Current Search: Ecosystem (x)
Pages
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Title
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Community structure and distributionof fishes in an enclosed high island lagoon in Guam.
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Creator
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Jones, Robert S., Chase, J. A., Harbor Branch Oceanographic Institute
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Date Issued
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1975
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PURL
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http://purl.flvc.org/fau/fd/FA00007093
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Subject Headings
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Guam, Lagoons, Fish communities, Ecosystem
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Format
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Document (PDF)
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Title
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The role of advection in transporting nutrients to the Florida reef tract.
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Creator
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Pitts, Patrick A., Harbor Branch Oceanographic Institute
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Date Issued
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2002
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PURL
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http://purl.flvc.org/fau/fd/FA00007035
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Subject Headings
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Reefs--Florida, Eutrophication, Nutrients in ecosystems
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Format
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Document (PDF)
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Title
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Confirming ecological factors affecting mangrove prop roots as habitat for oysters through structural equation modeling.
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Creator
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Aquino-Thomas, Jessene, Proffitt, C. Edward
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Date Issued
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2012-04-06
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PURL
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http://purl.flvc.org/fcla/dt/3348615
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Subject Headings
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Marine ecosystems, Terrestrial ecosystems, Mangrove prop roots, Mangrove tree communities, Oyster habitat, Oyster reefs
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Format
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Document (PDF)
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Title
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Valuing the Invaluable: Piquant Georgia Low-Country Marsh Ecosystem Services.
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Creator
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Wood, Alyssa A., Polsky, Colin, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
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Abstract/Description
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Coastal ecosystems, such as the salt marsh of the Georgia coast, have long been valued for decision-making purposes based on market-values of goods and services including: fishery landings, hedonic pricing of waterfront homes, and tourism dollars. These values do not show the full picture of services provided by these ecosystems. Using focus group discussions and key informant interviews I investigate socio-cultural values and benefits provided by salt marsh ecosystems in central coastal...
Show moreCoastal ecosystems, such as the salt marsh of the Georgia coast, have long been valued for decision-making purposes based on market-values of goods and services including: fishery landings, hedonic pricing of waterfront homes, and tourism dollars. These values do not show the full picture of services provided by these ecosystems. Using focus group discussions and key informant interviews I investigate socio-cultural values and benefits provided by salt marsh ecosystems in central coastal Georgia. Participants noted that through their experiences in marshes they developed a desire to be stewards. This desire, coupled with the industrial pollution, residential development, and sea-level rise threats in the area result in a need for cooperative conservation and thus better enforcement of existing regulations. This relational value persisted across geographic locations and sample populations. My results show the importance of utilizing diverse members of community to elicit qualitative value statements.
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Date Issued
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2017
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PURL
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http://purl.flvc.org/fau/fd/FA00004993
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Subject Headings
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Dissertations, Academic -- Florida Atlantic University, Salt marshes., Ecosystem services., Ecosystem services--Valuation.
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Format
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Document (PDF)
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Title
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Marsh Ecosystem Services, Benefits, and Perceptions of Value: Case Studies in Massachusetts, Virginia, and Georgia.
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Creator
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Edwards, Vince, Polsky, Colin, Florida Atlantic University, Charles E. Schmidt College of Science, Center for Environmental Studies
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Abstract/Description
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Human reliance on the goods and services provided by ecosystems and the global decline in the health of many of these ecosystems, necessitates ecosystem valuation for the purposes of decision-making and conservation policy. The literature suggests that conventionally employed economic valuation methods have been unsuccessful in capturing the full scope of the benefits ecosystems provide, particularly those benefits that are considered cultural. This research explores public perceptions of...
Show moreHuman reliance on the goods and services provided by ecosystems and the global decline in the health of many of these ecosystems, necessitates ecosystem valuation for the purposes of decision-making and conservation policy. The literature suggests that conventionally employed economic valuation methods have been unsuccessful in capturing the full scope of the benefits ecosystems provide, particularly those benefits that are considered cultural. This research explores public perceptions of salt marsh value through the use of focus groups in marsh-adjacent communities in Massachusetts, Virginia, and Georgia. Results suggest that in case study communities, outdoor experiences in salt marshes inspire serenity in Massachusetts, shape shore and “marsh” identities in Virginia, and promote stewardship cultivation in Georgia. Perceived threats to these benefits, such as the threat of residential development, industrial pollution, and increasing flood risk, together constitute the context for various community responses related to marsh protection. Results contribute to existing economic valuations.
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Date Issued
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2017
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PURL
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http://purl.flvc.org/fau/fd/FA00004999
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Subject Headings
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Dissertations, Academic -- Florida Atlantic University, Ecosystem services--Case studies., Salt marshes., Ecosystem services--Valuation.
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Format
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Document (PDF)
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Title
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In vitro culture of the ascidian Ecteinascidia turbinata to supply the antitumor compounds ecteinascidins.
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Creator
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Duckworth, Alan R., Samples, Gail A., Wright, Amy E., Pomponi, Shirley A.
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Date Issued
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2004
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PURL
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http://purl.flvc.org/FCLA/DT/2827818
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Subject Headings
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Ascidians, Microalgae --Congresses, Marine ecology, Marine ecosystem management, Antineoplastic agents
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Format
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Document (PDF)
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Title
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Effect of external pH on cyanobacterial pigment expression.
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Creator
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West, Maria., Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
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Abstract/Description
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Cyanobacteria are classified as alkalophiles despite their preferential uptake of the acidic form of dissolved inorganic carbon. Long term impacts of external pH on the expression of photosynthetic and structural pigments in Schizothrix calcicola were investigated as potential contributing factors to this phenomenon. More robust cell walls in S. calcicola at pH
Show moreCyanobacteria are classified as alkalophiles despite their preferential uptake of the acidic form of dissolved inorganic carbon. Long term impacts of external pH on the expression of photosynthetic and structural pigments in Schizothrix calcicola were investigated as potential contributing factors to this phenomenon. More robust cell walls in S. calcicola at pH <7 are suggested by significantly greater expression of myxoxanthophylls. Direct and indirect physiological costs of altering cell walls may contribute to S. calcicola's depressed growth at acidic pH. Comparison of chlorophylls expression suggests that alkaline rather than neutral external pH is only beneficial for S. calcicola growth in absence of nutrient limitation. While the cyanobacterial biomarker ratio of chlorophylls to echinenone was stable across the pertinent pH range of 6-8, other pigment ratios in S. calcicola were affected by pH with an approximately two week lag between the change of pH and the corresponding change of pigment expression.
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Date Issued
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2010
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PURL
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http://purl.flvc.org/FAU/2795335
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Subject Headings
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Environmental toxicology, Cyanobacteria, Environmental aspects, Ecosystem management, Vegetation dynamics
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Format
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Document (PDF)
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Title
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The impact of willow encroachment on water and carbon exchange in the vegetation of a subtropical wetland.
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Creator
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Budny, Michelle L., Benscoter, Brian, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
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Abstract/Description
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Shortened periods of inundation due to water management have led to the encroachment and expansion of Carolina willow (Salix caroliniana) in sawgrass (Cladium jamaicense) marsh communities. Morphologic and physiologic differences between sawgrass and willow have potential consequences for microhabitat conditions and ecosystem function such as a reduction in temperatures and light availability and changes in primary productivity. Since it is a woody shrub, willow is often assumed to exhibit...
Show moreShortened periods of inundation due to water management have led to the encroachment and expansion of Carolina willow (Salix caroliniana) in sawgrass (Cladium jamaicense) marsh communities. Morphologic and physiologic differences between sawgrass and willow have potential consequences for microhabitat conditions and ecosystem function such as a reduction in temperatures and light availability and changes in primary productivity. Since it is a woody shrub, willow is often assumed to exhibit higher rates of transpiration than non woody plants, which in turn can affect photosynthesis and carbon exchange and ultimately wetland water management. In this study willow was found to have higher rates of stomatal conductance (gs) and photosynthesis (Anet) than sawgrass. However, sawgrass had greater intrinsic water use efficiency (WUE) than willow. This suggests that willow is capable of greater gas exchange and carbon assimilation than sawgrass but requires more water. Understanding the implications of willow expansion will improve landscape models of wetland water and carbon exchange and inform water management decisions.
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Date Issued
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2015
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PURL
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http://purl.flvc.org/fau/fd/FA00004350, http://purl.flvc.org/fau/fd/FA00004350
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Subject Headings
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Biogeochemistry, Ecosystem management, Surfaces (Technology) -- Measurement, Vegetation dynamics, Wetland ecology
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Format
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Document (PDF)
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Title
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REESTABLISHMENT OF A QUEEN CONCH, LOBATUS GIGAS, BREEDING POPULATION IN A MARINE PROTECTED AREA IN THE BAHAMAS.
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Creator
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Norton, Laura E. Issac, Davis, Megan, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
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Abstract/Description
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The queen conch, Lobatus gigas, is key to the Bahamian way of life. Recent studies suggest that commercial stocks will be depleted in The Bahamas in 10-15 years. In response to this, an egg farm was established in a historic breeding ground in Moriah Harbour Cay National Park, Exuma, Bahamas. Previously used for aquaculture, the egg farm concept was tested as a restoration method. Conch were tagged (n=251) and stocked in a 1,385 m2 (0.14 ha) circular enclosure at an equivalent density of 1...
Show moreThe queen conch, Lobatus gigas, is key to the Bahamian way of life. Recent studies suggest that commercial stocks will be depleted in The Bahamas in 10-15 years. In response to this, an egg farm was established in a historic breeding ground in Moriah Harbour Cay National Park, Exuma, Bahamas. Previously used for aquaculture, the egg farm concept was tested as a restoration method. Conch were tagged (n=251) and stocked in a 1,385 m2 (0.14 ha) circular enclosure at an equivalent density of 1,813/ha or 1 conch/5.5 m2. The egg farm was visited every 24-48 hours during the study period (May 26-August 14, 2019) to examine conch distribution, burial, predation, breeding, and egg mass laying. Queen conch Essential Fish Habitat was characterized in this study, contributing to a knowledge gap concerning conch spawning areas. No egg masses were laid, despite temperature, sediment solid-phase organics, calcium carbonate, and other seagrass habitat characteristics displaying similarities to previous studies in which conch spawned. It is speculated that egg laying did not occur due to handling disturbances, which may have caused the conch to resorb their gonads. Comprehensive recommendations are made for future egg farms intended for restoration.
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Date Issued
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2020
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PURL
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http://purl.flvc.org/fau/fd/FA00013458
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Subject Headings
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Queen Conch, Bahamas, Marine protected areas, Ecosystem restoration
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Format
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Document (PDF)
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Title
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The distribution of the non-indigenous invasive Old World climbing fern, Lygodium microphyllum, in southern Florida: The relationship to abiotic and biotic variables.
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Creator
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Stewart, Joy Elaine., Florida Atlantic University, Volin, John C.
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Abstract/Description
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Old World Climbing Fern, Lygodium microphyllum is an aggressive nonindigenous plant that is on the verge of becoming a major ecological threat in South Florida. Currently, specific habitat characteristics that contribute to success or failure of its establishment are unknown. I studied the pattern of distribution of the fern in Florida's Big Cypress Swamp. Two similar forested wetland sites with high incidence of L. microphyllum infestation were assessed in order to identify broad-scale...
Show moreOld World Climbing Fern, Lygodium microphyllum is an aggressive nonindigenous plant that is on the verge of becoming a major ecological threat in South Florida. Currently, specific habitat characteristics that contribute to success or failure of its establishment are unknown. I studied the pattern of distribution of the fern in Florida's Big Cypress Swamp. Two similar forested wetland sites with high incidence of L. microphyllum infestation were assessed in order to identify broad-scale hydrological and physiographic conditions that may favor high susceptibility to L. microphyllum invasion. On each site, species richness, abundance and distribution of herbs, shrubs and trees were characterized. In addition, several parameters including elevation, substrate depth, percentage substrate water content, percentage substrate organic content, substrate texture, and photosynthetically active radiation were quantified. The patterns of distribution of L. microphyfum indicated that presence of the fern was dependent on relatively low elevation, relatively deep substrate and moderately high substrate water content.
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Date Issued
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2002
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PURL
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http://purl.flvc.org/fcla/dt/12890
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Subject Headings
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Ferns--Florida, Lygodium, Ecosystem management, Invasive plants--Florida
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Format
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Document (PDF)
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Title
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Trophic Ecology of the Slender Snipe Eel, Nemichthys scolopaceus (Anguilliformes: Nemichthyidae).
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Creator
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Feagans, Jennifer N., Sutton, Tracey T., Florida Atlantic University
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Abstract/Description
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Roughly 92% of the total volume of Earth's oceans is considered deep sea. The eel species, Nemichthys scolopaceus, inhabits these waters, and little is known of its diet, its place within pelagic food webs, and its overall ecological impact. In this study we quantitatively estimate the abundance, feeding and predation impact of this key predator. Specimens were collected in 2004 along Georges Bank as part of the Census of Marine Life Gulf of Maine project. Gut contents were analyzed,...
Show moreRoughly 92% of the total volume of Earth's oceans is considered deep sea. The eel species, Nemichthys scolopaceus, inhabits these waters, and little is known of its diet, its place within pelagic food webs, and its overall ecological impact. In this study we quantitatively estimate the abundance, feeding and predation impact of this key predator. Specimens were collected in 2004 along Georges Bank as part of the Census of Marine Life Gulf of Maine project. Gut contents were analyzed, revealing thirteen prey types, primarily euphausiids and decapod crustaceans. Other potential prey (i.e. fishes) were absent from the diet, suggesting a fairly selective feeding preference. Of the 85 fish species collected, N scolopaceus ranked second in abundance and first in total fish biomass. Therefore, this species is not only a large biomass contributor, but perhaps cycles a great deal of macrocrustacean carbon through deep-pelagic fishes in this, and likely other, ecosystems.
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Date Issued
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2008
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PURL
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http://purl.flvc.org/fau/fd/FA00000760
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Subject Headings
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Predatory marine animals--Ecology, Marine ecosystem management, Aquatic ecology
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Format
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Document (PDF)
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Title
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THE EFFECTS OF NUTRIENT INPUTS ON SURFACE ELEVATION CHANGE PROCESSES IN TIDAL MANGROVE FORESTS.
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Creator
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Conrad, Jeremy R., Benscoter, Brian, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
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Abstract/Description
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Coastal mangrove forests are at risk of being submerged due to sea level rise (SLR). However, mangroves have persisted with changing sea levels due to a variety of biotic and physical feedback mechanisms that allow them to gain and maintain relative soil surface elevation. Mechanisms of surface elevation change (SEC) include leaf, wood, and root production, decomposition, and sedimentation/erosion, the combination of which result in a net change in the soil’s surface elevation. Therefore,...
Show moreCoastal mangrove forests are at risk of being submerged due to sea level rise (SLR). However, mangroves have persisted with changing sea levels due to a variety of biotic and physical feedback mechanisms that allow them to gain and maintain relative soil surface elevation. Mechanisms of surface elevation change (SEC) include leaf, wood, and root production, decomposition, and sedimentation/erosion, the combination of which result in a net change in the soil’s surface elevation. Therefore, mangrove forest resilience to SLR is dependent upon their ability to migrate inland or to build soil elevation at a rate that tracks with SLR. However, anthropogenic disturbances, such as altered hydrology and eutrophication, can degrade mangrove forest health and compromise their land building processes placing them at greater risk of succumbing to SLR.
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Date Issued
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2022
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PURL
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http://purl.flvc.org/fau/fd/FA00014078
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Subject Headings
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Mangrove ecology, Sea level, Nutrients in ecosystems, Eutrophication
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Format
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Document (PDF)
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Title
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A comparison of nutrient-limited productivity in macroalgae from a Caribbean barrier reef and from a mangrove ecosystem.
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Creator
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Lapointe, Brian E., Littler, Mark M., Littler, Diane S., Harbor Branch Oceanographic Institute
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Date Issued
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1987
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PURL
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http://purl.flvc.org/FCLA/DT/3353785
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Subject Headings
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Algae, Carrie Bow Cay (Belize), Mangrove ecology, Algal communities, Nutrients in ecosystems
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Format
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Document (PDF)
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Title
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Long term monitoring of a deep-water coral reef: effects of bottom trawling.
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Creator
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Reed, John K., Koenig, Christopher C., Shepard, Andrew N., Gilmore, R. G.
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Date Issued
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2007
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PURL
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http://purl.flvc.org/fau/fd/FA00007322
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Subject Headings
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Bottom trawling, Dredging (Fisheries)--Environmental aspects, Ecosystems, Oculinidae, Coral reef ecology
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Format
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Document (PDF)
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Title
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The role of predationby decapod crustaceans in seagrass ecosystems.
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Creator
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Nelson, Walter G., Harbor Branch Oceanographic Institute
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Date Issued
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1981
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PURL
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http://purl.flvc.org/fau/fd/FA00007090
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Subject Headings
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Seagrasses--Florida--Indian River (Lagoon), Seagrasses--Ecology, Ecosystems, Decapoda (Crustacea), Predation (Biology)
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Format
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Document (PDF)
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Title
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Conservation and Phylogeny of a Novel Family of Non‐Hox Genes of the Antp Class in Demospongiae (Porifera).
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Creator
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Richelle-Maurer, Evelyn, Boury-Esnault, Nicole, Itskovich, Valeria B., Manuel, Michael, Pomponi, Shirley A., Van de Vyver, Gisele, Borchiellini, Carole
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Date Issued
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2006
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PURL
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http://purl.flvc.org/FCLA/DT/2796095
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Subject Headings
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Demospongiae, Homeobox genes, Marine ecosystem management, Phylogeny, Sponges --Bahamas, Sponges --Florida
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Format
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Document (PDF)
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Title
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A New Sterol Sulfate, Sch 572423, from a Marine Sponge, Topsentia sp.
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Creator
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Yang, Shu-Wei, Buevich, Alexei, Chan, Tze-Ming, Smith, Michelle, Lachowicz, Jean, Pomponi, Shirley A., Wright, Amy E., Mierzwa, Ronald, Patel, Mahesh, Gullo, Vincent, Chu, Min
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Date Issued
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2003
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PURL
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http://purl.flvc.org/FCLA/DT/2827816
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Subject Headings
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Water quality bioassay, Water --Pollution --Toxicology, Sponges, Marine ecosystem management, Filters and filtration
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Format
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Document (PDF)
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Title
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A review of the colonization dynamics of the northern curly-tailed lizard (Leiocephalus Carinatus Armouri) in Florida.
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Creator
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Smith, Henry T., Engeman, Richard M.
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Date Issued
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2004-09
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PURL
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http://purl.flvc.org/fcla/dt/11527
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Subject Headings
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Lizards--Florida, Lizards--Reproduction, Reptiles--Florida, Ecosystem management--Florida, Curlytail lizards
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Format
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Document (PDF)
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Title
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Consumptive effects of predatory fish reduce wetland crayfish (Procambarus spp.) recruitment and drive species turnover.
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Creator
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Kellogg, Christopher M., Charles E. Schmidt College of Science, Department of Biological Sciences
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Abstract/Description
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Trade-offs in traits conferring success in permanent and ephemeral habitats are often at odds with few species being able to persist in both types of environments. I examined the effect of sunfish predators on two species of south Florida crayfish to establish the mechanism that limits one species, Procambarus alleni, to short-hydroperiod environments. The crayfish assemblage response to a gradient of sunfish predators and the effect of predation on P. fallax alone was examined. I also...
Show moreTrade-offs in traits conferring success in permanent and ephemeral habitats are often at odds with few species being able to persist in both types of environments. I examined the effect of sunfish predators on two species of south Florida crayfish to establish the mechanism that limits one species, Procambarus alleni, to short-hydroperiod environments. The crayfish assemblage response to a gradient of sunfish predators and the effect of predation on P. fallax alone was examined. I also examined the effects of sunfish on crayfish growth and quantified activity levels and risky behaviors of both crayfish species. P. alleni dominated at low sunfish densities but dominance shifted with increasing sunfish density. P. alleni was more active and likely to initiate risky behaviors, suggesting that sunfish predators remove the more active P. alleni, reducing their numbers disproportionally to those of P. fallax and allowing P. fallax to dominate crayfish assemblages in long-hydroperiod wetlands.
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Date Issued
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2011
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PURL
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http://purl.flvc.org/FAU/3171400
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Subject Headings
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Wetland ecology, Habitat selection, Marine ecosystem management, Predatory marine animals, Ecology
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Format
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Document (PDF)
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Title
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Deep-Water Biogenic Sediment off the Coast of Florida.
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Creator
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Zuccarelli, Claudio L., Oleinik, Anton E., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
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Abstract/Description
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Biogenic “oozes” are pelagic sediments that are composed of > 30% carbonate microfossils and are estimated to cover about 50% of the ocean floor, which accounts for about 67% of calcium carbonate in oceanic surface sediments worldwide. These deposits exhibit diverse assemblages of planktonic microfossils and contribute significantly to the overall sediment supply and function of Florida’s deep-water regions. However, the composition and distribution of biogenic sediment deposits along these...
Show moreBiogenic “oozes” are pelagic sediments that are composed of > 30% carbonate microfossils and are estimated to cover about 50% of the ocean floor, which accounts for about 67% of calcium carbonate in oceanic surface sediments worldwide. These deposits exhibit diverse assemblages of planktonic microfossils and contribute significantly to the overall sediment supply and function of Florida’s deep-water regions. However, the composition and distribution of biogenic sediment deposits along these regions remains poorly documented. Seafloor surface sediments have been collected in situ via Johnson- Sea-Link I submersible along four of Florida’s deep-water regions during a joint research cruise between Harbor Branch Oceanographic Institute (HBOI) and Florida Atlantic University (FAU). Sedimentological analyses of the taxonomy, species diversity, and sedimentation dynamics reveal a complex interconnected development system of Florida’s deep-water habitats. Results disclose characteristic microfossil assemblages of planktonic foraminiferal ooze off the South West Florida Shelf, a foraminiferal-pteropod ooze through the Straits of Florida, and pteropod ooze deposits off Florida’s east coast. The distribution of the biogenic ooze deposits is attributed to factors such as oceanographic surface production, surface and bottom currents, off-bank transport, and deep-water sediment drifts. The application of micropaleontology, sedimentology, and oceanography facilitate in characterizing the sediment supply to Florida’s deep-water regions.
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Date Issued
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2017
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PURL
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http://purl.flvc.org/fau/fd/FA00004857
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Subject Headings
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Marine sediments., Sediment transport., Deep-sea ecology., Ecosystem management., Micropaleontology
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Format
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Document (PDF)
Pages