Sepulveda Basin Reserve: Bull Creek Ecological Study

 
Sepulveda Basin Reserve:
Bull Creek
 
Angel
Arturo
Nicole
Zoi
 
 
 Introduction
 
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Chi square testing : 1) species mix
                         2) native vs exotic
 
Data and Methods
 
Bull Creek
3 Main areas
15 parallel transect
10 meters
10 unique species identified; 165 samples total
Common Species
Mule fat
Purple sage
Bare ground
Exotic Species
Johnson grass
 
Problems while Transecting
 
Homeless population
Under bridges
In tents
Litter
Trash around trail
Inside
Alternative paths
Pathways carved from people walking through, but not the actual trail
 
Results
 
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Species mix analysis
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Alpha level = 0.10
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X2calc = 3.859
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X2crit = 4.605
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Prob-value = 0.145
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Effect size = 0.132
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Power = 0.528
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Natives species vs. exotic species
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Alpha level = 0.10
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X2calc = 50.118
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X2crit = 2.706
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Prob-value = 0.0
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Effect size = 0.342
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Power = 1.0
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Discussion
 
Importance of species diversity and richness
susceptibility to disease
successful ecosystem
Natives > exotics
strength and resilience of natives
Further research advised
 
 
Conclusion :
 
1st test : Null accepted
2nd  test : Null rejected
 
 Recommendations :
Further data collection by successors
Better maintenance, Trash problem and potential risks to
plants
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Sepulveda Basin Reserve: Bull Creek conducted a study focusing on riparian vegetation, with a special analysis of native vs. exotic species diversity. The research revealed challenges such as homeless populations affecting transecting efforts. Results indicated a significant impact of native species on ecosystem strength and resilience. The conclusion suggests further data collection, enhanced maintenance practices, and addressing trash issues for plant protection.

  • Ecological study
  • Species diversity
  • Riparian vegetation
  • Native species
  • Exotic species

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  1. Sepulveda Basin Reserve: Bull Creek Angel Arturo Nicole Zoi

  2. Introduction Sepulveda Basin Reserve: Bull Creek - breaking new ground Special focus on Riparian Vegetation Collection of new data vs data collected at Northern Reserve Chi square testing : 1) species mix 2) native vs exotic

  3. Data and Methods Bull Creek 3 Main areas 15 parallel transect 10 meters 10 unique species identified; 165 samples total Common Species Mule fat Purple sage Bare ground Exotic Species Johnson grass

  4. Problems while Transecting Homeless population Under bridges In tents Litter Trash around trail Inside Alternative paths Pathways carved from people walking through, but not the actual trail

  5. Results - Species mix analysis - Alpha level = 0.10 - X2calc = 3.859 - X2crit = 4.605 - Prob-value = 0.145 - Effect size = 0.132 - Power = 0.528 - Null Hypothesis Accepted - Natives species vs. exotic species - Alpha level = 0.10 - X2calc = 50.118 - X2crit = 2.706 - Prob-value = 0.0 - Effect size = 0.342 - Power = 1.0 - Null Hypothesis Rejected (effect size measure) Cram r's V Corrected power (Rodrigue) (effect size measure) Cram r's V Corrected Power (Rodrigue) X2calc 0.132 X2calc 0.342 3.859 50.118 alpha df X2crit prob alpha df X2crit prob 0.528 1 0.1 0.1 2 1 4.605 0.145 2.706 0

  6. Discussion Importance of species diversity and richness susceptibility to disease successful ecosystem Natives > exotics strength and resilience of natives Further research advised

  7. Conclusion : 1st test : Null accepted 2nd test : Null rejected Recommendations : Further data collection by successors Better maintenance, Trash problem and potential risks to plants

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