uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/ddeaf01ee56d665929141c676219f851 Allyson Degrassi https://orcid.org/0000-0002-1634-1614 Aaron Ellison https://orcid.org/0000-0003-4151-6081 Elizabeth Kennett Researcher 2023 English

Eastern Hemlocks (Tsuga canadensis) are foundation species, which are known to have a large influence on the species composition and ecosystem dynamics. The purpose of this study was to understand how rodent species richness and composition differed among different hemlock treatments consisting of intact forest, logged forest, and invaded hemlock stands in the Harvard Forest of Petersham, MA. Sherman live traps were arranged on 7x7m grids covering 0.49ha in four different hemlock treatments that were established in 2003: 1) the logged treatment, where commercial trees were removed 2) the girdled treatment, where the hemlocks were girdled using a chainsaw, thus killing the trees, and mimicking the effects of the woolly adelgid, an invasive insect 3) the hemlock control which is where hardwoods are at least 70% hemlocks, and 4) the hardwood control, where other hardwood species are dominate. Animals were marked and recaptured from June-July. Using Schnabel methods for population estimate, there appeared to be a shift in the population from more abundant Gapper’s Red-backed vole, Clethrionomys gapperi in the logged and girdled treatments to white-footed and deer mice (Peromyscus spp) in the hemlock and hardwood control plots. This shift in population may indicate that hemlocks support Peromyscus spp over voles. The species richness and overall population dynamic of these rodents surveyed may lead to a greater understanding as to the potential affect they may have on the seed dispersal in these plots and could account for many interactions between the vegetation and the animals also present.

hemlock hemlock woolly adelgid mammals populations species richness LTER controlled vocabulary populations 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=hf208 Simes Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.22 -72.21 +42.48 +42.47 215 300 meter 2012 2012 genus Blarina species brevicauda northern short-tailed shrew genus Clethrionomys species gapperi gapper's red-backed vole genus Glaucomys species volans southern flying squirrel genus Microtus species pennsylvanicus meadow vole genus Napaeozapus species insignis woodland jumping mouse genus Peromyscus species maniculatus deer mouse species leucopus white-footed mouse genus Sorex species fumeus smoky shrew species cinereus masked shrew genus Tamias species striatus eastern chipmunk 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

We set out Sherman traps in 7 by 7 grids that were spaced 10 meters apart in all eights Simes plots (Logged, Girdled, Hardwood control, and Hemlock Control). Plot 7 includes only 34 traps (rather than 49) across approximately 0.35 ha. We would check in intervals of two nights in a row, doing one block per trapping period (see trapping schedule on flash drive). We would start by setting the traps in the afternoon, and then we would go out a 4am to check the traps by walking the grids. If there was no capture we would spring the trap to shut it. If there was a capture we would take the weight of the animal, mark it, see if it was a recap or not, determined its age, sex, reproductive status, and the number of slugs in the trap. If the animal appeared to be a deer mouse or white-footed mouse we would also take an amylase sample by squirting distilled water in their mouths because the two species are almost visually indistinguishable. The amylase will be analyzed in the fall to see the exact ratios and distributions. As far as analysis we used the Schnabel method to find the estimated population size.

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. hf208-01-rodent.csv rodent data hf208-01-rodent.csv 105897 b7e3cbe31cd8d7d3e61e4e1d1d8debdf 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p20/hf208/hf208-01-rodent.csv dateset date trap set YYYY-MM-DD datecheck date trap checked YYYY-MM-DD block block ID Valley valley Ridge ridge plot plot ID Logged logged Girdled girdled Hemlock Hemlock Hardwood hardwood night night, one of 1 through 10 (integer); dummy variable night, one of 1 through 10 (integer); dummy variable moonphase moon phase Full full moon Half half moon New new moon moonface moon face, % visible (integer) dimensionless 1 whole NA missing value trap trap identification label trap identification label trap.status status of the trap upon checking SPRUNG trap was tripped, but no animal DISTURBED trap was disturbed (moved, bait removed, or cotton removed) USED trap did not capture an animal, was not sprung, but there was evidence of animal use (feces or urine) CAPTURE trap captured an animal species species code PE Peromyscus species PEMA Peromyscus maniculatus, deer mouse PELE Peromyscus leucopus, white-footed mouse NAIN Napaeozapus insignis, Woodland Jumping mouse GLVO Glaucomys volans, Southern Flying Squirrel TAST Tamias striatus, Eastern Chipmunk CLGA Clethrionomys gapperi, Gapper’s Red-backed Vole MIPE Microtus pennsylvanicus, Meadow Vole SHREW shrew species unknown SOFU Sorex fumeus, Smoky Shrew BLBR Blarina brevicauda, Northern Short-tailed Shrew SOCI Sorex cinereus, Masked shrew NA no data (trap was sprung, disturbed, or used) species.status species status ALIVE alive DEAD dead NA no data color1 marking color BK black BL blue PR purple GR green OR orange RD red NA no data (no animal or unmarked animal) color2 marking number (range: 1-20). NA: no data (no animal or animal not marked) marking number recapture recapture N no Y yes NA no data (no animal or unmarked animal) remark.color color used for marking recaptures BK black BL blue PR purple GR green NA no data (no animal or unmarked animal) age age A adult SA sub adult J juvenile NA no data (no animal or unmarked animal) sex sex F female M male NA no data (no animal or unmarked animal) rs reproductive status N non-reproductive R reproductive NA no data (no animal or unmarked animal) wt weight gram 0.1 real NA missing value slugs initial slug presence indication or number of slugs present S small number of slugs present (1-4) M medium number of slugs present (5-10) L large number of slugs present (more than 10) Y slugs present N slugs absent NA no data (presence or absence of slugs not checked) Free text (unrestricted) .* slug.presence slug presence Y slugs present N slugs absent NA no data (presence or absence of slugs not checked) amy amylase, saliva sample taken from PE, PEMA, or PELE N no Y yes NA no data (sample not needed) 1092 biodiversity community long-term measurement