Ecological and Historical Aspects of Forest Invasion by Alliaria petiolata

Data

• hf090-01: plants 2004
• hf090-02: plants 2005
• hf090-03: temperature
• hf090-04: moisture
• hf090-05: individuals

Overview

• Lead: Kristina Stinson, Kathleen Donohue
• Investigators: David Foster
• Contact: Kristina Stinson
• Start date: 2004-01-01
• End date: ongoing
• Location: Prospect Hill Tract (Harvard Forest)
• Latitude: +42.53 to +42.55
• Longitude: -72.20 to -72.17
• Elevation: 280 to 420 meters
• Taxa: Alliaria petiolata (garlic mustard)
• Research topic: invasive, regional
• Study type: long-term measurement
• LTER core area: populations
• Keywords: invasive species, population biology
• Release date: 2009
• EML version: knb-lter-hfr.90.7
• Revisions:
• Related links:
• Invasive Species Mapping at Harvard Forest
• Abstract:

  We are investigating the role of disturbance history, source-sink metapopulation dynamics, and genetic adaptation to different canopy environments in the invasion success of Alliaria petiolata in the New England understory. In these studies, we employ a combination of population-level experiments, metapopulation studies, and landscape-level historical analyses. We have initiated a statewide survey of forested locations to determine the presence and absence of garlic mustard with respect to major pathways of invasion via past and present habitat disturbances. More explicit spatial analyses will test whether past sites of open canopy could have acted as corridors for the spread of invasive populations to present locations. This broad analysis will enable us to evaluate the generality of emerging conclusions from our population-level studies for predicting the broad-scale factors controlling the distribution, pattern and abundance of exotic species.

  At the population-level, we have begun long term demographic modeling of A. petiolata and experiments to test for habitat-specific natural selection on physiological, phenological, and allocational traits in sites with different canopy structure (edge or understory). In long term demographic analyses, we will use matrix population models to determine the relative contributions of subpopulations in different habitats to forest invasion. In ongoing reciprocal transplant studies, we will asses whether the maternal source habitat of a propagule contributes to its germination and survival in contrasting habitats.

• Methods:

  Methods include: demographic monitoring of field populations, recording plant performance, seed collection, controlled experiments using potted plants, experimental field eradications, reciprocal transplanting between sun and shade habitat, and GIS mapping of forest invasions.

• Use:

  This dataset is released to the public and may be freely downloaded. Please keep the designated Contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement. For more information on LTER Network data access and use policies, please see: http://www.lternet.edu/data/netpolicy.html.

• Citation:

  Stinson K, Donohue K. 2009. Ecological and Historical Aspects of Forest Invasion by Alliaria petiolata. Harvard Forest Data Archive: HF090.

Detailed Metadata

hf090-01: plants 2004

1. Year: year (YYYY)
2. LOCATION: name of site replicate, corresponds to nearby buildings or roads
   • BEN: Benson House
   • SHA: Shaler Hall
   • HWY: Highway House
3. TREAT.HAB: experimental growth habitat, i.e., transplant treatment habitat
   • Forest: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
4. MAT.HAB: habitat for seed sources
   • Forest: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
5. ID: tag id for individual experimental plants
6. germ rate 6.14.04: # plants out of ten planted seeds that germinated by given date (number )
7. Survival rate 6.14.04: # plants out of germinated seeds that survived by given date (number )
8. num lvS 6.11.04: # of leaves on target seedling (number )
9. Survival 7.9.04: survival of target seedling by given date (number )
10. num lvS 7.9.04: # of leaves on target seedling by given date (number )
11. height7.9.04: height from base of plant to tip of seedling by given date (centimeter )

hf090-02: plants 2005

1. Year: year (YYYY)
2. ID: tag id for individual experimental plants
3. Site: name of site replicate, corresponds to nearby buildings or roads
   • Benson: Benson House
   • Highway: Highway House
   • Shaler: Shaler Hall
4. Block: replicate sampling block ID number
5. Maternal: habitat for seed sources
   • Forest: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
6. MATALL: maternal habitat for seed sources including dead plants/empty pots
   • Forest: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
   • NOSEEDS: no seeds
7. treat.hab: experimental growth habitat, i.e., transplant treatment habitat
   • Forest: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
8. basallvs: no. of basal leaves (number )
9. laterallvs: no. of lateral leaves (lvs on branches) (number )
10. totallvs: basallvs + lateralllvs (number )
11. lfbiomass: mass of leaves collected at end of season (gram )
12. lateralbr: no. of lateral branches; usually 1 (number )
13. Julharv: julian date of senescence/harvest (DDD)
14. JulFrt: julian date of first observed fruit (DDD)
15. Roots: root mass (gram )
16. Shoots: total shoot mass (gram )
17. Siliques: total silique (fruit) mass (gram )
18. drywtseed: dry wt of 10 randomly selected seeds (gram )
19. wetwtseed: wet wt of 10 randomly selected seeds (gram )
20. numseeds: number of seeds (number )
21. avgseedwt: no. of seeds used in drwtseed sample (number )
22. dryheight: height from base to tip of dried plant (centimeter )
23. liveheight: height from base to tip of standing live plant in field (centimeter )
24. RtShtRatio: roots/shoots (dimensionless )
25. 04Lfct: number of leaves on 1st year plants (2004) (number )
26. 04germ: germination rate (2004) (dimensionless )
27. SURV05: survival of 1st to second year plants (2004-2005)
    • 1: yes
    • 0: no

hf090-03: temperature

1. date: date (YYYY-MM-DD)
2. month: month
3. yr: year (YYYY)
4. time: time (hh:mm)
5. site: name of study site replicate, corresponds to nearby buildings or roads
6. habitat: habitat
   • For: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
7. block: replicate sampling block ID number
8. temp C: temperature (celsius )

hf090-04: moisture

1. date: date (YYYY-MM-DD)
2. YR: year (YYYY)
3. time: time (hh:mm)
4. site: name of study site replicate, corresponds to nearby buildings or roads
5. habitat: habitat
   • For: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
6. block: replicate sampling block ID number
7. volt: voltage reading used to calculate soil moisture (volt )
8. mineral: percentage soil moisture (dimensionless )

hf090-05: individuals

1. Year: year (YYYY)
2. Site: name of site replicate, corresponds to nearby buildings or roads
3. Habitat: habitat
   • For: forest interior habitat
   • Int: intermediate between edge and understory habitats
   • Sun: edge/open/sunny habitat
4. Transect: A-E , tags for location of target plant within population
5. Plant: plant ID tag
6. Ht-leaf: height from base to top leaf (centimeter )
7. Ht-tip: height from base to tip of plant (centimeter )
8. # leaf-node: number of leaf nodes on the main branch (number )
9. #Imm bran: number of lateral branches (number )
10. #bran: total number of branches (number )
11. #leaf-sil: number of siliques emerging from a leaf node (number )
12. #prim sil: number of siliques on the primary stem (number )
13. #sec sil: number of siliques on the secondary stems (number )
14. #Basal Bran: number of basal branches (number )
15. #Basal sil: number of siliques on basal branches (number )
16. total siliques: total number of siliques (number )
17. Rosette?: rosette presence/absence
    • 0: rosette leaves absent
    • 1: rosette leaves present
18. Flower?: flower presence/absence
    • 0: no flowers present
    • 1: flowers present
19. MassShoot: shoot mass (gram )
20. MassRoot: root mass (gram )
21. root+shoot: derived from MassShoot and MassRoot (gram )
22. Total repro Mass: biomass of all siliques, flowers, buds at time of collection (gram )
23. Total Biomass: total biomass, derived from above (gram )
24. new repro branch: number of reproductive branches appearing late in July (2006 only) (number )
25. new siliques: number of new siliques appearing in July (2006 only) (number )
26. new flowers: number of new flowers appearing in July (2006 only) (number )