检索结果-南通市图书馆

Sustaining forest biodiversity:Exploring the effect of long-term natural disturbance dynamics on contemporary lichen communities in primary forest ecosystems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Forest Ecosystems 2024年第4期11卷 556-567页

作者： Rhiannon Gloor Marek Svitok martin Mikolas Jenyk Hofmeister Josef Halda Pavel Janda Francesco maria Sabatini Lucie Zemanova Arne Buechling Daniel Kozak Matej Ferencik Michal Frankovic martin Dusatko Miroslav Svoboda Department of Forest Ecology Faculty of Forestry and Wood SciencesCzech University of Life Sciences PragueKamycka 129Praha 6–Suchdol16500Czech Republic Faculty of Ecology and Environmental Sciences Technical University in ZvolenT.G.Masaryka 2496001ZvolenSlovakia Institute of Botany Plant Science and Biodiversity CenterSlovak Academy of SciencesDúbravska cesta 984523BratislavaSlovakia PRALES Odtrnovie 56301322RosinaSlovakia Faculty of Science University of Hradec KraloveHradecka 1285Hradec KraloveⅢ50003Czech Republic BIOME–Biogeography and Macroecology Department of BiologicalGeological and Environmental Sciences(BIGEA)Alma Mater Studiorum-University of Bolognavia Irnerio 42BolognaItaly

In this era of biodiversity loss and climate change,quantifying the impacts of natural disturbance on forest communities is imperative to improve biodiversity conservation *** and epixylic lichens are effective forest quality bioindicators,as they are generally long-lived organisms supported by continuity of specific forest structures and their associated microclimatic ***,how lichen communities respond to the effects of fluctuating historical disturbances remains *** a dendrochronological approach,this study investigates how natural disturbance dynamics indirectly influence various lichen community metrics in some of Europe's best-preserved primary mixed-beech *** modelling revealed that natural historical disturbance processes have decades-long effects on forest structural attributes,which had both congruent and divergent impacts on lichen community richness and *** species richness indirectly benefited from both historical and recent higher-severity disturbances via increased standing dead tree basal area and canopy openness respectively-likely through the presence of both pioneer and late-successional species associated with these ***-listed species richness showed a dependence on habitat continuity(old trees),and increased with disturbance-related structures(standing dead trees)whilst simultaneously benefiting from periods without severe disturbance events(old trees and reduced deadwood volume).However,if the disturbance occurred over a century in the past,no substantial effect on forest structure was ***,while disturbance-mediated forest structures can promote overall richness,threatened species appear vulnerable to more severe disturbance events-a concern,as disturbances are predicted to intensify with climate ***,the high number of threatened species found reinforce the critical role of primary forest structural attributes for biodiversity ***

关键词： Mixed-beech forests Species richness Old-growth forests Carpathian mountains Biodiversity conservation Dendroecology Fagus sylvatica

Exclusive breastfeeding greater than 50%, success of education in a university hospital in Bogotá: Case-control study

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Pediatrics 2024年第1期13卷 23-30页

作者： Marcela Murillo Galvis Sofia Ortegon Ochoa Clara Eugenia Plata García maria Paula Valderrama Junca Dayanna Alejandra Inga Ceballos Daniel Mauricio Mora Gómez Claudia M Granados martin Rondón Department of Pediatrics Hospital Universitario San IgnacioBogotá110111Colombia Department of Clinical Epidemiology and Biostatistics Pontifica Universidad JaverianaBogotá110111Colombia

BACKGROUND Maintenance rates of exclusive breastfeeding(EBF)worldwide are low,thus,one of the objectives of the summary of policies on breastfeeding(BF)in world nutrition goals for 2025 are that at least 50%of infants under six months of age receive EBF that *** Objective of this study is to document the rates of EBF in children born in San Ignacio University Hospital(HUSI)and identify factors associated with *** To document the percentages of EBF in those that were born at HUSI and identify factors associated to their *** This is a study of cases and controls in an analytic,retrospective cohort that took children born alive between January 2016 and January 2019 at HUSI located in the city of Bogotá,*** Receiving information about BF at HUSI was able to maintain EBF up until 4 mo(OR=1.65;95%CI:1.02-2.66).The presence of gynecologic and obstetric comorbidities(OR=0.32;95%CI:0.12-0.83),having mastitis(OR=0.56;95%CI:0.33-0.94),and receiving information from mass media(OR=0.52;95%CI:0.31-0.84)are factors associated with not maintaining *** Receiving education at a Women-and Child-Friendly Institution was the only significant factor to achieve EBF until 4 mo,with a frequency greater than the one reported in the country,which matches multiple studies where counseling and individualized support on BF achieve this *** about BF and early detection of obstetric/gynecologic complications must be strengthened among the healthcare staff in charge of mothers during ***,strategies must be promoted to continue BF such as creating milk banks with the objective of increasing BF rates even when mothers return to work.

关键词： Breastfeeding Women-and Child-Friendly Institutional Strategy Strategies Adherence Education

Changes in call properties of Boana pulchella (Anura, Hylidae) in response to different noise conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2024年第4期70卷 548-556页

作者： Pablo Grenat maria Ferrero mariana Baraquet Favio Pollo Manuel Otero Zulma Salinas Nancy Salas Adolfo martino Ecologia Departamento de Ciencias NaturalesFacultad de Ciencias ExactasFisico-Quimicas y NaturalesUniversidad Nacional de Rio CuartoRutaNacional N°36-km601X5804BYARioCuartoArgentina lnstituto de Ciencias de la Tierra Biodiversidad y Ambiente(ICBIA)UNRC-CONICETRuta Nacional N°36-km 601X5804BYARio CuartoArgentina Cátedra de Botanica General Departamento de Recursos Naturales y AmbienteFacultad de AgronomiaUniversidad de Buenos AiresAv.San Martin 4453Buenos AiresArgentina

The increasing expansion of urban areas leads to the emergence of new noisy environments that can affect animal *** play a crucial role in the mating displays of anurans,and the negative impact of anthropogenic noise-induced auditory masking has been reported in several *** investigated the acoustic variation in 96 males(n=971 calls)of the treefrog Boana pulchella across acoustically undis-turbed sites and different noise conditions,associated with urban areas(URBAN)and roads(ROAD),in Central *** analyzed the effect of anthropogenic noise conditions on 6 temporal(call duration[CD],intercall interval,first and second note duration,internote interval,and call rate)and 3 spectral(dominant frequency of first and second note,frequency difference between them)call *** effects of temperature and size on acoustical variables were *** observed differences in all call attributes among the noise conditions,except for intercall *** exposed to URBAN and ROAD exhibited significant changes in CD,dominant frequency of the second note,and fre-quency difference between *** males had longest internote interval,while ROAD individuals displayed increased first and second note duration and call ***,ROAD males exhibited immediate changes in call rate in direct response to passing heavy *** study emphasizes the impact of anthropogenic noise on the acoustic characteristics of *** *** how animals adapt to noisy environments is crucial in mitigating the adverse effects of urbanization on their communication *** investigations should explore whether the observed call adjustments are effective in avoiding or mitigating the negative consequences of anthropogenic noise on reproductive success.

关键词： acoustic communication advertisement call auditory masking noise pollution road traffic noise.

Intrasexual competition enhances reproductive isolation between locally adapted populations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2018年第1期64卷 125-133页

作者： David BIERBACH Lenin arias-RODRIGUEZ martin PLATH Department of Biology and Ecology of Fishes Leibniz-lnstitute of Freshwater Ecology and Inland Fisheries Muggelseedamm 310 12587 Berlin Germany Division Academica de Ciencias Biologicas Universidad Juarez Autonoma de Tabasco (UJAT) 86150 Villahermosa Tabasco Mexico College of Animal Science and Technology Northwest A&F University Yangling Shaanxi 712100 China

During adaptation to different habitat types, both morphological and behavioral traits can undergo divergent selection. Males often fight for status in dominance hierarchies and rank positions predict reproductive success. Ecotypes with reduced fighting abilities should have low reproductive success when migrating into habitats that harbor ecotypes with superior fighting abilities. Livebearing fishes in the Poecilia mexicana-species complex inhabit not only regular freshwater environments, but also independently colonized sulfidic （H2S-containing） habitats in three river drainages. In the current study, we found fighting intensities in staged contests to be considerably lower in some but not all sulfidic surface ecotypes and the sulfidic cave ecotype compared with populations from non-sulfidic surface sites. This is perhaps due to selection imposed by H2S, which hampers oxygen uptake and transport, as well as cellular respiration. Furthermore, migrants from sulfidic habitats may lose fights even if they do not show overall reduced aggressiveness, as phys- iological performance is likely to be challenged in the non-sulfidic environment to which they are not adapted. To test this hypothesis, we simulated migration of H2S-adapted males into H2S-free waters, as well as H2S-adapted cave-dwelling males into sulfidic surface waters. We found that intruders established dominance less often than resident males, independent of whether or not they showed reduced aggressiveness overall. Our study shows that divergent evolution of male aggressive behavior may also contribute to the maintenance of genetic differentiation in this system and we call for more careful evaluation of male fighting abilities in studies on ecological speciation.

关键词： ecological speciation extremophile teleost local adaptation Poecilia premating isolation selection againstmigrants.

Feeding Calcium Salts of Linseed Oil on Metabolic Status and Reproductive Traits in Grazing Dairy Cows

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Animal Sciences 2024年第3期14卷 219-233页

作者： Jesica Daniela Iorio Yaliska Moreno González maria Florencia Olmeda Dino Curletto Daniel Edgardo Scandolo martin Guillermo Maciel Rafael Alejandro Palladino Mauricio Javier Giuliodori Eloy Eduardo Salado School of Agriculture of the University of Buenos Aires (FAUBA) Buenos Aires Argentina Faculty of Agricultural Sciences National University of Lomas de Zamora (UNLZ) Lomas de Zamora Argentina Rafaela Agricultural Experiment Station National Institute of Agricultural Technology (INTA) Rafaela Argentina Faculty of Veterinary Science La Plata National University (FCV) La Plata Argentina

This experiment aimed to evaluate the effect of calcium salts of linseed oil (rich in alpha-linolenic acid (ALA, C18:3n-3) on metabolic and reproductive traits in high-producing dairy cows under grazing. Thirty-six Holstein dairy cows were randomly assigned, in a complete block design, to receive ALA supplementation (0.85 kg∙day−1 of calcium salts of linseed oil) or to remain as untreated control (CON). The concentrate was formulated to offer the same amount of energy across treatments (CON cows received an extra kg of corn to compensate for the higher energy density of ALA treatment). A PMR + Alfalfa pasture was offered to all cows at the same time. A fixed time artiﬁcial insemination (FTAI) at 80 DIM, preceded by a Presynch plus Ovsynch protocol was implemented for the first service and later, on return to estrus, heat detection and artiﬁcial insemination (AI) were performed. Pregnancy diagnosis was checked at 30, 42, 60, and 90 d after AI. Blood and milk samples were taken biweekly. Treatment affected plasma cholesterol concentration (160.36 vs. 186.70 mg∙dl−1, p = 0.03, for ALA and CON, respectively) and on size of corpus luteum (CL, 17.6 vs. 13.7 mm, p = 0.02, for ALA and CON, respectively). Supplementation tended (p = 0.136) to increase conception rate by 200 DIM (81.69% vs. 55.43% in ALA and CON cows, respectively). However, treatment had no effect (p > 0.05) on body weight (BW), body condition score (BCS), and circulating levels of beta-hydroxybutyrate (BHBA), glucose, insulin, growth hormone (GH) and insulin-like growth factor (IGF-I). Our results suggest that supplementation with calcium salts of linseed oil could enhance ovarian function without affecting energy metabolism in early lactation dairy cows.

关键词： α-Linolenic Acid Supplementation Reproduction Grazing Dairy Cows

Effects of Imazethapyr-Based Herbicide Formulation in the Zebrafish (Danio rerio) Hepatocyte Cell Line (ZF-L): Cytotoxicity and Oxidative Stress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2024年第6期15卷 747-765页

作者： Edila maria Kickhöfel Ferrer Milena Mattes Cerveira Pedro Henrique Flores Da Cruz Cleiton Jesus Andrade Pereira Lucas Moraes Berneira Claudio martin Pereira de Pereira Nathalia Stark Pedra Roselia maria Spanevello Jean Carlos Bauer Vieira Clarissa Piccinin Frizzo Mateus Tavares Kütter Janice Luehring Giongo Rodrigo de Almeida Vaucher Center of Chemical Pharmaceutical and Food Sciences Microorganism Biochemistry and Molecular Biology Research Laboratory (LAPEBBIOM) Federal University of Pelotas (UFPEL) Pelotas Rio Grande do Sul Brazil Center of Chemical Pharmaceutical and Food Sciences Laboratory for Lipidomic and Bio-Organic Research Bioforensic Research Group Federal University of Pelotas (UFPEL) Pelotas Rio Grande do Sul Brazil Center of Chemical Pharmaceutical and Food Sciences Neurochemistry Inflammation and Cancer Laboratory Federal University of Pelotas (UFPEL) Pelotas Rio Grande do Sul Brazil Department of Chemistry Heterocycle Chemistry Center (NUQUIMHE) Federal University of Santa Maria (UFSM) Santa Maria Rio Grande do Sul Brazil Department of Microbiology and Parasitology Biology Institute Federal University of Pelotas (UFPEL) Pelotas Rio Grande do Sul Brazil

Seizures of agrochemical formulations have increased in Brazil and Rio Grande do Sul is among the Brazilian states with the highest number of seizures of these products obtained illicitly. The use of illicit formulations can cause significant harm to agricultural production, the environment, and non-target species. This study evaluated the cytotoxicity and oxidative stress of a seized formulation containing the herbicide imazethapyr (IMZT). Characterization of the herbicide included gas chromatography-mass spectrometry (GC-MS) and thermal analyses (thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC)). Hemolytic and cytotoxicity assays in ZF-L hepatic cells showed IC50 values of 12.75 µg/mL, 3.01 µg/mL, 2.67 µg/mL, and 1.61 µg/mL for erythrocytes, [3(4,5-dimethyl)-2 bromide-5 diphenyl tetrazolium] (MTT), neutral red (NR), and lactate dehydrogenase (LDH) assays, respectively. The median IC50 of 2.84 µg/mL was used in oxidative stress assays, revealing increased reactive oxygen species (ROS) production, reduced total sulfhydryl content, and decreased superoxide dismutase (SOD) and catalase (CAT) activity. This study is the first to report in vitro oxidative stress induced by IMZT in the ZF-L cell line, emphasizing the importance of in vitro assays for assessing the toxic effects of seized agrochemicals on human health and the environment.

关键词： Agrochemical Imidazolinone Zebrafish Cell Viability Oxidative Damage

Role of seed size, phenology, oogenesis and host distribution in the specificity and genetic structure of seed weevils (Curculio spp.) in mixed forests

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2018年第3期13卷 267-279页

作者： Harold arias-LECLAIRE Raúl BONAL Daniel GARCÍA-LÓPEZ Josep maria ESPELTA CREAF Centre for Ecological Research and Forestry ApplicationsCerdanyola del Vallès08193Spain Exact and Natural Sciences School State Distance University of Costa RicaUNEDMercedes de Montes de OcaSan JoséCosta Rica Forest Research Group INDEHESAUniversity of ExtremaduraPlasenciaSpain DITEG Research Group University of Castilla-La ManchaToledoSpain Zoology Department Autonomous University of BarcelonaCerdanyola del VallèsSpain

Synchrony between seed growth and oogenesis is suggested to largely shape trophic breadth of seed-feeding insects and ultimately to contribute to their co-existence by means of resource partitioning or in the time when infestation *** we investigated:(i)the role of seed phenology and sexual maturation of females in the host specificity of seed-feeding weevils(Curculio spp.)predating in hazel and oak mixed forests;and(ii)the consequences that trophic breadth and host distribution have in the genetic structure of the weevil *** analyses were used to establish unequivocally host specificity and to determine the population genetic *** identified 4 species with different specificity,namely Curculio nucum females matured earlier and infested a unique host(hazelnuts,Corylus avellana)while 3 species(Curculio venosus,Curculio glandium and Curculio elephas)predated upon the acorns of the 2 oaks(Quercus ilex and Quercus pubescens).The high specificity of *** coupled with a more discontinuous distribution of hazel trees resulted in a significant genetic structure among *** addition,the presence of an excess of local rare haplotypes indicated that *** populations went through genetic expansion after recent ***,these effects were not observed in the more generalist Curculio glandium predating upon ***,co-existence of weevil species in this multi-host-parasite system is influenced by both resource and time *** what extent the restriction in gene flow among *** populations may have negative consequences for their persistence in a time of increasing disturbances(*** in Mediterranean areas)deserves further research.

关键词： Corylus avellana Curculio spp. genetic structure Quercus spp. trophic breadth

Effect of Milling and Parboiling Processes on Arsenic Species Distribution in Rice Grains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rice science 2021年第4期28卷 402-408,I0035-I0037页

作者： maria Chiara Fontanella maria martin Daniele TENNI Gian maria Beone Marco Romani Department for Sustainable Food Process Catholic University of Sacred Heart of PiacenzaPiacenza 29100Italy Department of Agricultural Forest and Food SciencesUniversity of TorinoTorino 10095Italy Rice Research Center National Rice BoardCastello d’Agogna 27030Italy

This study identified the role of milling and parboiling on arsenic(As)content and its species in large numbers of rice *** As contents were 108±33μg/kg in polished rice grains(PR),159±46μg/kg in unpolished rice grains(UR),145±42μg/kg in parboiled polished rice grains(PPR)and 145±44μg/kg in parboiled unpolished rice grains(PUR).The percentages of inorganic As(iAs)were 66%±8%in PR and from 72%to 77%in other grain *** polishing process reduced the As content in the rice grains,removing outer part of the UR with high amount of As,whereas the parboiling technique transferred the semimetal content within the *** As and iAs contents were not significantly different in UR,PPR and PUR,homogenizing its distribution inside the *** results allowed to understand how different operations affect As fate and its chemical forms in grains.

关键词： rice arsenic inductively coupled plasma-mass spectrometer milling parboiling laser ablation

Face Labelings of Klein-bottle Fullerenes

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2017年第2期33卷 277-286页

作者： martin BACA maria NASEEM Ayesha SHABBIR Department of Appl. Mathematics and Informatics Technical University Kosice Slovakia Abdus Salam School of Mathematical Sciences GC University 68-B New Muslim Town Lahore Pakistan University College of Engineering Sciences and Technology Lahore Leads University Lahore Pakistan

The Klein-bottle fullerene is a finite trivalent graph embedded on the Klein-bottle such that each face is a hexagon. The paper deals with the problem of labeling the vertices, edges and faces of the Klein-bottle fullerene in such a way that the label of a face and the labels of the vertices and edges surrounding that face add up to a weight of that face and the weights of all 6-sided faces constitute an arithmetic progression of difference d. In this paper we study the existence of such labelings for several differences d.

关键词： Klein-bottle fullerene d-antimagic labeling super d-antimagic labeling