uid=HFR,o=lter,dc=ecoinformatics,dc=org
all
public
read
doi:10.6073/pasta/7f051b161a9e102c93a002430691a3fc
Umbilicaria Mammulata and Nitrogen Deposition at Harvard Forest 2006
Fern
Perkins
Howard
Neufeld
2023
English
Atmospheric N has quadrupled due to anthropogenic inputs and is projected to double again by 2050. The lichen Umbilicaria mammulata relies primarily on atmospheric deposition for nutrients, including N. Much of this species’ geographic distribution coincides with the N deposition gradient in the eastern US. We were interested in the potential impacts of N deposition on this species under realistic field conditions. Lichens were collected at six sites, ranging from Maine (low deposition) to West Virginia (high deposition). Thalli were analyzed for %C, %N, C:N, specific thallus weight (a measure of thickness), chlorophyll content, and chlorophyll fluorescence. Using stepwise regression we identified the most predictive model(s) using N deposition, environmental variables, and climate to predict differences in lichen ecophysiology and biochemistry across the gradient. While N deposition was important in predicting some responses, the model that best predicted %N in lichen only included mean minimum temperature, mean annual precipitation, and substrate slope. In controlled experiments at Grandfather Mountain (Linville NC) lichens were fertilized in situ with N to mimic deposition projected for 2050. There were no significant differences between control and fertilized thalli for any response variables, but differences did exist among sites. The results of this study highlight the complexities associated with sampling along a gradient of one factor in a multivariate environment.
carbon
chlorophyll
lichens
nitrogen deposition
LTER controlled vocabulary
disturbance
human-environment
LTER core area
Harvard Forest
HFR
LTER
USA
HFR default
This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.
Creative Commons Zero v1.0 Universal
https://spdx.org/licenses/CC0-1.0.html
CC0-1.0
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf164
Simes Tract (Harvard Forest). Coordinates based on WGS84 datum.
-72.212
-72.212
+42.469
+42.469
245
245
meter
2006
2006
genus
Umbilicaria
species
mammulata
rock tripe lichen
complete
Information Manager
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
hf-im@lists.fas.harvard.edu
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
(978) 724-3595
https://harvardforest.fas.harvard.edu
Lichen thalli were collected from rock substrate using a putty knife. Thalli were collected in a manner so that their absence was not obvious (e.g. neighboring thalli were not collected). Chlorophyll was extracted in DMF.
Harvard Forest Long-Term Ecological Research
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
(978) 724-3595
https://harvardforest.fas.harvard.edu
https://ror.org/059cpzx98
pointOfContact
The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts.
National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210.
hf164-01-nitrogen.csv
nitrogen
hf164-01-nitrogen.csv
456
aaadd7904c878908bce28f0655be257c
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p16/hf164/hf164-01-nitrogen.csv
date
date
YYYY-MM
code
code
code
c
percent carbon in lichen
dimensionless
0.01
real
NA
missing value
n
percent nitrogen in lichen
dimensionless
0.01
real
NA
missing value
c.n
ratio of carbon to nitrogen in lichen
dimensionless
0.01
real
NA
missing value
fv.fm
variable divided by maximum chlorophyll fluorescence
dimensionless
0.001
real
NA
missing value
area
area of the plastiquinone pool
squareMillimeters
1
whole
NA
missing value
stw
lichen thickness
millimeter
1
whole
NA
missing value
chla.area
ug of chlorophyll a per mm^2 of lichen
microgramPerMillimeterSquared
0.001
real
NA
missing value
chla.weight
ug of chlorophyll a per mg of lichen
microgramPerMilligram
0.001
real
NA
missing value
chlb.area
ug of chlorophyll b per mm^2 of lichen
microgramPerMillimeterSquared
0.001
real
NA
missing value
chlb.weight
ug of chlorophyll b per mg of lichen
microgramPerMilligram
0.001
real
NA
missing value
chlab.area
ug of chlorophyll per mm^2 of lichen
microgramPerMillimeterSquared
0.001
real
NA
missing value
chlab.weight
ug of chlorophyll b per mg of lichen
microgramPerMilligram
0.001
real
NA
missing value
ph.chl
ratio of phaeophytin to chlorophyll in lichen
dimensionless
0.001
real
NA
missing value
4
community
short-term measurement