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A procedure to assess the spatial variability in the importance of abiotic factors affecting distributions： the case of world freshwater fishes

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Current Zoology 2018年第5期64卷 549-557页

作者： Ana M. MANJARRES-HERNANDEZ castor guisande Emilio GARCiA-ROSELLO Patricia PELAYO-VILLAMIL Jacinto GONZALEZ-DAcOSTA Juirgen HEINE Luis GONZALEZ VILAS Carlos GRANADO-LORENClO Santiago R. DUQUE Jorge M. LOBO alnstituto Amazonico de Investigaciones-IMANI Universidad Nacional de Colombia Leticia A.A. 215 Colombia 910001 Facultad de Ciencias del Mar Universidad de Vigo Vigo 36310 Spain Departamento de Informatica Edificio Fundicien Universidad de Vigo Vigo 36310 Spain Grupo de Iciologia Universidad de Antioquia Medellin Colombia 050010 eDepartamento de Biologia Vegetal y Ecologia Facultad de Biologia Universidad de Sevilla Sevilla 41080 Spain Departamento de Biogeografia y Cambio Global Museo Nacional de Ciencias Naturales (CSIC) Calle de Jose Gutierrez Abascal 2 Madrid 28006 Spain

Understanding the factors shaping species＇ distributions is a key longstanding topic in ecology with unresolved issues. The aims were to test whether the relative contribution of abiotic factors that set the geographical range of freshwater fish species may vary spatially and/or may depend on the geographical extent that is being considered. The relative contribution of factors, to discriminate between the conditions prevailing in the area where the species is present and those existing in the considered extent, was estimated with the instability index included in the R pack- age SPEDInstabR. We used 3 different extent sizes： 1） each river basin where the species is present （local）; 2） all river basins where the species is present （regional）; and 3） the whole Earth （global）. We used a data set of 16,543 freshwater fish species with a total of 845,764 geographical records, together with bioclimatic and topographic variables. Factors associated with tempera- ture and altitude show the highest relative contribution to explain the distribution of freshwater fishes at the smaller considered extent. Altitude and a mix of factors associated with temperature and precipitation were more important when using the regional extent. Factors associated with precipitation show the highest contribution when using the global extent. There was also spatial variability in the importance of factors, both between species and within species and from region to region. Factors associated with precipitation show a clear latitudinal trend of decreasing in importance toward the equator.

关键词： anisotropic predictors environmental data selection geographical background non-stationary predictors

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Evidence of functional and structural changes in the microbial community beneath a succulent invasive plant in coastal dunes

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Journal of Plant Ecology 2022年第6期15卷 1154-1167页

作者： Pablo Souza-Alonso Yaiza Lechuga-Lago Alejandra guisande-Collazo Luís González Department of Soil Science and Agricultural Chemistry University of Santiago de Compostela(USC)Escuela Politécnica Superior27002 LugoSpain Laboratory of Plant Ecophysiology Department of Plant Biology and Soil ScienceFaculty of BiologyUniversity of Vigo36310 VigoSpain CITACA Agri-Food Research and Transfer ClusterCampus da AugaUniversity of Vigo32004 OurenseSpain

Coastal dunes represent priority habitats for conservation due to the provision of valuable ecosystem services such as land protection,water supply or biodiversity *** microbial communities are of crucial importance to maintain plant diversity due to harsh environmental conditions,water limitation and nutrient *** alien plants represent a major threat to ecosystem ***,we explored different impacts of Carpobrotus edulis,a succulent plant invading coastal areas worldwide,on the function and structure of bacterial *** represents a challenging substrate due to low organic matter content and limited microbial *** optimized bacterial extraction for functional evaluation before assessing ecosystem impacts produced by *** compared 12 extracting procedures combining different soil storage,sample amount and extracting solutions on the functional activity of sand communities through the community-level physiological *** further explored the function(using Biolog Ecoplates)and structure[using polymerase chain reaction–denaturing gradient gel electrophoresis(PCR-DGGE)]of bacterial communities from dunes invaded by *** solution consistently increased bacterial cells detected by cytometry(P≤0.001).Principal component analysis suggested a limited temporal framework(0–24 h)in which community function can be explored without significant alterations in C substrate *** under *** invasion exhibited a different pattern of C substrate utilization comparing native and non-native zones(interspecific),but also between native zones(intraspecific),suggesting that functional impacts are ***,results obtained from PCR-DGGE indicated that the bacterial community structure of native dunes significantly differed from dunes invaded by ***.

关键词： invasive alien plants(IAPs) Carpobrotus edulis coastal dune ecosystems sand communities sample storage community function bacterial structure

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Diversity Dimensions of Freshwater Fish Species around the World

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Journal of Geographic Information System 2021年第1期13卷 1-18页

作者： Carlos Granado-Lorencio Cástor guisande Patricia Pelayo-Villamil Ana Manjarrés-Hernández Emilio García-Roselló Juergen Heine Elisa Pérez-Costas Luis González-Vilas Jacinto González-Dacosta Jorge M. Lobo Departamento de Biología Vegetal y Ecología Facultad de Biología Universidad de Sevilla Seville Spain Facultad de Ciencias del Mar Universidad de Vigo Campus Lagoas-Marcosende Vigo Spain Grupo de Ictiología Universidad de Antioquia Medellín Colombia Instituto Amazónico de Investigaciones (IMANI) Universidad Nacional de Colombia Leticia Colombia Department of Computer Science Universidad de Vigo Campus Lagoas-Marcosende Vigo Spain Departamento de Biogeografía y Cambio Global Museo Nacional de Ciencias Naturales (CSIC) Madrid Spain

The quality and coverage of the available taxonomical and geographical information and the recognition that diversity is multi-faceted are two main factors that hinder to understand the spatial and temporal variations of biodiversity. In this study, we aim to quantify the global distribution of five diversity components used to assess freshwater fish diversity in river basins around the world. The multidimensional character of these diversity components was estimated and the so obtained diversity dimensions mapped. This was done taking into account those well-surveyed basins discriminated by considering collector’s curves, and additionally by controlling for the effect of survey effort on all considered diversity components. A total of 1,472,109 occurrence records were analysed, corresponding to 17,292 species of freshwater fishes. Five diversity components were considered: functional richness, species richness, taxonomic diversity, and two rarity measures. Well-surveyed river basins were discriminated using accumulation curves. The effects of survey biases and knowledge gaps were minimized by determining the relationship of each component with the completeness values calculated for each river basin. The geographical pattern derived from raw data is skewed by the unequal knowledge available, and all diversity components were positively correlated with completeness values. The first dimension described the association between species richness and functional diversity. The second dimension represented rarity and taxonomic diversity. The congruence between species richness and functional diversity suggests that ecosystem functions increase with the number of fish species present in river basins and that a decrease in species richness may involve a loss of functionality. The levels of rarity and taxonomic diversity of many species-poor basins found in arid and cold regions suggest that the distinctiveness of their freshwater fishes is primarily a consequence of how isol

关键词： Diversity Components Functional Diversity Species Richness Rarity Taxonomic Diversity

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Diversity Dimensions of Freshwater Fish Species around the World

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Journal of Geographic Information System（地理信息系统） 2021年第1期

作者： Carlos Granado-Lorencio Cástor guisande Patricia Pelayo-Villamil Ana Manjarrés-Hernández Emilio García-Rosell Juergen Heine Elisa Pérez-Costas Luis González-Vilas Jacinto González-Dacosta Jorge M. Lobo

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