Download Scan Jun 7, 2020

l
\-r'\,fe ( ~0
Name
Lab Section
,
,,
Q 0 .,\ /l , \ (\
<-\
Exercise 13 Worksheet
Population Size Estimates (Activity 2)
Go to the follOWing website for a virtual mark-recapture simulation (address also linked in the lab
P0Werpoint):
http ://virtualbiologylab.org/NetWebHTML FilesJan2016/PopulationEstimationModel.html
1. Choose the following settings:
Pond size: Medium
Population size: Large
Net size: Medium
2 . Click the button that says "Setup", then click "Go"
3 . Click the button that-.ay& "Dip Net" to take your first sample. Below the tank, you will see
"Total in Bucket" - that is the number of fish you caught during this first sampling ewnt. (MJ
Record this value in the table below.
4. Click the button that says "Mark" until all of the fish in your buoket are marked. (The box that
says "Marked fn Bucket" should match "Total in Bucket")
5. Click the button that says "Release" and let your fish mix into the population for at least 10
seconds.
6 . Click the button that says "Dip Net" to take your second sample. How many in this sample
are marked? (Look at the box that says "Marked in Bucket"). This is your M,. Record this value
in the table below. How many in this sample are unmarked? (You'll need to subtract "Marked in
Buckel" from "Total in Bucket"). This is yourtJ0 • Record this value in the table below.
7 . CalaJlate your estimated poi,ulation size using the formula from your lab manual (SHOW
YOURWORKI)
8. Repeat steps 2 - 7 after changing your settings to "Net size: Large"
Larae Net
Medium Net
Number of Fish Marked
and Released (MJ
Number of Marked Fish
Captured (M,)
Number of Unmarked Fish
Captured (UJ
Estimated Population Size
(N)
G'i
JL\
\)
I
s,
_1)1
c:, "l
3\S -0 ~
lo
Show your work for your population size estimation calculations here:
N =- \ \H. vt- -1-,-\~ ~ 1.-r
\ ,'\~ l I , ,, \
;_i. ). '-\ (J._:;,~ 1/ \
: . J_ .t-\
"-.J
e,-;.• G; ,
-.. S-'l lr / 1
c- S1 t.?
\J-o LL\ ( S\-'1-\3')/\:,
bt-\L 0'4)/\ ~
Tro h"
Ch P •c Structure and Food Webs (Activity 1)
w oose one oft~~ communities from your lab manual (page 180 - marsh, desert, ~emperate
nd , ~r pra~ne) and draw the food web for that community belo~. You must mdude all
0
Plganisms hsted m your lab manual. Use arrows to indicate the direction offood I energy flow.
peas~ not_
e that most organisms should have more than one arrow going to and/or from it.
araSrtes hke mosquitoes and ticks should be connected to any organism on which they feed or
suck blOOd. Once your food web is complete, use it to answer the questions on the next page.
;xx11~
""r
.,
At..
..I
....
..... t--
., >
A
Jj
----....
I
I
-
"'
..,,ry
'1
\
~rq
'
'\
I
-v
1
\
t>l
~·
"\
"-
"')
\~
\\
hu,
1J1~
/\
tl1>~~i
Using your food web on the previous page, answer the following questions:
1· Wflat would happen if one of the plant species went extinct?
r ..n\1.J...""'0 v-' t..,,
(l\\ -\-1"-Q, o .)\ \-N. W'\¼,1.,0 S\NJ... e. r N.>A ~_,v-, c.'
1\-\1 \',tr\•.( ( \ ) o-v-.0 f''~ (l.. V\.-.he i\ \) yv\® •o LJ.,f' \>-vt'\t l °) (_\.,,-,.c,\ -1., 1\<
, _. \ ., ( • -\V\..L ~'.)-..)"i\ l{~,
t
\....
w()..\c\
e,_\\u~
I
,
2. What would happen if one cl the insect species went extinct?
1 l\.V\ 1n ) ll.k 'Mi"\""" C. X-h l\L.-'I "'\\ J , 1. l-\"t\c• •~ 1 1 1
1
+"C.-1(, \') t 1.h ,) u ~"\( I ~ l\)u'-\t\ ) \l( '- [tl-L-\ ~0. ,
"l> •-:'.) ,
/,'{'4'.~
3. What would happen if one cl the upper level predator species ·went extinct?
~ 'fl. ~ ~
S~f5 \,\)..\,\
g)
)","..,\l
YJ'f-{,' \ (/..•(\l'
\.i '\ .J I\..
(i_¥)J,>(.IC,t\cl·
4. What would happen if the decomposers went extinct?
\ \-
ch-w 'tl'\va'j,,c,
::;l' i.v., ')l
.l;k
wt,>'\\ Q)(\~nc\
y~\v U-J(j
w1>.\.\ l\•.Y
\-hL
w'NM. l,:,oc\
VJt\:}
v..J,Jv\J
(o\\~SL.
'Oc_c,.'OJ-_ -\1) \ '\OM. \"'-'--'('.,'Th.L"-1) \ f\.l,-1(\l.
6.)\J,,,\'I{,\ I
5. How many species in your food web would be impacted by the change in abundance of just
one species?
\ \--\~Ou),\_
¥ (ft) l_uu\.\t\
C. 10,
~"I' II"
\u¥
Q.Y-~1' LJr
' '(6-{,-ltt\ ( "6'
~tJ,,~\
5'-fe.ut:0.
'ff\ \,J l{,., ,\''r\c,. \"\
I\~\\, -\\u,
Community Variation (Activity 3)
Use the photos on the PowerPoint slides and Table 13.<4 to answer the following questions.
Bi~ilrersjty Comparison #1
~•ch fungus community has the greatest biodiversity? Explain your answer using the terms
nchness· and ·evenness·.
C.,t, ,\Y\\'-'' '½
6\-
l'\vVV\\-x.,{'
.l.-Y\L
'¢ Y\t. ')
~ f Qij..1 f
l'.i Jd. >IC\ ~ ,~
::.,11,t.._ , ..
hu._::i o.... \\, ~"r-.tY
~«."1LJ (_fi ~ MY>) a-.v0 'MOn. C,..0)()0-0-.V\l,Q.(VJ-e.r\\'\J. )~' )
Biodiversjty Comparison #2
Which forest community has the greatest biodiversity? Explain your answer.
w-s'1"
Cow,n'\,1..,1,\t\\ . A l\(>..:) -\-Y\L ~n.0•\L \-:)\ 001
YlJ...lOJft... \\
\Y\ \J
Y\,\\-\ ½t \ - (), S~ .('.< L .::_, C>-1\ (,\ Q,V Ln \-\f._::, ') ct, 1 h._o~
\ \ (,l ')
_
~
I
Biodiversity Comparison #3
Which community has the greatest biodiversity within the circular plot? Explain your answer.
P. QLo>.,~ .-\-Y'\Ue. \S m uvt
\-\.L lA ...-c.,\t. .
();,.,.,
i>' ,\ r-- i Y'\
(J. 'ovV\ O.[).JM.L
C.1 \..
\-\1).J.XO
In general, would resources be utilized most completely in a community with few species but
roughly equal numbers of individuals or in a community with lots of species but strongly
dominated by one? Why?
t-\u'{C.
f" .LllMU)
M ~ •r'\G,-'tt.<,\
Sytl:1 Q
Cl,.V\
Yll..h\ \-4-
C>~
WJ,.,\:d. 'n,__
bluw~
ON..
\LW -h,
0..<:fX-(b
v\; \ \ '(.C,\ 1'r\ o_:
l\.O\J\"'Q
c,..
'f\ l,\,,. t,,.l'M'f'M;V\ \~
-v t"'(,
60 '1'cW~" C,(,.A--t"'
T\u/ \ ~-.JV\\ 1r'\o-,1I~ ~ 9-U-1 W (J{ 0... Cll.Lf l{J.,'1-... \ V'\ --\ '(\J...
0-.""0 ~
a._vQ.,\ ci.tJ(L f w t)JiUS •
. ).,
C.C,..V")
lt,cµ\
0... du.t tl\.~
\Y\
,