• Address:
  705 Spear Street
  South Burlington, Vermont 05403
  United States of America
  
  Phone: (802) 391-4135
  Email: femc@uvm.edu
  Website: www.uvm.edu/femc

Longterm observations of two fern species. Annual variation in fern leaf production, leaf size, spore production, and other observed characteristics. Plant observations from annual fall monitoring visit begun in the year 2000 and completed in 2019

• Label: BLOCK

• Description: Holt Forest research area major subdivisions (100m x 100m): number (south-north coordinate) + letter (north-south coordinate)

• Storage Type: text

• Measurment Type: nominal

• Label: BROKEN

• Description: Code for no leaf on plant being full length, but shortened because of breakage or insect damage below the tip of the leaf.F11. B = broken leaf.

• Storage Type: text

• Measurment Type: nominal

• Label: EATEN

• Description: Sori (with spores inside) are attacked at some point during the year, probably by insect larvae, creating a "smeared" effect on the back of leaves and occasional brown spots on the top of the leaves. Y = sori destroyed

• Storage Type: text

• Measurment Type: nominal

• Label: FERTILE

• Description: Count of the leaves on the monitored plant that had spore bearing stuctures (sorus, pl sori) on the bottom surface of the leaf

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Bounds:
• Minimum: 0
• Maximum: 16

• Label: FIM

• Description: Number of leaves on monitored plant that were fertile, but by the monitoring date (Sept/Oct) the sori were not yet mature (leaf assumed to have emerged mid-summer)

• Storage Type: int

• Measurment Type: interval
  • Bounds:
  • Minimum: 1
  • Maximum: 5

• Label: FLA

• Description: Plants were assigned an ID number when first monitored 1; a white flag marked with the number (Sharpie) was put in the ground near the plant and re-marked or replaced as needed throughout the study. Not all numbers between 1 and 849 were used to identify the 719 plants in the study.

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Bounds:
• Minimum: 1
• Maximum: 854

• Label: INSECT_LF_COUNT

• Description: Number of leaves on monitored plant with development that had been stopped by an insect (type unknown) that at some point along the rachis "rolled" the remaining developing pairs of leaflets into a "ball"; usually occurred at about leaflet pair 3 or 4 counting from the bottom, and leaflet pairs belo

• Storage Type: int

• Measurment Type: interval
  • Bounds:
  • Minimum: 1
  • Maximum: 6

• Label: LENGTH

• Description: Sum of long petiole length and lamina length measurements

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Unit: cm
• Bounds:
• Minimum: 3
• Maximum: 86

• Label: LAM

• Description: Length of the lamina of the longest leaf on plant

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Unit: cm
• Number Type: integer
• Bounds:
• Minimum: 1
• Maximum: 61

• Label: LOCATION_NOTES

• Description: Notes about plant locations printed on data sheets used for each year's monitoring: usually in relation to other flagged plants and may have changed from year to year to improve the plant location process

• Storage Type: text

• Measurment Type: nominal

• Label: PET

• Description: Length of the petiole of the longest leaf on plant

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Unit: cm
• Number Type: integer
• Bounds:
• Minimum: 1
• Maximum: 34

• Label: PROFILE

• Description: Code indicating plants in each study subquadrat that were randomly selected during the first year of the survey for extra measurements. These plants had ALL leaves measured to obtain info on the relationship between longest leaf length and mean leaf length for plants with that longest measured leaf.

• Storage Type: text

• Measurment Type: nominal

• Custom List: HRF_Profile_fld
• Code: X
• Definition: Plant selected
• Code: N
• Definition: Plant not selected

• Label: PRS

• Description: Count of pairs of leaflets (toward tip until merged into a terminal leaflet) in the lamina on longest leaf of plant; noted from the beginning of study (2000) through 2011 and again in 2019 only

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Number Type: integer
• Bounds:
• Minimum: 1
• Maximum: 21

• Label: QUAD

• Description: Holt forest major block divisions (50m x 50m), four per block

• Storage Type: int

• Measurment Type: nominal

• Label: SORAL_COUNT

• Description: Count of the number of pairs of leaflets with sori on the longest fertile leaf measured (0 = terminal only, blank = sterile leaf or data for this variable not collected)

• Storage Type: int

• Measurment Type: interval
• Number Type: integer
• Bounds:
• Minimum: 0
• Maximum: 17

• Label: SP

• Description: Abbreviation for the two species of fern monitored in this study. DI = Dryopteris intermedia and DM = Dryopteris marginalis

• Storage Type: text

• Measurment Type: nominal

• Species List: HRF_Species_fld
• • Code: DM
  • • Definition: ITIS #17541, woodfern (Dryopteris marginalis)
  • Code: DI
  • • Definition: ITIS #17538, intermediate woodfern (Dryopteris intermedia)

• Label: STATCODE

• Description: Code indicating that the plant has died, was missing or not surveyed.

• Storage Type: text

• Measurment Type: nominal

• Custom List: HRF_StatusCode_fld
• Code: NS
• Definition: not surveyed during year (2018 only)
• Code: MI5
• Definition: missed measuring plant for 5 consecutive years
• Code: MI4
• Definition: missed measuring plant for 4 consecutive years
• Code: MI3
• Definition: missed measuring plant for 3 consecutive years
• Code: MI2
• Definition: missed measuring plant for 2 consecutive years
• Code: MI1
• Definition: missed measuring plant for 1 consecutive years
• Code: G2
• Definition: gone within past two years if monitoring missed previous year (2019 only)
• Code: G1
• Definition: gone within past year
• Code: AL
• Definition: plant alive and monitored

• Label: STATYEAR

• Description: First survey year for plant (STATCODE = AL) or first survey year that plant is gone (STATCODE = G) or year that plant was missing (STCODE = MIn) though found alive in subsequent surveys

• Storage Type: date

• Measurment Type: datetime
• String Format: YYYY

• Label: STERILE

• Description: Count of the leaves on the monitored plant that did NOT have spore bearing stuctures (sorus, pl sori) on the bottom surface of the leaf (includes observations of leaflets on broken leaves as well where the tip of the leaf may have been fertile)

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Number Type: integer
• Bounds:
• Minimum: 0
• Maximum: 9

• Label: SUBQID

• Description: Assigned sequence number (1-20) for sample units (subquadrats) used in THIS study (BLOCK-QUAD-SUBQ combination (eg 1 = F321, 2 = 3F23…20 = 8C44))

• Storage Type: int

• Measurment Type: nominal

• Label: SUBQUAD

• Description: Holt forest minor block subdivisions (25m x 25m), four per block; basic "study plot" sampling area in THIS study

• Storage Type: int

• Measurment Type: nominal

• Label: TYPE_LEAF

• Description: On fertile plants where the longest leaf was not fertile, this code indicates that a sterile leaf was measured. Happens occasionally (3.6% of all lvs in study)when the sterile leaf happens to be longer, or all fertile leaves were broken. In early years (prior to 2007) the leaf type was not noted.

• Storage Type: text

• Measurment Type: nominal

• Custom List: HRF_TypeLeaf_fld
• Code: S
• Definition: sterile leaf
• Code: F
• Definition: fertile leaf

• Label: TYPE_PLANT

• Description: In the monitoring year, the plant has produced one or more fertile (spore-bearing) leaves or is sterile, having produced only photosynthetic leaves

• Storage Type: text

• Measurment Type: nominal

• Custom List: HRF_TypePlant_fld
• Code: F
• Definition: fertile plant
• Code: S
• Definition: sterile plant

• Label: VCROWN

• Description: Code used in later years to describe plants with 4 or more leaves for which the leaves formed a complete circle, suggesting that all croziers had successfully emerged and matured; these plants were therefore capable of maximum leaf litter accumulation

• Storage Type: text

• Measurment Type: nominal

• Custom List: HRF_VCrown_fld
• Code: V
• Definition: fully vase-shaped

• Label: WID

• Description: Width of lamina at about midpoint for the longest leaf on plant

• Storage Type: int

• Measurment Type: interval
• Precision: 1
• Unit: cm
• Number Type: integer
• Bounds:
• Minimum: 1
• Maximum: 41

• Label: YEAR

• Description: Year during which fall monitoring took place

• Storage Type: date

• Measurment Type: datetime
• String Format: YYYY