Search results for "diversity"
showing 10 items of 3950 documents
Typification of two Linnaean names: Centaurea aspera and Centaurea isnardii (Asteraceae)
2014
The typification of the names Centaurea aspera L. and C. isnardii L. (Asteraceae) is discussed. A lectotype for C. aspera is designated from original material conserved in UPS-BURSER (Joachim Burser Herbarium). Centaurea isnardii is typified by an illustration of Isnard (1719) confirming this name as a synonym of C. aspera subsp. aspera.
Tipificación de Inula montana L. (Asteraceae)
2014
Ferrer-Gallego, P., E. Laguna, R. Rosello, J. Gomez & J. B. Peris (2014). Typification of Inula montana L. (Asteraceae). Candollea 69: 5–8. In Spanish, English and French abstracts.The name Inula montana L. (Asteraceae) is lecto- and epitypified. The designated lectotype corresponds to an icon from Robert Morison published in 1699 and the epitype to a plant specimen collected by Morison and conserved at OXF (Morisonian Herbarium).
<strong>Contributions to the Opiinae (Hymenoptera: Braconidae) of Eastern Iran with updated checklist of Iranian species</strong>
2014
The present work collects the checklist of species of Opiinae (Hymenoptera: Braconidae) from Iran and presents new information about the specimens captured in the Sistan and Baluchestan province during 2009–2011. A total of 68 species belonging to eight genera have been listed, of which nine species including Opius ( Hypocynodus ) arundinis Fischer, 1964a; Opius ( Hypocynodus ) bouceki (Fischer, 1958b); Opius ( Opius ) caricivorae Fischer, 1964b; Opius ( Opius ) exilis Haliday, 1837; Opius ( Opiothorax ) opacus Fischer, 1968; Opius ( Allophlebus ) tabificus Papp, 1979; Phaedrotoma biroica (Fischer et Beyarslan 2005a); Phaedrotoma mirabunda (Papp, 1982) and Xynobius rudis (Wesmaelm, 1835) ar…
Species diversity of the deep-water gulper sharks (Squaliformes: Centrophoridae:Centrophorus) in North Atlantic waters - current status and taxonomic…
2014
The gulper sharks (genus Centrophorus) are a group of deep-water benthopelagic sharks with a worldwide dis- tribution. The alpha taxonomy of the group has historically been problematic and the number of species included in the genus has varied considerably over the years and is still under debate. Gulper sharks are routinely caught in mid- and deep-water fisheries worldwide and some have shown a considerable decline in abundance in the last few decades. Clear and consistent species discrimination of Centrophorus is essential for an efficient and sustain- able management of these fisheries resources. Our study used molecular cytochrome oxidase subunit I (COI) and 16S ribosomal RNA gene seque…
Increase of rotifer diversity after sewage diversion in the hypertrophic lagoon, Albufera of Valencia, Spain
2001
The Albufera of Valencia is a large oligohaline hypertrophic lagoon, regulated by sluice gates according to the needs of the surrounding rice field cultivation. It is in a turbid state with permanent cyanobacterial blooms. A slight improvement was detected after diversion in the 1990s of part of the sewage flowing into it. After sewage diversion, we found that: (1) Chlorophyll concentration and rotifer densities decreased; (2) Rotifer proportions declined, due mainly to a relative increase in cladocerans; (3) Rotifer diversity increased. The two dominants of the 1980s, Polyarthra spp. in the colder period and Brachionus angularis in the warmer one, reverted after sewage diversion to a more …
The Difference in Verbal aggressiveness Between the United States and Thailand
2013
This study analyzes the verbal aggressiveness of Americans (n = 592) and Thais (n = 232). Specifically, the analysis of this convenience sample revealed that Thais are more verbally aggressive than Americans. Cultural differences between the 2 nations are discussed as explanations for differences between the 2 nations in verbal aggressiveness.
Palaeoclimatic applications of large databases: developing and testing methods of palaeotemperature reconstruction using nonmarine ostracods
2008
Non-analogue methods for Quaternary palaeoclimatic reconstruction, such as the coleopteran Mutual Climate Range method and the Mutual Ostracod Temperature Range (MOTR) method, use large geographical databases combined with modern climate datasets to establish the modern climate/temperature ranges of species, which can then be applied to the interpretation of fossil assemblages. Such approaches have been criticized for their lack of attention to variation in the distributions of species within their climate ranges. The MOTR method, for example, assumes that a species has an equal probability of occurring anywhere within its temperature range (e.g. mean July air temperature range), but tests …
New insights into the diversity dynamics of Triassic conodonts
2013
International audience; In this paper, we examine the diversity trends and the evolutionary patterns of Triassic conodonts through a newly powered large-scale data-set compiled directly from the primary literature. Paleodiversity dynamics analyses have been undertaken by working at the species level and using a system of time units based on biozone subdivisions for a fine temporal level resolution. The role of heterogeneous duration of taxa in diversity estimates has been evaluated through the probabilistic profiles. Results reveal three different stages in the diversity behaviour of Triassic conodonts from standing metrics delimited by two inflections at the mid-Anisian and mid-Carnian. Su…
Helminth Communities in Audouin's Gulls, Larus audouinii from Chafarinas Islands (Western Mediterranean)
1999
A survey of intestinal helminth communities of Audouin's s gulls Larus audouinii, from their breeding colonies in Chafarinas Islands, western Mediterranean, Spain was conducted to determine the abundance and species diversity of intestinal parasites of these birds. The sample of 58 gulls harbored intestinal helminth infracommunities composed of species that are gull generalists, including the digeneans Cardiocephalus longicollis, Knipowitschiatrema nicolai, Condylocotyla pilodora, and Aporchis massiliensis, and the cestode Tetrabothrius cylindraceus. Two nematodes are waterfowl generalists (Cosmocephalus obvelatus and Paracuaria adunca), whereas the digenean Acanthotrema armata is an Audoui…
Certhia tianquanensis Li, a treecreeper with relict distribution in Sichuan, China
2002
Certhia tianquanensis Li, 1995, is characterised as a distinct species and is combined withC. discolor in the superspeciesC. [discolor]. This probably relict species occupies an extremely small range, and has so far been found at only four sites in western Sichuan, China. It is characterised by a long tail (likeC. discolor), an extremely short bill (similar toC. nipalensis), the patterning on the underside, with white chin and throat and beige chest and abdomen (likeC. himalayana), a striking voice (clearly different fromC. discolor and all otherCerthia species), and a large genetic distance fromC. d. discolor in the cytochrome-b gene. Unlike its closest relativeC. discolor, C. tianquanensi…