Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Coexistence; disturbance; intermediate; intermediate disturbance hypothesis; relative nonlinearity; storage effect (1)
- Conservation;genetics;Mollusca;population;Pyganodon;Unionidae (1)
- Courtship; diversity; Drosophila mojavensis ; flight; genetic variation; mating behaviour; receptivity; thermotolerance (1)
- Rio Grande; Pacific Decadal Oscillation; PDO; stream discharge; chloride concentration; hydrochemistry. (1)
- Walker Lake; oxygen isotopes; lake sediments; hydrologic variability; last millennium; Sierra Nevada. (1)
Articles 1 - 6 of 6
Full-Text Articles in Biology
A Comparison Of Behavioural Change In Drosophila During Exposure To Thermal Stress, Angel G. Fasolo, Robert A. Krebs
A Comparison Of Behavioural Change In Drosophila During Exposure To Thermal Stress, Angel G. Fasolo, Robert A. Krebs
Biological, Geological, and Environmental Faculty Publications
In order to understand how adaptive tolerance to stress has evolved, we compared related species and populations of Drosophila for a variety of fitness relevant traits while flies directly experienced the stress. Two main questions were addressed. First, how much variation exists in the frequency of both courtship and mating among D. melanogaster, D. simulans, and D. mojavensis when each are exposed to a range of temperatures? Second, how does variation in these same behaviours compare among four geographically isolated populations of D. mojavensis, a desert species with a well defined ecology? Our hierarchical study demonstrated that mating success under …
Combining Paternally And Maternally Inherited Mitochondrial Dna For Analysis Of Population Structure In Mussels, Robert A. Krebs
Combining Paternally And Maternally Inherited Mitochondrial Dna For Analysis Of Population Structure In Mussels, Robert A. Krebs
Biological, Geological, and Environmental Faculty Publications
Sequence divergence for a fragment of the 16S rRNA gene was compared to identify the advantages in using mitochondrial genes that descend separately through the female and male lineages to examine population structure. The test compared divergence among four local species of freshwater mussels (Unionidae) and was extended to multiple populations of one species, Pyganodon grandis. For the same gene, the male-inherited sequences diverged at a faster rate, producing longer branch lengths in the phylogenies. Of particular use were sequences extracted from P. grandis populations from the southern region of the Lake Erie watershed (Ohio, USA); five male-inherited haplotypes were …
Moving From Pattern To Process: Coexistence Mechanisms Under Intermediate Disturbance Regimes, Katriona Shea, Stephen H. Roxburgh, Emily Rauschert
Moving From Pattern To Process: Coexistence Mechanisms Under Intermediate Disturbance Regimes, Katriona Shea, Stephen H. Roxburgh, Emily Rauschert
Biological, Geological, and Environmental Faculty Publications
Coexistence mechanisms that require environmental variation to operate contribute importantly to the maintenance of biodiversity. One famous hypothesis of diversity maintenance under disturbance is the intermediate disturbance hypothesis (IDH). The IDH proposes patterns of peaked diversity under intermediate disturbance regimes, based on a tension between competitively superior species and species which can rapidly colonize following disturbance. We review the literature, and describe recent research that suggests that more than one underlying mechanism can generate this unimodal diversity pattern in disturbed environments. Several exciting emerging research areas are identified, including interactions between disturbance types, operation of the IDH in multi-trophic systems, …
A Plasmodium Gene Family Encoding Maurer’S Cleft Membrane Proteins: Structural Properties And Expression Profiling, Tobili Y. Sam-Yellowe, Laurence Florens, Jeffrey R. Johnson, Tongmin Wang, Judith A. Drazba, Karine G. Le Roch, Yingyao Zhou, Serge Batalov, Daniel J. Carucci
A Plasmodium Gene Family Encoding Maurer’S Cleft Membrane Proteins: Structural Properties And Expression Profiling, Tobili Y. Sam-Yellowe, Laurence Florens, Jeffrey R. Johnson, Tongmin Wang, Judith A. Drazba, Karine G. Le Roch, Yingyao Zhou, Serge Batalov, Daniel J. Carucci
Biological, Geological, and Environmental Faculty Publications
Upon invasion of the erythrocyte cell, the malaria parasite remodels its environment; in particular, it establishes a complex membrane network, which connects the parasitophorous vacuole to the host plasma membrane and is involved in protein transport and trafficking. We have identified a novel subtelomeric gene family in Plasmodium falciparum that encodes II transmembrane proteins localized to the Maurer's clefts. Using coimmunoprecipitation and shotgun proteomics, we were able to enrich specifically for these proteins and detect distinct peptides, allowing us to conclude that four to 10 products were present at a given time. Nearly all of the Pfmc-2tm genes are transcribed …
A 1200 Year Record Of Hydrologic Variability In The Sierra Nevada From Sediments In Walker Lake, Nevada, Fasong Yuan, Braddock K. Linsley, Steve P. Lund, John P. Mcgeehin
A 1200 Year Record Of Hydrologic Variability In The Sierra Nevada From Sediments In Walker Lake, Nevada, Fasong Yuan, Braddock K. Linsley, Steve P. Lund, John P. Mcgeehin
Biological, Geological, and Environmental Faculty Publications
Measurements of the oxygen isotopic composition (δ18O) of the total inorganic carbon (TIC) fraction from cored sediments of Walker Lake, Nevada, were conducted at an average resolution of ∼3 years per sample over the last 1200 years. On the basis of radiocarbon analysis on the total organic carbon (TOC) fraction, a δ18O time series was created to reconstruct changes in hydrologic conditions back to AD 800. The timings of variations in the TIC δ18O record are generally consistent with the tree ring-based Sacramento River flow record spanning AD 869 to 1977, indicating that Walker …
Influence Of The Pacific Decadal Oscillation On Hydrochemistry Of The Rio Grande, Usa, And Mexico, Fasong Yuan, Seiichi Miyamoto
Influence Of The Pacific Decadal Oscillation On Hydrochemistry Of The Rio Grande, Usa, And Mexico, Fasong Yuan, Seiichi Miyamoto
Biological, Geological, and Environmental Faculty Publications
The hydrochemistry has been examined using the major element composition of river water at 12 gauging stations along the Rio Grande. As the Rio Grande Basin consists of two watersheds that have different hydrologic and climatic regimes, two chloride concentration records from the El Paso and Falcon Dam gauging stations have been extracted to reflect long-term variability in river chemistry of the upper and lower basins over the last 50–70 years. Both records contain decadal variability in chloride concentration but are different in nature. The chloride concentration record from the upper basin displays a distinct pattern of decadal variability similar …