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EFFECTS OF PATCH SIZE AND MATRIX TYPE ON BIRD ASSEMBLAGES WITHIN CENTRAL FLORIDA CYPRESS DOMES
Title
EFFECTS OF PATCH SIZE AND MATRIX TYPE ON BIRD ASSEMBLAGES WITHIN CENTRAL FLORIDA CYPRESS DOMES.
Creator
Noran, Julia, Noss, Reed F., University of Central Florida
Abstract / Description
The numerous studies on the effects of patch size on bird assemblages have produced varied results. I studied the effects of patch size and surrounding matrix on bird assemblages within central Florida cypress domes. My null hypothesis was that bird assemblages within cypress domes are unaffected by dome size or development in the matrix around the dome. My alternative hypothesis was that differences in bird assemblages are correlated with size and the degree of development within the matrix....
Show moreThe numerous studies on the effects of patch size on bird assemblages have produced varied results. I studied the effects of patch size and surrounding matrix on bird assemblages within central Florida cypress domes. My null hypothesis was that bird assemblages within cypress domes are unaffected by dome size or development in the matrix around the dome. My alternative hypothesis was that differences in bird assemblages are correlated with size and the degree of development within the matrix. I classified a pool of over a thousand domes according to three size categories and four matrix types. Three representatives for each combination of size and matrix were spot mapped for birds from May through August 2005. I examined the relationship of species richness and bird guilds to patch size and surrounding matrix. I also measured a series of potential covariates for each dome to account for variation among the three size-matrix representatives for each combination. Richness and abundance counts were divided by the number of listening points to standardize the data by effort. I found that the standardized species richness of bird assemblages significantly increased with the patch size of cypress domes; however, matrix and the interaction effect of size and matrix on overall standardized species richness were not significant. Significant covariates included percent of the buffer undeveloped, percent herbaceous cover, and the number of listening points per unit area. A linear regression tested for significant effects of log area and matrix on standardized species richness. Matrix was not significant, but log area did have a significant effect on standardized species richness. The MANOVA tests for guild richness data indicated no significant effects of dome size, matrix, or their interaction effect on diet, foraging, or location guilds. There were no significant main or interaction effects on any individual guilds in the ANOVA output. Individual backward linear regressions done on each guild indicated that matrix did not have significant effects on any guild, but log area had significant effects on ground foragers, lower-canopy foragers, omnivores, herbivores, and edge species. I then investigated the effects of size and matrix on standardized guild abundance. Dome size and matrix significantly effected diet guild abundance, but the size-matrix interaction did not. Dome size significantly affected insectivores, omnivores, and carnivores. Matrix had a significant effect on omnivores, herbivores, and carnivores. The size and matrix interaction had a significant effect on carnivores. Dome size and matrix significantly affected foraging guild abundance, but the size-matrix interaction did not. Dome size significantly affected ground, lower- and upper-canopy foragers. Matrix had a significant effect on ground, water, and upper-canopy foragers. The size and matrix interaction was not significant for any foraging guild. Dome size and matrix significantly effected location guild abundance, but the size-matrix interaction did not. Dome size significantly affected edge and interior species. Matrix had a significant effect on edge and interior species. The size and matrix interaction was not significant for any location guild. The relationship between species richness and habitat area is well-documented, and the results of this study were consistent with the expectation of higher species richness in larger areas. If maintaining high species richness is the sole goal of conservationists, then large habitat fragments would be preferable regardless of surrounding matrix. Nevertheless, species richness alone is not informative of the potential effects of patch size and matrix on the composition of an avian assemblage. Guild analysis gives insight into community structure and should be considered in addition to simple measures of species richness. Patch size and matrix type significantly affected a number of guilds, and several factors could contribute to the observed differences in guilds across patch size categories and matrix types. Different habitats are available to birds in domes of each size class and matrix type. The potential for diverse foraging opportunities increases as domes increase in size and change in relation to their surrounding matrix. A more detailed analysis is needed to determine how differences in vegetation of domes and surrounding matrix affect guilds, members of which may use habitats both within domes and the matrix. Cypress domes in the central Florida area face severe alteration or destruction due to rapid development. Long-term research that focuses on domes before and after development is needed to understand how changes in the matrix or size of the domes affect all resident flora and fauna. A variety of taxa and biogeochemical processes should be researched. Domes are naturally highly variable in size, shape, and structure, and development changes all of these characteristics. Conservation biologists and managers urgently need to determine how development affects cypress domes and what can be done to maintain their characteristic biodiversity.
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Date Issued
2006
Identifier
CFE0001010, ucf:46842
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001010
THE MEMORY OF FORGOTTEN THINGS
Title
THE MEMORY OF FORGOTTEN THINGS.
Creator
Metz, Brittany, Poindexter, Carla, University of Central Florida
Abstract / Description
This thesis investigates my lack of childhood memories and documents how my artwork stands in as a substitute for that lost memory. The first part of the thesis analyzes my early life and influences; the second part analyzes my art making and process. The narrative style of writing is intentionally autobiographical to mimic the narrative style and structure of the thesis installation. My upbringing, interests, creative process, access to materials, and inspiration are fully explored. The...
Show moreThis thesis investigates my lack of childhood memories and documents how my artwork stands in as a substitute for that lost memory. The first part of the thesis analyzes my early life and influences; the second part analyzes my art making and process. The narrative style of writing is intentionally autobiographical to mimic the narrative style and structure of the thesis installation. My upbringing, interests, creative process, access to materials, and inspiration are fully explored. The impact my early life has on my current work is evident. Real memory is combined with created memory in the thesis multi-media installation. I wish to transport the viewer into the dreamlike space I have constructed with found objects and multi-media materials by offering an immersive experience into my world.
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Date Issued
2011
Identifier
CFE0003649, ucf:48814
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0003649
Phylogenetic Community Structure of Aquatic Beetle Assemblages in a Multi-Wetland Experiment
Title
Phylogenetic Community Structure of Aquatic Beetle Assemblages in a Multi-Wetland Experiment.
Creator
Kelly, Sandor, Jenkins, David, Parkinson, Christopher, Crampton, William, Song, Hojun, University of Central Florida
Abstract / Description
Phylogenetic Community Structure (PCS) metrics are becoming more common in community ecology. PCS metrics estimate the phylogenetic relatedness among members of an ecological community or assemblage. If ecological traits are conserved, then phylogenetic clustering (i.e., taxa are more closely related than expected by chance) indicates habitat filtering as the key process in community assembly. On the other hand, a pattern of phylogenetic overdispersion (i.e., taxa are more distantly related...
Show morePhylogenetic Community Structure (PCS) metrics are becoming more common in community ecology. PCS metrics estimate the phylogenetic relatedness among members of an ecological community or assemblage. If ecological traits are conserved, then phylogenetic clustering (i.e., taxa are more closely related than expected by chance) indicates habitat filtering as the key process in community assembly. On the other hand, a pattern of phylogenetic overdispersion (i.e., taxa are more distantly related than expected by chance) suggests competition is dominant. Most studies to date have used PCS of unmanipulated ecosystems, but the value of PCS metrics will be best revealed in experiments. This project used PCS for aquatic beetle (Coleoptera) assemblages in experimentally manipulated seasonal wetlands on a cattle ranch in south-central Florida, and compared PCS metrics to standard ecological metrics. Wetlands were experimentally treated with all combinations of pasture management, fencing to exclude cattle, and controlled burning during 2006-2009. Beetle assemblages in fenced wetlands were significantly more overdispersed compared to non-fenced wetlands, suggesting that this treatment decreases habitat filtering, causing competition to become the dominant process in community formation. There was also a significant pasture x fence x burn interaction effect, with assemblages in wetlands differing in PCS depending on what combination of the three treatments were applied. Phylogenetic Diversity (PD (-) a measure of branch length of a community or assemblage on a phylogenetic tree) was highly correlated with genera richness (number of genera), and these metrics along with the expected number of genera (D (-) an ecological diversity index) found significant differences among burn treatments and a pasture x burn interaction. The results of this study indicate that PCS metrics complement classical ecological methods and should be widely applied.
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Date Issued
2012
Identifier
CFE0004394, ucf:49388
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004394
Identifying Archetypal Attributes of Maya Ceremonial Architecture: Clues to the Late Classic Sociopolitical Status of Pacbitun, Belize
Title
Identifying Archetypal Attributes of Maya Ceremonial Architecture: Clues to the Late Classic Sociopolitical Status of Pacbitun, Belize.
Creator
Micheletti, George, Chase, Arlen, Barber, Sarah, Powis, Terry, Chase, Diane, University of Central Florida
Abstract / Description
The E Group complex is one of the most widely known archetypes in Maya archaeology. The complex's easily recognized configuration has helped archaeologists to identify this archetype at hundreds of sites throughout the Southern Maya Lowlands. However, things are not always what they appear to be. Conducted by Jaime Awe and colleagues (2016), a reinvestigation of excavation data of assemblages long designated as E Group complexes in a region known as the Belize River Valley revealed several...
Show moreThe E Group complex is one of the most widely known archetypes in Maya archaeology. The complex's easily recognized configuration has helped archaeologists to identify this archetype at hundreds of sites throughout the Southern Maya Lowlands. However, things are not always what they appear to be. Conducted by Jaime Awe and colleagues (2016), a reinvestigation of excavation data of assemblages long designated as E Group complexes in a region known as the Belize River Valley revealed several unique attributes not typical of the E Group complex. Awe et al. (2016) suggest that these assemblages appear to function more as (")eastern shrines(") than E Groups and propose they be relabeled as (")eastern triadic assemblages.(") Therefore, the purpose of this thesis is to provide a more comprehensive and methodological study of a single Belize Valley assemblage located at the site of Pacbitun, Belize. The temporal examination of Pacbitun's assemblage provided in this thesis was able to identify physical, spatial, and functional attributes associated with each phase of construction. These attributes were then compared with attributes associated with E Groups, eastern shrines, and eastern triadic assemblages. The results revealed that, while Pacbitun's assemblage does follow the architectural progression exhibited by other Belize Valley assemblages, the assemblage does not truly become an eastern triadic assemblage until the beginning of the Late Classic period (AD 550). Furthermore, the transition of Pacbitun's assemblage coincides with several other architectural modifications in and around the site suggesting that Pacbitun was experiencing sociopolitical change or unrest at this time. The breakdown of the political organization of the Belize Valley will provide scenarios concerning Pacbitun's political situation as well as an explanation for the unique architectural progression of Pacbitun's assemblage through time. This study hopes to not only contribute to current and future research of the Belize Valley eastern triadic assemblages but also to the understanding of the Classic period political situation of Pacbitun in the Belize River Valley.
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Date Issued
2016
Identifier
CFE0006356, ucf:51539
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0006356