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54 results for “Hystrix”
Santa Rita Experimental Range site, station Pasture 8 at Santa Rita Experimental Range, study of plant density of Sitanion hystrix in units of numberPerMeterSquared on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Santa Rita Experimental Range (SRE) contains plant density of Sitanion hystrix measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.
Santa Rita Experimental Range site, station Santa Rita Experimental Range control treatment: pastures 8 and 22, study of plant cover of Sitanion hystrix in units of percent on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Santa Rita Experimental Range (SRE) contains plant cover of Sitanion hystrix measurements in percent units and were aggregated to a yearly timescale.
Santa Rita Experimental Range site, station Santa Rita Experimental Range control treatment: pastures 8 and 22, study of plant density of Sitanion hystrix in units of numberPerMeterSquared on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Santa Rita Experimental Range (SRE) contains plant density of Sitanion hystrix measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.
Santa Rita Experimental Range site, station Santa Rita Experimental Range pastures that were grazed and burned: pastures 2N and 6A, study of plant cover of Sitanion hystrix in units of percent on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Santa Rita Experimental Range (SRE) contains plant cover of Sitanion hystrix measurements in percent units and were aggregated to a yearly timescale.
Santa Rita Experimental Range site, station Santa Rita Experimental Range pastures that were grazed and burned: pastures 2N and 6A, study of plant density of Sitanion hystrix in units of numberPerMeterSquared on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Santa Rita Experimental Range (SRE) contains plant density of Sitanion hystrix measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.
Santa Rita Experimental Range site, station Santa Rita Experimental Range pastures where the mesquite were killed and the pastures were burned: pasture 2S, study of plant cover of Sitanion hystrix in units of percent on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Santa Rita Experimental Range (SRE) contains plant cover of Sitanion hystrix measurements in percent units and were aggregated to a yearly timescale.
Microsatellite genotypes and ITS2 DNA sequence data for Seriatopora hystrix
<p>Coral reefs provide essential goods and services but are degrading at an alarming rate due to local and global anthropogenic stressors. The main limitation that prevents the implementation of adequate conservation measures is that connectivity and genetic structure of populations are poorly known. Here, the genetic diversity and connectivity of the brooding scleractinian coral, <i>Seriatopora hystrix</i> were assessed at two scales by genotyping ten microsatellite markers for 356 individual colonies. Seriatopora hystrix showed high differentiation, both at large scale between the Red Sea and the Western Indian Ocean (WIO), and at smaller scale along the coast of East Africa.As such high levels of differentiation might indicate the presence of more than one species, a haploweb analysis was conducted with the nuclear marker ITS2, confirming that the Red Sea populations are genetically distinct from the WIO ones.Based on microsatellite analyses three groups could be distinguished within the WIO: (I) north Madagascar, (II) south-west Madagascar together with one site in northern Mozambique (Nacala), and (III) all other sites in northern Mozambique, Tanzania and Kenya. These patterns of restricted connectivity could be explained by the short pelagic larval duration of <i>S. hystrix,</i> and/or by oceanographic factors, such as eddies in the Mozambique Channel (causing larval retention in northern Madagascar but facilitating dispersal from northern Mozambique towards south-west Madagascar). This study provides an additional line of evidence supporting the conservation priority status of the Northern Mozambique Channel and should inform coral reef management decisions in the region.</p> <p> </p>
FIGURE 6 in Redescription of Acanthicus hystrix Agassiz, 1829 (Siluriformes: Loricariidae), with comments on the systematics and distribution of the genus
FIGURE 6. Distribution of the genus Acanthicus: A. hystrix (red circles) and A. adonis (black triangle; white triangle represents the holotype).
FIGURE 4 in Redescription of Acanthicus hystrix Agassiz, 1829 (Siluriformes: Loricariidae), with comments on the systematics and distribution of the genus
FIGURE 4. Live specimen of Acanthicus hystrix from rio Xingu, MZUSP 107203, 81.5 mm SL. Photograph by Osvaldo Oyakawa.
FIGURE 3 in Redescription of Acanthicus hystrix Agassiz, 1829 (Siluriformes: Loricariidae), with comments on the systematics and distribution of the genus
FIGURE 3. Dorsal and ventral view of the cranium in Megalancistrus parananus, MZUSP 4434, 249.9 mm CP.
FIGURE 1 in Redescription of Acanthicus hystrix Agassiz, 1829 (Siluriformes: Loricariidae), with comments on the systematics and distribution of the genus
FIGURE 1. Illustration of Acanthicus hystrix from the original description by Agassiz in Spix and Agassiz, 1829.
FIGURE 7 in Redescription of Acanthicus hystrix Agassiz, 1829 (Siluriformes: Loricariidae), with comments on the systematics and distribution of the genus
FIGURE 7. Results of principal components analysis (PCA) of subpopulations of Acanthicus hystrix. Black circle: Amazon (rio Purus); cross: Amazon (rio Solimões); square: rio Tocantins; asterisk: Roraima (rios Branco and Takutu); diamond: rio Xingu and triangle: Venezuela (rio Orinoco). Most strongly weighted characters show along axes.
On following pages: 3. Asiatic Brush-tailed Porcupine (Atherurus macrourus); 4. Sumatran Porcupine (Hystrix sumatrae); 5. Thick-spined Porcupine (Hystrix crassispinis); 6. Philippine Porcupine (Hystrix pumila); 7. Malayan Porcupine (Hystrix brachyura); 8. Sunda Porcupine (Hystrix javanica); 9. Crested Porcupine (Hystrix cristata); 10. Cape Porcupine (Hystrix africaeaustralis); 11. Indian Crested Porcupine (Hystrix indica). in Hystricidae
On following pages: 3. Asiatic Brush-tailed Porcupine (Atherurus macrourus); 4. Sumatran Porcupine (Hystrix sumatrae); 5. Thick-spined Porcupine (Hystrix crassispinis); 6. Philippine Porcupine (Hystrix pumila); 7. Malayan Porcupine (Hystrix brachyura); 8. Sunda Porcupine (Hystrix javanica); 9. Crested Porcupine (Hystrix cristata); 10. Cape Porcupine (Hystrix africaeaustralis); 11. Indian Crested Porcupine (Hystrix indica).
FIGURE 43. Live individuals. A. Lichenodraculus matti. B. Markia arizae. C. M. major. D. M. hystrix. E. Apolinaria hygracantha. F. Paraphidnia brevicristata G in The tribe Dysoniini part VI: Phylogeny, biogeography and evolutionary trends of the lichen katydid genera (Orthoptera: Tettigoniidae: Phaneropterinae). Eleventh contribution to the suprageneric organization of Neotropical phaneropterines
FIGURE 43. Live individuals. A. Lichenodraculus matti. B. Markia arizae. C. M. major. D. M. hystrix. E. Apolinaria hygracantha. F. Paraphidnia brevicristata G. Anaphidna rubricorpus. (Photos: A. L. Salagaje. B. A. Kay. C. J. Monzón. E. F. Arango. F. A. Anker. G. J. Cardona).
FIGURE 177. Diodon hystrix Linnaeus 1758 in Checklist of the marine and estuarine fishes of New Ireland Province, Papua New Guinea, western Pacific Ocean, with 810 new records
FIGURE 177. Diodon hystrix Linnaeus 1758, Lissenung Island, Kavieng District, 16 Aug. 2009 (underwater photograph: Dietmar Amon).
FIGURE 5. Stenocephalum hystrix. A. Plant. B. Capitula. C. Outer phyllary. D. Middle phyllary. E. Inner phyllary. F. Cypsela. G in Taxonomic revision of the genus Stenocephalum (Vernonieae, Asteraceae)
FIGURE 5. Stenocephalum hystrix. A. Plant. B. Capitula. C. Outer phyllary. D. Middle phyllary. E. Inner phyllary. F. Cypsela. G. Floret.
Data from: Long live the alien: is high genetic diversity a pivotal aspect of crested porcupine (Hystrix cristata) long-lasting and successful invasion?
Studying the evolutionary dynamics of an alien species surviving and continuing to expand after several generations can provide fundamental information on the relevant features of clearly successful invasions. Here, we tackle this task by investigating the dynamics of the genetic diversity in invasive crested porcupine (Hystrix cristata) populations, introduced to Italy about 1500 years ago, which are still growing in size, distribution range and ecological niche. Using genome-wide RAD markers, we describe the structure of the genetic diversity and the demographic dynamics of the H. cristata invasive populations and compare their genetic diversity with that of native African populations of both H. cristata and its sister species, H. africaeaustralis. First, we demonstrate that genetic diversity is lower in both the invasive Italian and the North Africa source range relative to other native populations from sub-Saharan and South Africa. Second, we find evidence of multiple introduction events in the invasive range followed by very limited gene flow. Through coalescence-based demographic reconstructions, we also show that the bottleneck at introduction was mild and did not affect the introduced genetic diversity. Finally, we reveal that the current spatial expansion at the northern boundary of the range is following a leading-edge model characterized by a general reduction of genetic diversity towards the edge of the expanding range. We conclude that the level of genome-wide diversity of H. cristata invasive populations is less important in explaining its successful invasion than species-specific life-history traits or the phylogeographic history in the native source range.
FIGURE 3 in Subspecific taxonomy of African porcupines Hystrix spp.: is there anything beyond the species level?
FIGURE 3. Maximum-likelihood trees on mtDNA sequences of (a) cytochrome-b and (b) D-loop of Hystrix cristata and Hystrix africaeaustralis (from Trucchi & Sbordoni 2009). Numbers at main nodes indicate bootstrap values. (c) Maximumlikelihood tree of genome-wide RAD nuclear markers (taken from Trucchi et al. 2016, readapted). Available bootstrap values are shown. Red colour refers to H. cristata, grey to H. africaeaustralis; a sequence of H. indica was included as outgroup for mtDNA trees.
FIGURE 1 in Subspecific taxonomy of African porcupines Hystrix spp.: is there anything beyond the species level?
FIGURE 1. Distribution of the subgenus Hystrix: 1, Hystrix cristata; 2, Hystrix indica; 3, Hystrix africaeaustralis (map based on Mori et al. 2019 and IUCN data, updated with further publications: Altorabi 2018; Vale et al. 2016; Bauer et al. 2018). Published distribution data were also integrated with occurrences uploaded on online platforms, i.e., iNaturalist (data checked on 08.03.2021). Dotted areas indicate areas where no record of H. cristata after 2000 is available, question marks indicate nonsampled areas after 2000.
FIGURE 2 in Subspecific taxonomy of African porcupines Hystrix spp.: is there anything beyond the species level?
FIGURE 2. Presumed distribution of the subspecies of African Hystrix porcupines according to Mohr (1965).
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