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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
La Diversidad De Los Análisis De Diversidad La Diversidad De Los Analisis De Diversidad [The Diversity Of Diversity Analyses], Victor D. Carmona-Galindo, Tizziana V. Carmona
La Diversidad De Los Análisis De Diversidad La Diversidad De Los Analisis De Diversidad [The Diversity Of Diversity Analyses], Victor D. Carmona-Galindo, Tizziana V. Carmona
Biology Faculty Works
There is a lack of consistency with respect to the use of the terms like species richness, diversity and biodiversity, which extends to the analysis of diversity indices and the merit of using diversity indices in the evaluation (comparison and contrast) of biological communities. The purpose of this article is to provide working definitions for these terms and cite examples from the primary literature that demonstrate the utility of estimating richness, evaluating proportional abundance patterns, as well as comparing indices of diversity and similarity to study patterns of biological organization at different ecological scales. Additionally, we provide a manual in …
The Relationship Between Castor Bean Stem Diameter And Extrafloral Nectary Gland Size, Victor D. Carmona, Stephen Line, Kevin Hong
The Relationship Between Castor Bean Stem Diameter And Extrafloral Nectary Gland Size, Victor D. Carmona, Stephen Line, Kevin Hong
Biology Faculty Works
This project sought to characterize plant defense investment in the castor bean (Ricinus communis L.), an exotic myrmecophyte in southern California, with respect to life history strategies. Experimental evidence suggests that exotic myrmecophytes can form mutually beneficial associations with exotic ants regardless of the differences in shared evolutionary histories. Castor bean plant investment in defense was evaluated by measuring the area on extra-floral nectary (EFN) glands. Life history strategies may change with respect to plant size and was therefore evaluated in terms of basal stem diameter (
An Examination Of Opuntia Littoralis Fruit Volume, Sugar Concentration, Number Of Seeds And Average Seed Mass In Relation To Fitness, Victor D. Carmona, Kathleen Foster, Carolyne Hoey
An Examination Of Opuntia Littoralis Fruit Volume, Sugar Concentration, Number Of Seeds And Average Seed Mass In Relation To Fitness, Victor D. Carmona, Kathleen Foster, Carolyne Hoey
Biology Faculty Works
Organisms cannot maximize all life functions and therefore must allocate resources to maximize reproductive fitness such that they produce the highest number of surviving offspring. The object of the experiment was to evaluate variation of fruit morphology to determine how Opuntia littoralis optimizes reproductive investment. The experiment focused on fruit volume, sugar concentration, number of seeds and average seed mass on two different aspects (polar-facing and equatorial-facing slopes) in Temescal Canyon Gateway Park, Pacific Palisades, California. The results revealed fruit volume was positively correlated with number of seeds, sugar concentration was positively correlated with number of seeds, and average seed …
Relationship Between Elaiosome And Efn Gland Size In Castor Bean (Ricinus Communis L.), An Exotic Mymercophyte In Southern California, Victor D. Carmona, Andrew Henslin, Lisa Liceaga
Relationship Between Elaiosome And Efn Gland Size In Castor Bean (Ricinus Communis L.), An Exotic Mymercophyte In Southern California, Victor D. Carmona, Andrew Henslin, Lisa Liceaga
Biology Faculty Works
Castor bean (Ricinus communis L.) relies on seed dispersal by attracting ants with elaiosomes; lipid rich seed appendages, which serve as a source of food for ant larvae. Additionally, castor bean petioles and inflorescences have extra floral nectary (EFN) glands that secrete sugars that also attract ants, which in return, defend against herbivores. We propose that in order to attract ants, castor bean would have to balance allocation of energy toward plant defense and seed dispersal per the Principle of Allocation. Specifically, we hypothesized that in castor bean, an increase in elaiosome size would correspond to result in …
Assessing The Impact Of Invasive Species Management Strategies On The Population Dynamics Of Castor Bean (Ricinus Communis L., Euphorbiaceae) At Two Southern California Coastal Habitats, Victor D. Carmona, Daryle Hinton-Hardin, Jodi Kagihara, Mary Rose T. Pascua
Assessing The Impact Of Invasive Species Management Strategies On The Population Dynamics Of Castor Bean (Ricinus Communis L., Euphorbiaceae) At Two Southern California Coastal Habitats, Victor D. Carmona, Daryle Hinton-Hardin, Jodi Kagihara, Mary Rose T. Pascua
Biology Faculty Works
No abstract provided.
Anthropogenic Impacts Of Irrigation On The Arthropod Community Structure Of A Coastal Sage Scrub Habitat In Los Angeles, Victor D. Carmona, Justin Aquino, Mindi Catala
Anthropogenic Impacts Of Irrigation On The Arthropod Community Structure Of A Coastal Sage Scrub Habitat In Los Angeles, Victor D. Carmona, Justin Aquino, Mindi Catala
Biology Faculty Works
We evaluated the effects of an irrigation system on the community structure of arthropods in a coastal sage scrub chaparral habitat. We placed 5 traps in the irrigated site and 5 traps in control site, for a total of 10 sticky traps (using Tree Tanglefoot) in an area adjacent to Ballona Wetlands in Los Angeles, California. The traps were set at the irrigated and non-irrigated site on Telegraph Weed for one week. Results showed that morphospecies richness, relative abundance, and taxonomic order representation were higher at the control site than at the irrigated site. Our study documents how anthropogenic impacts …
A Preliminary Study Of Ricinus Communis Survivorship At Ballona Wetlands And Temescal Canyon, Los Angeles, California, Victor D. Carmona-Galindo, Daryle Hinton-Hardin, Jodi Kagihara, Mary Rose Pascua
A Preliminary Study Of Ricinus Communis Survivorship At Ballona Wetlands And Temescal Canyon, Los Angeles, California, Victor D. Carmona-Galindo, Daryle Hinton-Hardin, Jodi Kagihara, Mary Rose Pascua
Biology Faculty Works
Invasive plants such as Castor bean (Ricinus communis) are known to threaten ecosystems due to their competition for resources. The Ballona Wetlands and Temescal Canyon managers employ different techniques to manage the spread of R. communis, potentially resulting in differences in plant survivorship. To investigate this possibility, height of the stems of individual R. communis plants at each site were recorded in order to assign them to cohort groups. Based on the hypothesis predicted that R. communis would have a similar cohort structure at both sites but would exhibit higher survivorship at Temescal Canyon, where R. communis …
Behavior And Survival Of Mytilus Congeners Following Episodes Of Elevated Body Temperature In Air And Seawater, W. Wesley Dowd, George N. Somero
Behavior And Survival Of Mytilus Congeners Following Episodes Of Elevated Body Temperature In Air And Seawater, W. Wesley Dowd, George N. Somero
Biology Faculty Works
Coping with environmental stress may involve combinations of behavioral and physiological responses. We examined potential interactions between adult musselsʼ simple behavioral repertoire – opening/closing of the shell valves – and thermal stress physiology in common-gardened individuals of three Mytilus congeners found on the West Coast of North America: two native species (M. californianus and M. trossulus) and one invasive species from the Mediterranean (M. galloprovincialis). We first continuously monitored valve behavior over three consecutive days on which body temperatures were gradually increased, either in air or in seawater. A temperature threshold effect was evident between 25 and 33°C in several …
Differential Bait Preference And Rate Of Attraction By Argentine Ants (Linepithema Humile Mayr) At Freshwater And Saltwater Marsh Sites In Southern California, Victor D. Carmona-Galindo, Meghan Moore, Melanie Tansuwan
Differential Bait Preference And Rate Of Attraction By Argentine Ants (Linepithema Humile Mayr) At Freshwater And Saltwater Marsh Sites In Southern California, Victor D. Carmona-Galindo, Meghan Moore, Melanie Tansuwan
Biology Faculty Works
Ants are a type of foraging insect species which harvests food resources based on availability. When ants locate food resources that are scarce within their habitat, they tend to be more strongly attracted to that food resource. This study used protein, carbohydrate and control based baits to examine if there was a deficiency in resources demonstrated by the ants at two different wetland habitats. We sampled Argentine ants (Linepithema humileMayr) within the saltwater and freshwater marshes of Ballona Wetlands in Los Angeles, CA. We found significant differences in the rapid deployment of Argentine ants towards protein baits over …
A Small Molecule Inhibitor Of Redox-Regulated Protein Translocation Into Mitochondria, Deepa V. Dabir
A Small Molecule Inhibitor Of Redox-Regulated Protein Translocation Into Mitochondria, Deepa V. Dabir
Biology Faculty Works
The mitochondrial disulfide relay system of Mia40 and Erv1/ALR facilitates import of the small translocase of the inner membrane (Tim) proteins and cysteine-rich proteins. A chemical screen identified small molecules that inhibit Erv1 oxidase activity, thereby facilitating dissection of the disulfide relay system in yeast and vertebrate mitochondria. One molecule, mitochondrial protein import blockers from the Carla Koehler laboratory (MitoBloCK-6), attenuated the import of Erv1 substrates into yeast mitochondria and inhibited oxidation of Tim13 and Cmc1 in in vitro reconstitution assays. In addition, MitoBloCK-6 revealed an unexpected role for Erv1 in the carrier import pathway, namely transferring substrates from the …
Variation Of Nimc1 Expression In Drosophila Stocks And Transgenic Strains, Cory Evans
Variation Of Nimc1 Expression In Drosophila Stocks And Transgenic Strains, Cory Evans
Biology Faculty Works
The NimC1 molecule has been described as a phagocytosis receptor, and is being used as a marker for professional phagocytes, the plasmatocytes, in Drosophila melanogaster. In studies including tumor-biology, developmental biology, and cell mediated immunity, monoclonal antibodies (P1a and P1b) to the NimC1 antigen are used. As we observed that these antibodies did not react with plasmatocytes of several strains and genetic combinations, a molecular analysis was performed on the structure of the nimC1 gene. In these strains we found 2 deletions and an insertion within the nimC1 gene, which may result in the production of a truncated NimC1 protein. …