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Full-Text Articles in Biology
Using Linear Mixed Models To Analyze Native And Non-Native Species Abundances In Coastal Sage Scrub, Kaylee Anderson
Using Linear Mixed Models To Analyze Native And Non-Native Species Abundances In Coastal Sage Scrub, Kaylee Anderson
Scripps Senior Theses
Coastal Sage Scrub (CSS) is a low scrubland plant community native to the coasts of California, housing many threatened and endangered species. Due to the invasion of non-native plants, many areas of CSS have type converted to annual grasslands and the fire frequency has accelerated; fire in turn, may facilitate further invasion, leading to a loss of biodiversity. While many studies document post-fire succession in these communities, pre-fire data are rarely available for comparison, especially data on seedling emergence. I analyzed post-fire recovery of a type-converted grassland community, comparing seedling emergence data for the first and third year after fire …
The Impact Of Sea Surface Temperature On Outbreaks Of Acanthaster Planci On The Great Barrier Reef, Laura A. Grossman
The Impact Of Sea Surface Temperature On Outbreaks Of Acanthaster Planci On The Great Barrier Reef, Laura A. Grossman
Scripps Senior Theses
The causes of increasing outbreaks of Acanthaster planci on the Great Barrier Reef have been a point of hot debate in recent years. It is unknown whether the increased success is due to nutrient runoff, salinity levels, or a decrease in predation, among other possibilities. In this paper I argue that the primary influence on outbreak status is sea surface temperature. From existing literature, I demonstrate that sea surface temperature in the Great Barrier Reef has increased by 0.4°C per year over the past three decades. I attempt to tie this increase with an increase in frequency of A. planci …
Bird Use Of Lakes In The Claremont-Upland Area, Valerie Banschbach
Bird Use Of Lakes In The Claremont-Upland Area, Valerie Banschbach
Pomona Senior Theses
I studied water bird use of two lakes in the Claremont-Upland area to determine what physical, chemical, and biological aspects of these lakes provide suitable water bird habitat and food resources. I censused the Bernard Field Station Lake in Claremont and a gravel pit freshwater area in Upland from 10/85 to 3/86 for water bird use. I also mapped these sites, noted their water surface area and water depth changes, monitored their water chemistry, and censused their vegetation. The results of this work showed more total water birds per hour of observation time, and more birds per hour of observation …