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Diversity
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Biodiversity Feature Papers
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Biodiversity Feature Papers

A special issue of Diversity (ISSN 1424-2818).

Deadline for manuscript submissions: closed (30 October 2009) | Viewed by 55920

Special Issue Editor

Dr. Kostas Triantis

E-Mail Website
Guest Editor
Department of Ecology and Taxonomy, Faculty of Biology, National and Kapodistrian University of Athens (NKUA), Panepistimioupoli Zografou, GR-15784 Athens, Greece
Interests: island biogeography and macroecology; scale in ecological and biogeographical analysis; environmental heterogeneity and conservation biogeography

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Published Papers (4 papers)

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Research

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1034 KiB  
Article
Three Continents Claiming an Archipelago: The Evolution of Aegean’s Herpetofaunal Diversity
by Petros Lymberakis and Nikos Poulakakis
Diversity 2010, 2(2), 233-255; https://doi.org/10.3390/d2020233 - 16 Feb 2010
Cited by 83 | Viewed by 10327
Abstract
The area of the Aegean can be described as one of nature’s most active laboratories. The contemporary geomorphology of the Aegean is a result of diverse and still ongoing geological events, which coupled with climate changes, have created mountains and thousands of islands. [...] Read more.
The area of the Aegean can be described as one of nature’s most active laboratories. The contemporary geomorphology of the Aegean is a result of diverse and still ongoing geological events, which coupled with climate changes, have created mountains and thousands of islands. The Aegean bridges three continents, where human activity has been recorded for at least 10,000 years. Herpetofauna diversity offered early researchers the possibility of describing patterns in the Aegean, especially as the distributional limit for several species and faunal elements. The patterns initially described at a rather coarse scale formed the frame on which the application of new techniques opened new views and permitted finer analyses. Here, we assess recent works on the Aegean’s herpetofauna, outlining the role of sea barriers, especially the Mid Aegean Trench (MAT). We propose four basic patterns (pre-MAT, post-MAT, newcomers, and that of an outlier) and discuss exceptions to these patterns, to interpret the diversity recorded. The interdisciplinary study of taxonomy helps explaining the observed diversity and provides powerful arguments for how exploring diversity can be used to explain more than biological processes. Full article
(This article belongs to the Special Issue Biodiversity Feature Papers)
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337 KiB  
Article
Polymorphisms within the Toll-Like Receptor (TLR)-2, -4, and -6 Genes in Cattle
by Marco Mariotti, John L. Williams, Susana Dunner, Alessio Valentini and Lorraine Pariset
Diversity 2009, 1(1), 7-18; https://doi.org/10.3390/d1010007 - 30 Jul 2009
Cited by 23 | Viewed by 11105
Abstract
In mammals, members of the TLR gene family play a primary role in the recognition of pathogen-associated molecular patterns from bacteria, viruses, protozoa and fungi. Recently, cattle TLR genes have been mapped to chromosomes using a radiation hybrid panel. Nucleotide sequences of bovine [...] Read more.
In mammals, members of the TLR gene family play a primary role in the recognition of pathogen-associated molecular patterns from bacteria, viruses, protozoa and fungi. Recently, cattle TLR genes have been mapped to chromosomes using a radiation hybrid panel. Nucleotide sequences of bovine TLR2, TLR4 and TLR6 genes were screened to identify novel SNPs that can be used in studies of cattle resistance to diseases. In total, 8 SNPs were identified and were submitted to the NCBI dbSNP database. The frequencies of the SNPs were assessed in 16 different bovine European cattle breeds and a phylogenetic analysis carried out to describe the relationships between the breeds. Even if from our analysis the SNPs do not appear located in loci under selection, a deviation of three SNPs from Hardy Weinberg equilibrium was observed, and we hypothesize that some of the polymorphisms may be fixated since many generations. The described variations in immune function related genes will contribute to research on disease response in cattle. In fact, the SNPs can be used in association studies between polymorphisms and cattle resistance to diseases. Full article
(This article belongs to the Special Issue Biodiversity Feature Papers)
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Review

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517 KiB  
Review
The Brazilian Pampa: A Fragile Biome
by Luiz Fernando Wurdig Roesch, Frederico Costa Beber Vieira, Vilmar Alves Pereira, Adriano Luis Schünemann, Italo Filippi Teixeira, Ana Julia Teixeira Senna and Valdir Marcos Stefenon
Diversity 2009, 1(2), 182-198; https://doi.org/10.3390/d1020182 - 21 Dec 2009
Cited by 179 | Viewed by 23102
Abstract
Biodiversity is one of the most fundamental properties of Nature. It underpins the stability of ecosystems, provides vast bioresources for economic use, and has important cultural significance for many people. The Pampa biome, located in the southernmost state of Brazil, Rio Grande do [...] Read more.
Biodiversity is one of the most fundamental properties of Nature. It underpins the stability of ecosystems, provides vast bioresources for economic use, and has important cultural significance for many people. The Pampa biome, located in the southernmost state of Brazil, Rio Grande do Sul, illustrates the direct and indirect interdependence of humans and biodiversity. The Brazilian Pampa lies within the South Temperate Zone where grasslands scattered with shrubs and trees are the dominant vegetation. The soil, originating from sedimentary rocks, often has an extremely sandy texture that makes them fragile—highly prone to water and wind erosion. Human activities have converted or degraded many areas of this biome. In this review we discuss our state-of-the-art knowledge of the diversity and the major biological features of this regions and the cultural factors that have shaped it. Our aim is to contribute toward a better understanding of the current status of this special biome and to describe how the interaction between human activities and environment affects the region, highlighting the fragility of the Brazilian Pampa. Full article
(This article belongs to the Special Issue Biodiversity Feature Papers)
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272 KiB  
Review
Forecasting Extinctions: Uncertainties and Limitations
by Richard J. Ladle
Diversity 2009, 1(2), 133-150; https://doi.org/10.3390/d1020133 - 26 Nov 2009
Cited by 17 | Viewed by 10346
Abstract
Extinction forecasting is one of the most important and challenging areas of conservation biology. Overestimates of extinction rates or the extinction risk of a particular species instigate accusations of hype and overblown conservation rhetoric. Conversely, underestimates may result in limited resources being allocated [...] Read more.
Extinction forecasting is one of the most important and challenging areas of conservation biology. Overestimates of extinction rates or the extinction risk of a particular species instigate accusations of hype and overblown conservation rhetoric. Conversely, underestimates may result in limited resources being allocated to other species/habitats perceived as being at greater risk. In this paper I review extinction models and identify the key sources of uncertainty for each. All reviewed methods which claim to estimate extinction probabilities have severe limitations, independent of if they are based on ecological theory or on rather subjective expert judgments. Full article
(This article belongs to the Special Issue Biodiversity Feature Papers)
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