Generic-level Phylogeny and Species Delimitation in the Paleoendemic Spider Genus Hypochilus (Araneae, Hypochilidae) PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Generic-level Phylogeny and Species Delimitation in the Paleoendemic Spider Genus Hypochilus (Araneae, Hypochilidae) PDF full book. Access full book title Generic-level Phylogeny and Species Delimitation in the Paleoendemic Spider Genus Hypochilus (Araneae, Hypochilidae) by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 44
Get Book Here
Book Description
Hypochilus is a relictual, Nearctic, paleo-endemic spider often described as a “living fossil”. Commonly known as lampshade spiders, these animals are Short Range Endemics restricted to microhabitats consisting of shaded, mesic, rocky outcrops in three montane geographic regions. Together with the monotypic Ectatostica, these genera constitute the depauperate family Hypochilidae. Previous work has had difficulty in reconstructing the interspecific relationships within Hypochilus and revealed extreme interspecific genetic structure. Previous work has also led to the suspicion of cryptic species within two species of the genus, Hypochilus pococki and Hypochilus petrunkevitchi. This thesis tested the utility of some commonly used delimitation methods on SRE taxa with high levels of genetic structure with the objective of delimiting cryptic species in the genus, as well as reconstructing the generic tree. This work definitively reconstructed the Hypochilus tree using Ectatosticta as an outgroup, as well as found cryptic species within the Californian taxon H. petrunkevitchi in need of taxonomic recognition. It further demonstrated the need for new approaches to species delimitation with challenging taxonomic systems such as SRE taxa.
Author:
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 44
Get Book Here
Book Description
Hypochilus is a relictual, Nearctic, paleo-endemic spider often described as a “living fossil”. Commonly known as lampshade spiders, these animals are Short Range Endemics restricted to microhabitats consisting of shaded, mesic, rocky outcrops in three montane geographic regions. Together with the monotypic Ectatostica, these genera constitute the depauperate family Hypochilidae. Previous work has had difficulty in reconstructing the interspecific relationships within Hypochilus and revealed extreme interspecific genetic structure. Previous work has also led to the suspicion of cryptic species within two species of the genus, Hypochilus pococki and Hypochilus petrunkevitchi. This thesis tested the utility of some commonly used delimitation methods on SRE taxa with high levels of genetic structure with the objective of delimiting cryptic species in the genus, as well as reconstructing the generic tree. This work definitively reconstructed the Hypochilus tree using Ectatosticta as an outgroup, as well as found cryptic species within the Californian taxon H. petrunkevitchi in need of taxonomic recognition. It further demonstrated the need for new approaches to species delimitation with challenging taxonomic systems such as SRE taxa.
Author: Kefyn M. Catley
Publisher:
ISBN:
Category : Cladistic analysis
Languages : en
Pages : 120
Get Book Here
Book Description
Author: Willis John Gertsch
Publisher:
ISBN:
Category : Hypochilus bonneti
Languages : en
Pages : 14
Get Book Here
Book Description
Author: Richard L. Hoffman
Publisher:
ISBN:
Category : Hypochilus gertschi
Languages : en
Pages : 8
Get Book Here
Book Description
Author: David Penney
Publisher:
ISBN: 0957453019
Category : Spiders
Languages : en
Pages : 322
Get Book Here
Book Description
The result is a great increase in multi-disciplinary research and novel avenues incorporating spiders as model organisms.
Author: Trevor R. Hodkinson
Publisher: Cambridge University Press
ISBN: 1139500473
Category : Science
Languages : en
Pages : 543
Get Book Here
Book Description
Climate change has shaped life in the past and will continue to do so in the future. Understanding the interactions between climate and biodiversity is a complex challenge to science. With contributions from 60 key researchers, this book examines the ongoing impact of climate change on the ecology and diversity of life on earth. It discusses the latest research within the fields of ecology and systematics, highlighting the increasing integration of their approaches and methods. Topics covered include the influence of climate change on evolutionary and ecological processes such as adaptation, migration, speciation and extinction, and the role of these processes in determining the diversity and biogeographic distribution of species and their populations. This book ultimately illustrates the necessity for global conservation actions to mitigate the effects of climate change in a world that is already undergoing a biodiversity crisis of unprecedented scale.
Author: Timothy G. Barraclough
Publisher: Oxford University Press
ISBN: 0191066656
Category : Science
Languages : en
Pages : 288
Get Book Here
Book Description
'Species' are central to understanding the origin and dynamics of biological diversity; explaining why lineages split into multiple distinct species is one of the main goals of evolutionary biology. However the existence of species is often taken for granted, and precisely what is meant by species and whether they really exist as a pattern of nature has rarely been modelled or critically tested. This novel book presents a synthetic overview of the evolutionary biology of species, describing what species are, how they form, the consequences of species boundaries and diversity for evolution, and patterns of species accumulation over time. The central thesis is that species represent more than just a unit of taxonomy; they are a model of how diversity is structured as well as how groups of related organisms evolve. The author adopts an intentionally broad approach, stepping back from the details to consider what species constitute, both theoretically and empirically, and how we detect them, drawing on a wealth of examples from microbes to multicellular organisms.
Author: Dalip Kumar Upreti
Publisher: Springer
ISBN: 8132222350
Category : Science
Languages : en
Pages : 240
Get Book Here
Book Description
This book discusses in detail molecular, mycobiont culture, biomonitoring and bioprospection of lichens, providing insights into advances in different fields of lichenology by applying modern techniques and approaches and examining how their application has enhanced or changed classical approaches. It offers a valuable resource, especially for beginners, students and researchers from different academic backgrounds interested in the study of lichens. In recent years, the introduction of modern analytical techniques and approaches has significantly improved our understanding of the environment, including lichens. Lichens are unique organisms which possess untapped potential as effective and reliable bioindicators, sources of therapeutic phytochemicals, and as excellent extremophiles. The unique and peculiar characteristics of lichens underline the need for a multidimensional approach to explore their potential in various fields of environment science, botany and chemistry. Modern techniques, especially molecular techniques, have greatly enriched the field of lichen taxonomy and its position in the plant kingdom, revealing little-known species and exploring their evolutionary history, while multivariate analysis and GIS approaches have established lichens as an ideal and reliable tool for monitoring air pollution. Advanced culture techniques have expanded the pharmacological applications of lichens, which was formerly restricted due to their small biomass. The advent of sophisticated analytical instrumentation has now facilitated the isolation and characterization of lichens’ bioactive constituents, even in lower concentrations, as well as the estimation of their stress responses at different levels of pollution. As lichen diversity is adversely affected by increasing air pollution, there is a pressing need to develop effective management practices to conserve, restore and document lichen diversity.
Author: Karl Patterson Schmidt
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 734
Get Book Here
Book Description
Author: Ming-Hui Chen
Publisher: CRC Press
ISBN: 1466500794
Category : Mathematics
Languages : en
Pages : 398
Get Book Here
Book Description
Offering a rich diversity of models, Bayesian phylogenetics allows evolutionary biologists, systematists, ecologists, and epidemiologists to obtain answers to very detailed phylogenetic questions. Suitable for graduate-level researchers in statistics and biology, Bayesian Phylogenetics: Methods, Algorithms, and Applications presents a snapshot of current trends in Bayesian phylogenetic research. Encouraging interdisciplinary research, this book introduces state-of-the-art phylogenetics to the Bayesian statistical community and, likewise, presents state-of-the-art Bayesian statistics to the phylogenetics community. The book emphasizes model selection, reflecting recent interest in accurately estimating marginal likelihoods. It also discusses new approaches to improve mixing in Bayesian phylogenetic analyses in which the tree topology varies. In addition, the book covers divergence time estimation, biologically realistic models, and the burgeoning interface between phylogenetics and population genetics.
