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https://www.readbyqxmd.com/read/29353173/use-of-cu-zn-superoxide-dismutase-tool-for-biomonitoring-marine-environment-pollution-in-the-persian-gulf-and-the-gulf-of-oman
#1
Farrokhzad Zeinali, Ahmad Homaei, Ehsan Kamrani, Seema Patel
Superoxide dismutase (SOD) is the pivotal antioxidant enzyme that defends organisms against the oxidative stresses of superoxide radicals. In this experimental study, purification of SOD from the leaves of Avicennia marina (grey mangrove or white mangrove) from the family Acanthaceae, located in Sirik mangrove forest on the shore of the Gulf of Oman was performed, for the intended characterization of SOD. The Sirik AmSOD (A. marina SOD) expressed optimum activity in the pH range of 6-9 with the maximum activity at pH 8...
January 16, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29350136/ecologic-features-of-plague-outbreak-areas-democratic-republic-of-the-congo-2004-2014
#2
Aaron Aruna Abedi, Jean-Christophe Shako, Jean Gaudart, Bertrand Sudre, Benoit Kebela Ilunga, Stomy Karhemere Bi Shamamba, Georges Diatta, Bernard Davoust, Jean-Jacques Muyembe Tamfum, Renaud Piarroux, Martine Piarroux
During 2004-2014, the Democratic Republic of the Congo (DRC) declared 54% of plague cases worldwide. Using national data, we characterized the epidemiology of human plague in DRC for this period. All 4,630 suspected human plague cases and 349 deaths recorded in DRC came from Orientale Province. Pneumonic plague cases (8.8% of total) occurred during 2 major outbreaks in mining camps in the equatorial forest, and some limited outbreaks occurred in the Ituri highlands. Epidemics originated in 5 health zones clustered in Ituri, where sporadic bubonic cases were recorded throughout every year...
February 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29343593/lizards-of-the-lost-arcs-mid-cenozoic-diversification-persistence-and-ecological-marginalization-in-the-west-pacific
#3
Paul M Oliver, Rafe M Brown, Fred Kraus, Eric Rittmeyer, Scott L Travers, Cameron D Siler
Regions with complex geological histories often have diverse and highly endemic biotas, yet inferring the ecological and historical processes shaping this relationship remains challenging. Here, in the context of the taxon cycle model of insular community assembly, we investigate patterns of lineage diversity and habitat usage in a newly characterized vertebrate radiation centred upon the world's most geologically complex insular region: island arcs spanning from the Philippines to Fiji. On island arcs taxa are ecologically widespread, and provide evidence to support one key prediction of the taxon cycle, specifically that interior habitats (lowland rainforests, montane habitats) are home to a greater number of older or relictual lineages than are peripheral habitats (coastal and open forests)...
January 31, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29336678/phylogeny-and-diversity-of-the-morphologically-similar-polypore-genera-rigidoporus-physisporinus-oxyporus-and-leucophellinus
#4
Fang Wu, Jia-Jia Chen, Xiao-Hong Ji, Josef Vlasák, Yu-Cheng Dai
Rigidoporus and its morphologically similar genera Physisporinus, Oxyporus, and Leucophellinus, which include some forest pathogens and medicinal species, are very important groups of wood-decaying fungi. Species of these genera have not only ecological functions, but also economic importance. Phylogenetic and taxonomic studies on taxa in these genera were carried out. Inferred from phylogenies based on DNA sequences of the nuc rDNA ITS1-5.8S-ITS2 (internal transcribed spacer [ITS]) and D1-D2 domains of nuc 28S rDNA, 36 species sampled that traditionally belong to Physisporinus, Rigidoporus, Leucophellinus, and Oxyporus are nested mostly in eight lineages...
November 20, 2017: Mycologia
https://www.readbyqxmd.com/read/29335873/agricultural-non-point-source-pollution-management-in-a-reservoir-watershed-based-on-ecological-network-analysis-of-soil-nitrogen-cycling
#5
Wen Xu, Yanpeng Cai, Qiangqiang Rong, Zhifeng Yang, Chunhui Li, Xuan Wang
The Miyun Reservoir plays a pivotal role in providing drinking water for the city of Beijing. In this research, ecological network analysis and scenario analysis were integrated to explore soil nitrogen cycling of chestnut and Chinese pine forests in the upper basin of the Miyun Reservoir, as well as to seek favorable fertilization modes to reduce agricultural non-point source pollution. Ecological network analysis results showed that (1) the turnover time was 0.04 to 0.37 year in the NH4+ compartment and were 15...
January 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29335417/europe-s-lost-forests-a-pollen-based-synthesis-for-the-last-11-000-years
#6
N Roberts, R M Fyfe, J Woodbridge, M-J Gaillard, B A S Davis, J O Kaplan, L Marquer, F Mazier, A B Nielsen, S Sugita, A-K Trondman, M Leydet
8000 years ago, prior to Neolithic agriculture, Europe was mostly a wooded continent. Since then, its forest cover has been progressively fragmented, so that today it covers less than half of Europe's land area, in many cases having been cleared to make way for fields and pasture-land. Establishing the origin of Europe's current, more open land-cover mosaic requires a long-term perspective, for which pollen analysis offers a key tool. In this study we utilise and compare three numerical approaches to transforming pollen data into past forest cover, drawing on >1000 14C-dated site records...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29324901/the-relationship-between-species-richness-and-aboveground-biomass-in-a-primary-pinus-kesiya-forest-of-yunnan-southwestern-china
#7
Shuaifeng Li, Xuedong Lang, Wande Liu, Guanglong Ou, Hui Xu, Jianrong Su
The relationship between biodiversity and biomass is an essential element of the natural ecosystem functioning. Our research aims at assessing the effects of species richness on the aboveground biomass and the ecological driver of this relationship in a primary Pinus kesiya forest. We sampled 112 plots of the primary P. kesiya forests in Yunnan Province. The general linear model and the structural equation model were used to estimate relative effects of multivariate factors among aboveground biomass, species richness and the other explanatory variables, including climate moisture index, soil nutrient regime and stand age...
2018: PloS One
https://www.readbyqxmd.com/read/29322322/functional-traits-can-improve-our-understanding-of-niche-and-dispersal-based-processes
#8
Feng Jiang, Yanhan Xun, Huiying Cai, Guangze Jin
Ecologists often determine the relative importance of niche- and dispersal-based processes via variation partitioning based on species composition. Functional traits and their proxies of phylogeny are expected to increase the detection of niche-based processes and reduce the unexplained variation relative to species identity. We collected eight adult tree traits and phylogenetic data of 41 species and employed a phylogenetic fuzzy weighting method to address this issue in a 9-ha temperate forest dynamics plot...
January 10, 2018: Oecologia
https://www.readbyqxmd.com/read/29321892/regional-patterns-of-declining-butternut-juglans-cinerea-l-suggest-site-characteristics-for-restoration
#9
Randall S Morin, Kurt W Gottschalk, Michael E Ostry, Andrew M Liebhold
Butternut trees dying from a canker disease were first reported in southwestern Wisconsin in 1967. Since then, the disease has caused extensive mortality of butternut throughout its North American range. The objectives of this study were to quantify changes in butternut populations and density across its range and identify habitat characteristics of sites where butternut is surviving in order to locate regions for potential butternut restoration. The natural range of butternut (Juglans cinerea L.) extends over a large region of eastern N...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321891/population-genetic-structure-of-the-endemic-rosewoods-dalbergia-cochinchinensis-and-d-%C3%A2-oliveri-at-a-regional-scale-reflects-the-indochinese-landscape-and-life-history-traits
#10
Ida Hartvig, Thea So, Suchitra Changtragoon, Hoa Thi Tran, Somsanith Bouamanivong, Ida Theilade, Erik Dahl Kjær, Lene Rostgaard Nielsen
Indochina is a biodiversity hot spot and harbors a high number of endemic species, most of which are poorly studied. This study explores the genetic structure and reproductive system of the threatened endemic timber species Dalbergia cochinchinensis and Dalbergia oliveri using microsatellite data from populations across Indochina and relates it to landscape characteristics and life-history traits. We found that the major water bodies in the region, Mekong and Tonle Sap, represented barriers to gene flow and that higher levels of genetic diversity were found in populations in the center of the distribution area, particularly in Cambodia...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321885/climate-change-affecting-oil-palm-agronomy-and-oil-palm-cultivation-increasing-climate-change-require-amelioration
#11
REVIEW
R Russell M Paterson, Nelson Lima
Palm oil is used in various valued commodities and is a large global industry worth over US$ 50 billion annually. Oil palms (OP) are grown commercially in Indonesia and Malaysia and other countries within Latin America and Africa. The large-scale land-use change has high ecological, economic, and social impacts. Tropical countries in particular are affected negatively by climate change (CC) which also has a detrimental impact on OP agronomy, whereas the cultivation of OP increases CC. Amelioration of both is required...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321872/relative-contribution-of-neutral-and-deterministic-processes-in-shaping-fruit-feeding-butterfly-assemblages-in-afrotropical-forests
#12
Kwaku Aduse-Poku, Freerk Molleman, William Oduro, Samuel K Oppong, David J Lohman, Rampal S Etienne
The unified neutral theory of biodiversity and biogeography has gained the status of a quantitative null model for explaining patterns in ecological (meta)communities. The theory assumes that individuals of trophically similar species are functionally equivalent. We empirically evaluate the relative contribution of neutral and deterministic processes in shaping fruit-feeding butterfly assemblages in three tropical forests in Africa, using both direct (confronting the neutral model with species abundance data) and indirect approaches (testing the predictions of neutral theory using data other than species abundance distributions)...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321850/bird-species-richness-is-associated-with-phylogenetic-relatedness-plant-species-richness-and-altitudinal-range-in-inner-mongolia
#13
Chenxia Liang, Gang Feng, Xingfeng Si, Lingfeng Mao, Guisheng Yang, Jens-Christian Svenning, Jie Yang
Bird species richness is mediated by local, regional, and historical factors, for example, competition, environmental heterogeneity, contemporary, and historical climate. Here, we related bird species richness with phylogenetic relatedness of bird assemblages, plant species richness, topography, contemporary climate, and glacial-interglacial climate change to investigate the relative importance of these factors. This study was conducted in Inner Mongolia, an arid and semiarid region with diverse vegetation types and strong species richness gradients...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321479/contrasting-patterns-of-leaf-trait-variation-among-and-within-species-during-tropical-dry-forest-succession-in-costa-rica
#14
Géraldine Derroire, Jennifer S Powers, Catherine M Hulshof, Luis E Cárdenas Varela, John R Healey
A coordinated response to environmental drivers amongst individual functional traits is central to the plant strategy concept. However, whether the trait co-ordination observed at the global scale occurs at other ecological scales (especially within species) remains an open question. Here, for sapling communities of two tropical dry forest types in Costa Rica, we show large differences amongst traits in the relative contribution of species turnover and intraspecific variation to their directional changes in response to environmental changes along a successional gradient...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320514/sound-mapping-a-coniferous-forest-perspectives-for-biodiversity-monitoring-and-noise-mitigation
#15
Anthony Turner, Michael Fischer, Joseph Tzanopoulos
Acoustic diversity indices have been proposed as low-cost biodiversity monitoring tools. The acoustic diversity of a soundscape can be indicative of the richness of an acoustic community and the structural/vegetation characteristics of a habitat. There is a need to apply these methods to landscapes that are ecologically and/or economically important. We investigate the relationship between the acoustic properties of a coniferous forest with stand-age and structure. We sampled a 73 point grid in part of the UK's largest man-made lowland coniferous plantation forest, covering a 320ha mosaic of different aged stands...
2018: PloS One
https://www.readbyqxmd.com/read/29312813/domestic-carnivore-interactions-with-wildlife-in-the-cape-horn-biosphere-reserve-chile-husbandry-and-perceptions-of-impact-from-a-community-perspective
#16
Elke Schüttler, Lorena Saavedra-Aracena, Jaime E Jiménez
Background: Hundreds of millions of domestic carnivores worldwide have diverse positive affiliations with humans, but can provoke serious socio-ecological impacts when free-roaming. Unconfined dogs (Canis familiaris) and cats (Felis catus) interact with wildlife as predators, competitors, and disease-transmitters; their access to wildlife depends on husbandry, perceptions, attitudes, and behaviors of pet owners and non-owners. Methods: To better understand husbandry and perceptions of impacts by unconfined, domestic carnivores, we administered questionnaires (n = 244) to pet owners and non-owners living in one of the last wilderness areas of the world, the Cape Horn Biosphere Reserve, located in southern Chile...
2018: PeerJ
https://www.readbyqxmd.com/read/29305657/keystone-mutualism-strengthens-top-down-effects-by-recruiting-large-bodied-ants
#17
Robert E Clark, Michael S Singer
Determining the impacts of mutualistic interactions and predator diversity on food webs are two important goals in community ecology. In this study, we examined how predator community variation mediates the strength of top-down effects in the presence and absence of mutualistic interactions. We examined the impacts of predatory ant species that simultaneously prey on leaf-chewing herbivores (Lepidoptera) and engage in food-for-protection mutualisms with sap-feeding herbivores (Hemiptera) in the lower canopy of Connecticut forests...
January 6, 2018: Oecologia
https://www.readbyqxmd.com/read/29304165/genetic-diversity-genetic-structure-and-diet-of-ancient-and-contemporary-red-deer-cervus-elaphus-l-from-north-eastern-france
#18
Annik Schnitzler, José Granado, Olivier Putelat, Rose-Marie Arbogast, Dorothée Drucker, Anna Eberhard, Anja Schmutz, Yuri Klaefiger, Gérard Lang, Walter Salzburger, Joerg Schibler, Angela Schlumbaum, Hervé Bocherens
In north-eastern France, red deer (Cervus elaphus L.) populations were rebuilt from a few hundred individuals, which have subsisted in remote valleys of the Vosges mountains, and to a lesser extent from individuals escaped from private enclosures; at present times, this species occupies large areas, mainly in the Vosges Mountains. In this study, we examined the population dynamics of red deer in the Vosges Mountains using ancient and contemporary mitochondrial DNA (mtDNA) from 140 samples (23 ancient + 117 modern) spanning the last 7'000 years...
2018: PloS One
https://www.readbyqxmd.com/read/29299274/cryptic-genetic-variation-in-an-inbreeding-and-cosmopolitan-pest-xylosandrus-crassiusculus-revealed-using-ddradseq
#19
Caroline Storer, Adam Payton, Stuart McDaniel, Bjarte Jordal, Jiri Hulcr
Each year new exotic species are transported across the world through global commerce, causing considerable economic and ecological damage. An important component of managing invasion pathways is to identify source populations. Some of the most widespread exotic species are haplodiploid ambrosia beetles. The ability to mate with siblings (inbreed) and their transportable food source (symbiotic fungus) have enabled them to colonize most of the world and become pests of plant nurseries, lumber, and forests. One of the fastest spreading ambrosia beetles is Xylosandrus crassiusculus...
December 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29299273/does-forest-extent-affect-salamander-survival-evidence-from-a-long-term-demographic-study-of-a-tropical-newt
#20
Anthony Lau, Nancy E Karraker, David Dudgeon
Forest loss has been associated with reduced survival in many vertebrates, and previous research on amphibians has mostly focused on effects at early life stages. Paramesotriton hongkongensis is a tropical newt that breeds in streams but spends up to 10 months per year in terrestrial habitats. Populations are threatened by habitat degradation and collection for the pet trade, but the cryptic terrestrial lifestyle of this newt has limited our understanding of its population ecology, which inhibits development of a species-specific conservation plan...
December 2017: Ecology and Evolution
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