modeling solitary bee abundance e rica stevani, silvia lom á scolo and jimena dorado
DESCRIPTION
Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado. Study area: Villavicencio Reserve Mendoza. Solitary bee Megachile sp. Photo Nachu Chacoff. Nest traps. Larrea divaricata. Photo Beni Padron. Objective: - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/1.jpg)
Modeling solitary bee abundance
Erica Stevani, Silvia Lomáscolo and Jimena Dorado
![Page 2: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/2.jpg)
Study area: Villavicencio
Reserve
Mendoza
![Page 3: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/3.jpg)
Solitary bee Megachile sp.
Photo Nachu Chacoff
![Page 4: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/4.jpg)
Nest traps
Pho
to B
eni P
adro
n
Larrea divaricata
![Page 5: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/5.jpg)
Objective:Modeling solitary bee abundance along the
floral season in four sites in Villavicencio.
Questions:1-Does the pattern of bee abundance differ
among the sites ?– In what parameters?
2-If they differ, is the difference correlated to habitat degradation?
![Page 6: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/6.jpg)
Deterministic portion:Gaussiany= A*exp(-(x-b)^2/(2*(c^2))
Stochastic portion:Poisson distribution
Our data
mle2(ocupacion~dpois(A*exp(-(dias-b)^2/(2*(c^2)))),start=list(A=7,b=35,c=14),data=ocup.fecha06)
![Page 7: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/7.jpg)
A
b
c
Deterministic portion:Gaussiany= A*exp(-(x-b)^2/(2*(c^2))
Stochastic portion:Poisson distribution
Our data
![Page 8: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/8.jpg)
Question 1:Does the pattern of bee abundance differ
among the sites ? – In what parameters?
A, b, c, similar for all sites
A is different, b and c are similar
A is similar, b and c are different
A, b, c, different for all sites
![Page 9: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/9.jpg)
Bee abundance differs among sites
Log-likelihood = -44.87 Log-likelihood = -34.90
Likelihood Ratio Test: Chi-sq = 19.94, df = 9, p = 0.019
![Page 10: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/10.jpg)
Question 1:Does the pattern of bee abundance differ
among the sites ? YES– In what parameters?
A, b, c, similar for all sites
A is different, b and c are similar
A is similar, b and c are different
A, b, c, different for all sites
![Page 11: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/11.jpg)
Questions:1-Does the pattern of bee abundance differ
among the sites ? YES– In what parameters?
A, b, c, similar for all sites
A is different, b and c are similar
A is similar, b and c are different
A, b, c, different for all sites
ANOVA: Chi-sq = 8.28 df = 6 p = 0.218
ANOVA: Chi-sq = 7.21 df = 3 p = 0.066
In A
![Page 12: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/12.jpg)
Objective:Modeling solitary bee abundance along the
floral season in four sites in Villavicencio.
Questions:1-Does the pattern of bee abundance differ
among the sites ? YES– In what parameters? In A
2-If they differ, is the difference correlated to habitat degradation?
![Page 13: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/13.jpg)
Question 2:Is the difference among sites related to
habitat degradation?
A, b, c, similar for all sites
A is different b and c similar for pristine and degraded sites
A is different, b and c are similar
A is similar, b and c are different
A, b, c, different for all sites
![Page 14: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/14.jpg)
Disturbed and pristine sites have different pattern of bee ocupation
Log-likelihood = -39.59 Log-likelihood = -39.04
Likelihood Ratio Test: Chi-sq = 1.11, df = 2, p = 0.575
![Page 15: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/15.jpg)
Question 2:Is the difference among sites related to
habitat degradation?
A is different b and c similar for pristine and degraded sites
A is different, b and c are similar
A, b, c, similar for all sites
A is similar, b and c are different
A, b, c, different for all sites
![Page 16: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/16.jpg)
Objective:Modeling solitary bee abundance along the
floral season in four sites in Villavicencio.
Questions:1-Does the pattern of bee abundance differ
among the sites ? YES– In what parameters? In A
2-If they differ, is the difference correlated to habitat degradation? IT SEEMS TO BE
![Page 17: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/17.jpg)
General conclusions
1. The nesting pattern varies mainly in number of traps occupied, not so much in the timing.
2. The degraded sites have greater abundance of bee nests.
3. We don’t know why abundance is greater, really…
![Page 18: Modeling solitary bee abundance E rica Stevani, Silvia Lom á scolo and Jimena Dorado](https://reader036.vdocuments.us/reader036/viewer/2022062423/56814595550346895db284f6/html5/thumbnails/18.jpg)
Thanks!!