keyword
MENU ▼
Read by QxMD icon Read
search

tropical forest

keyword
https://www.readbyqxmd.com/read/28645050/land-use-affects-total-dissolved-nitrogen-and-nitrate-concentrations-in-tropical-montane-streams-in-kenya
#1
Suzanne R Jacobs, Lutz Breuer, Klaus Butterbach-Bahl, David E Pelster, Mariana C Rufino
African tropical montane forests are facing fast and dynamic changes in land use. However, the impacts of these changes on stream water quality are understudied. This paper aims at assessing the effect of land use and physical catchment characteristics on stream water concentrations of dissolved organic carbon (DOC), total dissolved nitrogen (TDN), nitrate (NO3-N) and dissolved organic nitrogen (DON) in the Mau Forest, the largest tropical montane forest in Kenya. We conducted five synoptic stream water sampling campaigns at the outlets of 13-16 catchments dominated by either natural forest, smallholder agriculture or commercial tea and tree plantations...
June 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28640356/diameter-distribution-in-a-brazilian-tropical-dry-forest-domain-predictions-for-the-stand-and-species
#2
Robson B DE Lima, Lina Bufalino, Francisco T Alves, José A A DA Silva, Rinaldo L C Ferreira
Currently, there is a lack of studies on the correct utilization of continuous distributions for dry tropical forests. Therefore, this work aims to investigate the diameter structure of a brazilian tropical dry forest and to select suitable continuous distributions by means of statistic tools for the stand and the main species. Two subsets were randomly selected from 40 plots. Diameter at base height was obtained. The following functions were tested: log-normal; gamma; Weibull 2P and Burr. The best fits were selected by Akaike's information validation criterion...
April 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28634675/wild-capuchin-monkeys-anticipate-the-amount-of-ripe-fruit-in-natural-trees
#3
María Paula Tujague, Charles H Janson
Tropical forests have a high diversity of tree species which have very low densities and vary across time in their seasons of peak fruiting and maturation rates. As evidence of the ability of primates to track or anticipate changes in fruit production at individual trees, researchers have used the increased speed of primate groups toward more rewarding food patches. We analyzed the speed of approach to natural trees of wild capuchin monkeys under the effect of scramble competition, after excluding any plausible visual, olfactory and auditory cues...
June 20, 2017: Animal Cognition
https://www.readbyqxmd.com/read/28634342/natural-canopy-bridges-effectively-mitigate-tropical-forest-fragmentation-for-arboreal-mammals
#4
Tremaine Gregory, Farah Carrasco-Rueda, Alfonso Alonso, Joseph Kolowski, Jessica L Deichmann
Linear infrastructure development and resulting habitat fragmentation are expanding in Neotropical forests, and arboreal mammals may be disproportionately impacted by these linear habitat clearings. Maintaining canopy connectivity through preservation of connecting branches (i.e. natural canopy bridges) may help mitigate that impact. Using camera traps, we evaluated crossing rates of a pipeline right-of-way in a control area with no bridges and in a test area where 13 bridges were left by the pipeline construction company...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28632343/dispersal-isolation-and-diversification-with-continued-gene-flow-in-an-andean-tropical-dry-forest
#5
R Toby Pennington, Matt Lavin
The Andes are the world's longest mountain chain, and the tropical Andes are the world's richest biodiversity hot spot. The origin of the tropical Andean cordillera is relatively recent because the elevation of the mountains was relatively low (400-2500 m palaeoelevations) only 10 MYA with final uplift being rapid. These final phases of the Andean orogeny are thought to have had a fundamental role in shaping processes of biotic diversification and biogeography, with these effects reaching far from the mountains themselves by changing the course of rivers and deposition of mineral-rich Andean sediments across the massive Amazon basin...
July 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28624912/sustainable-cattle-ranching-in-practice-moving-from-theory-to-planning-in-colombia-s-livestock-sector
#6
Amy M Lerner, Andrés Felipe Zuluaga, Julián Chará, Andrés Etter, Timothy Searchinger
A growing population with increasing consumption of milk and dairy require more agricultural output in the coming years, which potentially competes with forests and other natural habitats. This issue is particularly salient in the tropics, where deforestation has traditionally generated cattle pastures and other commodity crops such as corn and soy. The purpose of this article is to review the concepts and discussion associated with reconciling food production and conservation, and in particular with regards to cattle production, including the concepts of land-sparing and land-sharing...
June 17, 2017: Environmental Management
https://www.readbyqxmd.com/read/28620680/landscape-climate-and-hantavirus-cardiopulmonary-syndrome-outbreaks
#7
REVIEW
Paula Ribeiro Prist, Paulo Sérgio D Andrea, Jean Paul Metzger
We performed a literature review in order to improve our understanding of how landscape and climate drivers affect HCPS outbreaks. Anthropogenic landscape changes such as forest loss, fragmentation and agricultural land uses are related with a boost in hantavirus reservoir species abundance and hantavirus prevalence in tropical areas, increasing HCPS risk. Additionally, higher precipitation, especially in arid regions, favors an increase in vegetational biomass, which augments the resources for reservoir rodents, also increasing HCPS risk...
June 15, 2017: EcoHealth
https://www.readbyqxmd.com/read/28620400/comparing-pixel-and-object-based-approaches-to-map-an-understorey-invasive-shrub-in-tropical-mixed-forests
#8
Madhura Niphadkar, Harini Nagendra, Cristina Tarantino, Maria Adamo, Palma Blonda
The establishment of invasive alien species in varied habitats across the world is now recognized as a genuine threat to the preservation of biodiversity. Specifically, plant invasions in understory tropical forests are detrimental to the persistence of healthy ecosystems. Monitoring such invasions using Very High Resolution (VHR) satellite remote sensing has been shown to be valuable in designing management interventions for conservation of native habitats. Object-based classification methods are very helpful in identifying invasive plants in various habitats, by their inherent nature of imitating the ability of the human brain in pattern recognition...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28618318/effect-of-differential-forest-management-on-land-use-change-luc-in-a-tropical-hill-forest-of-malaysia
#9
Kazi Mohammad Masum, Asyraf Mansor, Shahrul Anuar Mohd Sah, Hwee San Lim
Forest ownership is considered as a vital aspect for sustainable management of forest and its associated biodiversity. The Global Forest Resources Assessment 2015 reported that privately owned forest area are increasing on a global scale, but deforestation was found very active in privately owned hill forest areas of Malaysia. Penang State was purposively chosen as it has been experiencing rapid and radical changes due to urban expansion over the last three decades. In this study, analyses of land-use changes were done by PCI Geomatica using Landsat images from 1991 to 2015, future trends of land-use change were assessed using EXCEL forecast function, and its impact on the surrounding environment were conducted by reviewing already published articles on changing environment of the study area...
June 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28617841/height-diameter-allometry-and-above-ground-biomass-in-tropical-montane-forests-insights-from-the-albertine-rift-in-africa
#10
Gérard Imani, Faustin Boyemba, Simon Lewis, Nsharwasi Léon Nabahungu, Kim Calders, Louis Zapfack, Bernard Riera, Clarisse Balegamire, Aida Cuni-Sanchez
Tropical montane forests provide an important natural laboratory to test ecological theory. While it is well-known that some aspects of forest structure change with altitude, little is known on the effects of altitude on above ground biomass (AGB), particularly with regard to changing height-diameter allometry. To address this we investigate (1) the effects of altitude on height-diameter allometry, (2) how different height-diameter allometric models affect above ground biomass estimates; and (3) how other forest structural, taxonomic and environmental attributes affect above ground biomass using 30 permanent sample plots (1-ha; all trees ≥ 10 cm diameter measured) established between 1250 and 2600 m asl in Kahuzi Biega National Park in eastern Democratic Republic of Congo...
2017: PloS One
https://www.readbyqxmd.com/read/28617641/decreasing-stoichiometric-resource-quality-drives-compensatory-feeding-across-trophic-levels-in-tropical-litter-invertebrate-communities
#11
Malte Jochum, Andrew D Barnes, David Ott, Birgit Lang, Bernhard Klarner, Achmad Farajallah, Stefan Scheu, Ulrich Brose
Living organisms are constrained by both resource quantity and quality. Ecological stoichiometry offers important insights into how the elemental composition of resources affects their consumers. If resource quality decreases, consumers can respond by shifting their body stoichiometry, avoiding low-quality resources, or up-regulating feeding rates to maintain the supply of required elements while excreting excess carbon (i.e., compensatory feeding). We analyzed multitrophic consumer body stoichiometry, biomass, and feeding rates along a resource-quality gradient in the litter of tropical forest and rubber and oil-palm plantations...
July 2017: American Naturalist
https://www.readbyqxmd.com/read/28612939/using-soundscapes-to-detect-variable-degrees-of-human-influence-on-tropical-forests-in-papua-new-guinea
#12
Zuzana Burivalova, Michael Towsey, Tim Boucher, Anthony Truskinger, Cosmas Apelis, Paul Roe, Edward T Game
There is global concern about tropical forest degradation, in part, because of the associated loss of biodiversity. Communities and indigenous people play a fundamental role in tropical forest management and they are often efficient at preventing forest degradation. However, monitoring changes in biodiversity due to degradation, especially at a scale appropriate to local tropical forest management, is marred with difficulties including the need for expert training, inconsistency across observers, and the lack of baseline or reference data...
June 14, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28612166/biodegradation-of-pyrene-by-candida-sp-s1-under-high-salinity-conditions
#13
Tony Hadibarata, Ameer Badr Khudhair, Risky Ayu Kristanti, Hesam Kamyab
Polycyclic aromatic hydrocarbon is a toxic recalcitrant environmental pollutant and its removal from the environment is very essential. In this study, a novel S1 strain isolated from the tropical rain forest was identified as Candida species based on 18S rRNA. The pyrene biodegradation was performed by Candida sp. S1. Pyrene was 35% degraded in 15 days. The percentage of pyrene biodegradation increased up to 75% with 24 g L(-1) of sodium chloride and decreased along with increasing salinity. Under the acidic condition, the biodegradation was increased up to 60% at pH 5...
June 13, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28610380/a-cryptic-new-species-of-hummingbird-of-the-campylopterus-largipennis-complex-aves-trochilidae
#14
Leonardo Esteves Lopes, Marcelo Ferreira DE Vasconcelos, Luiz Pedreira Gonzaga
A new species of Campylopterus sabrewing is described from eastern Brazilian tropical dry forests occurring below 900 m asl. Its holotype (MZUSP 99024) is an adult female from Sítio Duboca (16°43'19''S, 43°58'20''W, elevation 840 m), municipality of Montes Claros, state of Minas Gerais. A taxonomic revision based on more than 1,000 museum specimens revealed that the new taxon, together with C. largipennis, C. diamantinensis and C. obscurus (with C. aequatorialis considered as a subjective junior synonym) should be ranked as species...
May 15, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610277/-i-helobdella-i-i-buzz-i-n-sp-clitellata-hirudinida-a-bromeliad-leech-from-the-brazilian-atlantic-forest
#15
Rafael Eiji Iwama, João Miguel DE Matos Nogueira, Ana Zangirolame Gonçalves
Tank bromeliads are important components of tropical forests and are capable of hosting many species of invertebrates in their tank water, such as insect larvae, ostracods and oligochaetes (Frank & Lounibos 2009; Jocque & Field 2014; Richardson 1999).
May 31, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610240/four-new-species-of-terrestrial-breeding-frogs-of-the-genus-i-phrynopus%C3%A2-i-anura-terrarana-craugastoridae-from-r%C3%A3-o-abiseo-national-park-peru
#16
Lily O Rodriguez, Alessandro Catenazzi
We describe four new species of terrestrial-breeding frogs belonging to the genus Phrynopus from specimens collected on the eastern slopes of the Cordillera Oriental (2800-3850 m) near and within Río Abiseo National Park, Provincia Mariscal Cáceres, Departments of San Martín and La Libertad, northeastern Peru. All four species lack a visible tympanum and inhabit the upper ridges and slopes within or adjacent to the Park. Phrynopus anancites sp. nov. and P. capitalis sp. nov. inhabit the wet montane grasslands on the upper ridges and valleys from 3600 to 3850 m...
June 6, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610195/three-new-species-of-i-pergalumna-i-acari-oribatida-galumnidae-from-the-tropical-rainforest-of-veracruz-mexico
#17
José G Palacios-Vargas, Fernando Villagomez
Three new species of oribatid mites of the genus Pergalumna from a tropical rain forest in Veracruz, Mexico are described. Pergalumna hypergranulosa sp. nov. differs from Pergalumna granulatus Balogh & Mahunka, 1967 by unilaterally barbulated bothridial setae, elongated notogastric porose areas, and also a more profuse granulation of the cerotegument. Pergalumna obsidiana sp. nov. differs from P. granulatus by the unilateral barbulation of bothridial setae and the presence of protuberances on the genital plates; from Pergalumna paralongisetosa Ermilov & Kalúz, 2012 by a diverging cerotegumental granulation on the notogaster...
March 9, 2017: Zootaxa
https://www.readbyqxmd.com/read/28607839/gamebird-responses-to-anthropogenic-forest-fragmentation-and-degradation-in-a-southern-amazonian-landscape
#18
Fernanda Michalski, Carlos A Peres
Although large-bodied tropical forest birds are impacted by both habitat loss and fragmentation, their patterns of habitat occupancy will also depend on the degree of forest habitat disturbance, which may interact synergistically or additively with fragmentation effects. Here, we examine the effects of forest patch and landscape metrics, and levels of forest disturbance on the patterns of persistence of six gamebird taxa in the southern Brazilian Amazon. We use both interview data conducted with long-term residents and/or landowners from 129 remnant forest patches and 15 continuous forest sites and line-transect census data from a subset of 21 forest patches and two continuous forests...
2017: PeerJ
https://www.readbyqxmd.com/read/28605868/different-responses-of-asymbiotic-nitrogen-fixation-to-nitrogen-addition-between-disturbed-and-rehabilitated-subtropical-forests
#19
Mianhai Zheng, Wei Zhang, Yiqi Luo, Taiki Mori, Qinggong Mao, Senhao Wang, Juan Huang, Xiankai Lu, Jiangming Mo
Asymbiotic nitrogen (N) fixation is an important source of new N in ecosystems, and is sensitive to atmospheric N deposition. However, there is limited understanding of asymbiotic N fixation and its response to N deposition in the context of forest rehabilitation. In this study, we measured N fixation rates (acetylene reduction) in different ecosystem compartments (i.e. soil, forest floor, moss Syrrhopodon armatus, and canopy leaves) in a disturbed and a rehabilitated subtropical forest in southern China, under 12years of N treatments: control, low N addition (50kgNha(-1)yr(-1)), and medium N addition (100kgNha(-1)yr(-1))...
June 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28594908/distribution-and-drivers-of-global-mangrove-forest-change-1996-2010
#20
Nathan Thomas, Richard Lucas, Peter Bunting, Andrew Hardy, Ake Rosenqvist, Marc Simard
For the period 1996-2010, we provide the first indication of the drivers behind mangrove land cover and land use change across the (pan-)tropics using time-series Japanese Earth Resources Satellite (JERS-1) Synthetic Aperture Radar (SAR) and Advanced Land Observing Satellite (ALOS) Phased Array-type L-band SAR (PALSAR) data. Multi-temporal radar mosaics were manually interpreted for evidence of loss and gain in forest extent and its associated driver. Mangrove loss as a consequence of human activities was observed across their entire range...
2017: PloS One
keyword
keyword
86404
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"