Browsing by Author "Roelke, Daniel"
Now showing items 1-19 of 19
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Davis, Stephen Louis (2014-03-25)Prymnesium parvum (golden algae) is a harmful algal bloom species that has caused tens of millions of dollars in natural resource damages in Texas as a result of massive fish kills. This species is present in many Texas ...
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Shen, Xiao (2017-12-11)As transition zones between river and ocean, estuaries face increasing pressure on their ecosystem health due to changes of freshwater quantity and quality – especially under the impacts of population growth, land use/land ...
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Roelke, Daniel; Augustine, Sarah; Buyukates, Yesim (Texas Water Resources Institute, 2003-12)Foodweb interactions, such as competition for limiting resources, are inherently non-linear. Consequently, they can give rise to chaotic, or undeterminable, population dynamics. Population dynamics are not always ...
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Steichen, Jamie L (2013-01-15)With steady growth in global commerce and intensified ship traffic worldwide, comes the increased risk of invasion by non-indigenous organisms. Annually, >7000 vessels traveled across Galveston Bay, Texas from 2005-2010. ...
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Lee, Hannah Alyssa (2017-05-09)With climate change, future storm frequencies and intensities and El Niño events are expected to increase. These have the potential to cause flooding within the Galveston Bay (Texas) watershed as well as other locations. ...
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Rose, Emily (2016-06-17)Species in which sexual selection acts more strongly on females than on males provide interesting opportunities to study the evolution of sex roles and sex differences and the impact of exposure to endocrine disruptors. ...
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Knight, Trevor J. (2010-01-16)Aquatic vegetation management and fisheries management are inseparable, however conflicts are often perceived between the two. We investigated the impact of biological, chemical, and no vegetation control on the ecology ...
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Montoya Ceballos, Jose Vicente (2009-05-15)In this study, I examined the influence of hydrological seasonality on spatiotemporal variation of algal biomass and shrimp abundance on sandbanks of the Cinaruco River in southwestern Venezuela. Seasonal variations of ...
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Harris, B.L.; Roelke, Daniel; Grover, James; Brooks, Bryan (Texas Water Resources Institute, 2010-10)A team of Texas AgriLife Research, Baylor University and University of Texas at Arlington researchers studied the biology and ecology of Prymnesium parvum (golden algae) in Texas lakes using a three-fold approach that ...
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Buyukates, Yesim; Roelke, Daniel (Texas Water Resources Institute, 2005)Environmental disturbances in aquatic systems alter phytoplankton community structure, diversity and biomass (Hutchinson, 1961). For example, laboratory experiments and field studies have shown that episodic flushing and ...
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Bloomer, Tymon Daniel (2017-05-10)The harmful algal species Prymnesium parvum, also known as golden algae, is toxic to many forms of aquatic life. When it blooms it kills fish and other aquatic organisms and can have long-lasting impacts on the ecosystem ...
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Hewitt, Natalie Case (2012-07-16)Harmful algal blooms' global amplification has driven research on growth characteristics and instigating mechanisms. These blooms prosper under diverse environmental conditions, creating challenges identifying bloom ...
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Weaver, Carolyn Ann (2016-03-02)Over the past two centuries, woody vegetation has expanded globally in coverage, often encroaching into grasslands, including coastal habitats. Mangroves are tropical trees which are susceptible to freezing temperatures. ...
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Sandoval, Christopher Enrique (2017-08-07)The Trinity River is a historically polluted river with records of various contaminants including organochlorine pesticides and their metabolites (OCPs), polychlorinated biphenyls (PCBs), and Mercury (Hg) detected in ...
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Salazar, Alicia (Texas A&M University, 2005-02-17)Satellite images of chlorophyll concentration in the surface waters of the Gulf of Mexico suggest a high degree of heterogeneity in the phytoplankton biomass. The causes of this variability and the amount of variability ...
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Lucchese, Allyson Elizabeth Burgess (2017-05-09)Increased freshwater use in estuarine watersheds is a concern for productivity downstream in ecologically and economically important estuaries worldwide. In Galveston Bay (TX), the seventh largest estuary in the United ...
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Hebert, Elizabeth Michele (Texas A&M University, 2005-08-29)The contribution of phytoplankton productivity to higher trophic levels in salt marshes is not well understood. My study furthers our understanding of possible mechanisms controlling phytoplankton productivity, abundance, ...
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Neisch, Michael (2014-01-15)This thesis consists of two separate experiments on unique biological threats to Texas freshwater ecosystems. The first experiment sought to understand the interaction between the harmful alga Prymnesium parvum and the ...
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Armos, Bailey Marie (2023-06-08)The northern Gulf of Mexico (nGoM) is the destination of over 50 rivers, which are highly influenced by humans and includes the Mississippi River, the largest river in the US. This project identified long-term regional ...