ORCID Profile
0000-0002-6621-3821
Current Organisations
University of Oklahoma Health Sciences Center
,
Griffith University
,
Noakhali Science and Technology University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Oxford University Press (OUP)
Date: 03-08-2017
Publisher: Universidad Nacional de Colombia
Date: 04-08-2021
DOI: 10.15446/CALDASIA.V43N2.85443
Abstract: A pesar de los avances en registros primarios de especies, sesgos de calidad y accesibilidad en información dificultan el estudio de patrones espaciales de bio ersidad. Se presenta el primer análisis sistemático sobre los sesgos en la distribución temporal y espacial de registros de mamíferos silvestres terrestres continentales de Colombia. Mediante el uso de bases de datos, identificamos áreas administrativas y ecorregiones con los mayores vacíos de información a nivel de orden para el número de especies registradas respecto al número de especies esperadas. Además, realizamos análisis de complementariedad para establecer áreas prioritarias de muestreo que ayuden a disminuir sesgos en patrones de registro de especies de mamíferos en Colombia. La mayoría de los órdenes (70 %) presentan una representatividad menor al 50 % en al menos 40 % de los departamentos y 60 % de las ecorregiones estudiadas. Además, encontramos que la cobertura temporal en celdas de 50 * 50 km es baja, con promedio inferior a los cuatro años desde 1950 hasta 2019. El análisis de complementariedad muestra que el registro de especies a nivel nacional se maximizaría en los bosques tropicales de la Amazonía en los límites entre el departamento del Caquetá y Amazonas, el escudo Guayanés en la región de la Orinoquia, además de los ecosistemas de sabanas del Vichada, Casanare y Arauca. Proponemos la definición de esquemas depriorización y muestreo sistemático tanto para áreas aisladas y poco conocidas, como para zonas de mayor presión antrópica que pueden sufrir pérdidas locales de especies a corto plazo.
Publisher: Sociedad Colombiana de Mastozoologia
Date: 24-12-2020
Abstract: En este número de Mammalogy Notes presentamos tres notas sobre extensiones de distribución, siete notas de historia natural y tres inventarios de mamíferos. Las contribuciones provienen de Colombia, Perú, México, Brasil y Venezuela. Adicionalmente, incluimos tres nuevos trabajos de la serie especial sobre colecciones de mamíferos de Colombia. De esta forma Mammalogy notes continúa creciendo, mejorando y aportando al conocimiento de los mamíferos neotropicales
Publisher: Cold Spring Harbor Laboratory
Date: 08-02-2021
DOI: 10.1101/2021.02.07.428694
Abstract: Humanity is on a pathway of unsustainable loss of the natural systems upon which we, and all life, rely. To date, global efforts to achieve internationally-agreed goals to reduce carbon emissions, halt bio ersity loss, and retain essential ecosystem services, have been poorly integrated. However, these different goals all rely on preserving natural ecosystems. Here, we show how to unify these goals by empirically deriving spatially-explicit, quantitative area-based targets for the retention of natural terrestrial ecosystems. We found that at least 67 million km 2 of Earth’s natural terrestrial ecosystems (~79% of the area remaining) require retention – via a combination of strict protection but more prominently through sustainably managed land use regimes complemented by restoration actions – to contribute to bio ersity, climate, soil and freshwater objectives under four United Nations’ Resolutions. This equates to retaining natural ecosystems across ~50% of the total terrestrial (excluding Antarctica) surface of Earth. Our results show where retention efforts could be focussed to contribute to multiple goals simultaneously. The retention targets concept that we present explicitly recognises that such management can and should co-occur alongside and be driven by the people who live in and rely on places where natural and semi-natural ecosystems remain on Earth.
Publisher: Springer Science and Business Media LLC
Date: 08-01-2021
Publisher: Springer Science and Business Media LLC
Date: 02-11-2022
Publisher: Sociedad Colombiana de Mastozoologia
Date: 19-04-2022
Abstract: La actualización de la lista de especies presentes en un país es una tarea continua que llena vacíos de información y apoya la toma de decisiones. En los últimos cinco años, ha habido un aumento del número de especies de mamíferos descritas como nuevas en Colombia, así como primeros registros y cambios taxonómicos. Con el fin de actualizar la información de las especies de mamíferos de Colombia, realizamos una revisión exhaustiva de los cambios taxonómicos de las 528 especies registradas en listas previas. Agregamos nuevas especies descritas, así como nuevos registros de especies ya descritas. Discutimos especies cuya presencia ha sido sugerida recientemente en Colombia, pero que no es respaldada por especímenes de museo. La lista actual de mamíferos en Colombia tiene 543 especies, con cuatro descritas en el último año. Esperamos que la lista sea una herramienta apoyar las necesidades de investigación, en especial las extensiones de distribución, los problemas taxonómicos y la conservación de los mamíferos del país. Finalmente, recomendamos que las actualizaciones de la lista sigan estándares nacionales e internacionales como Darwin Core, utilizado por el Repositorio de Información Global sobre Bio ersidad - GBIF, y el Sistema de Información sobre Bio ersidad de Colombia – SiB.
Publisher: Wiley
Date: 26-01-0005
DOI: 10.1002/PAN3.10218
Abstract: Spending time in nature is one potential way to cope with the negative physical and psychological health impacts from major stressful life events. In 2020, a large fraction of the global population was impacted by restrictions to contain the spread of the COVID‐19 outbreak, a period characterised by marked health risks and behavioural changes. Here we explore whether people responded to this stressor by spending more time in nature and investigate the reasons for any changes. We surveyed 1,002 people in Brisbane, Australia in 2020, to measure the change in use of green space during the restrictions period and benefits people associated with visiting them. About 36% of participants increased their urban green space use, but 26% reduced it, indicating a great deal of flux. Furthermore, 45% of the previous non‐users of urban green space began using it for the first time during the restrictions period. Older people were less likely to increase their green space use and those with a backyard were more likely to increase their use of green spaces. Participants' change in use occurred regardless of the amount of green space available in close proximity to their households. In addition, we did not find a relationship between nature‐relatedness and change in use. People's reasons for green space use shifted during the pandemic‐related restrictions period, with many emphasising improvement of personal well‐being rather than consolidating community capital. Most participants indicated an increase in the importance of the psychological and physical benefits obtained from urban green spaces. We conclude that increased urban green space use during moments of stress such as the COVID‐19 pandemic has the potential to ameliorate some of the negative effects of the stressor, but that the capacity and desire to spend more time in green space varies markedly across society. Sufficient urban green space provision for all sections of society will maximise the opportunity to employ a nature‐based coping mechanism during times of personal or community stress.
Publisher: Walter de Gruyter GmbH
Date: 2016
DOI: 10.1515/MAMMALIA-2014-0158
Abstract: In spite of previous reviews, there is still no consensus on the information associated to the richness of the genus
Publisher: Wiley
Date: 09-10-2022
DOI: 10.1111/DDI.13640
Abstract: Fires can severely impact aquatic fauna, especially when attributes of soil, topography, fire severity and post‐fire rainfall interact to cause substantial sedimentation. Such events can cause immediate mortality and longer‐term changes in food resources and habitat structure. Approaches for estimating fire impacts on terrestrial species (e.g. intersecting fire extent with species distributions) are inappropriate for aquatic species as sedimentation can carry well downstream of the fire extent, and occur long after fire. Here, we develop an approach for estimating the spatial extent of fire impacts for aquatic systems, across multiple catchments. Southern Australian bioregions affected by the fires in 2019–2020 that burned million ha of temperate and subtropical forests. We integrated an existing soil erosion model with fire severity mapping and rainfall data to estimate the spatial extent of post‐fire sedimentation threat in waterways and in basins and the potential exposure of aquatic species to this threat. We validated the model against field observations of sedimentation events after the 2019–20 fires. While fires overlapped with ~27,643 km of waterways, post‐fire sedimentation events potentially occurred across ~40,449 km. In total, 55% ( n = 85) of 154 basins in the study region may have experienced substantial post‐fire sedimentation. Ten species—including six Critically Endangered—were threatened by post‐fire sedimentation events across 100% of their range. The model increased the estimates for potential impact, compared to considering fire extent alone, for % of aquatic species. Some species had distributions that did not overlap with the fire extent, but that were entirely exposed to post‐fire sedimentation threat. Compared with estimating the overlap of fire extent with species' ranges, our model improves estimates of fire‐related threats to aquatic fauna by capturing the complexities of fire impacts on hydrological systems. The model provides a method for quickly estimating post‐fire sedimentation threat after future fires in any fire‐prone region, thus potentially improving conservation assessments and informing emergency management interventions.
Publisher: Sociedad Argentina para el Estudio de los Mamiferos
Date: 07-2018
Publisher: Universidade de Sao Paulo, Agencia USP de Gestao da Informacao Academica (AGUIA)
Date: 2014
Publisher: IOP Publishing
Date: 11-2022
Abstract: Understanding and mapping anthropogenic threats on species distributions is a crucial task in conservation science to identify priority areas and propose appropriate conservation strategies. Yet, there is a big challenge to quantify how these threats are associated with species distribution patterns at multiple temporal scales. For birds, existing national and global analyses have mostly focused on forest specialists and they tend to consider only one time period. Here, we evaluated spatial and temporal changes in human footprint within the distributions of Colombian birds from 1970 to 2018, and projected them into 2030. We show that widespread increases in human footprint were common within the distribution of terrestrial birds. Endemic and threatened birds have been disproportionately affected by past increases in human footprint within their distribution, and this trend will continue into the future. Several areas harboring high ersity of forest-specialists remained relatively intact up to 2018. However, our predictions show significantly higher and faster ( % annual change) levels of transformation within these areas by 2030. Importantly, our results suggest that non-forest birds could be experiencing habitat quality declines that are just as significant as those shown for forest birds. Our results show that mitigating negative anthropogenic effects on bird habitats in Colombia requires an array of conservation strategies that range from strict habitat protection to mixed management. These analyses can serve as inputs in conservation decision tools that consider spatiotemporal variation of anthropic threats under multiple scenarios of change.
Publisher: Springer Science and Business Media LLC
Date: 03-09-2020
DOI: 10.1038/S41598-020-71457-1
Abstract: Ras association domain-containing protein 5 (RASSF5), one of the prospective biomarkers for tumors, generally plays a crucial role as a tumor suppressor. As deleterious effects can result from functional differences through SNPs, we sought to analyze the most deleterious SNPs of RASSF5 as well as predict the structural changes associated with the mutants that h er the normal protein–protein interactions. We adopted both sequence and structure based approaches to analyze the SNPs of RASSF5 protein. We also analyzed the putative post translational modification sites as well as the altered protein–protein interactions that encompass various cascades of signals. Out of all the SNPs obtained from the NCBI database, only 25 were considered as highly deleterious by six in silico SNP prediction tools. Among them, upon analyzing the effect of these nsSNPs on the stability of the protein, we found 17 SNPs that decrease the stability. Significant deviation in the energy minimization score was observed in P350R, F321L, and R277W. Besides this, docking analysis confirmed that P350R, A319V, F321L, and R277W reduce the binding affinity of the protein with H-Ras, where P350R shows the most remarkable deviation. Protein–protein interaction analysis revealed that RASSF5 acts as a hub connecting two clusters consisting of 18 proteins and alteration in the RASSF5 may lead to disassociation of several signal cascades. Thus, based on these analyses, our study suggests that the reported functional SNPs may serve as potential targets for different proteomic studies, diagnosis and therapeutic interventions.
Publisher: Sociedad Argentina para el Estudio de los Mamiferos
Date: 12-2022
Publisher: Cold Spring Harbor Laboratory
Date: 04-04-2021
DOI: 10.1101/2021.04.03.438313
Abstract: As human activities on the world’s oceans intensify, mapping human pressures is essential to develop appropriate conservation strategies and prioritize investments with limited resources. Here, we map non-climatic pressures on coral reefs using the latest quantitative data layers on fishing, nitrogen and sediment pollution, coastal and industrial development, and tourism. Across 54,596 coral reef pixels worldwide, we identify the top-ranked local pressure and estimate a cumulative pressure index mapped at 0.05-degree (∼5 km) resolution. Fishing was the most common top-ranked pressure followed by water pollution (nutrients and sediments), although there is substantial variation by regions. We also find that local pressures are similar inside and outside a proposed global portfolio of coral reef climate refugia. We provide the best available information to inform critical conservation strategies and ensure local pressures are effectively managed to increase the likelihood of the persistence of coral reefs to climate change.
Publisher: Springer Science and Business Media LLC
Date: 10-09-2020
Publisher: Wiley
Date: 05-03-2022
DOI: 10.1111/COBI.14040
Abstract: Global efforts to deliver internationally agreed goals to reduce carbon emissions, halt bio ersity loss, and retain essential ecosystem services have been poorly integrated. These goals rely in part on preserving natural (e.g., native, largely unmodified) and seminatural (e.g., low intensity or sustainable human use) forests, woodlands, and grasslands. To show how to unify these goals, we empirically derived spatially explicit, quantitative, area‐based targets for the retention of natural and seminatural (e.g., native) terrestrial vegetation worldwide. We used a 250‐m‐resolution map of natural and seminatural vegetation cover and, from this, selected areas identified under different international agreements as being important for achieving global bio ersity, carbon, soil, and water targets. At least 67 million km 2 of Earth's terrestrial vegetation (∼79% of the area of vegetation remaining) required retention to contribute to bio ersity, climate, soil, and freshwater conservation objectives under 4 United Nations’ resolutions. This equates to retaining natural and seminatural vegetation across at least 50% of the total terrestrial (excluding Antarctica) surface of Earth. Retention efforts could contribute to multiple goals simultaneously, especially where natural and seminatural vegetation can be managed to achieve cobenefits for bio ersity, carbon storage, and ecosystem service provision. Such management can and should co‐occur and be driven by people who live in and rely on places where natural and sustainably managed vegetation remains in situ and must be complemented by restoration and appropriate management of more human‐modified environments if global goals are to be realized.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 08-11-2019
Publisher: Elsevier BV
Date: 04-2015
DOI: 10.1016/J.TREE.2015.01.011
Abstract: Landscape structure and fragmentation have important effects on ecosystem services, with a common assumption being that fragmentation reduces service provision. This is based on fragmentation's expected effects on ecosystem service supply, but ignores how fragmentation influences the flow of services to people. Here we develop a new conceptual framework that explicitly considers the links between landscape fragmentation, the supply of services, and the flow of services to people. We argue that fragmentation's effects on ecosystem service flow can be positive or negative, and use our framework to construct testable hypotheses about the effects of fragmentation on final ecosystem service provision. Empirical efforts to apply and test this framework are critical to improving landscape management for multiple ecosystem services.
Publisher: Sociedad Colombiana de Mastozoologia
Date: 15-01-2016
Abstract: Debido al avance en el desarrollo de investigaciones de ersa índole que involucran mamíferos, cada año se reportan cambios en la riqueza de especies registradas en el territorio nacional. Un esfuerzo notable encaminado a actualizar el conocimiento de este grupo en el país señaló la presencia de 492 especies para el año 2013 (Solari et al. 2013). Este número se incrementó a 500 especies para el año 2014, a partir de revisiones sistemáticas o adiciones de nuevas localidades de distribución para varias especies neotropicales (Ramírez-Chaves & Suárez-Castro 2014) y en esta revisión se aumenta el número de especies a 518 para el país. El incremento ha sido mayor para murciélagos (orden Chiroptera), grupo que actualmente cuenta con el número más alto de especies de mamíferos registradas en Colombia (205 especies). Sin embargo, el uso de nuevas técnicas y exploraciones de c o realizadas por diferentes investigadores han generado una gran cantidad de conocimiento para otros grupos, por lo que es necesario sintetizar la información de manera constante para que estédisponible a todos aquellos involucrados en estudiar y conservar la bio ersidad del país. Con el fin de actualizar el número de especies de mamíferos registradas en el territorio nacional, presentamos una valoración y actualización con los cambios recientes para Colombia durante los últimos meses.
Publisher: Wiley
Date: 04-10-2022
DOI: 10.1002/EAP.2713
Abstract: As fragmented landscapes become increasingly common around the world, managing the spatial arrangement of landscape elements (i.e., landscape configuration) may help to promote the conservation of bio ersity. However, the relative effects of landscape configuration on different dimensions of bio ersity across species assemblages are largely unknown. Thus, a key challenge consists in understanding when it is necessary to focus on landscape configuration, in addition to landscape composition, to achieve multifunctional landscapes. We tested the effects of landscape composition (the percentage of tree cover and built infrastructure) and landscape configuration (degree of fragmentation) on landscape‐level species richness and different metrics of functional ersity of urban birds. We collected data on different bird guilds (nectarivores/frugivores, insectivores) from Brisbane, Australia. Using structural equation models, we found that landscape structure (landscape composition and configuration) affected functional ersity via two main pathways: (1) through effects of landscape composition, mediated by landscape configuration (indirect effects), and (2) through direct (“independent”) effects of landscape composition and configuration, filtering species with extreme trait values. Our results show that landscape‐level species richness declined with the extent of built infrastructure, but patterns of trait ersity did not necessarily correlate with this variable. Landscape configuration had a stronger mediating effect on some metrics of the functional ersity of insectivores than on the functional ersity of frugivores/nectarivores. In addition, fragmentation increased the effects of built infrastructure for some traits (body size and dispersal capacity), but not for others (habitat plasticity and foraging behavior). These results suggest that differential approaches to managing landscape structure are needed depending on whether the focus is on protecting functional ersity or species richness and what the target guild is. Managing landscape fragmentation in areas with high levels of built infrastructure is important if the objective is to protect insectivore species with uncommon traits, even if it is not possible to preserve high levels of species richness. However, if the target is to enhance both functional ersity and species richness of multiple guilds, the focus should be on improving composition through the reduction of negative effects of built infrastructure, rather than promoting specific landscape configurations in growing cities.
Publisher: Wiley
Date: 28-12-2021
DOI: 10.1111/CONL.12858
Abstract: As human activities on the world's oceans intensify, mapping human pressure is essential to develop appropriate conservation strategies and prioritize investments with limited resources. Here, we map six human (nonclimatic) pressures on coral reefs using the latest quantitative data on fishing, water pollution (nitrogen and sediments), coastal population, industrial development, and tourism. Using a percentile approach to rank different stressors, we identify the top‐ranked local pressure and estimate a cumulative pressure index for 54,596 global coral reef pixels at 0.05° (∼5 km) resolution. We find that coral reefs are exposed to multiple intense local pressures: fishing and water pollution (nutrients and sediments) are the most common top‐ranked pressures worldwide (in 30.8% and 32.3% of reef cells, respectively), although each pressure was ranked as a top pressure in some locations. We also find that local pressures are similar inside and outside a proposed global portfolio of coral reef climate refugia, suggesting that even potential climate refugia have high levels of local human pressure that require effective management. Our findings and datasets provide the best available information that can ensure local pressures are effectively managed across the world's coral reefs.
Publisher: Wiley
Date: 27-01-2023
DOI: 10.1111/COBI.14032
Abstract: Monitoring is critical to assess management effectiveness, but broadscale systematic assessments of monitoring to evaluate and improve recovery efforts are lacking. We compiled 1808 time series from 71 threatened and near‐threatened terrestrial and volant mammal species and subspecies in Australia (48% of all threatened mammal taxa) to compare relative trends of populations subject to different management strategies. We adapted the Living Planet Index to develop the Threatened Species Index for Australian Mammals and track aggregate trends for all s led threatened mammal populations and for small ( g), medium (35–5500 g), and large mammals ( g) from 2000 to 2017. Unmanaged populations (42 taxa) declined by 63% on average unmanaged small mammals exhibited the greatest declines (96%). Populations of 17 taxa in havens (islands and fenced areas that excluded or eliminated introduced red foxes [ Vulpes vulpes ] and domestic cats [ Felis catus ]) increased by 680%. Outside havens, populations undergoing sustained predator baiting initially declined by 75% but subsequently increased to 47% of their abundance in 2000. At sites where predators were not excluded or baited but other actions (e.g., fire management, introduced herbivore control) occurred, populations of small and medium mammals declined faster, but large mammals declined more slowly, than unmanaged populations. Only 13% of taxa had data for both unmanaged and managed populations index comparisons for this subset showed that taxa with populations increasing inside havens declined outside havens but taxa with populations subject to predator baiting outside havens declined more slowly than populations with no management and then increased, whereas unmanaged populations continued to decline. More comprehensive and improved monitoring (particularly encompassing poorly represented management actions and taxonomic groups like bats and small mammals) is required to understand whether and where management has worked. Improved implementation of management for threats other than predation is critical to recover Australia's threatened mammals.
Publisher: Pensoft Publishers
Date: 07-2014
DOI: 10.15560/10.3.639
Publisher: Elsevier BV
Date: 06-2022
Publisher: Frontiers Media SA
Date: 13-09-2022
Abstract: Raptors are emblematic of the global bio ersity crisis because one out of five species are threatened with extinction and over half have declining populations due to human threats. Yet our understanding of where these “threats” impact raptor species is limited across terrestrial Earth. This is concerning because raptors, as apex predators, are critically positioned in ecological food webs, and their declining populations can undermine important ecosystem services ranging from pest control to disease regulation. Here, we map the distribution of 15 threats within the known ranges of 172 threatened and near threatened raptor species globally as declared by the International Union for the Conservation of Nature. We analyze the proportion of each raptor range that is exposed to threats, identify global hotspots of impacted raptor richness, and investigate how human impacts on raptors vary based on several intrinsic (species traits) and extrinsic factors. We find that humans are potentially negatively affecting at least one threatened raptor species across three quarters of Earth’s terrestrial area (78% 113 million km 2 ). Our results also show that raptors have 66% of their range potentially impacted by threats on average (range 2.7–100%). Alarmingly, critically endangered species have 90% of their range impacted by threats on average. We also highlight 57 species (33%) of particular concern that have & 90% of their ranges potentially impacted. Without immediate conservation intervention, these 57 species, including the most heavily impacted Forest Owlet ( Athene blewitti ), the Madagascar Serpent-eagle ( Eutriorchis astur ), and the Rufous Fishing-owl ( Scotopelia ussheri ), will likely face extinction in the near future. Global “hotspots” of impacted raptor richness are ubiquitous, with core areas of threat in parts of the Sahel and East Africa where 92% of the assessed raptors are potentially impacted per grid cell (10 species on average), and in Northern India where nearly 100% of raptors are potentially impacted per grid cell (11 species). Additionally, “coolspots” of unimpacted richness that represent refuges from threats occur in Greenland and Canada, where 98 and 58% of raptors are potentially unimpacted per grid cell, respectively (nearly one species on average), Saharan Africa, where 21% of raptors are potentially unimpacted per grid cell (one species on average), and parts of the Amazon, where 12% of raptors are potentially unimpacted per grid cell (0.6 species on average). The results provide essential information to guide conservation planning and action for the world’s imperiled raptors.
Publisher: Wiley
Date: 10-05-2021
DOI: 10.1111/CSP2.443
Abstract: Protected areas are important for preventing bio ersity declines, yet indicators of species' trends in protected areas rarely include threatened species. We use data from the first national Threatened Species Index developed in Australia to report on trends for threatened and near‐threatened birds inside and outside terrestrial and marine protected areas. We adopted the Living Planet Index to calculate trends for 39 bird taxa at 16,742 monitoring sites (11,539 inside and 5,203 outside PAs) between 1985 and 2016. At a continental scale, the overall decline in the national index was smaller inside protected areas (66% decrease in average population abundance) than outside (77%), although after 2000 declines were greater within (36%) versus outside (26%) protected areas. Five out of seven jurisdictions showed similar switching in patterns over time. Protected areas initially had a greater net positive effect on trends of more imperiled birds than less imperiled birds, but between 2000 and 2016 declines of the most imperiled birds were greater inside protected areas than outside. Our analyses suggest that the effectiveness of Australia's protected area network at improving trends in threatened species has weakened, and support the hypothesis that trends for terrestrial birds outside PAs might be improving due to increased conservation efforts on private land. Although this study represents the most comprehensive collation of threatened species population time series and trends ever for Australia, the number of monitoring sites inside PAs was double that outside PAs, even though on average, more than 70% of threatened bird distributions occur outside PAs, with important gaps in monitoring across space, time and taxa that need to be filled to fully understand the effectiveness of public and private conservation actions at a national level. The results underline the importance of active management plus monitoring to track and report on long‐term trends across species.
Publisher: SAGE Publications
Date: 2021
DOI: 10.1177/11779322211054684
Abstract: A new strain of the beta coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is solely responsible for the ongoing coronavirus disease 2019 (COVID-19) pandemic. Although several studies suggest that the spike protein of this virus interacts with the cell surface receptor, angiotensin-converting enzyme 2 (ACE2), and is subsequently cleaved by TMPRSS2 and FURIN to enter into the host cell, conclusive insight about the interaction pattern of the variants of these proteins is still lacking. Thus, in this study, we analyzed the functional conjugation among the spike protein, ACE2, TMPRSS2, and FURIN in viral pathogenesis as well as the effects of the mutations of the proteins through the implementation of several bioinformatics approaches. Analysis of the intermolecular interactions revealed that T27A (ACE2), G476S (receptor-binding domain [RBD] of the spike protein), C297T (TMPRSS2), and P812S (cleavage site for TMPRSS2) coding variants may render resistance in viral infection, whereas Q493L (RBD), S477I (RBD), P681R (cleavage site for FURIN), and P683W (cleavage site for FURIN) may lead to increase viral infection. Genotype-specific expression analysis predicted several genetic variants of ACE2 (rs2158082, rs2106806, rs4830971, and rs4830972), TMPRSS2 (rs458213, rs468444, rs4290734, and rs6517666), and FURIN (rs78164913 and rs79742014) that significantly alter their normal expression which might affect the viral spread. Furthermore, we also found that ACE2, TMPRSS2, and FURIN proteins are functionally co-related with each other, and several genes are highly co-expressed with them, which might be involved in viral pathogenesis. This study will thus help in future genomics and proteomics studies of SARS-CoV-2 and will provide an opportunity to understand the underlying molecular mechanism during SARS-CoV-2 pathogenesis.
Publisher: Sociedad Colombiana de Mastozoologia
Date: 15-12-2014
DOI: 10.47603/MANOVOL1N2.31-34
Abstract: A continuación indicamos las adiciones y cambios presentados desde la publicación más reciente de la lista de chequeo de mamíferos de Colombia, en la que se incluyeron un total de 492 especies nativas (Solari et al. 2013). En total, se han registrado 13 nuevas especies: siete murciélagos (orden Chiroptera), tres carnívoros (Carnivora), un primate (Primates), un roedor (Rodentia) y un perisodáctilo (Perissodactyla) (Tabla 1). Tres especies de murciélagos y una especie de primate son reportadas con base en cambios nomenclaturales y taxonómicos: Uroderma convexum (Mantilla-Meluk 2014), Myotis caucensis (Moratelli et al. 2013), Myotis pilosatibialis (Mantilla-Meluk & Muñoz-Garay 2014) y Pithecia milleri (Marsh 2014).
Publisher: Wiley
Date: 15-03-2022
DOI: 10.1111/DDI.13497
Abstract: Introduced predators negatively impact bio ersity globally, with insular fauna often most severely affected. Here, we assess spatial variation in the number of terrestrial vertebrates (excluding hibians) killed by two mammalian mesopredators introduced to Australia, the red fox ( Vulpes vulpes ) and feral cat ( Felis catus ). We aim to identify prey groups that suffer especially high rates of predation, and regions where losses to foxes and/or cats are most substantial. Australia. We draw information on the spatial variation in tallies of reptiles, birds and mammals killed by cats in Australia from published studies. We derive tallies for fox predation by (i) modelling continental‐scale spatial variation in fox density, (ii) modelling spatial variation in the frequency of occurrence of prey groups in fox diet, (iii) analysing the number of prey in iduals within dietary s les and (iv) discounting animals taken as carrion. We derive point estimates of the numbers of in iduals killed annually by foxes and by cats and map spatial variation in these tallies. Foxes kill more reptiles, birds and mammals (peaking at 1071 km −2 year −1 ) than cats (55 km −2 year −1 ) across most of the unmodified temperate and forested areas of mainland Australia, reflecting the generally higher density of foxes than cats in these environments. However, across most of the continent – mainly the arid central and tropical northern regions (and on most Australian islands) – cats kill more animals than foxes. We estimate that foxes and cats together kill 697 million reptiles annually in Australia, 510 million birds and 1435 million mammals. This continental‐scale analysis demonstrates that predation by two introduced species takes a substantial and ongoing toll on Australian reptiles, birds and mammals. Continuing population declines and potential extinctions of some of these species threatens to further compound Australia's poor contemporary conservation record.
Publisher: Elsevier BV
Date: 06-2021
Publisher: Wiley
Date: 10-09-2021
DOI: 10.1111/CONL.12838
Abstract: Latin America and the Caribbean (LAC) is one of the world's most bio erse regions, but this ersity is threatened by the overexploitation of natural resources and internal social conflicts. In 2018, 33 LAC countries were invited to sign and ratify the landmark Escazú Agreement, which is the first legally binding environmental agreement to explicitly integrate human rights with environmental matters. The agreement outlines an approach to enhance the protection of environmental defenders, increase public participation in environmental decision‐making, and foster cooperation among countries for bio ersity conservation. However, clear mechanisms to implement the ideals of the Agreement are currently lacking. We identify the key provisions of the Agreement and link these to tangible mechanisms which aim to integrate human rights and nature conservation. These mechanisms include technological (e.g., free online data), human‐based (e.g., legal advice from multidisciplinary teams), and nature‐based solutions (e.g., transboundary species management). As environmental assets––and threats to them––span national boundaries, the collaborative and participatory provisions of the agreement could catalyze coordinated transboundary environmental management. Because of the importance of this Agreement for the LAC region, we added a Spanish version of this manuscript in the Supplementary Material (versión del artículo en español en el material suplementario).
Publisher: University of Queensland Library
Date: 2018
Publisher: ACCEFYN - Academia Colombiana de Ciencias Exactas, Fisicas y Naturales
Date: 03-10-2016
Abstract: A pesar de la gran ersidad de ecosistemas que habitan y de su importancia económica‚ ecológica y cultural‚ la información sobre las especies del orden Carnivora es escasa en Colombia. Con el fin de ejemplificar los sesgos y los avances en el conocimiento que se tiene sobre tres de las familias de Carnivora (Canidae, Mephitidae y Procyonidae) en el país, se evaluó el estado de la investigación sobre ellas con base en el número de publicaciones dedicadas a cada especie. Además, se estableció una escala de prioridades según el estado de amenaza y el esfuerzo de investigación de cada familia. Se encontraron 78 estudios sobre las tres familias y se constató que existen grandes vacíos relacionados con la ecología y la historia natural de la mayoría de las especies evaluadas, aun cuando el 80 % de ellas se registraron por primera vez a nivel nacional hace más de 60 años. La mayoría de los estudios relacionados con la distribución y los registros correspondió a la familia Procyonidae, en tanto que la mayor parte de los estudios ecológicos se registró en torno a la familia Canidae, específicamente sobre la especie Cerdocyon thous. Aunque la prioridad más alta correspondió a Bassaricyon neblina, la mayoría de los estudios sobre las demás especies correspondió a evaluaciones locales en escalas temporales y espaciales pequeñas. El presente estudio muestra que la asignación de algunas especies a las diferentes categorías de amenaza se ha basado en supuestos erróneos que no han sido verificados en c o. Además, la presunta ausencia de ciertas especies en algunas provincias biogeográficas es señal de la existencia de grandes vacíos de información. Esta revisión sirve como marco de referencia para priorizar las investigaciones sobre los patrones de distribución y el estado de amenaza de las especies de estas familias en el país. © 2016. Acad. Colomb. Cienc. Ex. Fis. Nat.
Publisher: Wiley
Date: 04-08-2021
DOI: 10.1111/GCB.15811
Abstract: Sediment runoff from disturbed coastal catchments is a major threat to marine ecosystems. Understanding where sediments are produced and where they are delivered enables managers to design more effective strategies for improving water quality. A management strategy is targeted restoration of degraded terrestrial areas, as it provides opportunities to reduce land‐based runoff from coastal areas and consequently foster coral reef conservation. To do this strategically, a systematic approach is needed to identify watersheds where restoration actions will provide the highest conservation benefits for coral reefs. Here, we develop a systematic approach for identifying global forest restoration opportunities that would also result in large decreases in the flux of sediments to coral reefs. We estimate how land‐use change affects sediment runoff globally using high‐resolution spatial data and determine the subsequent risk of sediment exposure on coral reefs using a diffusion‐based ocean transport model. Our results reveal that sediment export is a major issue affecting 41% of coral reefs globally. The main coastal watersheds with the highest sediment export are predominantly located in Southeast Asian countries, with Indonesia and the Philippines accounting for 52% of the sediment export in coastal areas near coral reefs. We show how restoring forest across multiple watersheds could help to reduce sediment export to 63,000 km 2 of coral reefs. Although reforestation opportunities in areas that discharge onto coral reefs are relatively small across watersheds, it is possible to achieve large sediment reduction benefits by strategically targeting watersheds located in regions with a high density of corals near to the coast. Thus, reforestation benefits on coral reefs do not necessarily come from the watersheds that produce the highest sediment export. These analyses are key for generating informed action to support both international conservation policy and national restoration activities.
Publisher: Elsevier BV
Date: 11-2021
Publisher: Wiley
Date: 03-01-2022
DOI: 10.1111/ECOG.05844
Abstract: Understanding how ecosystem functioning is impacted by global change drivers is a central topic in ecology and conservation science. We need to assess not only how environmental change affects species richness, but also how the distribution of functional traits (i.e. functional ersity) mediate the relationship between species richness and ecosystem functioning. However, most evidence about the capacity of functional ersity to explain ecosystem functioning has been developed from studies conducted at a single spatial scale. Here, we explore theory, expectations and evidence for why and how species richness and functional ersity relationships vary with spatial scale. Despite the importance of accounting for spatial processes at multiple scales, we show that most studies of the species richness–functional ersity relationship focus on single scale analyses that ignore spatial context. Thus, we discuss the need to establish a spatially explicit, multi‐scale framework for understanding the relationship between species richness and functional ersity. As a starting point to developing such a framework, we detail some expected trajectories and mechanisms by which the ersity of species and functional traits may change across increasing spatial scales. We also explore what is known about two important gaps in the literature about this relationship: 1) the influence of spatial autocorrelation on community assembly processes and 2) the variation in the structure of species interactions across spatial extents. We present some key challenges that could be addressed by integrating approaches from community and landscape ecology. This information will help improve our understanding of the relative influence of local and large‐scale processes on community structure, while providing a foundation for improving bio ersity monitoring, policy and ecosystem function based conservation.
Publisher: Springer Science and Business Media LLC
Date: 06-02-2018
Publisher: Springer Science and Business Media LLC
Date: 10-09-2019
Publisher: Elsevier BV
Date: 11-2015
Location: United States of America
No related grants have been discovered for Andres Felipe Suarez Castro.