Eduardo Chacón-Madrigal

Eduardo Chacón-Madrigal
University of Costa Rica | UCR · Escuela de Biología

Biologist

About

87
Publications
85,755
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,148
Citations
Introduction
I am an ecologist with a particular interest in a magic place called Península de Osa and Golfo Dulce. The Peninsula de Osa has an amazing diversity of plants and animals, which are relatively good conserved. The Peninsula de Osa also has warm and lovely people with great desires to live well and enjoy their home. Currently, I am working there with mammals. Also, I have scientifc questions related to species geographical distributions, functional traits, invasive species and trees.
Additional affiliations
March 2014 - May 2016
University of Vienna
Position
  • PhD Student
March 2008 - present
University of Costa Rica
Position
  • Research Associate
Education
March 2001 - September 2007
University of Costa Rica
Field of study
  • Biología
March 1996 - July 2000
University of Costa Rica
Field of study
  • Biología

Publications

Publications (87)
Article
Full-text available
Identifying the source population of alien species is important to assess the distribution and potential effects in the invaded area. The araneid spider Cyrtophora citricola is widely distributed in Europe, Asia, and Africa; however, in the last 26 years, it has been reported in several countries across the Americas. To date, the geographic origin...
Article
Full-text available
Safeguarding Earth’s tree diversity is a conservation priority due to the importance of trees for biodiversity and ecosystem functions and services such as carbon sequestration. Here, we improve the foundation for effective conservation of global tree diversity by analyzing a recently developed database of tree species covering 46,752 species. We q...
Technical Report
Full-text available
Hace varias décadas fueron introducidos de forma irregular varios monos araña en la Reserva Biológica Islas Negritos (RBIN), posiblemente provenientes de un albergue de vida silvestre de la zona. Sin embargo, debido a la ausencia de un programa de monitoreo de esta población de primates y al hecho de que el SINAC no cuenta con un puesto de vigilanc...
Article
Global bee decline and its impact on pollination in agricultural and natural ecosystems have attracted public attention. However, more data are needed to show their generality and intensity in different ecosystems, especially in the tropics. For centuries, the tropical dry forest (TDF) of Costa Rica underwent intense deforestation, but in the last...
Article
Full-text available
Introducción. Es poca la información sobre concentración foliar de nutrimentos en especies forestales en Centro América. Se hace necesario desarrollar conocimiento que permita manejar de manera satisfactoria la nutrición de estos cultivos. Objetivo. Definir los niveles “normales” de concentración foliar al eliminar los valores atípicos fuera del ra...
Chapter
Central American biota has been shaped by natural biological exchanges resulting from complex geological and climatic events during its formation. However, it has also been significantly affected by the arrival and spread of humans, which introduced domesticated species as well as others that incidentally came with them. Several non-native plant sp...
Article
Full-text available
Publicado en Revista Ambientico: https://www.ambientico.una.ac.cr/revista-ambientico/problemas-asociados-al-manejo-de-la-flora-ornamental-y-la-jardineria-en-costa-rica/?perpage=12&order=DESC&orderby=date&pos=2&source_list=collection&ref=%2Frevista-ambientico%2F
Article
Full-text available
Abstract The cloud forest species Meriania macrophylla (Benth.) Triana has pseudocampanulate flowers with bulbous stamen appendages, typical for the passerine pollination syndrome found in the Melastomataceae tribe Merianieae. The species is further characterized by strong stamen dimorphism (heteranthery), a condition otherwise associated with poll...
Poster
Full-text available
Mammals are among the most threatened groups of animals, with ca. 550 species estimated to be lost during this century. Protected areas (PA) are the primary strategy that we have to halt this loss. However, PA in public lands has high social and economic costs. Therefore, it is necessary to evaluate PA's efficiency in private lands and the factors...
Article
Significance Invasive alien species pose major threats to biodiversity and ecosystems. However, identifying drivers of invasion success has been challenging, in part because species can achieve invasiveness in different ways, each corresponding to different aspects of demographics and distribution. Employing a multidimensional perspective of invasi...
Article
The internal temperature of nests largely depends on the materials used in their construction because the characteristics of each material affect the isolation of nest walls. In urban environments, the availability of natural materials for nest building decreases, while the availability of artificial materials increases. Therefore, many urban bird...
Article
Aim Here we examine the functional profile of regional tree species pools across the latitudinal distribution of Neotropical moist forests, and test trait–climate relationships among local communities. We expected opportunistic strategies (acquisitive traits, small seeds) to be overrepresented in species pools further from the equator, but also in...
Chapter
Costa Rica is one of the most diverse countries in the Neotropics. It has the highest species concentration per unit area of terrestrial ecosystems. The country has a vascular flora of approximately 10 712 species, of which 1048 (9.7%) are introduced, and of these, 47 (0.4%) are considered invasive. Invasive plants are linked to species extinctions...
Article
Full-text available
Plant functional trait variation in tropical forests results from taxonomic differences in phylogeny and associated genetic differences, as well as, phenotypic plastic responses to the environment. Accounting for the underlying mechanisms driving plant functional trait variation is important for understanding the potential rate of change of ecosyst...
Article
Full-text available
Background and Aims The acquisitive-conservative axis of plant ecological strategies results in a pattern of leaf trait covariation that captures the balance between leaf construction costs and plant growth potential. Studies evaluating trait covariation within species are scarcer, and have mostly dealt with variation in response to environmental g...
Preprint
Full-text available
Both historical and contemporary environmental conditions determine present biodiversity patterns, but their relative importance is not well understood. One way to disentangle their relative effects is to assess how different dimensions of beta-diversity relate to past climatic changes, i.e., taxonomic, phylogenetic and functional compositional dis...
Data
El archivo es una base de datos de las plantas exóticas (introducidas) más comunes presentes en Costa Rica.
Article
Full-text available
Bat diversity and activity have been documented to change with elevation and to be correlated with temperature variation, especially in temperate regions. Acoustic elevational studies of insectivorous bat fauna in tropical mountains are scarce. Here, we investigated diversity, general and species-specific activity patterns of aerial insectivorous b...
Article
Bat diversity and activity have been documented to change with elevation and to be correlated with temperature variation, especially in temperate regions. Acoustic elevational studies of insectivorous bat fauna in tropical mountains are scarce. Here, we investigated diversity, general and species-specific activity patterns of aerial insectivorous b...
Preprint
Full-text available
Trees are of vital importance for ecosystem functioning and services at local to global scales, yet we still lack a detailed overview of the global patterns of tree diversity and the underlying drivers, particularly the imprint of paleoclimate. Here, we present the high-resolution (110 km) worldwide mapping of tree species richness, functional and...
Article
Full-text available
Background Urban expansion has been identified as one of the leading drivers of biodiversity change or loss. For birds, urbanization is specifically related to survival, breeding success, and territory size. Understanding how different birds adjust territory size in response to urbanization is essential for their conservation in urban environments...
Preprint
Full-text available
Although trees are key to ecosystem functioning, many forests and tree species across the globe face strong threats. Preserving areas of high biodiversity is a core priority for conservation; however, different dimensions of biodiversity and varied conservation targets make it difficult to respond effectively to this challenge. Here, we (i) identif...
Article
Full-text available
Tropical rainforests harbor exceptionally high biodiversity and store large amounts of carbon in vegetation biomass. However, regional variation in plant species richness and vegetation carbon stock can be substantial, and may be related to the heterogeneity of topoedaphic properties. Therefore, aboveground vegetation carbon storage typically diffe...
Article
Full-text available
Intraspecific trait variation (ITV) within natural plant communities can be large, influencing local ecological processes and dynamics. Here, we shed light on how ITV in vegetative and floral traits responds to large‐scale abiotic and biotic gradients (i.e., climate and species richness). Specifically, we tested whether associations of ITV with tem...
Article
Full-text available
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research sp...
Article
Full-text available
The Golfo Dulce region located in southwestern Costa Rica represents one of the remnant global biodiversity hotspots containing the largest Pacific lowland tropical forest in Central America. Recent biogeographical analyses revealed a close relation of taxonomic tree species composition to northern South America. However, the underlying factors lea...
Article
Recent studies have reported a consistent pattern of strong dominance of a small subset of tree species in neotropical forests. These species have been called “hyperdominant” at large geographical scales and “oligarchs” at regional-landscape scales when being abundant and frequent. Forest community assembly is shaped by environmental factors and st...
Article
Full-text available
This dataset provides the Global Naturalized Alien Flora (GloNAF) database, version 1.2. GloNAF represents a data compendium on the occurrence and identity of naturalized alien vascular plant taxa across geographic regions (e.g. countries, states, provinces, districts, islands) around the globe. The dataset includes 13,939 taxa and covers 1,029 reg...
Article
Full-text available
The information about nutritional aspects of trees in the tropical dry forest is scarce. This investigation aims to establish a normal range of foliar nutrient concentration to four forestry species as related to their growth rates and biological nitrogen fixation capacity in the seasonally dry ecosystem at Guanacaste, Costa Rica. Foliar samples fo...
Article
Full-text available
The reasons why the range size of closely related species often varies significantly have intrigued scientists for many years. Among other hypotheses, species with high trait variation were suggested to occupy more diverse environments, have more continuity in their distributions, and consequently have larger range sizes. Here, using 34 tree specie...
Data
Coefficients estimated (β) ± 1 standard error and the associated test statistics for mixed effects models evaluating the effect of the sample size on the coefficient of variation for eight functional traits analysed in 34 neotropical trees species. (DOCX)
Data
Fixed effects coefficients (β ± 1 standard error), derived from linear mixed effects models, for the effects of environmental variables measured on eight functional traits in 335 individual trees of 34 species, using species identity as a random effect. The functional traits included in the analysis were: Leaf area (LA), leaf thickness (LT), specif...
Data
Seed size (length x width) and seed dispersers of the 34 neotropical tree species used in the analysis. B: Birds, M: mammals. (DOCX)
Data
Frequency distributions of the coefficients of variation of eight functional traits in 34 tropical trees species. The dotted vertical line indicates the mean of the coefficients of variation. Leaf area (LA), leaf dry matter content (LDMC), leaf thickness (LT), specific leaf area (SLA), leaf nitrogen content (N), leaf phosphorus content (P), leaf N:...
Data
Coefficients of variation (CV) of three environmental variables used to characterize the sampled trees’ growing sites: crown light exposure, the slope of the growing sites and local climate. Each point represents one pair of congeneric endemic and widespread species. The diagonal represents the null model, i.e. positioning of points along the line...
Data
Correlation between bioclimatic variables within the tropical region (23.5° N-23.5°S) in America. (XLSX)
Data
Principal component analysis of six functional traits measured in 335 individual trees of 34 species. The functional traits included in the analysis were: Leaf area (LA), leaf thickness (LT), specific leaf area (SLA), leaf nitrogen content (N), leaf phosphorus content (P), and wood specific gravity (WSG). (DOCX)
Data
Global Biodiversity Information Facility Data Providers. (XLSX)
Data
Graphical display of the univariate linear regression models of eight functional traits against three environmental variables (climate, crown light exposure and slope inclination of growing site). Red squares indicate models with p-value< 0.1. Functional traits are abbreviated as follows: leaf area (LA), leaf dry matter content (LDMC), leaf thickne...
Data
Mantel tests (based on Pearson's correlation coefficient) between the geographical distance of individuals and the absolute difference between the trait values of the individuals for eight functional traits in 34 neotropical tree species. Correlation coefficients significantly different from zero (p<0.05) are presented with color. (TIFF)
Data
Coefficients of variation (CV) in eight functional traits using all combinations of possible pairs of endemic and widespread congeners from 17 genera of neotropical tree species. (TIFF)
Data
Coefficients of variation (CV) in eight functional traits of 17 congeneric pairs of endemic neotropical tree species and their widespread congeners after removing variation attributable to three measured environmental variables. Leaf area (LA), leaf thickness (LT), specific leaf area (SLA) and leaf dry matter content (LDMC), wood specific gravity (...
Data
Functional dispersion calculated from six functional traits after removing variation attributable to variation in measured environmental variables for the studied 34 tropical tree species. A) Functional dispersion in relation to the range size. B) Functional dispersion (FD) of 17 congeneric pairs of endemic species and their widespread congeners. I...
Data
Linear relationships between the mean and the coefficient of variation of wood specific gravity and leaf nitrogen content among the 34 neotropical tree species analyzed. The regression line is represented by a solid line when the effect of the regressor was significantly different from zero, and with a dotted line when it was not significant. (TIFF...
Data
Pearson's correlation coefficients between tree size (diameter at breast height) and eight functional traits in 34 neotropical tree species. Correlation coefficients significantly different from zero (p<0.05, 20 out of 272) are presented with color. (TIFF)
Data
Methods of functional trait measurements. (DOCX)
Data
Coefficients of variation of eight functional traits and multivariate functional dispersion (FD) for 34 neotropical tree species. Traits: Leaf area (LA), leaf dry matter content (LDMC), leaf thickness (LT), specific leaf area (SLA), leaf nitrogen content (N), leaf phosphorus content (P), leaf N:P ratio (NP) and wood specific gravity (WSG). (DOCX)
Data
Estimated ages of species included in the present analysis according to available phylogenies [75–77]. (DOCX)
Data
Functional dispersion (FD) of 17 congeneric pairs of endemic neotropical tree species and their widespread congeners, using all combinations of possible pairs of endemic and widespread congeners from 17 genera of neotropical tree species. (TIFF)
Data
Maps of the geographic ranges of the 34 tree species studied. (DOCX)
Article
Biological traits may co-determine differences in geographical range sizes among closely related species. In plants, trait values linked to a conservative resource-use strategy have been hypothesised to be associated with small range sizes. However, the empirical support is mixed and limited to extra-tropical species so far. Here, we analyse the re...
Article
Full-text available
Using the recently built Global Naturalized Alien Flora (GloNAF) database, containing data on the distribution of naturalized alien plants in 482 mainland and 362 island regions of the world, we describe patterns in diversity and geographic distribution of naturalized and invasive plant species, taxonomic, phylogenetic and life-history structure of...
Article
Full-text available
Ornamental fish trade is a growing business around the world, but also a major pathway for the introduction of potentially invasive species. Trade patterns and policies have been evaluated in high-income countries while developing countries in tropical regions have been overlooked, even when they are especially vulnerable to invasions by aquarium f...
Data
Species list and number of live individuals of each species imported into Costa Rica between 1998 and 2004. The current taxonomic classification and habitat type (freshwater, marine or both) are also shown. Please consider using the following citation for this material: AllenPE, BarqueroMD, BermúdezE, CalderónJC, HiljeB, Pineda W, Saborío-Rodríguez...
Article
We described the achenes of 21 species of the genus Scleria reported in Costa Rica using 16 morphological characters and developed a key based only on achene characteristics. Specimens deposited in herbaria in Costa Rica were analyzed. We observed the achenes using a stereoscope and light microscope and took digital images that were used to measure...
Article
Full-text available
Successful forest restoration in tropical environments is limited by the paucity of studies on the initial establishment and early survival requirements of seedlings of most native tropical tree species under disturbed conditions. Here, we evaluated the initial growth responses and the regeneration potential of seedlings of five tree species native...
Conference Paper
The inter-specific variation (IV) of geographical range size (GRS) is still an open question. The ecological niche has a major role within hypotheses proposed to explain that variation. Although many ecological factors affect the species GRS, some studies support a correlation between the niche breadth and the GRS. In particular, IV in functional t...
Article
Full-text available
Use of vegetated urban parks by insectivorous bats in San José, Costa Rica. We evaluated habitat use of insectivorous bats in five urban parks in San José, Costa Rica. Three sessions of acoustic monitoring were carried out for three nights, between 18:00-19:30 h. A total of 457 recordings (402/large parks, 44/small parks, 11/controls) were obtained...
Article
Full-text available
All around the globe, humans have greatly altered the abiotic and biotic environment with ever-increasing speed. One defining feature of the Anthropocene epoch is the erosion of biogeographical barriers by human-mediated dispersal of species into new regions, where they can naturalize and cause ecological, economic and social damage. So far, no com...
Article
We evaluated habitat use of insectivorous bats in five urban parks in San José, Costa Rica. Three sessions of acoustic monitoring were carried out for three nights, between 18:00-19:30 h. A total of 457 recordings (402/large parks, 44/small parks, 11/controls) were obtained. Large parks were sites of greater richness and activity than those lacking...
Article
We describe and illustrate the life history and immature stages of Anthonomus monostigma Champion (Curculionidae: Curculioninae: Anthonomini). This weevil is a fruit borer in Miconia calvescens DC (Melastomataceae), a Neotropical tree that is invasive in Pacific islands. The larva has three instars, and development from egg to adult requires approx...
Chapter
Full-text available
Hauya eleganas subsp. lucida (Onagraceae) un árbol escazo, cuya distribución posiblemente era en las áreas actualmente más deforestadas del Bosque Tropical Seco y en el Bosque Húmedo Premontano. Fotografía: Eduardo Chacón.