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- Avian assemblages; arid zones; species richness; community composition; bird abundance; bird-habitat relationships; comparative phylogeography; Venezuela; conservation biology; genetic diversity; arid scrub (1)
- Bird communities (1)
- Clusiaceae (1)
- Coordinated display (1)
- Development (1)
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- Floral evolution (1)
- Galapagos (1)
- Garcinia (1)
- Gene regulation (1)
- Genetic drift (1)
- Grasslands (1)
- Ho1 (1)
- Hypnales (1)
- Island (1)
- Lepidothrix coronata; blue-crowned manakin; Pipridae; Ecuador; Amazonia; lekking; female mate choice; spatial patterns; hotspot hypothesis; male turnover; male tenure; genetic benefits; male quality; display rate; heterozygosity; lek structure; paternity analysis (1)
- MRNA (1)
- Major histocompatibility complex (1)
- Malpighiales (1)
- Manakins (1)
- Molecular phylogeny (1)
- Nad4-5 (1)
- Nad5 (1)
- Natural selection (1)
- Nest survival (1)
- Northern Campos (1)
- Nuclear export (1)
- Pampas (1)
- Papillae (1)
- Phylogeny (1)
- Pipra filicauda (1)
- Publication Type
Articles 1 - 17 of 17
Full-Text Articles in Life Sciences
Causes Of Mortality Of Wild Birds Submitted To The Charles Darwin Research Station, Santa Cruz, Galápagos, Ecuador From 2002-2004, Patricia Parker, Nicole Gottdenker, Timothy Walsh, Gustavo Jiménez-Uzcátegui, Franklin Betancourt, Marilyn Cruz, Catherine Soos, R. Miller
Causes Of Mortality Of Wild Birds Submitted To The Charles Darwin Research Station, Santa Cruz, Galápagos, Ecuador From 2002-2004, Patricia Parker, Nicole Gottdenker, Timothy Walsh, Gustavo Jiménez-Uzcátegui, Franklin Betancourt, Marilyn Cruz, Catherine Soos, R. Miller
Biology Department Faculty Works
Necropsy findings were reviewed from wild birds submitted to the Charles Darwin Research Station, Santa Cruz Island, Galápagos Archipelago between 2004 and 2006. One hundred and ninety cases from 27 different species were submitted, and 178 of these cases were evaluated grossly or histologically. Trauma and trauma-related deaths (n=141) dominated necropsy submissions. Infectious causes of avian mortality included myiasis due to Philornis sp. (n=6), avian pox (n=1), and schistosomosis (n=1).
Systematics And Floral Evolution In The Plant Genus Garcinia (Clusiaceae), Patrick Wayne Sweeney
Systematics And Floral Evolution In The Plant Genus Garcinia (Clusiaceae), Patrick Wayne Sweeney
Dissertations
The pantropical genus Garcinia (Clusiaceae), a group comprised of more than 250 species of dioecious, trees and shrubs, is a common component of lowland tropical forests and is best known by the highly prized fruit of mangosteen (G. mangostana). The genus exhibits as extreme diversity of floral form as is found anywhere in angiosperms and there are many unresolved taxonomic issues surrounding the genus. To understand patterns of floral evolution within the group and to evaluate morphology-based classification schemes involving Garcinia and its relatives, relationships among a broad sample of Garcinia and close relatives were inferred by conducting Bayesian, parsimony, …
Community Ecology And Phylogeography Of Bird Assemblages In Arid Zones Of Northern Venezuela: Implications For The Conservation Of Restricted-Range Birds, Adriana Rodriguez-Ferraro
Community Ecology And Phylogeography Of Bird Assemblages In Arid Zones Of Northern Venezuela: Implications For The Conservation Of Restricted-Range Birds, Adriana Rodriguez-Ferraro
Dissertations
Aridlands of northern Venezuela are important from an ornithological perspective because of the occurrence of habitat specialist birds that depend exclusively on desert scrubs and are endemic to this region. Currently, long-term survival of habitat specialists is threatened by ongoing changes in vegetation but the effects of such changes on bird assemblages are unknown. The goal of this study was to characterize bird assemblages found in six arid zones in northern Venezuela at both ecological and genetic levels, and to generate information relevant for conservation planning. The study involved assessments of patterns of avian species richness, abundance, community composition and …
Spatial And Temporal Dynamics Of Lekking Behavior And Female Mate Choice In The Blue-Crowned Manakin (Lepidothrix Coronata, Aves: Pipridae), Renata Duraes Ribeiro
Spatial And Temporal Dynamics Of Lekking Behavior And Female Mate Choice In The Blue-Crowned Manakin (Lepidothrix Coronata, Aves: Pipridae), Renata Duraes Ribeiro
Dissertations
In lekking species, males aggregate at display grounds (?leks?) that females visit to copulate. Lekking systems are non-resource-based and males vary widely in reproductive output. This dissertation investigates how spatial and temporal factors influence lekking dynamics and female mate choice in the blue-crowned manakin Lepidothrix coronata. The first chapter deals with spatial dynamics of lekking behavior, and investigates whether leks are formed by the establishment of males on sites of high female density (?hotspot hypothesis?). Predictive maps of female spatial distribution were built based on field data and contrasted to the lek distribution. Leks were located in sites where males …
Grassland Birds In Natural And Cultivated Grasslands In The Northern Campos Of Uruguay: Diversity Patterns, Responses To Vegetation Structure, And Nest Survival, Adrian Bruno Azpiroz
Grassland Birds In Natural And Cultivated Grasslands In The Northern Campos Of Uruguay: Diversity Patterns, Responses To Vegetation Structure, And Nest Survival, Adrian Bruno Azpiroz
Dissertations
Grassland bird populations are declining in many regions of the world as a consequence of habitat modification but research efforts have been concentrated in North America and Europe. In the Neotropics, however, many aspects of grassland bird ecology remain virtually unexplored. The objective of this study was to examine the effects of habitat modification on the distribution, abundance, and reproductive success of grassland birds in the Northern Campos of Uruguay. The study focused on birds that inhabit four grassland habitats which differed in terms of agricultural management in the Northern Campos of Uruguay. First, distance sampling was used to characterize …
A Developmental, Phylogenetic And Taxonomic Study On The Moss Genus Taxithelium Mitt. (Pylaisiadelphaceae), Paulo Saraiva Camara
A Developmental, Phylogenetic And Taxonomic Study On The Moss Genus Taxithelium Mitt. (Pylaisiadelphaceae), Paulo Saraiva Camara
Dissertations
The family Sematophyllaceae is probably the most diverse Hypnales in the tropics and one of the most complex and taxonomically confused. This thesis comprises three parts: 1, a micromorphological study of papilla development in Taxithelium and relatives; 2, a phylogenetic study of Taxithelium; and 3, a revision of Taxithelium subgenus Vernieri. 1. I present data on the structure and development of leaf cell papillae in different Sematophyllaceae. Two kinds of papillae are recognized. One is dome-shaped to conical tapering to a firmly rounded apex (?conical?), whereas the other presents a more flaccid, baggy appearance, and is often flat-topped and wider …
Population Genetics Of Island Endemics: Neutral And Major Histocompatibility Loci, Jennifer Lynn Bollmer
Population Genetics Of Island Endemics: Neutral And Major Histocompatibility Loci, Jennifer Lynn Bollmer
Dissertations
Island archipelagoes are ideal for the study of microevolutionary forces due to their multiple, closely related but geographically disjunct populations. I used both neutral and major histocompatibility complex (MHC) loci to determine the population genetic structures of bird species endemic to the Galapagos Islands. MHC molecules recognize foreign pathogens in the body, and these loci are known for their high degree of genetic variability maintained by natural selection. Small island populations are predicted to have reduced genetic variability due to the effects of genetic drift; however, selection may be strong enough to prevent the loss of variability at MHC loci. …
Computational Design Of Orthogonal Ribosomes, Lon Chubiz, Christopher Rao
Computational Design Of Orthogonal Ribosomes, Lon Chubiz, Christopher Rao
Biology Department Faculty Works
Orthogonal ribosomes (o-ribosomes), also known as specialized ribosomes, are able to selectively translate mRNA not recognized by host ribosomes. As a result, they are powerful tools for investigating translational regulation and probing ribosome structure. To date, efforts directed towards engineering o-ribosomes have involved random mutagenesisbased approaches. As an alternative, we present here a computational method for rationally designing o-ribosomes in bacteria. Working under the assumption that base-pair interactions between the 16S rRNA and mRNA serve as the primary mode for ribosome binding and translational initiation, the algorithm enumerates all possible extended recognition sequences for 16S rRNA and then chooses those …
Reproductive And Social Dynamics Of A Lek Breeding Bird, Thomas Brandt Ryder
Reproductive And Social Dynamics Of A Lek Breeding Bird, Thomas Brandt Ryder
Dissertations
Sociality and the unequal apportionment of reproductive success among social individuals is a common characteristic of many vertebrate taxa. To date, our understanding of what factors drive high variance in reproductive success (i.e., intra vs. inter-sexual selection) and which male attributes contribute to that variance, are still fragmentary for most species. Moreover, how social structure interacts with individual behavior and fitness remains understudied despite its potential importance to the evolution of cooperation. This dissertation research focused on understanding this complex synergistic interplay between social and reproductive dynamics in a lek-breeding bird, the wire-tailed manakin. The first chapter examines the complex …
An Analysis Of Mer1 Function During Meiotic Splicing Regulation In Saccharomyces Cerevisiae, Frederick William Scherrer
An Analysis Of Mer1 Function During Meiotic Splicing Regulation In Saccharomyces Cerevisiae, Frederick William Scherrer
Dissertations
The transition from mitosis to meiosis in the yeast Saccharomyces cerevisiae requires a significant change to gene expression profiles. Regulation of pre-messenger RNA splicing patterns during meiosis assists in this transition by fine tuning expression of essential meiotic genes. Produced only during meiosis, Mer1p is linked to the splicing of at least three mRNAs: MER2, MER3, and AMA1. Previous evidence suggests that Mer1p activates splicing by directly recruiting snRNPs or stabilizing intermediate splicing complexes formed on pre-mRNA that contains an intronic Mer1p enhancer element. However, some splicing factors, especially accessory/non-snRNP factors, have critical roles in retaining unspliced pre-mRNAs in the …
Heritability Of Longevity In Captive Populations Of Nondomesticated Mammals And Birds, Robert Ricklefs, Carlos Cadena
Heritability Of Longevity In Captive Populations Of Nondomesticated Mammals And Birds, Robert Ricklefs, Carlos Cadena
Biology Department Faculty Works
We used variance components analysis and offspring–parent regression to estimate the heritability of age at death in zoo populations of several species of mammals and birds. A meta-analysis over 14 species of mammals indicated a variance–component heritability of 0.53. More conservative regression estimates of heritability for the same species averaged 0.17. Offspring–parent regressions were not significant for any of eight species of birds. Heritabilities for data simulated with frailty and age-at-death models showed that sources of variation in age at death cannot be distinguished from observed heritabilities. The CVA in age at death in six mammal species, based on parent–offspring …
Phospholipase Dα3 Is Involved In The Hyperosmotic Response In Arabidopsis, Xuemin Wang, Yueyun Hong, Xiangqing Pan, Ruth Welti
Phospholipase Dα3 Is Involved In The Hyperosmotic Response In Arabidopsis, Xuemin Wang, Yueyun Hong, Xiangqing Pan, Ruth Welti
Biology Department Faculty Works
Rapid activation of phospholipase D (PLD), which hydrolyzes membrane lipids to generate phosphatidic acid (PA), occurs under various hyperosmotic conditions, including salinity and water deficiency. The Arabidopsis thaliana PLD family has 12 members, and the function of PLD activation in hyperosmotic stress responses has remained elusive. Here, we show that knockout (KO) and overexpression (OE) of previously uncharacterized PLDα3 alter plant response to salinity and water deficit. PLDα3 uses multiple phospholipids as substrates with distinguishable preferences, and alterations of PLDα3 result in changes in PA level and membrane lipid composition. PLDα3-KO plants display increased sensitivities to salinity and water deficiency …
First Male Sperm Precedence In Multiply-Mated Females Of The Cooperative Spider Anelosimus Studiosus (Araneae, Theridiidae), Thomas Jones, Patricia Parker
First Male Sperm Precedence In Multiply-Mated Females Of The Cooperative Spider Anelosimus Studiosus (Araneae, Theridiidae), Thomas Jones, Patricia Parker
Biology Department Faculty Works
No abstract provided.
Differential Degradation Of Extraplastidic And Plastidic Lipids During Freezing And Post-Freezing Recovery In Arabidopsis Thaliana, Xuemin Wang, Weiqi Li, Ruiping Wang, Maoyin Li, Lixia Li, Chuanming Wang, Ruth Welti
Differential Degradation Of Extraplastidic And Plastidic Lipids During Freezing And Post-Freezing Recovery In Arabidopsis Thaliana, Xuemin Wang, Weiqi Li, Ruiping Wang, Maoyin Li, Lixia Li, Chuanming Wang, Ruth Welti
Biology Department Faculty Works
Changes in membrane lipid composition play important roles in plant adaptation to and survival after freezing. Plant response to cold and freezing involves three distinct phases: cold acclimation, freezing, and post-freezing recovery. Considerable progress has been made toward understanding lipid changes during cold acclimation and freezing, but little is known about lipid alteration during post-freezing recovery. We previously showed that phospholipase D (PLD) is involved in lipid hydrolysis and Arabidopsis thaliana freezing tolerance. This study was undertaken to determine how lipid species change during post-freezing recovery and to determine the effect of two PLDs, PLDδ1 and PLD, on lipid changes …
The Plant Ontology Database: A Community Resource For Plant Structure And Developmental Stages Controlled Vocabulary And Annotations, Shulamit Avraham, Chih-Wei Tung, Katica Ilic, Pankaj Jaiswal, Elizabeth Kellogg, Susan Mccouch, Anuradha Pujar, Leonore Reiser, Seung Rhee, Martin Sachs, Mary Schaeffer, Lincoln Stein, Peter Stevens, Leszek Vincent, Felipe Zapata, Doreen Ware
The Plant Ontology Database: A Community Resource For Plant Structure And Developmental Stages Controlled Vocabulary And Annotations, Shulamit Avraham, Chih-Wei Tung, Katica Ilic, Pankaj Jaiswal, Elizabeth Kellogg, Susan Mccouch, Anuradha Pujar, Leonore Reiser, Seung Rhee, Martin Sachs, Mary Schaeffer, Lincoln Stein, Peter Stevens, Leszek Vincent, Felipe Zapata, Doreen Ware
Biology Department Faculty Works
The Plant Ontology Consortium (POC, http://www.plantontology.org ) is a collaborative effort among model plant genome databases and plant researchers that aims to create, maintain and facilitate the use of a controlled vocabulary (ontology) for plants. The ontology allows users to ascribe attributes of plant structure (anatomy and morphology) and developmental stages to data types, such as genes and phenotypes, to provide a semantic framework to make meaningful cross-species and database comparisons. The POC builds upon groundbreaking work by the Gene Ontology Consortium (GOC) by adopting and extending the GOC's principles, existing software and database structure. Over the past year, POC …
Puf1p Acts In Combination With Other Yeast Puf Proteins To Control Mrna Stability, Wendy Olivas, Randi Ulbricht
Puf1p Acts In Combination With Other Yeast Puf Proteins To Control Mrna Stability, Wendy Olivas, Randi Ulbricht
Biology Department Faculty Works
The eukaryotic Puf proteins bind 3′ untranslated region (UTR) sequence elements to regulate the stability and translation of their target transcripts, and such regulatory events are critical for cell growth and development. Several global genome analyses have identified hundreds of potential mRNA targets of the Saccharomyces cerevisiae Puf proteins; however, only three mRNA targets for these proteins have been characterized thus far. After direct testing of nearly 40 candidate mRNAs, we established two of these as true mRNA targets of Puf-mediated decay in yeast, HXK1 and TIF1. In a novel finding, multiple Puf proteins, including Puf1p, regulate both of these …
The Dynamic Evolutionary History Of The Bananaquit (Coereba Flaveola) In The Caribbean Revealed By A Multigene Analysis, Eva Bellemain, Eldredge Bermingham, Robert Ricklefs
The Dynamic Evolutionary History Of The Bananaquit (Coereba Flaveola) In The Caribbean Revealed By A Multigene Analysis, Eva Bellemain, Eldredge Bermingham, Robert Ricklefs
Biology Department Faculty Works
BackgroundThe bananaquit (Coereba flaveola) is a small nectivorous and frugivorous emberizine bird (order Passeriformes) that is an abundant resident throughout the Caribbean region. We used multi-gene analyses to investigate the evolutionary history of this species throughout its distribution in the West Indies and in South and Middle America. We sequenced six mitochondrial genes (3744 base pairs) and three nuclear genes (2049 base pairs) for forty-four bananaquits and three outgroup species. We infer the ancestral area of the present-day bananaquit populations, report on the species' phylogenetic, biogeographic and evolutionary history, and propose scenarios for its diversification and range expansion.ResultsPhylogenetic concordance between …