uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/9d7001bf5da578016f5766b9e00223b9 Lisa George Fakhri Bazzaz 2023 English

We investigated the role of the fern understory as an ecological filter that influences the organization of the tree seedling bank in New England deciduous forests. The data files below summarize a series of field experiments conducted from 1993 to 1995 evaluating the response of seed germination and seedling growth and survival to experimental understory manipulation. These field studies involved three experimental manipulations of the fern understory: 1) removal of ferns 2) ferns tied back (to remove above-ground shading) 3) ferns left intact (control). These manipulations were established in 180 - 1m2 plots spanning six field sites and 2 different fern species (3 understory manipulations x 2 understory fern species x 6 sites x 5 replicates/site = 180 experimental plots).

ferns regeneration seed banks seedlings 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=hf051 Prospect Hill Tract (Harvard Forest), Tom Swamp Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.23 -72.17 +42.55 +42.49 230 420 meter 1993 1995 genus Acer species rubrum red maple genus Betula species alleghaniensis yellow birch species lenta black birch genus Dennstaedtia species punctilobula hayscented fern genus Fraxinus species americana white ash genus Osmunda species claytoniana interrupted fern genus Pinus species strobus white pine genus Quercus species rubra northern red oak 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

The first data file (hf051-01) contains measurements of germination of planted seeds. The second data file (hf051-02) contains measurements of germination of naturally occurring seeds. The third data file (hf051-03) contains measurements of height and biomass growth of planted seedlings. The fourth data file (hf051-04) contains microenvironmental measurements made in the various experimental plots.

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. hf051-01-germ-exp.csv germination of planted seeds hf051-01-germ-exp.csv 3638 5e50fdf25448570c6f19c2ca77d2a8af 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p05/hf051/hf051-01-germ-exp.csv site field sites are denoted by the Harvard Forest compartment number in which they are located (PH is Prospect Hill, TS is Tom Swamp) site fern fern species DEPU Dennstaedtia punctilobula OSCL Osmunda claytoniana manipulation experimental manipulations of the fern understory 1 control/fern understory intact 2 fern fronds tied back 3 fern removal plot plot number plot number bc94 number of birch (Betula alleghaniensis) germinants in plots cleared of forest floor litter, 1994 number 1 whole NA missing value bl94 number of birch germinants in plots with litter layer intact, 1994 number 1 whole NA missing value rm7.94 number of summer germinants of red maple (Acer rubrum), 1994 number 1 whole NA missing value rm5.95 number of spring germinants of red maple, 1995 number 1 whole NA missing value bc95 number of birch germinants in plots cleared of forest floor litter, 1995 number 1 whole NA missing value bl95 number of birch germinants in plots with litter layer intact, 1995 number 1 whole NA missing value oak number of red oak (Quercus rubra) seedlings emerging above litter layer number 1 whole NA missing value og1 shoot emergence of first pre-germinated red oak acorn above litter layer 0 shoot did not emerge 1 shoot emerged og2 shoot emergence of second pre-germinated red oak acorn above litter layer 0 shoot did not emerge 1 shoot emerged 108 hf051-02-germ-obs.csv germination of naturally occuring seeds hf051-02-germ-obs.csv 6895 8cd8527726d2f7a4020db73e2b078e67 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p05/hf051/hf051-02-germ-obs.csv plot plot number plot number site field sites are denoted by the Harvard Forest compartment number in which they are located (PH is Prospect Hill, TS is Tom Swamp) site fern fern species DEPU Dennstaedtia punctilobula OSCL Osmunda claytoniana manipulation experimental manipulations of the fern understory 1 control/fern understory intact 2 fern fronds tied back 3 fern removal rm94 number of red maple (Acer rubrum) seeds germinating in 1994 per 1m2 number 1 whole NA missing value ro94 number of red oak (Quercus rubra) seeds germinating in 1994 per 1m2 wa 94 - number of white ash (Fraxinus americana) seeds germinating in 1994 per 1m2 number 1 whole NA missing value wa94 number of white pine (Pinus strobus) seeds germinating in 1994 per 1m2 number 1 whole NA missing value wp94 number of white pine (Pinus strobus) seeds germinating in 1994 per 1m2 number 1 whole NA missing value yb94 number of yellow birch (Betula alleghaniensis) seeds germinating in 1994 per 1m2 number 1 whole NA missing value rm95 number of red maple seeds germinating in 1995 per 1m2 number 1 whole NA missing value wa95 number of white ash seeds germinating in 1995 per 1m2 number 1 whole NA missing value yb95 number of yellow birch seeds germinating in 1995 per 1m2 number 1 whole NA missing value rmdistance distance in meters from the experimental plot of nearest red maple canopy tree meter 0.1 real NA missing value rodistance distance in meters from the experimental plot of nearest red oak canopy tree meter 0.1 real NA missing value wadistance distance in meters from the experimental plot of nearest white ash canopy tree meter 0.1 real NA missing value wpdistance distance in meters from the experimental plot of nearest white pine canopy tree meter 0.1 real NA missing value ybdistance distance in meters from the experimental plot of nearest birch canopy tree meter 0.1 real NA missing value 120 hf051-03-growth.csv growth of planted seedlings hf051-03-growth.csv 60549 960b41dccfb19fb516942f7a3a237b5d 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p05/hf051/hf051-03-growth.csv site field sites are denoted by the Harvard Forest compartment number in which they are located (PH is Prospect Hill, TS is Tom Swamp) site fern fern species DEPU Dennstaedtia punctilobula OSCL Osmunda claytoniana manipulation experimental manipulations of the fern understory 1 control/fern understory intact 2 fern fronds tied back 3 fern removal seedlingspp seedling species birch yellow birch (Betula alleghaniensis) maple red maple (Acer rubrum) oak red oak (Quercus rubra) height93 height of seedling (cm) at 1993 planting date centimeter 0.1 real NA missing value lfbiomass93 seedling leaf biomass at 1993 planting date gram 0.001 real NA missing value stembiomass93 seedling stem biomass at 1993 planting date number 0.001 real NA missing value rootbiomass93 seedling root biomass at 1993 planting date gram 0.001 real NA missing value tbiomass93 seedling total biomass at 1993 planting date gram 0.001 real NA missing value ht95 height of seedling (cm) at 1995 planting date centimeter 0.1 real NA missing value lfbiomass95 seedling leaf biomass at 1995 harvest date gram 0.001 real NA missing value stembiomass95 seedling stem biomass at 1995 harvest date gram 0.001 real NA missing value rootbiomass95 seedling root biomass at 1995 harvest date gram 0.001 real NA missing value tbiomass95 seedling total biomass at 1995 harvest date gram 0.001 real NA missing value rgr.ht relative growth rate of experimental seedling in terms of height in cm. RGR calculated as [ln (height in 95) - ln (height in 93)]/2 yr number 0.001 real NA missing value rgr.lvs relative growth rate of experimental seedling in terms of leaf biomass in g gram 0.001 real NA missing value rgr.stems relative growth rate of experimental seedling in terms of stem biomass in g gram 0.001 real NA missing value rgr.roots relative growth rate of experimental seedling in terms of root biomass in g gram 0.001 real NA missing value rgr.tbiomass relative growth rate of experimental seedling in terms of total biomass in g gram 0.001 real NA missing value light.1m light levels measured above the understory at 1m above the forest floor molePerMeterSquaredPerDay 0.000000001 real NA missing value 540 hf051-04-microenv.csv microenvironmental measurements hf051-04-microenv.csv 5353 2f4378b010c25fae9476c24826bb3b47 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p05/hf051/hf051-04-microenv.csv plot plot name plot name site field sites are denoted by the Harvard Forest compartment number in which they are located (PH is Prospect Hill, TS is Tom Swamp) site fern fern species DEPU Dennstaedtia punctilobula OSCL Osmunda claytoniana manipulation experimental manipulations of the fern understory 1 control/fern understory intact 2 fern fronds tied back 3 fern removal light.1m light levels above the understory at 1m above the forest floor measured molePerMeterSquaredPerDay 0.01 real NA missing value light.8cm light levels below the understory canopy at 8cm above the forest floor molePerMeterSquaredPerDay 0.01 real NA missing value litter.depth depth of coarse forest floor litter centimeter 0.01 real NA missing value soil.exp number of randomly scored points (out of 10) in experimental plots under which soil was directly exposed number 1 whole NA missing value soil.mois g water per g dry soil gramsPerGram 0.01 real NA missing value org.mat g organic material per g dry soil gramsPerGram 0.01 real NA missing value 120 community short-term measurement molePerMeterSquaredPerDay