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Juli Caujapé-Castells

Juli Caujapé-Castells
Jardín Botánico Canario "Viera y Clavijo"-Unidad Asociada CSICCabildo de Gran Canaria

Dr.

About

134
Publications
34,135
Reads
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2,703
Citations
Citations since 2017
34 Research Items
1328 Citations
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
Additional affiliations
July 2014 - present
Independent Researcher
Independent Researcher
Position
  • Managing Director
September 1999 - present
Independent Researcher
Independent Researcher
Position
  • Head of Department
Description
  • http://www.bioclimac.com/mbdna
December 1996 - November 1998
The University of Texas at Austin
Position
  • Post-doctoral research scholar

Publications

Publications (134)
Article
Full-text available
Premise of the study: Plants endemic to oceanic archipelagos are suitable for studying evolution, being isolated on substrates of different ages. Evolution has been recent, rendering traditionally-employed sequences insufficiently variable for resolving relationships. This study includes sampling in the genus Tolpis (Asteraceae) from the Azores, M...
Article
We explore the idea that most pre‐glacial non‐endemic Canarian flora became endemic to the archipelago by the extinction of its mainland populations during the late Pleistocene glaciations, implying that the extant non‐endemic flora is mostly post‐glacial: the ‘late Pleistocene endemicity increase hypothesis’. The native flora of the Canarian archi...
Preprint
Disjunct distribution is a key issue in biogeography and ecology, but it is often difficult to determine relative roles of dispersal vs. vicariance in disjunctions. Conandron ramondioides (Gesneriaceae) is a tertiary relict monotypic species distributed disjunctively in mainland China, Taiwan Island and Japan, where is a key region for understandin...
Article
Aim It is predicted that insular plant taxa have evolved reduced defences in response to lower herbivore pressure on islands. However, the few studies testing this hypothesis have addressed variation in individual defensive traits, without paying attention to patterns of correlated trait expression (i.e. defence syndromes). Location Balearic and C...
Article
El proyecto NEXTGENDEM (MAC2/4.6d/236, https://lupus.itccanarias.org/nextgendem/es/) complementa múltiples disciplinas de investigación para proporcionar datos científicos contrastados y validados que faciliten a los gestores la toma de decisiones de conservación más informadas. A consecuencia de la movilización y el enriquecimiento de los bancos d...
Article
Oceanic islands are natural laboratories where evolutionary processes can be studied more readily. In the present work we use nuclear microsatellites to quantitatively assess the roles of hybridization, colonization, gene flow and geographical barriers in four Parolinia spp. endemic to Gran Canaria in connection with known geological events through...
Article
Full-text available
Insular woodiness (IW), referring to the evolutionary transition from herbaceousness toward woodiness on islands, has arisen more than 30 times on the Canary Islands (Atlantic Ocean). One of the IW hypotheses suggests that drought has been a major driver of wood formation, but we do not know in which palaeoclimatic conditions the insular woody line...
Article
Full-text available
The rich endemic flora of the Macaronesian Islands places these oceanic archipelagos among the top biodiversity hotspots worldwide. The radiations that have determined the evolution of many of these insular lineages resulted in a wealth of endemic species, many of which occur in a wide range of ecological niches, but show small distribution areas i...
Article
With a wide distribution range including Europe and Asia, Lotus (Leguminosae) represents the largest genus within Loteae. It is particularly diverse in the Mediterreanean region and in the five archipelagos of Macaronesia (Atlantic Ocean). However, little is known about the relationships among the 14 sections currently recognized within Lotus and a...
Article
Full-text available
Islands provide unique opportunities to integrated research approaches to study evolution and conservation because boundaries are circumscribed, geological ages are often precise, and many taxa are greatly imperiled. We combined morphological and hybridization studies with high-throughput genotyping platforms to streamline relationships in the enda...
Article
Full-text available
The genus Dracaena in Macaronesia comprises two threatened species of arborescent monocots that are often associated with one of the most intriguing biogeographic disjunctions: the Rand Flora pattern. Molecular information is, however, largely missing for the Macaronesian Dracaena taxa ("MDT", hereafter), and the biogeographic or population genetic...
Article
Full-text available
Molecular dating offers a tool for inferring the time of divergence between two lineages. In this study, we discuss how dated molecular reconstructions are informative of two different, albeit often intermingled, time estimates with regard to a fundamental process in island biogeography: the time of island colonization (TIC). We illustrate how stem...
Article
Full-text available
Subtropical islands are often viewed as refuges where Quaternary climatic shifts driving global episodes of extinction were buffered. Island biodiversity, however, may have been impacted by climatic fluctuations at local scales, particularly in spatially heterogeneous island systems. In this study, we generated a conceptual framework for predicting...
Article
Full-text available
Understanding patterns of community structure and the causes for their variation can be furthered by comparative biogeographic analyses of island biotas. We used woody plant data at the local scale to investigate variations in species rarity, alpha, beta, and gamma diversity within and between three islands from the oceanic archipelagoes of Azores,...
Article
Full-text available
Plumbaginaceae is characterized by a history of multiple taxonomic rearrangements and lacks a broad molecular phylogenetic framework. Limonium is the most species‐rich genus of the family with ca. 600 species and cosmopolitan distribution. Its center of diversity is the Mediterranean region, where ca. 70% of all Limonium species are endemic. In thi...
Article
Full-text available
Background and aims: Archipelagos provide a valuable framework for investigating phenotypic evolution under different levels of geographical isolation. Here, we analysed two co-distributed, widespread plant lineages to examine if incipient island differentiation follows parallel patterns of variation in traits related to dispersal and colonization...
Article
Full-text available
Aim Species–area relationships (SARs) on oceanic archipelagos are shaped at least as much by speciation as by immigration–extinction dynamics. We examine three well‐studied Atlantic archipelagos to quantify the relative contributions of colonization and diversification to individual and whole‐archipelago floras. Location Three Macaronesian archipe...
Article
Full-text available
Background and aims: Various studies and conservationist reports have warned about the contraction of the last subtropical Afro-Macaronesian forests. These relict vegetation zones have been restricted to a few oceanic and continental islands around the edges of Africa, due to aridification. Previous studies on relict species have generally focused...
Article
Full-text available
We developed and characterized microsatellite markers for the genus Lotus, a large genus of leguminous plants containing many endemic species of conservation interest. The marker system was then used to survey patterns of population genetic variation of Lotus sessilifolius, a Canary Island endemic occurring on four islands (La Palma, El Hierro, La...
Article
Full-text available
Hybridization is recognized as an important process in plant evolution, and this may be particularly true for island plants where several biotic and abiotic factors facilitate interspecific hybridization. Although rarely done, experimental studies could provide insights into the potential of natural hybridization to generate diversity when species...
Article
Full-text available
The loss of dispersal on islands hypothesis (LDIH) posits that wind-dispersed plants should exhibit reduced dispersal potential, particularly if island populations are old. In this study, we tested this hypothesis using a detailed phylogeographical framework across different geographical scales. Mainland and island areas of the Atlantic and Mediter...
Article
Full-text available
Oceanic archipelagos are typically rich in endemic taxa, because they offer ideal conditions for diversification and speciation in isolation. One of the most remarkable evolutionary radiations on the Canary Islands comprises the 16 species included in Limonium subsection Nobiles, all of which are subject to diverse threats, and legally protected. S...
Article
Using a series of standardised sampling plots within forest ecosystems in remote oceanic islands, we reveal fundamental differences between the structuring of aboveground and belowground arthropod biodiversity that are likely due to large-scale species introductions by humans. Species of beetle and spider were sampled almost exclusively from single...
Article
• In the generally bee‐pollinated genus Lotus a group of four species have evolved bird‐pollinated flowers. The floral changes in these species include altered petal orientation, shape and texture. In Lotus these characters are associated with dorsiventral petal identity, suggesting that shifts in the expression of dorsal identity genes may be invo...
Article
Full-text available
The importance of the conservation of genetic diversity is highlighted in international agreements such as the Convention on Biological Diversity and the Global Strategy for Plant Conservation. In this investigation, we use the information contained in the two core cpDNA barcode sequences (matK y rbcL) to (1) estimate the Phylogenetic Diversity (PD...
Article
Full-text available
Abstract Background Oceanic archipelagos typically harbour extensive radiations of flowering plants and a high proportion of endemics, many of which are restricted to a single island (Single Island Endemics; SIEs). The Azores represents an anomaly as overall levels of endemism are low; there are few SIEs and few documented cases of intra-archipelag...
Article
Full-text available
We used data from 12 allozyme loci for two endemic Brassicaceae from Gran Canaria (the endangered narrow endemic Crambe tamadabensis and its more widespread congener C. pritzelii) to assess whether their genetic diversity patterns reflect their phylogenetic closeness and contrasting population sizes and distribution areas, and to derive conservatio...
Article
Full-text available
We review the conservation status and threats to the endemic vascular flora of the Cape Verde islands, mostly based on the past two decades of collecting, literature review and herbarium specimens. The application of IUCN Red List criteria and categories using RAMAS software reveals that 78% of the endemic plants are threatened (29.3% Critically En...
Conference Paper
The order Helotiales Nannf. is one of the major groups of apothecial fungi, recognized within Ascomycota Caval.‐Sm. It is the most diverse order in Leotiomycetes O. E. Erikss. & Winka, with ca. 2.036 known species in 487 genera. Until recently, there were 13 families recognized. After the first comprehensive phylogenetic study of helotialean fungi...
Article
Full-text available
The Macaronesian laurel forests (MLF) are dominated by trees with a laurophyll habit comparable to evergreen humid forests which were scattered across Europe and the Mediterranean in the Paleogene and Neogene. Therefore, MLF are traditionally regarded as an old, 'Tertiary relict' vegetation type. Here we address the question if key taxa of the MLF...
Article
Full-text available
Insular species are expected to have low genetic diversity, for their populations are often small and isolated, and characterized by restricted gene flow and increased incidence of inbreeding. However, empirical results do not always match this expectation. For example, population genetic analyses of several Canarian endemics, based mainly on alloz...
Article
Full-text available
• Endemic plants on oceanic islands have long served as model systems for studying patterns and processes of evolution. However, phylogenetic studies of island plants frequently illustrate a decoupling of molecular divergence and ecological/morphological diversity, resulting in phylogenies lacking the resolution required to interpret patterns of ev...
Article
Full-text available
Ecological and evolutionary studies largely assume that island populations display low levels of neutral genetic variation. However, this notion has only been formally tested in a few cases involving plant taxa, and the confounding effect of selection on genetic diversity (GD) estimates based on putatively neutral markers has typically been overloo...
Article
Full-text available
We report the development of eight nuclear microsatellite loci (SSR) for Parolinia ornata Webb (Brassicaceae), an endemic species from the island of Gran Canaria (Canary Islands) that belongs to the Canarian endemic genus Parolinia. Following evaluation of 36 individuals sampled in one population, all loci showed polymorphism, and displayed 33 alle...
Article
Full-text available
Plant DNA barcoding currently relies on the application of a two-locus combination, matK+rbcL. Despite the universality of these two gene regions across plants, it is suspected that this combination might not have sufficient variation to discriminate closely related species. In this study we tested the performance of this two-locus plant barcode al...
Article
Full-text available
The phylogeny of Orbilia aurantiorubra and related species is inferred from ITS sequence data. Orbilia aurantiorubra is redefined according to vital taxonomy. Integrated analyses of molecular and morphological data, and ecological (e.g. substrate) and geographical origin suggest the existence of three new species, which are described in this paper:...
Article
We used plastid sequences (trnL, trnL-trnF, petN-psbM and trnT-trnL) to infer the phylogenetic relationships and inter-island connections of the Canarian Juniperus cedrus, and AFLP fingerprints to assess its genetic diversity patterns. Maximum Likelihood, Maximum Parsimony and Bayesian methods suggest independent colonization events for the three M...
Article
We use a comprehensive subset of Canarian angiosperms corresponding to 23 families, 35 genera, and 60 Canarian endemic taxa to test if this flora is suitable to taxonomic identification with the two proposed plant DNA barcode sequences, and if these sequences may reveal the existence of cryptic species overlooked by morphology. The rate of discrimi...
Article
Ecological conditions, such as high habitat diversity and the absence of competitors, have been proposed as key determinants of the patterns of speciation observed in oceanic island floras. However, the relationship between plant traits and lineage diversification has received less attention. Here, we review 120 published phylogenetic and populatio...
Article
Full-text available
We assess population genetic structure and variability in the endangered Azorean endemic Viburnum treleasei Gand., an evergreen shrub or small tree, occurring in eight out of nine islands of the archipelago. We combine RAPD and ISSR markers in eight populations and four islands covering the three subgroups of islands that compose the archipelago, a...
Conference Paper
Full-text available
The Rand flora is a disjunct floristic pattern relating semiarid and subtropical floras between Macaronesia and East Africa. One of the best examples is the bellflower genus Canarina, comprising one species in the Canary Islands (C. canariensis), and two other species endemic to the Afromontane region of East Africa (C. eminii and C. abyssinica). T...
Article
On the base of a morphological detailed study, also supported by the previous published results on the phylogeny of the genus Matthiola, we concluded that the Sect. Acinotum of this genus is represented in the Canary Islands only by two species. One of them, widespread in the Mediterranean region (M. parviflora), and another one M. bolleana mainly...
Article
We analyzed the evolution of red/orange flowers in four putatively bird-pollinated species of Macaronesian Lotus, with the aim of investigating whether this floral trait evolved from a similar trait found in some entomophilous Lotus species, namely the ability to modify flower color to red after anthesis. First, we mapped the ability to modify flow...
Article
Full-text available
Background and AimsSeed dormancy varies within species in response to climate, both in the long term (through ecotypes or clines) and in the short term (through the influence of the seed maturation environment). Disentangling both processes is crucial to understand plant adaptation to environmental changes. In this study, the local patterns of seed...
Article
Full-text available
Many plant species combine sexual and clonal reproduction. Clonal propagation has ecological costs mainly related to inbreeding depression and pollen discounting; at the same time, species able to reproduce clonally have ecological and evolutionary advantages being able to persist when conditions are not favorable for sexual reproduction. The prese...
Article
Full-text available
† Background and Aims: Allozyme and reproductive data sets for the Canarian flora are updated in order to assess how the present levels and structuring of genetic variation have been influenced by the abiotic island traits and by phylogenetically determined biotic traits of the corresponding taxa; and in order to suggest conservation guidelines. †...
Article
Full-text available
Transformer-4 version 2.0.1 (T4) is a multi-platform freeware programmed in java that can transform a genotype matrix in Excel or XML format into the input formats of one or several of the most commonly used population genetic software, for any possible combination of the populations that the matrix contains. T4 also allows the users to (i) draw al...
Article
Full-text available
We analyzed the ITS2 primary and secondary structure (including Compensatory Base Changes (CBCs)) of 17 new Dunaliella strains (11 D. viridis, two D. tertiolecta, and four Dunaliella sp.), and compared these with other Dunaliella sequences available from the ITS2 database to circumscribe their taxonomic position. The ITS2 primary and secondary stru...
Article
Ecological conditions, such as high habitat diversity and the absence of competitors, have been proposed as key determinants of the patterns of speciation observed in oceanic island floras. However, the relationship between plant traits and lineage diversification has received less attention. Here, we review 120 published phylogenetic and populatio...
Article
Full-text available
Bird pollination has evolved in four species of Macaronesian Lotus from a bee-pollinated ancestor. The transition is associated with the modification of several floral traits, including flower color and size, relative size and orientation of the petals, and nectar composition and quantity. Here, we examine petal surface micromorphology in relation...
Article
The four red-flowered, apparently bird-pollinated Lotus species from the Canary Islands have previously been classified in their own genus, Rhyncholotus. Currently, they are considered as a separate section within genus Lotus, distinct from other herbaceous Canarian congeners which are yellow-flowered and bee-pollinated. A combined analysis of four...
Article
Full-text available
We used an ITS2 primary and secondary structure and Compensatory Base Changes (CBCs) analyses on new French and Spanish Dunallela salina strains to investigate their phylogenetic position and taxonomic status within the genus Dunaliella. Our analyses show a great diversity within D. salina (with only some clades not statistically supported) and rev...
Data
Compensatory Base Changes (CBC) analysis. Compensatory Base Changes (CBCs) between different groups and species within the Dunaliella taxon (Excel file).
Data
Full-text available
Taxon names, geographical area, locality, voucher information and GeneBank accession numbers for the Juniperus samples included in the phylogenetic analysis. Coding numbers as in Fig. 2. Voucher abbreviations: BR: B. Rumeu collection numbers, as coded in the DNA Bank at the Jardín Botánico Canario ‘Viera y Clavijo’-Unidad Asociada CSIC; JM: J. Mart...
Data
Plant material used for sequencing petN-psbM, trnS-trnG and trnT-trnL from 72 samples. N is the number of samples collected in each locality, voucher source indicates each tree sampled and H is the haplotype found. Voucher abbreviations: BR: B. Rumeu collection numbers, as coded in the DNA Bank at the Jardín Botánico Canario ‘Viera y Clavijo’- Unid...
Article
Full-text available
A central aim of island biogeography is to understand the colonization history of insular species using current distributions, fossil records and genetic diversity. Here, we analyze five plastid DNA regions of the endangered Juniperus brevifolia, which is endemic to the Azores archipelago. The phylogeny of the section Juniperus and the phylogeograp...