Today we welcomed goats to Hjelm. They are already hard at work eating their way through the foliage. Keep up the good work, goats! Most of the humans worked on finishing searching for Stipa in p01 and started planting a new production garden to generate seed to add to the experimental plots. Ian and Liam valiantly continued staking points for the pollinator emergence study. Wyatt and Abby are getting ready to begin a study investigating the effects of fire on pollen and nectar production in Echinacea angustifolia. This project has many excellent collaborators and is part of the MN ENTRF funded research on prescribed fire and ground nesting bees.
Every year since 1996, Team Echinacea members record flowering phenology, taking measuring data and harvest heads of thousands of Echinacea angustifolia plants in common garden experiments. These experimental plots are prairie restorations and abandoned agriculture fields that are managed as grassland habitat. Some plots have multiple ongoing experiments within. Currently, the Echinacea Project currently has 10 established experimental plots.
This project status report will contain updates on experimental plots 1, 2, 4, 5 and 8, as well as management updates for all plots. Specific reports for the remaining experimental plots can be found on separate posts including Amy Dykstra’s plot (exPt03), the hybrid plots (exPt06, exPt07, exPt09), and the West Central Area common garden (exPt10).
exPt01: Experimental plot 1 was first planted in 1996 (cleverly termed the 1996 cohort), and has been planted with nine other experiments in subsequent years, with the most recent planting being Amy Waananen’s inter-remnant crosses. It is the largest of the experimental plots, with over 10,000 planted positions; experiments in the plot include testing fitness differences between remnants (1996, 1997, 1999), quantifying effects of inbreeding (inb1, inb2), and assessing quantitative genetic variation (qgen1). There are also a number of smaller experiments in it, including fitness of Hesperostipa spartea, aphid addition and exclusion, and pollen addition and exclusion (the last experiment was continued the summer of 2023 and will have separate update posts). In 2023, we visited 3,699 of the 10,992 positions planted and found 3,118 alive. 560 plants were classified as “flowering” in exPt01 this year. This is a little less than half of the plants that flowered in summer 2022 (1,111) – an interesting note considering exPt01 was burned the spring of both 2022 and 2023. In summer 2023, we harvested 796 total Echinacea heads in exPt01. We also added 270 additional staples to the experimental plot this year, signifying positions were a living plant has not been found for over three years.
Some numbers for experiments within exPt01
Inb1: The INB1 experiment investigates the relationship between inbreeding level and fitness in Echinacea angustifolia. Each plant in experiment INB1 originates from one of three cross types, depending on the relatedness of the parents: between maternal half siblings; between plants from the same remnant, but not sharing a maternal or paternal parent; and between individuals from different remnants. All individuals were planted in 2001. We continued to measure fitness and flowering phenology in these plants. In 2023, of the original 557 plants in INB1, 85 were still alive. Of the plants that were alive this year, 24 of them were flowering; this count is down from summer of 2022 where 40 of the plants were flowering.
qgen: The qGen1 (quantitative genetics) experiment in p1 was designed to quantify the heritability of traits in Echinacea angustifolia. We are especially interested in Darwinian fitness. Could fitness be heritable? During the summer of 2002 we crossed plants from the 1996 & 1997 cohorts of exPt01. We harvested heads, dissected achenes, and germinated seeds over the winter. In the spring of 2003 we planted the resulting 4468 seedlings (this great number gave rise to this experiment’s nickname “big batch”). 1,417 plants in qGen1 were alive in 2023. Of those plants, 298 flowered this summer.
Other plots:
exPt02: To examine the role flowering phenology plays in the reproduction of Echinacea angustifolia, Jennifer Ison planted this plot in 2006 with 3,961 individuals selected for extreme (early or late) flowering timing, or phenology. Using this phenological data, we explore how flowering phenology influences reproductive fitness and estimate the heritability of flowering time in E. angustifolia. In the summer of 2023, we visited 1,855 positions of the 3,961 positions originally planted. We measured 1,283 living plants, of which 118 were flowering, with a total of 148 flowering heads. In the fall, we harvested 67 heads from exPt02. The large difference between the number of heads and the number harvested has to do with high levels of seed predation, mainly by ground squirrels. Last year, Will, Jennifer, and other members of Team Echinacea published a paper in the American Journal of Botany using data from exPt02 – check it out here! Location: Hegg Lake WMA
exPt04: Experimental plot 4 was planted to gauge whether Echinacea from small remnant populations could be genetically rescued via an outcross to larger, more genetically diverse populations. Caroline Ridley and other members planted this plot in 2008. We did not visit exPt04 this year. Location: Hegg Lake WMA
exPt05: The only experimental plot planted at Staffanson Prairie Preserve (SPP), exPt05, was planted to compare progeny of maternal plants from burned and unburned sections of SPP. There were 2800 plants planted originally, but high mortality made it impractical to visit the plot row-by-row. Now, we and treat the plot like demography. We use our survey-grade GPS to find plants in exPt05 that have previously flowered and add more plants to the stake file if new plants in the plot flower. In 2023 we found 11 living plants, none of which were flowering! We did locate one new flowering plant within the plot boundaries. Location: Staffanson Prairie Preserve
exPt08: Team Echinacea established quantitative genetics experiments to quantify additive genetic variance of fitness in Echinacea, with the idea that we can estimate evolutionary potential of study populations. The maternal parents of qGen2 and qGen3 are plants in the 1996, 1997, and 1999 cohorts. These plants were crossed with pollen from plants in remnants to produce seed for qGen2 and qGen3, which now inhabit exPt08. Originally, 12,813 seeds were sown in the common garden. Seeds from the same cross (shared maternal and paternal plants) were sown in meter-long segments between nails. A total of 3,253 seedlings were originally found, but only 385 plants were found alive in 2023. There were 15 flowering plants in 2023, and 15 heads. On a side note, one additional flowering plant was found in t-plot, and we harvested three heads from that. Location: Wagenius property
Experimental plot management:
Burned exPt01 (3 May 2023) and exPt08 (17 May 2023)
Replanted pedicularis in exPt01 and exPt10, augmenting Drake’s experimental treatments (replaced ones that died)
Broadcast seed in p8 after the spring burn and in the fall, including Comandra umbellata
Stuart trimmed flowering A. gerardii and S. nutans just north of tplot
Some plots in hegg (not exPt02) got run over by heavy machinery
We did not:
Treat sumac
Weed in exPt01 (except hawkweed)
Treat ash in exPt08, but we noticed that ash south of plot responded favorably to last year’s treatment
Details
Start year: Differs between experiment, see above. First ever experimental plot was in 1996.
Location: Differs between experiment, see above.
Overlaps with: …everything!
Data collected: Raw measuring data can be found in cgData repository. Processed data will be uploaded to SQL database. Currently, SQL database has measuring data up until 2022.
Samples or specimens collected: See above for total harvested heads in each plot.
Products: Many publications and independent projects.
Since 1996, members of Team Echinacea have walked, crawled, and ~sometimes~ run next to rows of Echinacea angustifolia planted in common garden experiments. Although protocol varies depending on the experimental plot, every year team members record flowering phenology data, measuring data, and harvest the heads of the thousands of plants we have in common garden experiments.
Note that these experiments are not really gardens. “Common garden” refers to the experimental design. Most of our experimental plots are prairie restorations, a few are abandoned ag fields that are manged as grassland habitat. Some plots have multiple experiments within. The Echinacea Project currently has 10 established experimental plots:
exPts01-10. To avoid repetitiveness of reports on yearly phenology, measuring, and harvesting, this project status report will include updates on all experimental plots 1, 4, 5, and 8. Reports for the others will be elsewhere: Jennifer’s plot (exPt02) Amy Dykstra’s plot (exPt03), the hybrid plots (exPt06, exPt07, exPt09), and the West Central Area common garden (exPt10).
exPt01: Experimental plot 1 was first planted in 1996 (cleverly termed the 1996 cohort), and has been planted with nine other experiments in subsequent years, with the most recent planting being Amy Waananen’s inter-remnant crosses. It is the largest of the experimental plots, with over 10,000 planted positions; experiments in the plot include testing fitness differences between remnants (1996, 1997, 1999), quantifying effects of inbreeding (inb1, inb2), and assessing quantitative genetic variation (qgen1). There are also a number of smaller experiments in it, including fitness of Hesperostipa spartea, aphid addition and exclusion, and pollen addition and exclusion. In 2021, we visited 6,673 of the original 10,673 planted and found 3,085 alive. Only 79 plants were classified as “flowering” in exPt01 this year. This is a drastic decrease from the 484 plants that flowered in summer 2020– perhaps it is a testament to the benefits of controlled burning (we burned in spring 2020 but not in 2021). In summer 2021, we harvested 77 total Echinacea heads in exPt01 (we have not finished the inventory process). In the fall, we added 403 staples to positions where plants were gone for three straight years. We also converted the flaple>s (pin flags bent in half in spots where we ran out of staples) into regular old staples. There are no more flaples in p1!
exPt04: Experimental plot 4 was planted to gauge whether Echinacea from small remnant populations could be genetically rescued via an outcross to larger, more genetically diverse populations. Caroline Ridley and other members planted this plot in 2008. We did not measure exPt04 this year, but there were no flowering plants. Location: Hegg Lake WMA
exPt05: The only experimental plot planted at Staffanson Prairie Preserve (SPP), exPt05, was planted to compare progeny of maternal plants from burned and unburned sections of SPP. There were 2800 plants planted originally, but high mortality made it impractical to visit the plot row-by-row. Now, we and treat the plot like demography. We use our survey-grade GPS to find plants in exPt05 that have previously flowered and add more plants to the stake file if new plants in the plot flower. In 2021 we found 11 living plants, three of which were flowering! There was only twohead to collect, one head was toppled. Location: Staffanson Prairie Preserve
exPt08: Team Echinacea established quantitative genetics experiments to quantify additive genetic variance of fitness in Echinacea, with the idea that we can estimate evolutionary potential of study populations. The maternal parents of qGen2 and qGen3 are plants in the 1996, 1997, and 1999 cohorts. These plants were crossed with pollen from plants in remnants to produce seed for qGen2 and qGen3, which now inhabit exPt08. Originally, 12,813 seeds were sown in the common garden. Seeds from the same cross (shared maternal and paternal plants) were sown in meter-long segments between nails. A total of 3,253 seedlings were originally found, but only 443 plants were found alive in 2021. There were 28 flowering plants in 2021, and 32 heads. This is the most flowering heads in p8 we have ever seen, the first year plants flowered in p8 was 2019 and in 2020 five plants flowered. Note that there were an additional 14 heads collected from transplant plot.
Plot management: To ensure that the common garden environment is as similar as possible to the prairie environment we must actively manage it. This management includes removing foreign species and supplementing with natives. One of our main management methods is through fire. We were able to burn burn p8 this spring and hope to burn p1 this spring. We also collected seed to spread after burns including Schizachyrium scoparium, Bouteloua curtipendula, along with multiple species of Solidago and quite a few Asters.
Asclepias viridiflora in p1: In 2019, plugs of an uncommon prairie milkweed, Asclepias viridiflora, were planted in Experimental plot 1. The purpose of this experiment is to assess the survival and fitness of A. viridiflora. Assessing vitality will also provide a frame of reference for species conservation across modern prairies. We did not assess the A. viridiflora plants this year.
Hesperostipa demography: In 2009 and 2010, porcupine grass (Hesperostipa spartea, a.k.a. “stipa”) was planted in experimental plot 1. In total, 4417 seeds were planted, 1 m apart from each other and all 10 cm north of Echinacea plants. Between 2010 and 2013, each position was checked, and the plant status recorded. Since 2014, we have searched for flowering plants. The data from this summer can be found here cgdata/summer2021/stipaSearch & Dropbox/CGData/Stipa/225_measure/measure2021 in addition to data in these locations there may be paper data sheets that may or may not have been entered yet. These data have not been processed yet.
Inb1: The INB1 experiment investigates the relationship between inbreeding level and fitness in Echinacea angustifolia. Each plant in experiment INB1 originates from one of three cross types, depending on the relatedness of the parents: between maternal half siblings; between plants from the same remnant, but not sharing a maternal or paternal parent; and between individuals from different remnants. We continued to measure fitness and flowering phenology in these plants. In 2021, of the original 557 plants in INB1, 95were still alive. Of the plants that were alive this year, there was only one flowering plant. All individuals were planted in 2001.
qgen: The qGen1 (quantitative genetics) experiment in p1 was designed to quantify the heritability of traits in Echinacea angustifolia. We are especially interested in Darwinian fitness. Could fitness be heritable? During the summer of 2002 we crossed plants from the 1996 & 1997 cohorts of exPt01. We harvested heads, dissected achenes, and germinated seeds over the winter. In the Spring of 2003 we planted the resulting 4468 seedlings (this great number gave rise to this experiment’s nickname “big batch”). In 2021 we assessed survival and fitness measures of the qGen1 plants. 1,519 plants in qGen1 were alive in 2021. Of those, 2.4% flowered in 2021, this is down from 17% last year. All were planted in 2003.
Team moral: Measuring experimental plot 1 is a large task for the team, it takes many days, usually hot days, with a project as large as this it is hard for the team to feel a sense of progress each day. So this year in hopes to keep the team more motivated I(Mia) took two strategies. First, we constructed a physical progress tracker, each square represented a segment in the plot A segment is a section of a row, rows are too big so we break them into sections for ease of measuring. After each day of measuring the team was able to count how many segments they completed and color in each square. The team had fun with their square decoration and got creative with it, there was various themes, fruits, names for peoples last days etc. I also made maps of the plot for each day of measuring that were color coded with what positions have been measured and which ones haven’t. Lastly, I do believe I may have bribed the team with cookies. Having multiple different forms of motivation, really kept the team motived and made the project less daunting. It was also added some excitement into measuring p1, a task that isn’t known for being too exciting.
one of the progress maps purple is done green is not done
one of the progress maps purple is done green is not done
A hearty crew finishing measuring p1 during one of the only rainy days of the season
Progress tracker aka Gopher tunnel of love
For more information on survival in common garden experiments, see this flog post about survival in common gardens.
Start year: Various, see individual listings above. First ever planting was 1996.
Location: Various, see above
Overlaps with: Pretty much everything we do.
Data/ materials collected: Measure data for all plots. All raw measure data available in cgData repository. Processed data should eventually be available in SQL database; ask GK for status of SQL database.
new p79 stake file: Jared made a cleaned up stake file for p7 and p9 that can be found here
p2 stake file/points shot: Amy shot points in p2 this year the points can be found in these 3 jobs
Since 1996, members of Team Echinacea have walked, crawled, and ~sometimes~ run next to rows of Echinacea angustifolia planted in common garden experiments. Although protocol varies depending on the experimental plot, every year team members record flowering phenology data, measuring data, and harvest the heads of the thousands of plants we have in common garden experiments.
Note that these experiments are not really gardens. “Common garden” refers to the experimental design. Most of our experimental plots are prairie restorations, a few are abandoned ag fields that are manged as grassland habitat. Some plots have multiple experiments within. The Echinacea Project currently has 10 established experimental plots:
exPts01-10. To avoid repetitiveness of reports on yearly phenology, measuring, and harvesting, this project status report will include updates on all experimental plots 1, 2, 4, 5, and 8. Reports for the others will be elsewhere: Amy Dykstra’s plot (exPt03), the hybrid plots (exPt06, exPt07, exPt09), and the West Central Area common garden (exPt10).
exPt01: Experimental plot 1 was first planted in 1996 (cleverly termed the 1996 cohort), and has been planted with nine other experiments in subsequent years, with the most recent planting being Amy Waananen’s inter-remnant crosses. It is the largest of the experimental plots, with over 10,000 planted positions; experiments in the plot include testing fitness differences between remnants (1996, 1997, 1999), quantifying effects of inbreeding (inb1, inb2), and assessing quantitative genetic variation (qgen1). There are also a number of smaller experiments in it, including fitness of Hesperostipa spartea, aphid addition and exclusion, and pollen addition and exclusion. In 2020, we visited 4,340 of the original 10,622 planted and found 3,258 alive. Only 484 plants were classified as “flowering” in exPt01 this year. This is a drastic increase from the nearly 70 plants that flowered in summer 2019 – perhaps it is a testament to the benefits of controlled burning (we burned in spring 2020 but not in 2019). In summer 2020, we harvested ~815 total Echinacea heads in exPt01 (I have not finished the reconciliation process). In the fall, we added 484 staples to positions where plants were gone for three straight years, however, we ran out of staples, so 130 of these positions have “flaples” which are bent pin flags.
exPt02: Heritability of flowering time is the name of the game in exPt02. Planted in 2006, exPt02 was planted to assess heritability of flowering start date and duration in Echinacea. In summer 2020, we visited 2,010 positions of the 3,961 positions originally planted. We measured 1,638 living plants, of which 444 were flowering. In the fall, we harvested ~626 heads from exPt02. We do not have an exact number of heads harvested from exPt02 yet, as we have not had time to complete head reconciliation. Location: Hegg Lake WMA
exPt04: Experimental plot 4 was planted to gauge whether Echinacea from small remnant populations could be genetically rescued via an outcross to larger, more genetically diverse populations. Caroline Ridley and other members planted this plot in 2008. We did not measure exPt04 this year. Location: Hegg Lake WMA
exPt05: The only experimental plot planted at Staffanson Prairie Preserve (SPP), exPt05, was planted to compare progeny of maternal plants from burned and unburned sections of SPP. There were 2800 plants planted originally, but high mortality made it impractical to visit the plot row-by-row. Now, we and treat the plot like demography. We use our survey-grade GPS to find plants in exPt05 that have previously flowered and add more plants to the stake file if new plants in the plot flower. In 2020 we found 11 living plants, two of which were flowering! There was only one head to collect, since one of the flowering plants exhibited only vertical development (no head). Location: Staffanson Prairie Preserve
exPt08: Team Echinacea established quantitative genetics experiments to quantify additive genetic variance of fitness in Echinacea, with the idea that we can estimate evolutionary potential of study populations. The maternal parents of qGen2 and qGen3 are plants in the 1996, 1997, and 1999 cohorts. These plants were crossed with pollen from plants in remnants to produce seed for qGen2 and qGen3, which now inhabit exPt08. Originally, 12,813 seeds were sown in the common garden. Seeds from the same cross (shared maternal and paternal plants) were sown in meter-long segments between nails. A total of 3,253 seedlings were originally found, but only 562 plants were found alive in 2020. There were 5 flowering plants in 2020, and 5 heads. Note that there were an additional 2 heads collected from transplant plot.
Plot management: To ensure that the common garden environment is as similar as possible to the prairie environment we must actively manage it. This management includes removing foreign species and supplementing with natives. One of our main management methods is through fire. We were unable to burn plots this fall however we hope to burn p8 and p1 this spring. We also collected seed to spread after burns including Schizachyrium scoparium, Bouteloua curtipendula, along with multiple species of Solidago and quite a few Asters.
Asclepias viridiflora in p1: In 2019, plugs of an uncommon prairie milkweed, Asclepias viridiflora, were planted in Experimental plot 1. The purpose of this experiment is to assess the survival and fitness of A. viridiflora. Assessing vitality will also provide a frame of reference for species conservation across modern prairies. In 2020 a protocol was developed to identify and measure A. viridiflora. These data are waiting to be entered and analyzed.
Hesperostipa demography: In 2009 and 2010, porcupine grass (Hesperostipa spartea, a.k.a. “stipa”) was planted in experimental plot 1. In total, 4417 seeds were planted, 1 m apart from each other and all 10 cm north of Echinacea plants. Between 2010 and 2013, each position was checked, and the plant status recorded. Since 2014, we have searched for flowering plants. The data from this summer can be found here cgdata/summer2020/stipaSearch, these data have not been processed yet.
Inb1: The INB1 experiment investigates the relationship between inbreeding level and fitness in Echinacea angustifolia. Each plant in experiment INB1 originates from one of three cross types, depending on the relatedness of the parents: between maternal half siblings; between plants from the same remnant, but not sharing a maternal or paternal parent; and between individuals from different remnants. We continued to measure fitness and flowering phenology in these plants. In 2020, of the original 557 plants in INB1, 111 were still alive. Of the plants that were alive this year, 30 (27%) were flowering. This is up from the 4% that were flowering last year. All individuals were planted in 2001.
qgen: The qGen1 (quantitative genetics) experiment in p1 was designed to quantify the heritability of traits in Echinacea angustifolia. We are especially interested in Darwinian fitness. Could fitness be heritable? During the summer of 2002 we crossed plants from the 1996 & 1997 cohorts of exPt01. We harvested heads, dissected achenes, and germinated seeds over the winter. In the Spring of 2003 we planted the resulting 4468 seedlings (this great number gave rise to this experiment’s nickname “big batch”). In 2020 we assessed survival and fitness measures of the qGen1 plants. 1,642 plants in qGen1 were alive in 2020. Of those, 17% flowered in 2020. All were planted in 2003.
Stuart and John measure Echinacea plants in exPt02 under a gloomy sky
For more information on survival in common garden experiments, see this flog post about survival in common gardens.
Start year: Various, see individual listings above. First ever planting was 1996.
Location: Various, see above
Overlaps with: Pretty much everything we do.
Data/ materials collected: Measure data for all plots. All raw measure data available in cgData repository. Processed data should eventually be available in SQL database; ask GK for status of SQL database. GPS points were shot for the exPt09 flowering plant. Find the GPS jobs containing the exPt09 corners here: Dropbox/geospatialDataBackup2020/convertedASVandCSV2020/EXPT9_20200917_DARW.asv The stake file to find exPt5 plants is here: Dropbox/geospatialDataBackup2020/stakeFiles2020/exPt05stakeFile.csv Products: Many publications and independent projects.
Throughout the summer, I designed and collected
materials to establish an experiment in experimental plot 1 to study parasites
and their impact on the community of host plants they live in. Parasitic plants
are plants which absorb nutrients from neighboring plants. Parasitism is an important
part of nutrient cycling in many ecosystems and parasite scientists hypothesize
it to be an important part of prairie ecosystem maintenance.
This summer I collected seeds from five parasitic
plant species which are native to the prairie. I also collected the seeds of
over 100 species that can be commonly found in Douglas County, Minnesota and I
have begun experimental germination of them and will continue to do so in the
future. I developed a plan to plant Comandra and Pedicularis throughout exPt 1
and establish communities of 40 host species around them to address questions
about the impact native parasitic plants have on plant community members. In
late October I harvested biomass from the proposed parasite planting locations
to understand the species diversity and abundance present before planting.
Start year: 2019
Location: Douglas County, Minnesota; exPt 1
Overlaps with: Experimental plot management, Hesperostipa common garden
experiment
Materials collected: Parasitic plant seeds (Cuscuta
glomerata:18,000 across 6 individuals in 4 locations; Agalinis aspera: ~8,000
across 81 individuals in 3 locations; Agalinis tenuifolia: ~4,500 across
41 individuals in 1 location; Pedicularis canadensis: ~14,000 from 1
location; and Comandra umbellata: ~1,800 from 3 locations) and host
plant seeds (500+ seeds per host species, numbering approximately 100 species).
Seeds are stored at the Chicago Botanic Garden.
Additionally, 216 .1 x 1m strips of dried biomass are
stored at the Chicago Botanic Garden.
Data collected: Find data related to this project
including the proposed planting scheme in the cgdata repository in
~cgdata\summer2019\Hemiparasites
This summer we found 52 basal Stipa plants and 209 flowering plants! The flowering Stipa plants had a median of 15 fruit per plant. Our largest flowering Stipa plant had 301 fruits and 31 culms. We harvested around 5000 fruits from experimental plot 1! These Stipa plants, or porcupine grass (Hesperostipa spartea) were planted as seeds in 2009 and 2010.
A Stipa collage created by Anna with collected fruits, a flowering plant, and Will and Wes searching for stipa.
Start year: 2009
Location: Experimental plot 1
Physical specimens: Fruits from the 209 flowering plants were broadcasted in experimental plot 2.
Data collected: There are currently 3 datasets in the Stipa folder in CGData (~Dropbox/CGData/Stipa/225_measure/measure2017/)
20170628StipaSearchData.csv: 50 records from 28 June 2017. We searched for basal and flowering Stipa and recorded row and position, culm count, fruit count, aborted fruit count, missing fruit count, and notes.
exPt1StipaSearch20170705.csv: 200 records from 28-29 June 2017. This csv includes rows with position 859 and status “Other (Note)”, indicating the row was searched but no stipa was found. When Stipa was found, status, row, position, culm count, fruit count, aborted fruit count, missing fruit count, and notes were recorded.
20171109StipaSearchData.csv: 69 records from 2 August 2017 and 9 August 2017. In this csv, predetermined rows and positions (where Stipa were found in previous years) were searched and the same information was collected as the other csvs. Since this was later in the season, all fruits had already dropped–but they could still be counted.
Products:
Josh Drizin’s MS thesis included a section on the hygroscopicity (reaction to humidity) of Stipa awns. View his presentation or watch his short video.
Joseph Campagna and Jamie Sauer (Lake Forest College) did a report on variation in Stipa’s physical traits within and among families in 2009
You can find out more about Stipa in the common garden and links to previous flog posts about this project on the background page for this experiment.
In 2009 and 2010, porcupine grass (Hesperostipa spartea, a.k.a. “stipa”) was planted in experimental plot 1. In total, 4417 seeds were planted, 1 m apart, 10 cm north of Echinacea plants. Between 2010 and 2013, each position was checked, and the plant status recorded. Since 2014, we have only searched for flowering plants. This summer, 143 flowering stipa were found, with a median of 24 fruit per plant. We also checked for living plants in positions where stipa was observed in 2011 or 2014. In these additional 492 positions, 89 plants were found alive, with 19 of those plants flowering.
The following table shows how many plants have been found alive in each year.
Year
Found
Flowering
Full Fruit
2010*
702
2011
483
2013
442
4
2014**
32
32
199
2015***
26
1
9
2016****
208
143
4391
(*) only one cohort (2009) included, (**) only searched for flowering plants, (***) only searched prior year’s flowering plants, (****) only searched flowering plants + subset of positions
Start year: 2009
Location: Experimental plot 1
Physical specimens: Fruits from 127 flowering plants, currently stored at the lab in Chicago. These may be used in a future study on traits of stipa‘s awns.
Data collected:
Culm count and number of fruits recorded on visors (backed up to CGData)
Fruit harvest information recorded on paper (stored at Hjelm house)
Status of 2011 basal plants recorded on visors (backed up to as “2016stipaRecheck2011positions” in CGData)
Products:
Josh Drizin’s MS thesis included a section on the hygroscopicity (reaction to humidity) of stipa awns. View his presentation or watch his short video.
Joseph Campagna and Jamie Sauer (Lake Forest College) did a report on variation in stipa’s physical traits within and among families in 2009
You can find out more about stipa in the common garden and links to previous flog posts about this project on the background page for this experiment.
While looking for some information about the establishment of the Stipa experiment, I encountered an x-ray image of a few Stipa propagules (Hesperostipa spartea). Check it out…
An x-ray image of a Stipa propagule (Hesperostipa spartea)
I also found some x-ray images of Echinacea angustifolia achenes. There are higher resolution images than the ones we now take for data analysis.
An x-ray image of achenes & other stuff from an Echinacea angustifolia head with higher magnification
An x-ray image of achenes & other stuff from an Echinacea angustifolia head
An x-ray image of achenes & other stuff from an Echinacea angustifolia head
The Stipa Project — studying the effects of habitat fragmentation on the ecology and evolution of Stipa, a cool-season grass. In 2009 & 2010 we planted over 4,000 Stipa seeds in exPt 1. We’ve been put to the test trying to find our Stipa plants in a matrix of other grasses, but once they flower they are easy to spot. While we collected seed from Stipa in our common garden in 2014, our 2015 search for flowering Stipa plants was fruitless!
This morning started with Jared and I doing an inventory of the Hesperostipa spartea (porcupine grass) in experimental plot 1. We are interested in determining the fitness of each H. spartea. We went to each plant found during a systematic search. We determined how many seeds were present on each culm of each plant. We counted the number of full (having a viable seed), inviable (having a seed that would not reproduce), or unknown (a glume that was empty, or peduncle that had no glume) seeds for each plant and harvested ripe seeds for later plantings. We found one studly plant that had 14 culms and 58 seeds that were ready to harvest! After experimenting with several methods of tying the immature awns together (to make sure we could find the seeds once they are mature and drop), we determined the most effective way to retain the seeds is to tie the awns together with twist ties. We hope the twist tie method allows us to harvest seeds before they disperse. We tried several other methods for tying the awns together (tying the awns to the stem, tying the awns to a red flag, and tying the awns together) but twist ties appear to work the best. In the afternoon I tagged my first Echinacea (plant 1980)!
