&lt;strong&gt;Checklist of Hawaiian Anthocerotes and Hepatics&lt;/strong&gt;

Staples, George W.; Imada, Clyde T.

doi:10.11646/bde.28.1.7

Cited by 12 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the western Mediterranean, Corsica and Sardinia, which harbour nearly 10% species endemism in angiosperms, a single endemic bryophyte species has been described (Sotiaux et al, 2009). Even in Hawaii, one of the world's richest hot-spots of endemism, 29.4% and 48.6% of the moss and liverwort species, respectively, are endemic to the archipelago (Staples et al, 2004;Staples & Imada, 2006), whereas the rate of species endemism in angiosperms reaches 90% (Sakai, Wagner & Mehroff, 2002).…”

Section: Gains: Apometzgeria Harpanthus Ptilidiummentioning

confidence: 99%

The ghosts of Gondwana and Laurasia in modern liverwort distributions

et al. 2010

View full text Add to dashboard Cite

Recent advances in phylogenetics and, in particular, molecular dating, indicate that transoceanic dispersal has played an important role in shaping plant and animal distributions, obscuring any effect of tectonic history. Taxonomic sampling in biogeographic studies is, however, systematically biased towards vertebrates and higher plants and the possibility remains that a much stronger signature of ancient vicariance might be evident among other organisms, particularly among basal land plants. Here, an explicit Bayesian model-based approach was used to investigate global-scale biogeographic patterns among liverwort genera and to determine whether the patterns identified are consistent with the expectations of vicariance or dispersal scenarios. The distribution of each genus was mapped onto the phylograms describing the floristic affinities among areas in order to define the synapomorphic transitions supporting the observed groupings. The probabilities of change in a branch were calculated by implementing the Markov model of BayesTraits. The consistent ambiguity in ancestral state reconstructions returned by the unconstrained, two-rate model indicated that the overall signal in the data was weak, leading us to test the performance of competing, explicit models. The analyses resolved clades of geographic areas that are mostly consistent with the kingdoms traditionally identified for plants and animals, but with strikingly lower rates of endemism. The major split observed in the phylograms is into almost entirely Laurasian and Gondwanan clades. Other patterns recovered by the analyses, including Wallace's line and the South Atlantic Disjunction, have also traditionally been interpreted in terms of vicariance. These observations contrast with the idea that, in spore-dispersed organisms like bryophytes and pteridophytes, dispersal obscures evidence of vicariance. However, some discrepancies between the liverwort trees and expectations from a continental drift scenario were observed, such as the sister-group relationship of the Australian and New Zealand floras, which is supported by the co-occurrence of many genera, often endemic to these two areas. Together with an interpretation of the results within a phylogenetic context, our analyses suggest that patterns, which are at first sight consistent with an ancient vicariance hypothesis, may, in fact, conceal a complex mixture of relictual distributions and more recent, asymmetrical dispersal events. Our results provide a framework for testing specific evolutionary hypotheses concerning the extremely low levels of endemism in bryophytes and in particular, the significance of dispersal and cryptic diversification.

show abstract

Section: Gains: Apometzgeria Harpanthus Ptilidiummentioning

confidence: 99%

The ghosts of Gondwana and Laurasia in modern liverwort distributions

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Among bryophytes, two genera (1%) and 178 species are listed as endemic (Staples et al . 2004; Staples & Imada 2006). Of the 880 lichens (Smith 2013), up to 30% are considered endemic (Eldredge & Miller 1995).…”

Section: Introductionmentioning

confidence: 99%

“…While estimates of endemism reach 80% for vascular plants (Wagner et al 1999;Wagner & Herbst 2002;Evenhuis & Eldredge 2002a, b), they are substantially lower for cryptogams. Among bryophytes, two genera (1%) and 178 species are listed as endemic (Staples et al 2004;Staples & Imada 2006). Of the 880 lichens (Smith 2013), up to 30% are considered endemic (Eldredge & Miller 1995).…”

Section: Introductionmentioning

confidence: 99%

The genusLobariella(Ascomycota:Lobariaceae) in Hawaii: late colonization, high inferred endemism and three new species resulting from “micro-radiation”

Lücking¹,

Moncada

Smith³

2017

The Lichenologist

View full text Add to dashboard Cite

We assessed the taxonomy and phylogenetic relationships of Hawaiian species of the neotropical genus Lobariella. A single species was previously reported from the archipelago, the widespread neotropical L. crenulata. We targeted three loci of the mitochondrial and nuclear ribosomal rDNA gene cistron (mtSSU, nuLSU, ITS) and also performed a molecular clock analysis. Our results show that L. crenulata s. str. is seemingly present in the archipelago based on older herbarium collections. However, Hawaiian Lobariella includes three additional, presumably endemic, species unrelated to L. crenulata and new to science: L. flynniana Lücking, Moncada & C. W. Sm., with richly branched marginal phyllidia giving the thallus a fruticose appearance; L. robusta Lücking, Moncada & C. W. Sm., with a rather thick thallus and abundant, large, laminal phyllidia; and L. sandwicensis Lücking, Moncada & C. W. Sm., with a delicate thallus producing apothecia. Lobariella flynniana represents a novel morphotype within the genus, thus far known only from Hawaii. All three species are very closely related, forming a well-supported, monophyletic clade in spite of their morphological differences, suggesting local micro-radiation. Molecular clock analysis indicates that this clade colonized the islands between 1–8 mya and diverged between 0–2 mya. We interpret recent colonization as one of the main reasons why this clade has not diversified further.

show abstract

“…Endemic bryophyte distribution for oceanic archipelagos illustrating, in each case, the number of endemic species in percentage (numbers of species indicated on the bars) having a distribution spanning a given number of islands. The volcanic archipelagos considered are the Azores (number of islands = 9; Gabriel et al ., ), Canaries (7; Losada‐Lima et al ., ), Hawaii (7; Staples et al ., ; Staples & Imada, ) and Galápagos (6; Gradstein & Weber, ). Other complementary sources of information were considered (J. Patiño et al ., in prep.).…”

Section: Introductionmentioning

confidence: 99%

Origin and fate of the single‐island endemic moss Orthotrichum handiense

Patiño

Vanderpoorten

González‐Mancebo

et al. 2012

Journal of Biogeography

View full text Add to dashboard Cite

Aim Our aims were: to determine the evolutionary origin of the single-island endemic moss Orthotrichum handiense; to assess whether its endemicity results from a recent origin or founder event, a loss of dispersal ability, specific habitat requirements, or contraction of a formerly wider range; and to make predictions about its ability to face ongoing climate change.Location Fuerteventura, Canary Islands.Methods The evolutionary origin of O. handiense was determined by phylogenetic analysis and molecular dating. The spatial genetic structure and demographic history of 48 individuals of O. handiense were analysed with intersimple sequence repeat (ISSR) markers through analyses of molecular variance, Mantel tests, mismatch distributions and bottleneck analyses. The macroclimatic envelope of the species was modelled using an ensemble approach of eight species distribution models, and its suitable areas predicted for extant, past (21 ka) and future (2050, 2080) conditions.Results Orthotrichum handiense was resolved as sister to the Californian O. underwoodii and their most recent common ancestor was dated to early Miocene-Pliocene. ISSR analyses revealed extremely low levels of genetic diversity and provided evidence for a recent bottleneck and for isolation-by-distance at the local scale. The different models investigated all pointed to the mismatch between the limited extant distribution and the extent of macroclimatically suitable areas. All models predicted climatic unsuitability on Fuerteventura and Lanzarote at 21 ka, but were conflicting in other areas. A dramatic reduction and loss of suitable areas were predicted for 2050 and 2080, respectively. Main conclusionsThe phylogenetic position of O. handiense points to a long-distance dispersal event from a western North American ancestor and emphasizes the differences in the origin of Macaronesian endemic bryophytes and angiosperms. The predicted absence of suitable macroclimatic conditions in Fuerteventura at 21 ka supports the hypothesis of a palaeoendemic origin and a recent founder event in Fuerteventura, consistent with the low levels of genetic diversity and with evidence for a recent bottleneck. While the biogeographical history of the species hence involves major dispersal events over periods of tens of thousands of years, its ability to respond quickly to predicted climate change during the next few decades is questioned.

show abstract

<strong>Checklist of Hawaiian Anthocerotes and Hepatics</strong>

Cited by 12 publications

References 20 publications

The ghosts of Gondwana and Laurasia in modern liverwort distributions

The ghosts of Gondwana and Laurasia in modern liverwort distributions

The genusLobariella(Ascomycota:Lobariaceae) in Hawaii: late colonization, high inferred endemism and three new species resulting from “micro-radiation”

Origin and fate of the single‐island endemic moss Orthotrichum handiense

Contact Info

Product

Resources

About