Summer on a Shoestring


Happy Independence Day!

Officially, the last trench has been dug! A happy day for the Bartleteers! There still remains some duties associated with the trenches (soil sampling at C6, and taking root/soil samples from trench 4 at C7), however we are not sad to say goodbye to the days of trenching.

One of the graduate students on our crew from SUNY ESF, Kikang Bae, is calculating Total Belowground Carbon Allocation (more to come from her on her project in the future, right here in this blog). Part of this is measuring soil respiration using a LiCor from all 12 of our stands.

In so many words, the ground breathes. The respiration of forest soils, and what Kikang is interested in mainly, the efflux of carbon dioxide from the soil can be influenced by many interrelated somewhat sort-able abiotic (e.g. temperature, soil moisture) and biotic (e.g. microbes, plants) factors (although I don’t usually like to make those distinctions, because of secondary and tertiary interactions. Can’t soil temperature be influenced by the biotic factor of canopy cover, and temperature influence soil moisture? Anyway, that’s a different discussion). The LiCor measures the amount of CO2 coming from the forest soil, and we can dig trenches around soil respiration collars to cut off the roots of trees, shrubs, and herbs to in effect, “remove” their contribution to the exhaling soil. Thus our stands will have soil respiration collars inside of our plots that remain “un-trenched” or normal, and we will also look at trenched respiration collars in the buffers of each plot in 5 of our stands.

The crew was assigned this task, to trench 50 cm deep, 1.2 x 1.2 meter trenches, around 1 soil respiration collar in each plot, making a total of 4 trenches per stand, 20 trenches total. The trenches are backfilled and then lined with 4 mil plastic to inhibit root growth back into the trenched area. Not an insignificant task! To see pictures of the trenching process, check out our earlier posts. Friendships were forged, pairs of jeans were ruined, but alas the trenching phase of the summer is coming to a close.

One of our crew members, Gavin, will be measuring soil respiration in these trenched areas weekly, to capture changes in soil respiration as the roots die off and start to decompose. This is Gavin, using the LiCor. The chamber is placed on top of a soil respiration collar to measure the gas exchange coming from the forest floor and soil.

On another note, Happy Birthday to Cole – who turned 21 this week!

Monday was Cole’s birthday and turned out to be a great day. On and off rain storms allowed us to do some lab work and then spend the afternoon in the field. We also welcomed to our crew Lisa LaValley, a high school science teacher at Pinkerton Academy in Derry, New Hampshire. She adds an air of class to our crew that was much needed after weeks of trenching in the forest – through rain, blacks flies, and (endearingly named) BFRs (big /*&#ing rocks). Lisa jumped right into things, building isopod exclosures on Monday and immediately setting them out in the field that afternoon.

The hope for Lisa’s exclosures are to set them out in a young, mid-aged, and old stand (C2, C6, and C9) when rain is in the forecast, and lure in isopods by  leaving bait (potatoes) inside of them. The exclosures are about 6″ x 12 ” x 2″ small chicken wire cages that sit on the forest floor, but functioning as exclosures they really serve to keep other critters out, rather than isopods in.  After 48 hours, we return to the exclosures and hopefully collect all of the pill bugs, potato bugs, sow bug, woodlice, rolly pollies, or other quaintly named small animals that fall under this order of crustaceans. There are over 10,000 species of isopods, so how do we know what to look for? We have a guide to under-studied terrestrial isopods of the finger lakes region put together by one of our crew members Cole Adams along with another student from the Rochester Institute of Technology, Erin Pence, and their professors from the School of Life Sciences there, Dr. Elizabeth Hane and Dr. Harvey Pough. Although much of the work they did to create this guide was done in the Rush Oak Openings in New York State (to read about the oak openings this is a nice website in which the Nature Conservancy describes these now rare ecosystems), we hope to use and adapt this guide for the Northern Hardwood Forests in the Bartlett areas (that is, if we find any isopods are actually here).

We are interested in isopods because their exoskeletons are made of calcium carbonate and this makes them sensitive to soil acidity. Since we don’t know if they are in our woods here in Bartlett, even no result, is a result. Thursday I went to retrieve the exclosures that Lisa set out Monday and hopefully the isopods, however all were isopodless. Feeling skunked, I returned to the white house and resolved to set out exlosures in the yard the next time it rains. The plan is to set them next to the wood pile where there have been reported sightings of isopods and also by  the foundation of the house that sometimes serves as good breeding places for small bugs.

Tuesday we finished trenching at C2 and C7.

The remainder of this week we spent at Jeffers Brook. We finished up soil sampling from the trenches and backfilled them. We finished installing minirhizotrons. We finished seedling/herb inventory transects. We installed permanent seedling/herb inventory plots and inventoried them. We measured 2-10 cm tree inventory in the 4th plot of both the Old and Mid-aged stands. We measured rock area percentages. We re-labeled all stakes and repainted corner stakes. (Listing it all out just makes us feel good). The crew worked some long hard days.

Next week we look ahead to the Hubbard Brook Cooperators Meetings, a great chance for ecologists, hydrologists, students and professors alike  to come together from all over and share their research questions and findings. Our crew will have its own section of presentations scheduled for the meetings, and will use the week for some much needed respite.

As we have finished all of these field duties, we move into Phase II of the summer field season. The soil-ship enterprise and crew takes on new adventures in, you guess it, more digging! We anticipate digging 6 quantitative soil pits in the Bartlett Experimental Forest, one in the 4th plot of each stand. Each soil pit we dig this summer will correspond to a set of 3 soil pits that were dug in previous years (check a couple publications generated about roots from these soil pits here and here. Also see this by Fahey and others that describes quantitative soil pits dug in a similar method at Hubbard Brook). This is a special chance personally for me to re-live my past glory days, as a crew-member of the Shoestring project digging soil pits back in 2004. Below is a picture of me  in a soil pit at C8 Plot 2 (one of our old stands) 6 years ago that is still a favorite pic to use when giving presentations about how fun it is digging soil pits in New England. Now that is a BFR.

Otherwise, digging these quantitative soil pits is a great opportunity for us to gather data about these plots that were last added to our experimental design to provide some confidence that they are similar and comparable to the other plots in our stands.

Soil sampling – Phase II will also will include a power coring extravaganza, headed up by Ph.D. candidate April Melvin working out of the Goodale Lab at Cornell University. She is planning to take soil cores out of 7 stands across our 3 sites (Bartlett Experimental Forest, Hubbard Brook Experimental Forest, and Jeffers Brook in the White Mountain National Forest).

… … In Cooking News… …

Another victory was won this week. I had picked up a $20 breadmaker off craigslist, in hopes of having fresh homemade bread for the crew to make our lunches with. The first three attempts, and some yeasty mishaps, were less than successful. Finally a nice 2 lb bread loaf came out crusted to perfection! Already two loaves of nice and light wheat banana bread have been gobbled up by the crew. The recipe is below, and comes straight from the “breadman plus” himself.

Coming soon…

A short description of the shoestring project and experimental design, for those of you who are not directly involved in the project, like family, friends and other interested scientific folk. (This blog originally started as a way to stay in touch with the PIs about field work happenings, but is of growing interest to others, so this is something that will really “tie the room together”.)

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June 14th to June 18th

Early this week Corrie, JiYoung, and Cole roughed it out in C1, doing the seedling/herb inventory in transects and permanent plots (pictured below). Kikang trained Gavin on how to measure soil respiration at the same time.

We have found some some “bear-tivity” in our stands. At C7, they were most interested in our beer cans that top the minirhizotrons. Minirhizotrons are clear tubes we place into the ground to look at roots. Nat Cleavitt, Tim Fahey and others have used them in another study to look at root injury associated with soil freezing in the Hubbard Brook (click here to see their paper published in 2008). The minirhizotrons work in such a way that you insert a camera down the length of the tube to view the roots that come into contact with the side of the tubes. They can viewed over time to see changes underground, or in our case hopefully see new root growth as a response to fertilization treatments. We use soda and beer cans (washed and with the tops are cut off) taped to the top of the tubes so they keep light and water out. So who knew bears preferred Pabst Blue Ribbon? Luckily the tubes are not disturbed more than the cans and foam being ripped out (we put foam insulation inside them to help dissipate heat). Btw, at C1 we also had one laundry basket (used to collect leaf litter) casualty. It was upturned, with some good sized teeth marks. This is why we have replicates within plots! Well not the only reason, but anywho…

This week we also had a stellar leaf litter sorting training sesh with Cindy Wood. She hails from Bethlehem, NH and traveled all the way to Bartlett to teach us how to identify leaf litter that has been sitting in laundry baskets for a field season (it’s much more difficult than fresh litter right off the tree!). We learned that the littler hairs on the back of a yellow birch and white birch can be used to distinguish the two from each other (yellow birch hairs go parallel to the main vein, where white birch they are perpendicular, talk about tedious work). We also learned that the two species can hybridize a lot so if you can tell the species from the shape of the leaf that is the quickest way to ID them. Thanks to her excellent examples, the crew has been sorting up a storm! We are making our way through our litter sorting duties for the summer.

Thursday and Friday the crew spent working at Hubbard Brook, and Jeffers Brook (in Woodsville, NH). We had an ambitious plan to complete the trenching, soil sampling, and seedling/herb inventory at these stands, so of course it rained hard!

This afforded us the chance to spend some time with Nat Cleavitt and the veg crew over in Hubbard Brook sorting litter samples. They even helped us identify our unknown species from our Jeffers Brook veg surveys, those girls know their plants!

Luckily we have a dedicated crew and still finished most of the tasks on our list. Gavin and I finished the last trench at JB. It was interesting that 2 of the 8 trenches at JB we found earthworms (in plots 3 and 4). Plot 3 had the most abundant number of them. Over a dozen in one trench, if I remember right. We find this interesting as ecologists doing a nutrient cycling study because earthworms can greatly influence the physical and chemical soil environment. (Check out this paper by Bohlen and others that describes earthworm impacts on C and N storage in forest soils or  this one by Li and others that describes their impact upon microbes in the forest soil). We also heard some loons and bull frogs calling as we finished our last trench, something we don’t hear often at our stands.

After a long week in the field, on my way back to Bartlett that Friday night I came upon a bad motorcycle accident on the hairpin turn on the Kank. It was bike week in Laconia, so there were lots of bikers out enjoying the beautiful (but sometimes dangerous) seasonal by-ways we have here in NH. Unfortunately with no helmet law, bad accidents can be worse. Thanks to Ruth sending her first aid kits along to the field crew, I had one in the back of my car and was able to help out some of the hurt cyclists. The crew and I talked about safe-driving on these long and winding roads, and we all hope that the injured parties are on their way to a good recovery.

On a lighter note…

Menu Items from the White House

This week we are happy to share with you two recipes that Gavin’s mom was delighted to share with the crew! (In her words, “I can’t believe I’m swapping recipes with Gavin!”. We thank her, because they produced some delicious meals!

Minestrone Soup

Brown 1 lb sausage or hamburger(look for lean), drain and then add two
chopped onions and 2 cloves garlic finely chopped.  Save time and only
brown the meat and add the onions and garlic later.

Add 8 c water, 28 oz can crushed tomatoes, 3 tsp beef bouillon, 1 tsp
Italian seasoning, 1/4 tsp ground pepper, 2 medium carrots sliced and
pared, 2 stalks celery chopped, 2 potatoes chopped.   Bring to a boil
and then reduce heat and cook till veggies are tender.  (15 minutes or
so) Add 15 oz can garbanzo beans(or sometimes called chick peas) 9 oz
can green beans, 1 small can kidney beans, and 4 oz pasta( optional)
and cook till pasta is cooked.

Strawberry Shortcake

6 servings, 4 for dinner servings

2 quarts Strawberries
1/3 to 1/2 c sugar   depending on how sweet you want it.
1/2 pint whipping cream

2 c flour
3 Tablespoons sugar
3 tsp baking powder
1 tsp salt
1/3 c shortening(white crisco)
2/3 to 3/4 c milk

An hour or more before eating, wash berries and shake gently dry.
Remove caps and slice add sugar and stir every once and a while to
bring the juice.   Put in the refrigerator.

Whip cream with electric mixer hand held or stand, and add 1 tsp
vanilla and 1/2 c sugar.  Beat till whipped cream.  The cream should
hold a peak if the beater is removed.   Put in refrigerator.

Mix all dry ingredients, cut in shortening with fork or pastry blender
Mix in milk.  Either put into 8 or 9 inch cake pan, or use 8 inch
square pan.  OR you can roll them out.   Bake at 450 for 12-15
minutes.   You do not want these too brown or raw.  Make these up
fresh just before serving.

To serve cut in 4 pieces, split each piece and fill with strawberries
and cream  OR split whole cake in half horizontally and fill with
cream and strawberries and then put top on and repeat.   I do not do
it this way, because it is not as good soggy as leftovers!





The Field Season Begins!
June 14, 2010, 2:51 am
Filed under: Cooking in the white house, Seedling/Herb Inventory, Trenching

Hello from Bartlett to our PIs and other interested folks out there on the internet machine! This is the field coordinator, Corrie, signing on for our first entry of our summer’s online journal of experiences in the field at the Bartlett Experimental Forest (BEF) and shared time in the white house!

The field work has gotten off to a great start! Last week began at our two Jeffers Brook stands, where Dr. Tim Fahey (out of Cornell) joined our crew of expert diggers, Gavin, Cole, and Kikang to dig 50 cm deep trenches around spots for soil respiration collars. The crew has mastered the art of using the amazing Pulaski Axe, a tool developed by a former USFS employee named (surprise surprise) Ed Pulaski, to construct firebreaks out in Idaho. We have found the Pulaski to most certainly be the right tool for the job of trenching for soil respiration collars and attribute some of our early success at trenching to this fantastic tool!

Last week we also had the privilege of being visited by RIT Prof. Elizabeth Hane. She proved herself to be a tried and true field ecologist – spending hours teaching us to identify seedlings and herbs in the pouring rain! We surveyed a few of our stands during her short but very helpful stay, and now we are now among the proud few that can distinguish between Sugar Maple, Striped Maple and Red Maple germinates!

This week we fall into full swing of seedling/herb inventories starting at our favorite and youngest stand C1. Kikang and Gavin will be working the 3rd shift measuring soil respiration (day and) night, and Ben will start sampling in Watershed 101 at Hubbard Brook!

Pictures are soon to be uploaded, along with dinner menus/recipes and maybe even some video… So far we have already set the bar high while cooking in the white house, with Kikang and JiYoung’s homemade sweet potato tempura, and Ben’s Grandma’s recipe for Spätzle.

Notes from some of the crew members to come as well.

BARTLETEER ALL-STAR STATS

Trenches Dug: 9 Left to Dig: 9

Minirhizotrons Installed: 100 Left to Install: 40

Stands Inventoried for Seedlings/Herbs: 2 Stands Left: 5

2009 Basket Litter Sorted: 4 Left to Sort: 196!

Soil pits dug: 0 Left to Dig: 6

Nights spent measuring soil respiration: 0

Isopod catch count: 0