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Full-Text Articles in Life Sciences
Stomatal Conductance Of Malosma Laurina In Frequently Burned And Non-Frequently Burned Sites, Kamron A. King, Matthew T. Bender, Stephen D. Davis
Stomatal Conductance Of Malosma Laurina In Frequently Burned And Non-Frequently Burned Sites, Kamron A. King, Matthew T. Bender, Stephen D. Davis
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In the months following the Malibu fires, the fire zones have experienced and abundance of new growth. Among this new growth, there are differences that can be observed when comparing the top of the Malibu hill (frequent fire zone) to the base of the hill (nonfrequent fire zone). As the chaparral resprouted we noticed the behavior of the Malosma laurina in both frequent and non-frequent fire zones and stomatal conductance, height, and water potential were tested for plants in the two varying zones, with plants in the non-frequent fire zone outperforming their counterparts.
Soil Moisture Adjacent The Roots Of Post-Fire Ceanothus Megacarpus And Malosma Laurina, Kristi Holly, Kelly Sayre, Anson Snow
Soil Moisture Adjacent The Roots Of Post-Fire Ceanothus Megacarpus And Malosma Laurina, Kristi Holly, Kelly Sayre, Anson Snow
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Hydraulic lift is a passive process in which a plant will bring water from subsoil to topsoil levels through its roots. In this experiment, we compared the soil moisture levels in the area surrounding two different chaparral species C. megacarpus, a shallow rooted nonsprouter, and M. laurina, a deep-rooted obligate sprouter, in order to determine the hydraulic lift patterns of chaparral as they regrow after fire. Furthermore, the C. Megacarpus had died due to the Malibu fire, while the M. Laurina was resprouting. Therefore, using a Hydrosense Soil Water Measurement System, we measured soil moisture percentages, and the results showed …
The Effect Of Fire Frequency On The Presence Of Native And Nonnative Species In The Santa Monica Mountains, Bobby Boss, Simone Ross, Taryn Thompson
The Effect Of Fire Frequency On The Presence Of Native And Nonnative Species In The Santa Monica Mountains, Bobby Boss, Simone Ross, Taryn Thompson
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We surveyed two sites in the Santa Monica Mountains of Southern California that experienced both high and low fire frequency (Figure 1). Our objective was to find out if increased fire frequency allowed for the invasion of non-native species. We collected data on herbaceous coverage and point to plant distance of woody chaparral species. A series of random points were used, and each area was divided up into four equal quadrants using two meter sticks. The individual nearest to the center in each quadrant was then identified and measured. To measure herbaceous coverage, percentages were took of cover of each …
Physiological Performance In Full-Sun Vs. Shaded Post-Fire Malosma Laurina Seedlings, Lindsey A. Murphy, David C. Valencia, Catherine D. Drummond
Physiological Performance In Full-Sun Vs. Shaded Post-Fire Malosma Laurina Seedlings, Lindsey A. Murphy, David C. Valencia, Catherine D. Drummond
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Post-fire Malosma laurina regenerates both by resprouting and by disseminating seeds. The objective of this study is to assess seedling performance either in full-sunlight or in artificially shaded treatments. By identifying under which conditions Malosma laurina seedlings grow more effectively, one can predict where post-fire M. laurina seedling communities will thrive. The methodology employed throughout this experiment began by covering existing seedlings with shade cloth held by wooden stakes. These treatments were adjacent to full-sun environments; each of which contained at least two Malosma laurina seedlings. Six experimental sites were set up, and the seedlings in question were monitored for …
Comparison Of Post-Fire Growth Rates Between Elymus Condensatus And Yucca Whipplei In Coastal Chaparral, Jae K. Chung, Andrew J. Ishibashi, Francisco B. Sapigao
Comparison Of Post-Fire Growth Rates Between Elymus Condensatus And Yucca Whipplei In Coastal Chaparral, Jae K. Chung, Andrew J. Ishibashi, Francisco B. Sapigao
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The two monocot species, Yucca whippelei and Elymus condensata chosen for this study are two co-occurring species on the Pepperdine campus. We chose 6 samples of each species and looked at parameters that would allow us to compare their post fire growth rates. These parameters included leaf area index, internal CO2 levels, transpiration rate, and photosynthetic rate. We used the Students T-test on the means of each parameter and found significant differences in leaf area index, internal CO2 levels, and transpiration rate. All of these were greater in the Yucca except for the leaf area index. We concluded that, because …
Growth Sequence Of Post-Fire Chaparral Resprouts In California’S Santa Monica Mountains, Iolana N. Kaneakua, Kelly L. Reynolds, Luke S. Walsh
Growth Sequence Of Post-Fire Chaparral Resprouts In California’S Santa Monica Mountains, Iolana N. Kaneakua, Kelly L. Reynolds, Luke S. Walsh
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The post-fire resprout succession of California Chaparral was surveyed in Corral Canyon of the Santa Monica Mountains. The primary objective of this investigation was to determine the sequence of Chaparral post-fire resprouts and possible correlations to the life histories of those species. Over a three month period, four designated study sites were visited every two weeks, surveying the number of adults, the number of resprouts and the height of the resprouts. It was found that both the facultative and the obligate typed species were successful in post-fire resprout. Facultative species were the first to resprout and obligate species displayed the …
Effects Of Shading On Post-Fire Seedlings Of Laurel Sumac (Malosma Laurina) In The Santa Monica Mountains, Anastasia N. Fry, Jennifer A. Sledge, Drew A. Almodovar
Effects Of Shading On Post-Fire Seedlings Of Laurel Sumac (Malosma Laurina) In The Santa Monica Mountains, Anastasia N. Fry, Jennifer A. Sledge, Drew A. Almodovar
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The interactions between post-fire plants is crucial directly after fire. A recent fire on Pepperdine campus allowed for a study to be performed on these interactions. The dominant chapparal plant, Malosma lauraina, laural sumac, both re-sprouts and grows from seeds after fire. Marah Macrocarpus, wild cucumber, grows rapidly after rain following a fire. Some M. lauraina seedlings end up under the M. Macrocarpus yet survive. This study aimed to find differences between those seedlings interacting with M. Macrocarpus and those that are not. Three groups of specimen were used. One control group grew in the sun, one control group in …