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Shade coffee plantations maintain woody plant diversity and structure in a cloud forest landscape of southern Mexico

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Journal of Forestry Research 2021年第2期32卷 637-648页

作者： Edson AAlvarez-Alvarez R.Carlos Almazán-Nunez Fernando González-García Marlene Brito-Millán Alfredo Méndez-Bahena Sergio García-Ibáñez Maestría en Recursos Naturales y Ecología Facultad de Ecología MarinaUniversidad Autónoma de Guerrero39390 AcapulcoGuerreroMexico laboratorio Integral de Fauna Silvestre Facultad de Ciencias Químico-BiológicasUniversidad Autónoma de Guerrero39090 Chilpancingo de los BravoGuerreroMexico Red biología y Conservación de Vertebrados Instituto de EcologíaA.C.CP 91073 XalapaVeracruzMexico University of California Institute for Mexico and the United States(UC MEXUS) Cuerpo Académico Biodiversidad y Gestión Ambiental SustentableFacultad de Ciencias Químico-BiológicasUniversidad Autónoma de Guerrero39090 Chilpancingo de los BravoGuerreroMexico laboratorio de biología de la Conservación Facultad de Ciencias Químico-BiológicasUniversidad Autónoma de Guerrero39090 Chilpancingo de los BravoGuerreroMexico laboratorio de Ecología Cuantitativa Facultad de Ecología MarinaUniversidad Autónoma de Guerrero39390 AcapulcoGuerreroMexico

Cloud forest ecosystems of the Latin American tropics are highly threatened by changes in land-use such as expanding croplands and livestock pastures that promote shifts in the structure and composition of plant communities in these ***,shade coffee plantations represent a forest management alternative that has been shown to maintain biodiversity in these *** this study,we evaluated changes in the composition,diversity,and structure of Mexican cloud-forest woody species for three land use categories:cattle pastures,shade coffee plantations and advanced succession *** each category,fifteen 0.28-ha plots were established and the composition and diversity of vegetation was *** of species was analyzed using ordination methods,and alpha diversity was compared using Hill ***-seven woody species belonging to 40 families were *** richness and diversity was high in both the advanced successional forest and coffee plantations compared to cattle *** composition and structure was similar between late succession forests and coffee plantations with both land uses also being more structurally complex than cattle *** results show how shade coffee cultivation is a land-use activity that maintains woody plant communities in a manner that aligns with biodiversity conservation.

关键词： Land uses Late succession Plant diversity Shade coffee Vegetation structure

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Differential expression of the fractalkine chemokine receptor （CX3CR 1） in human rnonocytes during differentiation

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Cellular & Molecular Immunology 2015年第6期12卷 669-680页

作者： Cecilia Analia Panek Maria Victoria Ramos Maria Pilar Mejias Maria Iimena Abrey-Recalde Romina Iimena Fernandez-Brando Maria Soledad Gori Gabriela Veronica Salamone2 marina Sandra Palermo laboratorio de Patogenesis e Inmunologfa de Procesos Infecciosos Instituto de Medicina Experimental (IMEX CONICET) Academia Nacional de Medicina Buenos Aires Argentina and laboratorio de Celulas Presentadoras de Antfgeno y Respuesta Inflamatoria IMEX-CONICET Academia Nacional de Medicina Buenos Aires Argentina

Circulating monocytes （Mos） may continuously repopulate macrophage （MAC） or dendritic cell （DC） populations to maintain homeostasis. MACs and DCs are specialized cells that play different and complementary immunological functions. Accordingly, they present distinct migratory properties. Specifically, whereas MACs largely remain in tissues, DCs are capable of migrating from peripheral tissues to lymphoid organs. The aim of this work was to analyze the expression of the fractalkine receptor （CX3CR1） during the monocytic differentiation process. Freshly isolated Mos express high levels of both CX3CR1 mRNA and protein. During the Mo differentiation process, CX3CR1 is downregulated in both DCs and MACs. However, MACs showed significantly higher CX3CR1 expression levels than did DC. We also observed an antagonistic CX3CR1 regulation by interferon （IFN）-γ and interleukin （IL）-4 during MAC activation through the classical and alternative MAC pathways, respectively. IFN-γinhibited the loss of CX3CR1, but IL-4 induced it. Additionally, we demonstrated an association between CX3CR1 expression and apoptosis prevention by soluble fractalkine （sCX3CL1） in Mos, DCs and MACs. This is the first report demonstrating sequential and differential CX3CR1 modulation during Mo differentiation. Most importantly, we demonstrated a functional link between CX3CR1 expression and cell survival in the presence of sCX3CL1.

关键词： dendritic cells fractalkine receptor macrophages monocytes survival

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Organophosphate Pesticides in Coastal Lagoon of the Gulf of Mexico

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Journal of Environmental Protection 2019年第2期10卷 103-117页

作者： Guadalupe Ponce-Vélez Guadalupe de la Lanza-Espino laboratorio de Contaminación marina Instituto de Ciencias del Mar y Limnología Universidad Nacional Autónoma de México Mexico City Méxio laboratorio de Hidrobiología Instituto de Biología Universidad Nacional Autónoma de México Mexico City México

The worldwide use of semi-persistent organophosphate pesticides has become increasingly frequent and notorious. Their presence is registered in both continental and coastal waters;the latter ones are known for their subtly balanced environmental richness, difficult to recover once lost. These xenobiotics compounds reach the coastal zone through rivers that have crossed human settlements, as well as through peripheral run-off water used to exterminate agricultural pests. In Mexico, a developing country, the use of pesticides for several decades has not been adequately regulated, which is why various coastal ecosystems are the accumulation areas of these agrochemicals used in the continent. In the Gulf of Mexico, one of the coastal systems of high fishing importance for many years is the lagoon of Alvarado and receives the discharges of two great rivers, Blanco, Limón and Papaloapan, which travel more than 200 km from its source to the sea, crossing large extensions of farmland where there are also livestock activities and the use of these pesticides. For this reason, the objective of this work was to determine the presence of organophosphate pesticides in the Alvarado lagoon at the Gulf of Mexico as a potential aspect of high impact contamination. Five pesticides have been identified in the lagoon sediments, of which the most important and highest concentrations are Dimethoate and Chlorpyrifos, with 75.65 - 79.0 ng/g and 0.17 - 0.23 ng/g respectively, both internationally classified as moderately toxic. These concentrations were comparable to levels in other world regions with intense agricultural activity and vector control like the Mediterranean Sea and the lagoon of Alvarado was evidenced as a hot spot for the accumulation of these organophosphates with the high risk for the benthic organisms and for the human health when consuming these fishery products.

关键词： Organophosphate Pesticides Sediments Coastal Lagoon

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濒危帽贝铁锈笠螺的活动节律和采食行为的初步观察(英文)

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动物学报 2007年第1期53卷 179-183页

作者： Free ESPINOSA Alexandre R.GONZLEZ Manuel J.MAESTRE Darren FA José M.GUERRA-GARCíA José C.GARCíA-GóMEZ Gibraltar Museum 18-20 Bomb House LaneGibraltarUK laboratorio de biología marina Departamento de Fisiología y ZoologíaAvda.Reina Mercedes6.41012 SevillaSpain

铁锈笠螺是地中海最濒危的海洋无脊椎动物,对其生物学知之甚少,缺少对其活动节律和采食行为的了解。使用环氧树脂Eporai1127(原位标记了20个不同外壳长度的个体,并在每个外壳上标有不同的数字,作者在白昼或黑夜的高潮和低潮期收集了有... 详细信息

铁锈笠螺是地中海最濒危的海洋无脊椎动物,对其生物学知之甚少,缺少对其活动节律和采食行为的了解。使用环氧树脂Eporai1127(原位标记了20个不同外壳长度的个体,并在每个外壳上标有不同的数字,作者在白昼或黑夜的高潮和低潮期收集了有关数据。可能由于云斑厚纹蟹(Pachygrapsus marmoratus)的捕食影响,铁锈笠螺白天的活动和运动多于夜间,但铁锈笠螺采食行为似乎仅限于高潮期。此外,汹涌的海面条件诱导了铁锈笠螺的活动和运动。

关键词：濒危帽贝铁锈笠螺活动环境因子

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Role of platelets and breast cancer stem cells in metastasis

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World Journal of Stem Cells 2020年第11期12卷 1237-1254页

作者： Gretel Mendoza-Almanza Luis Burciaga-Hernandez Vilma Maldonado Jorge Melendez-Zajgla Jorge Olmos CONACYT Universidad Autónoma de Zacatecas.Zacatecas 98060Mexico Maestría en Ciencias Biomédicas Universidad Autónoma de ZacatecasZacatecas 98160Mexico laboratorio de Epigenética Instituto Nacional de Medicina GenómicaCiudad de México 14610Mexico Génómica funcional del cáncer Instituto Nacional de Medicina GenómicaCiudad de México 14610Mexico Biotecnología marina Centro de Investigación Científica y de Estudios Superiores de EnsenadaEnsenada 22860Mexico

The high mortality rate of breast cancer is mainly caused by the metastatic ability of cancer cells,resistance to chemotherapy and radiotherapy,and tumor regression *** recent years,it has been shown that the presence of breast cancer stem cells is closely associated with the migration and metastatic ability of cancer cells,as well as with their resistance to chemotherapy and *** tumor microenvironment is one of the main molecular factors involved in cancer and metastatic processes development,in this sense it is interesting to study the role of platelets,one of the main communicator cells in the human body which are activated by the signals they receive from the microenvironment and can generate more than one *** can ingest and release RNA,proteins,cytokines and growth *** the platelets interact with the tumor microenvironment,they are called"tumor-educated platelets."Tumor-educated platelets transport material from the tumor microenvironment to sites adjacent to the tumor,thus helping to create microenvironments conducive for the development of primary and metastatic *** has been observed that the clone capable of carrying out the metastatic process is a cancer cell with stem cell *** stem cells go through a series of processes,including epithelial-mesenchymal transition,intravasation into blood vessels,movement through blood vessels,extravasation at the site of the establishment of a metastatic focus,and site ***-educated platelets support all these processes.

关键词： Breast cancer stem cells Platelets Metastasis Tumor microenvironment Epithelial-mesenchymal transition

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Estimating the geographic range of a threatened shark in a data-poor region： Cetorhinus maximus in the South Atlantic Ocean

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Current Zoology 2015年第5期61卷 811-826页

作者： Luis O. LUCIFORA Santiago A. BARBINI Edgardo E. DI GIACOMO Juan A. WAESSLE Daniel E. FIGUEROA Instituto de biologia Subtropical - Iguazu Consejo Nacional de Investigaciones Cientificas y Tecnicas Universidad Nacional de Misiones Puerto Iguazu Misiones Argentina laboratorio de Ictiologia Instituto de Investigaciones Marinas y Costeras Consejo Nacional de Investigaciones Cientificas y Tecnicas Universidad Nacional de Mar del Plata Mar del Plata Provincia de Buenos Aires Argentina Grupo Condros Instituto de Biologia Marina y Pesquera "Almirante Stomi" Universidad Nacional del Comahue San Antonio Oeste Rio Negro Argentina Instituto Nacional de Investigacion y desarrollo Pesquero Mar del Plata Provincia de Buenos Aires Argentina

The distribution of the planktivorous basking shark Cetorhinus maximus is influenced by zooplankton abundance at small scales and temperature at medium scales in the North Atlantic. Here, we estimate the distribution of basking sharks on South Atlantic continental shelves, and the relative importance of chlorophyll concentration, as a proxy for zooplankton abun- dance, and temperature in determining habitat suitability for basking sharks at large scales. We used maximum entropy （MaxEnt） and maximum likelihood （MaxLike） species distribution modelling to test three hypotheses： the distribution of basking sharks is determined by （1） temperature, （2） chlorophyll concentration, or （3） both chlorophyll and temperature, while considering other factors, such as oxygen and salinity. Off South America, basking shark habitat included subtropical, temperate and cool-temperate waters between approximately 20°S and 55°S. Off Africa, basking shark habitat was limited to cool-temperate waters off Namibia and southern South Africa. MaxLike models bad a better fit than MaxEnt models. The best model included minimum chlorophyll concentration, dissolved oxygen concentration, and sea surface temperature range, supporting hypothesis 3. However, of all variables included in the best model, minimum chlorophyll concentration had the highest influence on basking shark distribution. Unlike the North Atlantic distribution, the South Atlantic distribution of basking sharks includes subtropical and cool-temperate waters. This difference is explained by high minimum chlorophyll concentration off southern Brazil as compared to North Atlantic subtropical areas. Observations in other regions of the world support this conclusion. The highest habitat suitability for basking sharks is located close to nearshore areas that experience high anthropogenic impact [Current Zoology 61 （5）： 811-826, 2015].

关键词： Basking shark Chondrichthyes Geographic range MaxEnt MaxLike Southern Hemisphere

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New Records of Marine Diatoms for the American Continent Found on Stone Scorpionfish Scorpaena mystes

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Open Journal of Marine Science 2019年第2期9卷 98-112页

作者： Francisco O. López-Fuerte David A. Siqueiros-Beltrones Ulianov Jakes-Cota Arturo Tripp-Valdéz departamento Académico de Ciencias marinas y Costeras Laboratorio de Sistemas Arrecifales Universidad Autónoma de Baja California Sur La Paz México departamento de Plancton y Ecología marina Centro Interdisciplinario de Ciencias Marinas Instituto Politécnico Nacional La Paz México departamento de Pesquerías y biología marina Centro Interdisciplinario de Ciencias Marinas Instituto Politécnico Nacional La Paz México

The survey of new benthic substrata is expected to yield new records of diatom taxa. A particular type of substratum is the skin of the Stone scorpionfish Scorpaena mystes Jordan & Starks, 1895 that, because of its benthic form of life, represents a potential colonizing surface for various organisms, including epizoic and opportunistic diatom taxa (epibiotic community). Thus, a floristic survey of diatoms was carried out by sampling the epibiotic community from S. mystes specimens collected in the east coast of Baja California Sur (Gulf of California). Thirty diatoms are new records for Mexican littorals. Twelve of these taxa had not been hitherto recorded for American coasts. Micrographs, and morphometric and distribution data on these taxa are provided.

关键词： Epibiotic Floristics Mexican Littorals Species Richness Stone Scorpionfish

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Thermal preference, tolerance and temperature-dependent respiration in the California sea hare <i>Aplysia californica</i>

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Agricultural Sciences 2013年第6期4卷 46-52页

作者： Ana denisse Re Fernando Díaz Alfredo Salas-Garza Marco Gonzalez Victor Cordero Clara E. Galindo-Sanchez Edna Sanchez-Castrejon Adolfo Sánchez Zamora Alexei Licea-Navarro Instituto de Investigaciones Oceanológicas Universidad Autónoma de Baja California Ensenada Baja California México laboratorio de biología Celular y Molecular Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México laboratorio de Ecofisiología de Organismos Acuáticos Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México laboratorio de Ecofisiología de Organismos Acuáticos Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México laboratorio de Genómica Funcional Departamento de Biotecnología Marina Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) Ensenada Baja California México Unidad Multidisciplinaria de Docencia e Investigación Facultad de Ciencias Universidad Autónoma de México Sisal México

The thermoregulatory behavior of sea hare Aplysia californica was determined in a horizontal thermal gradient;with a preferred temperature (PT) of 18.3°C for the day cycle and 20.8°C for the night cycle. The displacement velocity demonstrated an initial rate of 30 cm·hˉ1 and gradually the velocity diminished to 18 cm·hˉ1 with several fluctuations mainly at 02:00 am. Critical Temperature Maxima (CTMax refers to the temperature point where at least 50% of the experimental group have a loss of attachment) was measured at three acclimation temperatures (16°C, 19°C and 22°C). At the lowest acclimation temperature (16°C), 50% of the experimental group had an attachment loss at CTMax 32.7°C, and in a higher acclimation temperature (22°C) CTMax was 36.2°C. The Oxygen Consumption Rate (OCR) was closely correlated to acclimation temperature, and at 16°C and 19°C sea hare had a relatively stable metabolic rate, with OCR increasing to 9 mg O2 hˉ1·kgˉ1 w.w. in a higher acclimation temperature.

关键词： Thermoregulatory Behavior CTMax Oxygen Consumption Aplysia californica

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Adipose-derived mesenchymal stem/stromal cells:from the lab bench to the basic concepts for clinical translation

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BIOCELL 2018年第3期42卷 67-77页

作者： Yesica Romina FRONTINI-LóPEZ Aldana Daniela GOJANOVICH Diego MASONE Diego Martín BUSTOS marina UHART laboratorio de Integración de Señles Celulares.IHEM-CONICET Universidad Nacional de Cuyo MendozaArgentina Facultad de Ingeniería Universidad Nacional de CuyoMendozaArgentina Facultad de Ciencias Exactas y Naturales Universidad Nacional de CuyoMendozaArgentina

In the last years,much work has shown that the most effective repair system of the body is represented by stem cells,which are defined as undifferentiated precursors that own unlimited or prolonged self-renewal ability,which also have the potential to transform themselves into various cell types through *** tissues that form the body contain many different types of somatic cells,along with stem cells that are called‘mesenchymal stem(or stromal)cells’(MSC).In certain circumstances,some of these MSC migrate to injured tissues to replace dead cells or to undergo differentiation to repair *** discovery of MSC has been an important step in regenerative medicine because of their high ***,the finding of a method to isolate MSC from adipose tissue,so called‘adipose-derived mesenchymal stem cells’(ASC),which share similar differentiation capabilities and isolation yield that is greater than other MSC,and less bioethical concerns compared to embryonic stem cells,have created self-praised publicity to procure almost any treatment with ***,we review the current techniques for isolation,culture and differentiation of human ASC(hASC),and describe them in *** also compile some advantages of the hASC over other stem cells,and provide some concepts that could help finding strategies to promote their therapeutic efficiency.

关键词： hASC Tissue regeneration Cell therapy

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Species richness and community structure of class Polyplacophora at the intertidal rocky shore on the marine priority region no.33,Mexico

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Open Journal of Ecology 2014年第2期4卷 43-52页

作者： Lizeth Galeana-Rebolledo Rafael Flores-Garza Adriana Reyes-Gomez Sergio Garcia-Ibanez Pedro Flores-Rodriguez Carmina Torreblanca-Ramirez Arcadio Valdes-Gonzalez Unidad Academica de Ecologia marina Universidad Autonoma de GuerreroAcapulcoMexico Universidad Autonoma de Nuevo Leon Laboratorio de AcuaculturaFacultad de Ciencias BiologicasCiudad UniversitariaSan Nicolas de los GarzaMexico

Marine Priority Region No. 33 (MPR 33) lies in the State of Guerrero, where the National Commission for Knowledge and Use of Biodiversity has declared a lack of information on marine species, Class POLYPLACOPHORA among others. This program was carried out on the rocky intertidal zone of MPR 33 with the objectives to: 1) determine species richness, 2) community composition based on families represented, 3) estimate the density, 4) index of diversity, 5) analyze body proportions and 6) geographic distribution of species. Three surveys on five sites were conducted during 2009 and 2012, using one mt2 quadrant for systematic sampling procedure;collecting all POLYPLACOPHORA specimens found within the quadrants, then proceeding with their preservation. 441 organisms were analyzed where 17 species were identified, on nine genera within six families. Fifteen new species were recorded for the MPR 33. Family ISCHNOCHITONIDAE Dall, 1889 was the best represented in species richness and CHITONIDAE Rafinesque, 1815 in abundance. density of 8.82 organisms/m2, the H′ index was 2.38 bits/individuals and J′ = 0.57. The species Chiton (Chiton) articulatus Sowerby, 1832 showed the highest density, greater size and was found in all five collection sites. Three species, (Chiton (C.) articulatus, Ischnochiton (Ischnochiton) muscarius (Reeve, 1847) and Chiton (Chiton) alboli-neatus Broderip & Sowerby, 1829), were considered wide. Intertidal species richness was associated with habitat stability and wave intensity;the more unstable sites had greater richness while most stable sites lower. Species inventory and understanding the communities’ interactions of the marine fauna of the State of Guerrero are important;therefore these efforts must be continued.

关键词： Polyplacophora New Records Methodology RMP 33 Guerrero

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