Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 53 for “"endemics"”.
-
The Detection of Morphological Variation across Time in Two Roan Mountain Endemics: <em>Geum radiatum</em> and <em>Houstonia montana</em>.
<p>Morphological variation between geographically distant populations has long been recognized. The primary objective of this study was to test whether nonrandom shifts in morphology have occurred across a 150-year time span in two rare, endangered plant species <em>Geum radiatum</em> and …
-
Análise da composição e da distribuição geográfica da avifauna das restingas do Estado do Rio de Janeiro
… distribution (85,31 %), Atlantic Forest endemics (14%) and study area endemics (0,69%). The dominance of widely distributed elements, those found at more than two morphoclimatic domains, shows that the studied avifauna is composed by generalists species, which use a great variety of …
-
Systematic revision of the South American armored catfish genus Loricaria (Siluriformes: Loricariidae)
… in the Amazon basin (13 species, including 10 endemics), followed by the Paraguay region (5 species, including 4 endemics), Guianas region (5 species, including 2 endemics), Orinoco basin (3 species, including 2 endemics), and a single species occurring in both the São Francisco basin and …
-
ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΟΥ ΕΝΔΗΜΙΣΜΟΥ ΤΗΣ ΧΛΩΡΙΔΑΣ ΤΗΣ ΠΕΛΟΠΟΝΝΗΣΟΥ
… ON PELOPONNESOS, AS WELL AS THE EXCLUSIVELY ENDEMICS ON PELOPONESSOS IS GIVEN. THE CRITICAL ENDEMIC TAXA HELPING INBETTER UNDERSTANDING OF THE PROBLEM, ON OUR OPINION, ARE EXAMINED. THEIR DESCRIPTION-CYTOLOGY-ECOLOGY-STATUS AND THEIR STRATEGY OF EXPANSION, AS WELL AS THE RELATIONS TO THEIR …
-
Biogeography and conservation of terrestrial afrotropical birds
… restricted to sub-Saharan Africa (Afrotropical endemics) revealed a suite of geographical areas that have a homogenous and characteristic avifaunal composition, termed avifaunal zones. The approach used in this study ensured representativeness in the resultant biogeographical classification …
-
The importance of hydrologic refugia for the diversity of the Cape Flora
… of widespread species (WS), narrow-range endemics (NREs), and wetland dependent narrow-range endemics (WD-NREs) and explore the environmental correlates of these distributions. I make use of Quarter degree square grid cells as a measuring unit, which are larger (~20 km across), than the …
-
Hotspots, Extinction Risk and Conservation Priorities of Greater Caribbean and Gulf of Mexico Marine Bony Shorefishes
… process indicate that hotspots of limited range endemics, which are species that may be more susceptible to extinction, are located in Venezuela, Belize and the northeastern Gulf of Mexico. Nearly a quarter of the Gulf endemics are threatened. The regional threat level for Gulf non-endemics is …
-
Systematics and biodiversity of South African sea urchins
… the regional echinoid fauna comprises 26.8 % endemics, 1.4 % introduced, and 71.8 % non-endemics; across 14 orders and 29 families. As expected, species richness pattern increased from west to east coast. However , the east coast displayed the lowest number of records; as compared to the South …
-
The Vascular Flora of Lost Valley, Newton County, Arkansas
… are described which contain a number of endemics, disjuncts and relic species. The occurrence of the flora within this unique area is discussed in relation to the topography, geology, climate, soils, and past vegetational history.
-
Biosystematics and Diversification in the Genus <i>Striga Lour.</i> (Scrophulariaceae) in Africa
… zone has 74% of the taxa including 41% endemics. Within this region, the West African part (from Senegal to eastern Nigeria) has 62% of the total taxa including 24% endemics. South of the equator the number of taxa is 56% of the total with 21% endemics, a proportion slightly less than …
-
A study of endemic syphilis in Palestine
… of the history of syphilis is given. Classical endemics in Scotland, Norway and Sweden, Bosnia and Herzegovina, Russia and other countries are described. The scarcity of primary manifestations and apparent rarity of sequelae on the one hand and the preponderance of mucous membrane and skin …
-
The phylogenetics, taxonomy and biogeography of African arid zone terrestrial birds : the bustards (Otididae), sandgrouse (Pteroclidae), coursers (Glareolidae) and Stone Partridge (Ptilopachus)
… terrestrial non-passerine birds, that have endemics in both the south-west and north-east arid-zone lowlands (and Sahel), and which also encompass taxa with differing habitat tolerances, mobility and life-history traits, were examined: the bustards (Otididae), sandgrouse (Pteroclidae), …
-
Flora of the Cape Peninsula : endemism, threatened plants and conservation in perspective
… only of species. Of the 2285 in the flora 90 are endemics and 141 are threatened. The Bykov's level of endemism at 1 for the Peninsula was high in global terms. Endemic and threatened taxa were found not to be a random assemblage taxonomically, with and Proteaceae overrepresented in terms of …
-
Competitive Effects Of Increased Plant Species Richness And Increased Endemic Versus Native Generalist Species Dominance On The Invasive Grass Microstegium Vimineum During Oak Woodland Restoration
… species of greater conservation interest (i.e. endemics) and widespread generalist species may compete differentially with non-native invasive species. To test whether plant species richness or species fidelity to a regionally rare habitat were more important in competitively suppressing an …
-
The Vascular Flora of Roaring River State Park, Barry County, Missouri
… Forest Region and contain a number of endemics, disjuncts, and floristic affinities to other geographic areas. Some rare and endangered species also occur here. The occurrence of the flora within this area of southwestern Missouri is discussed in relation to the climate, topography, …
-
An assessment of the distribution and conservation status of endemic and near endemic plant species in Maputaland
… transformation over time. As a result, 13 endemics were assessed, 11 of these species for the first time. Of the 13 species assessed, two were assessed as Least Concern, five as Vulnerable, four Endangered, one Critically Endangered, and one possibly Extinct. MaxEnt models were used to …
-
The vascular flora of the Lula Lake land trust on Lookout Mountain in Walker County, Georgia and a biogeographical analysis of the Coastal Plain element on the Cumberland Plateau
… significantly higher proportion of Coastal Plain endemics in the Cumberland Plateau than surrounding physiographic provinces.
-
Decline of the Savannah River Redeye Bass (Micropterus Coosae) Due to Introgressive Hybridization With Invasive Alabama Spotted Bass (Micropterus Punctulatus Henshalli)
… hybridization can be just as detrimental to endemics as predation and competition, especially in species that have limited reproductive barriers, i.e. icthyofuana. Here hybridization is examined between two introduced species (Alabama spotted bass, Micropterus punctulatus henshalli, and …
-
Modeling avifauna responses to miombo woodland degradation in Serenje district, Central province, Zambia
… with old growth miombo were miombo woodland endemics while 40% of the bird species correlated with degraded old growth miombo were miombo endemics. The percentage of miombo endemics correlated with old regrowth miombo was 11.1% while young regrowth miombo was not correlated with any endemic …
-
Modeling avifauna responses to miombo woodland degradation in Serenje district, Central province, Zambia
… with old growth miombo were miombo woodland endemics while 40% of the bird species correlated with degraded old growth miombo were miombo endemics. The percentage of miombo endemics correlated with old regrowth miombo was 11.1% while young regrowth miombo was not correlated with any endemic …
Page 1 of 3