temporal variation in leaf litter invertebrates available to · invertebrates and p. cinereus...

Temporal Variation in Leaf Litter

Invertebrates Available to

Plethodon cinereusZachary Barker

Dr. Tanya Matlaga & Dr. Carlos Iudica

Plethodon cinereus

Slender woodland salamander

Lungless salamander

Ash color with red/orange stripe middorsal (can exhibit a lead phase)

Males

42.3mm SVL and 83mm ToL (average)

Females

44mm SVL and 83mm ToL (average)

(Hulse et al. 2001)

Life History

Activity

Live under rocks, logs, leaf litter, small burrows (Frisbie and Wyman, 1991)

10% active on surface(Taub, 1961)

Approx. 1 animal/m2(Heatwole, 1962)

Development

Terrestrial

Direct Development (Burger, 1935)

Lifespan

Plethodontid salamanders- 32 years (Hairston, 1983)

P. jordani- 9.8 years (Hairston, 1983)

Laura Blackburn, Priya Nanjappa, and Michael J. Lannoo (2001) US Amphibian Dist. Maps (http://home.bsu.edu/home/00mjlannoo/)

Why Study P. cinereus? Important components to the

trophic structure in some

forests (Burton and Likens,1975)

High efficiency in converting

consumed energy to

biomass (60%) (Burton and Likens,1975)

May equal the amount of

biomass of mice and shrews (Burton and Likens,1975)

Common species, easy to

find and study

They can be marked to

identify individuals

Why Study Invertebrates?

P. cinereus prey on several different types

of invertebrates:

Termites, flies, earthworms, spiders,

springtails and more (Cockran, 1911)

Give insight to P. cinereus activity

General knowledge of species to species

relationships

Questions to be AnsweredDoes diversity of leaf litter invertebrates available

to P. cinereus differ temporally though the year?

What is the phenology of invertebrate diversity?

Does moisture content play a role in activity?

Does the abundance of invertebrates have a

relationship with abundance of salamanders?

Hypothesis When P. cinereus are more active, the invertebrate diversity

will be lower

Predictions

Invertebrate diversity will fluctuate due to phenology

Depending on leaf litter moisture content, we expect to see a

difference in the number of invertebrates

Site Description Camp Karoondinha

Eastern deciduous forest

3 Sites with 3 plots each

Each plot, 50 cover boards

councils.scouting.org

Image from Google Maps

Methodology: P. cinereus

Collect salamanders

Determine if it has

been marked

If so: recapture

If not: new capture

Measure SVL & ToL

Determine sex

Count eggs

Mark with VIE (visible

implant elastomer)

under each limb

Abiotic Measurements

Air and soil temp

Methodology: Invertebrates Field Sampling

Random sampling

20cm x 20cm samples

3 samples per plot (n=27)

Collect down to organic layer of soil

20cm

20cm

Methodology: Invertebrates Berlese Funnel Methods

Weigh samples

3 times (Wet, Dry 1, Dry 2)

In funnel for one week

Collect invertebrate

samples in alcohol

Methodology: Invertebrates Analysis and Quantification of Invertebrates

Using a dissecting scope

Identify to taxonomic order

Quantity

Analysis- Summary of Data 9 plots (3 in each of 3 sites)

Multiple sampling dates:

6 in spring, 6 in fall

Biotic measures:

salamander activity (number found/plot)

Invertebrate diversity (per plot)

Abiotic measures:

Leaf litter moisture, air temperature, soil temperature




Biotic measures:



Abiotic measures:


Shannon –Wiener Index

of Diversity: species

richness and the

proportion of each

species




Biotic measures:



Abiotic measures:




richness and the

proportion of each

species

Correlation Coefficients:

strength of the

relationship between

invertebrates and P.

cinereus activity




Biotic measures:



Abiotic measures:




richness and the

proportion of each

species

Correlation Coefficients:

strength of the

relationship between

invertebrates and P.

cinereus activity

Analysis of Variance

(ANOVA): how

invertebrate diversity

varies by site and

sampling date

Preliminary Results Diversity and Abundances of

Invertebrates

Oribatida (mites) Collembola (springtials) Mesostigmatida (mites)

Trombidiformes (mites) Opilioacarida (mites) Araneida (spiders)

Diplopoda (millipedes) Chilopoda (centipede) Hymenoptera

Diptera (flies) Pseudoscorpionida Larvae

Unidentified

http://people.stfx.ca/btaylor/Biology%20

474/Images/Animals/mesostigmatid%2

0mites%20good%202.jpg

http://www.pbase.com/tmurray74/image/152315738

4/2 4/17 5/7 9/12 9/24 10/7

3,000.00

2,000.00

1,000.00

0.00

Sample Site CHCO

ECO

Sampling Date

Mean N

um

ber

of In

vert

ebra

tes

Number of Salamanders

Num

ber

of

Invert

ebra

tes

Sample Site

4/2 4/17 5/7 9/12 9/24 10/7

Sampling DateAvera

ge N

um

ber

of

Invert

ebra

tes p

er

g o

f D

ry L

eaf

Litte

rSample Site

Sample Site

Sampling Date

Mean N

um

ber

of In

vert

ebra

tes

4/2 4/17 5/7 9/12 9/24 10/7

Sampling Date

Sample Site

Estim

ate

d M

arg

inal M

eans

51%47%

0%2%1%0%0%0%0%0%0%0%0%0%0%0%

ECO April 2, 2014

Acari (mites)

Collembola

Pseudoscorpionida

Araneae

Hemiptera

Hymenoptera

Coleoptera

Diptera

Class Diplopoda

Class Chilopoda

Opilioacarida

Larvae

Snail

Unidentifiable

Thysanoptera (thrip)

Class Pauropoda

Psocoptera (psocids)

Blattodea

Haplotaxida

Orthoptera

87%

12% 0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%

ECO May 7, 2014

Acari (mites)

Collembola

Pseudoscorpionida

Araneae

Hemiptera

Hymenoptera

Coleoptera

Diptera

Class Diplopoda

Class Chilopoda

Opilioacarida

Larvae

Snail

Unidentifiable


Class Pauropoda


Blattodea

Haplotaxida

Orthoptera

90%

9% 0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%

ECO September 24, 2014

Acari (mites)

Collembola

Pseudoscorpionida

Araneae

Hemiptera

Hymenoptera

Coleoptera

Diptera

Class Diplopoda

Class Chilopoda

Opilioacarida

Larvae

Snail

Unidentifiable


Class Pauropoda


Blattodea

Haplotaxida

Orthoptera

Questions and Acknowledgments Penn State University

Dr. David Miller

David Munez

Susquehanna University Biology Department and Facilities

Camp Karoondinha

temporal variation in leaf litter invertebrates available to · invertebrates and p. cinereus...

Documents