modeling-the-terrestrial-n-processes-in-a-small-mountain-catchment-through-inca-n-a-case-study-in-taiwan
#2
Meng-Chang Lu, Chung-Te Chang, Teng-Chiu Lin, Lih-Jih Wang, Chiao-Ping Wang, Ting-Chang Hsu, Jr-Chuan Huang
Riverine dissolved inorganic nitrogen (DIN) is an important indicator of trophic status of aquatic ecosystems. High riverine DIN export in Taiwan, ~3800kg-Nkm(-2)yr(-1), which is ~18 times higher than the global average, urges the need of thorough understanding of N cycling processes. We applied INCA-N (Integrated Nitrogen Catchment Model) to simulate riverine DIN export and infer terrestrial N processes using weekly rainwater and streamwater samples collected at the Fushan Experimental Forest (FEF) of northern Taiwan...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28345759/stable-carbon-oxygen-and-nitrogen-isotope-analysis-of-plants-from-a-south-asian-tropical-forest-implications-for-primatology
#3
Patrick Roberts, Scott A Blumenthal, Wolfgang Dittus, Oshan Wedage, Julia A Lee-Thorp
Stable isotope analysis of primate tissues in tropical forest contexts is an increasingly popular means of obtaining information about niche distinctions among sympatric species, including preferences in feeding height, forest canopy density, plant parts, and trophism. However, issues of equifinality mean that feeding height, canopy density, as well as the plant parts and plant species consumed, may produce similar or confounding effects. With a few exceptions, researchers have so far relied largely on general principles and/or limited plant data from the study area as references for deducing the predominant drivers of primate isotope variation...
March 27, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28344904/insect-herbivores-increase-mortality-and-reduce-tree-seedling-growth-of-some-species-in-temperate-forest-canopy-gaps
#4
Nathan P Lemoine, Deron E Burkepile, John D Parker
Insect herbivores help maintain forest diversity through selective predation on seedlings of vulnerable tree species. Although the role of natural enemies has been well-studied in tropical systems, relatively few studies have experimentally manipulated insect abundance in temperate forests and tracked impacts over multiple years. We conducted a three-year experiment (2012-2014) deterring insect herbivores from seedlings in new treefall gaps in deciduous hardwood forests in Maryland. During this study, we tracked recruitment of all tree seedlings, as well as survivorship and growth of 889 individual seedlings from five tree species: Acer rubrum, Fagus grandifolia, Fraxinus spp...
2017: PeerJ
https://www.readbyqxmd.com/read/28341631/effects-of-soil-type-and-light-on-height-growth-biomass-partitioning-and-nitrogen-dynamics-on-22-species-of-tropical-dry-forest-tree-seedlings-comparisons-between-legumes-and-nonlegumes
#5
Christina M Smith-Martin, Maria G Gei, Ellie Bergstrom, Kristen K Becklund, Justin M Becknell, Bonnie G Waring, Leland K Werden, Jennifer S Powers
PREMISE OF THE STUDY: The seedling stage is particularly vulnerable to resource limitation, with potential consequences for community composition. We investigated how light and soil variation affected early growth, biomass partitioning, morphology, and physiology of 22 tree species common in tropical dry forest, including eight legumes. Our hypothesis was that legume seedlings are better at taking advantage of increased resource availability, which contributes to their successful regeneration in tropical dry forests...
March 24, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28340594/species-specific-ecological-niche-modelling-predicts-different-range-contractions-for-lutzomyia-intermedia-and-a-related-vector-of-leishmania-braziliensis-following-climate-change-in-south-america
#6
Shannon McIntyre, Elizabeth F Rangel, Paul D Ready, Bruno M Carvalho
BACKGROUND: Before 1996 the phlebotomine sand fly Lutzomyia neivai was usually treated as a synonym of the morphologically similar Lutzomyia intermedia, which has long been considered a vector of Leishmania braziliensis, the causative agent of much cutaneous leishmaniasis in South America. This report investigates the likely range changes of both sand fly species in response to a stabilisation climate change scenario (RCP4.5) and a high greenhouse gas emissions one (RCP8.5). METHODS: Ecological niche modelling was used to identify areas of South America with climates currently suitable for each species, and then the future distributions of these climates were predicted based on climate change scenarios...
March 24, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28338970/woody-plant-ecosystems-under-climate-change-and-air-pollution-response-consistencies-across-zonobiomes
#7
R Matyssek, A R Kozovits, G Wieser, J King, H Rennenberg
Forests store the largest terrestrial pools of carbon (C), helping to stabilize the global climate system, yet are threatened by climate change (CC) and associated air pollution (AP, highlighting ozone (O3) and nitrogen oxides (NOx)). We adopt the perspective that CC-AP drivers and physiological impacts are universal, resulting in consistent stress responses of forest ecosystems across zonobiomes. Evidence supporting this viewpoint is presented from the literature on ecosystem gross/net primary productivity and water cycling...
March 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28336423/comparative-analysis-of-complete-genome-sequences-of-european-subtype-tick-borne-encephalitis-virus-strains-isolated-from-ixodes-persulcatus-ticks-long-tailed-ground-squirrel-spermophilus-undulatus-and-human-blood-in-the-asian-part-of-russia
#8
T V Demina, S E Tkachev, I V Kozlova, E K Doroshchenko, O V Lisak, O V Suntsova, M M Verkhozina, Yu P Dzhioev, A I Paramonov, A Y Tikunov, N V Tikunova, V I Zlobin, D Ruzek
Tick-borne encephalitis virus (TBEV) is divided into three subtypes: European (TBEV-Eu), Siberian (TBEV-Sib), and Far Eastern (TBEV-FE) subtypes. The geographical range of TBEV-Eu dominates in Europe, but this subtype is present focally across the whole non-tropical forested Eurasian belt, through Russia to South Korea. However, the TBEV-Eu strains isolated outside Europe remain poorly characterized. In this study, full-genome sequences of eight TBEV-Eu isolates were determined. These strains were isolated from Ixodes persulcatus ticks, long-tailed ground squirrel (Spermophilus undulatus), and human blood in the natural foci of Western and Eastern Siberia, Russia...
March 9, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28334021/the-effect-of-remnant-forest-on-insect-successional-response-in-tropical-fire-impacted-peatland-a-bi-taxa-comparison
#9
Kok-Boon Neoh, Lee-Jin Bong, Ahmad Muhammad, Masayuki Itoh, Osamu Kozan, Yoko Takematsu, Tsuyoshi Yoshimura
Fire has become a common feature in tropical drained peatlands, and it may have detrimental impacts on the overall biodiversity of the forest ecosystem. We investigated the effect of fire on termite and ant assemblages and the importance of remnant forest in restoring species diversity in fire-impacted tropical peat swamp forests. The species loss of both termites and ants was as high as 50% in some fire-impacted peats compared to remnant forests, but in most cases the species richness for termites and ants was statistically equal along the land uses surveyed...
2017: PloS One
https://www.readbyqxmd.com/read/28332608/nutrient-cycling-mechanisms-other-than-the-direct-absorption-from-soil-may-control-forest-structure-and-dynamics-in-poor-amazonian-soils
#10
Oriol Grau, Josep Peñuelas, Bruno Ferry, Vincent Freycon, Lilian Blanc, Mathilde Desprez, Christopher Baraloto, Jérôme Chave, Laurent Descroix, Aurélie Dourdain, Stéphane Guitet, Ivan A Janssens, Jordi Sardans, Bruno Hérault
Tropical forests store large amounts of biomass despite they generally grow in nutrient-poor soils, suggesting that the role of soil characteristics in the structure and dynamics of tropical forests is complex. We used data for >34 000 trees from several permanent plots in French Guiana to investigate if soil characteristics could predict the structure (tree diameter, density and aboveground biomass), and dynamics (growth, mortality, aboveground wood productivity) of nutrient-poor tropical forests. Most variables did not covary with site-level changes in soil nutrient content, indicating that nutrient-cycling mechanisms other than the direct absorption from soil (e...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332127/a-review-of-zoonotic-infection-risks-associated-with-the-wild-meat-trade-in-malaysia
#11
REVIEW
Jennifer Caroline Cantlay, Daniel J Ingram, Anna L Meredith
The overhunting of wildlife for food and commercial gain presents a major threat to biodiversity in tropical forests and poses health risks to humans from contact with wild animals. Using a recent survey of wildlife offered at wild meat markets in Malaysia as a basis, we review the literature to determine the potential zoonotic infection risks from hunting, butchering and consuming the species offered. We also determine which taxa potentially host the highest number of pathogens and discuss the significant disease risks from traded wildlife, considering how cultural practices influence zoonotic transmission...
March 22, 2017: EcoHealth
https://www.readbyqxmd.com/read/28326126/scenarios-in-tropical-forest-degradation-carbon-stock-trajectories-for-redd
#12
REVIEW
Rafael B de Andrade, Jennifer K Balch, Amoreena L Parsons, Dolors Armenteras, Rosa Maria Roman-Cuesta, Janette Bulkan
BACKGROUND: Human-caused disturbance to tropical rainforests-such as logging and fire-causes substantial losses of carbon stocks. This is a critical issue to be addressed in the context of policy discussions to implement REDD+. This work reviews current scientific knowledge about the temporal dynamics of degradation-induced carbon emissions to describe common patterns of emissions from logging and fire across tropical forest regions. Using best available information, we: (i) develop short-term emissions factors (per area) for logging and fire degradation scenarios in tropical forests; and (ii) describe the temporal pattern of degradation emissions and recovery trajectory post logging and fire disturbance...
December 2017: Carbon Balance and Management
https://www.readbyqxmd.com/read/28325982/long-term-seasonal-dominance-of-the-wasp-trihapsis-polita-townes-hymenoptera-ichneumonidae-in-the-brazilian-atlantic-forest
#13
Bernardo F Santos, Alexandre P Aguiar, Anazélia M Tedesco, Julio C R Fontenelle
BACKGROUND: The temporal dynamics of insect populations in tropical environments is highly complex and poorly known. Long-term seasonality studies are scarce, and particularly so for ichneumonid wasps (Hymenoptera Ichneumonidae). This study represents an effort to elucidate aspects of seasonality and forest succession in the Brazilian Atlantic Forest. NEW INFORMATION: We report on the seasonal and successional dominance of the ichneumonid wasp Trihapsis polita (Cryptinae)...
2017: Biodiversity Data Journal
https://www.readbyqxmd.com/read/28323330/insights-on-the-evolutionary-origin-of-detarioideae-a-clade-of-ecologically-dominant-tropical-african-trees
#14
Manuel de la Estrella, Félix Forest, Jan J Wieringa, Marie Fougère-Danezan, Anne Bruneau
African tropical forests are generally considered less diverse than their Neotropical and Asian counterparts. By contrast, the Detarioideae is much more diverse in Africa than in South America and Asia. To better understand the evolution of this contrasting diversity pattern, we investigated the biogeographical and ecological origin of this subfamily, testing whether they originated in dry biomes surrounding the Tethys Seaway as currently hypothesized for many groups of Leguminosae. We constructed the largest time-calibrated phylogeny for the subfamily to date, reconstructed ancestral states for geography and biome/habitat, estimated diversification and extinction rates, and evaluated biome/habitat and geographic shifts in Detarioideae...
March 21, 2017: New Phytologist
https://www.readbyqxmd.com/read/28317110/atlantic-frugivory-a-plant-frugivore-interaction-dataset-for-the-atlantic-forest
#15
Carolina Bello, Mauro Galetti, Denise Montan, Marco A Pizo, Tatiane C Mariguela, Laurence Culot, Felipe Bufalo, Fabio Labecca, Felipe Pedrosa, Rafaela Constantini, Carine Emer, Wesley R Silva, Fernanda R da Silva, Otso Ovaskainen, Pedro Jordano
The dataset provided here includes 8320 frugivory interactions (records of pairwise interactions between plant and frugivore species) reported for the Atlantic Forest. The dataset includes interactions between 331 vertebrate species (232 birds, 90 mammals, five fishes, one amphibian and three reptiles) and 788 plant species. We also present information on traits directly related to the frugivory process (endozoochory), such as the size of fruits and seeds and the body mass and gape size of frugivores. Data were extracted from 166 published and unpublished sources spanning from 1961 to 2016...
March 19, 2017: Ecology
https://www.readbyqxmd.com/read/28303883/high-resolution-analysis-of-tropical-forest-fragmentation-and-its-impact-on-the-global-carbon-cycle
#16
Katharina Brinck, Rico Fischer, Jürgen Groeneveld, Sebastian Lehmann, Mateus Dantas De Paula, Sandro Pütz, Joseph O Sexton, Danxia Song, Andreas Huth
Deforestation in the tropics is not only responsible for direct carbon emissions but also extends the forest edge wherein trees suffer increased mortality. Here we combine high-resolution (30 m) satellite maps of forest cover with estimates of the edge effect and show that 19% of the remaining area of tropical forests lies within 100 m of a forest edge. The tropics house around 50 million forest fragments and the length of the world's tropical forest edges sums to nearly 50 million km. Edge effects in tropical forests have caused an additional 10...
March 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28301589/water-availability-not-fruitfall-modulates-the-dry-season-distribution-of-frugivorous-terrestrial-vertebrates-in-a-lowland-amazon-forest
#17
Omar Stalin Landázuri Paredes, Darren Norris, Tadeu Gomes de Oliveira, Fernanda Michalski
Terrestrial vertebrate frugivores constitute one of the major guilds in tropical forests. Previous studies show that the meso-scale distribution of this group is only weakly explained by variables such as altitude and tree basal area in lowland Amazon forests. For the first time we test whether seasonally limiting resources (water and fallen fruit) affect the dry season distribution in 25 species of terrestrial vertebrates. To examine the effects of the spatial availability of fruit and water on terrestrial vertebrates we used a standardized, regularly spaced arrangement of camera-traps within 25km2 of lowland Amazon forest...
2017: PloS One
https://www.readbyqxmd.com/read/28301482/forest-biomass-density-across-large-climate-gradients-in-northern-south-america-is-related-to-water-availability-but-not-with-temperature
#18
Esteban Álvarez-Dávila, Luis Cayuela, Sebastián González-Caro, Ana M Aldana, Pablo R Stevenson, Oliver Phillips, Álvaro Cogollo, Maria C Peñuela, Patricio von Hildebrand, Eliana Jiménez, Omar Melo, Ana Catalina Londoño-Vega, Irina Mendoza, Oswaldo Velásquez, Fernando Fernández, Marcela Serna, Cesar Velázquez-Rua, Doris Benítez, José M Rey-Benayas
Understanding and predicting the likely response of ecosystems to climate change are crucial challenges for ecology and for conservation biology. Nowhere is this challenge greater than in the tropics as these forests store more than half the total atmospheric carbon stock in their biomass. Biomass is determined by the balance between biomass inputs (i.e., growth) and outputs (mortality). We can expect therefore that conditions that favor high growth rates, such as abundant water supply, warmth, and nutrient-rich soils will tend to correlate with high biomass stocks...
2017: PloS One
https://www.readbyqxmd.com/read/28298349/network-reorganization-and-breakdown-of-an-ant-plant-protection-mutualism-with-elevation
#19
Nichola S Plowman, Amelia S C Hood, Jimmy Moses, Conor Redmond, Vojtech Novotny, Petr Klimes, Tom M Fayle
Both the abiotic environment and the composition of animal and plant communities change with elevation. For mutualistic species, these changes are expected to result in altered partner availability, and shifts in context-dependent benefits for partners. To test these predictions, we assessed the network structure of terrestrial ant-plant mutualists and how the benefits to plants of ant inhabitation changed with elevation in tropical forest in Papua New Guinea. At higher elevations, ant-plants were rarer, species richness of both ants and plants decreased, and the average ant or plant species interacted with fewer partners...
March 15, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28296567/flexible-parametrization-of-variance-functions-for-quantal-response-data-derived-from-counts
#20
Yuhui Chen, Timothy Hanson
Although the Poisson model has been widely used to fit count data, a well-known drawback is that the Poisson mean equals its variance. Many alternative models for counts that are overdispersed relative to Poisson have been developed to solve this issue, including the negative binomial model. In this article, the negative binomial model with a four-parameter logistic mean is proposed to handle these types of counts, with variance that flexibly depends on the mean. Various parameterizations for the variance are considered, including extra-Poisson variability modeled as an exponentiated B-spline...
February 14, 2017: Journal of Biopharmaceutical Statistics
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