Friday, April 16, 2010

Plant of the Week


Blueflag iris
Iris virginica L.
other common names: wild iris, fleur-de-lis, blueflag, southern blueflag
Iris: from Greek, meaning “rainbow,” probably because of the multitude of flower colors in this genus. Iris was the name of the rainbow goddess of Greek mythology.
Virginica: meaning “of Virginia.”
Iris family: Iridaceae

Photograph by Thomas Rosburg, Wildflowers of the Tallgrass Prairie: The Upper Midwest, Second Edition

Wednesday, April 14, 2010

An Interview with Chris Helzer: Part 2

What species of plants or animals are you especially interested in?
That depends on when you ask me.  Right now I’m trying to learn all I can about spiders.  But I’ve been learning a lot about pollinators in the last couple of years, and I still feel like I have plenty of room for more information on that group of critters too.  I studied grassland birds in graduate school and still keep up with much of the research related to them, but most of my time now is spent thinking about and working with plants and insects—which makes sense since they make up the vast majority of grassland species. 

How does photography change the way you experience prairies?
Photography is my vehicle for discovery in prairies. When I’m walking around prairies at work or even on my own, I notice things and try to pay attention to what I’m seeing as best I can. But I’m evaluating—trying to figure out what’s happening as a result of the management or restoration strategies we’re employing. In contrast, being behind a camera in a prairie is what I imagine it must be like to be inside a submersible in the ocean. With a camera, I feel more like an explorer than just a passer-by or a scientist, and I look at things much differently. 

My favorite photographic subjects are small, and I choose subjects by the way they interact with light rather than walking around looking for something specific to photograph. Because of that, I come home with lots of photos of small creatures I’ve never seen before and then have to spend time figuring out what they are and what they do. When I figure them out, I write about them so I can use the photos and stories to share what I’ve learned with others.

What has changed in the outdoor world  since your first days of trying to protect it? What's better, what's worse?
I think more people are aware of prairies now than they used to be. I’m very excited about the number of prairie enthusiast groups that have popped up in the last couple of decades. Their energy has begun to help dispel the idea that prairies are just the boring flat places you have to travel through to get to forests, mountains, or lakes. 

In a somewhat related phenomenon, more people are also trying to move out into open areas to escape from town and own their own piece of wildness. Some of that is due to an increased interest in nature, but I think it’s also related to an increased number of people who can afford to buy land. I don’t think the changing landowner demography is necessarily good or bad, but it is definitely changing the way conservationists have to think. When we were dealing primarily with agricultural landowners, we were talking to people who knew about land management and trying to help them find ways to make a living while still providing habitat for wildlife and biological diversity. The new “recreational” landowners are more willing and/or able to put a little more priority on wildlife habitat, but they generally have much less experience with land management tools and techniques. And because most landscapes still have a mixture of both types of landowners, we also have to help work through the tensions as the two groups interact with each other as neighbors.


Caterpillar at Griffith Prairie. After a long day of painting my house one summer, I drove north out of town with my friend Gerry to take advantage of the evening light at Griffith Prairie. It was a beautiful night and we both wandered around happily with our cameras until the sun went down. On this particular night, the afterglow in the sky after sunset was so bright that when I found this little caterpillar the reflected light from the sunset was enough to make a great photograph. I love getting face to face with insects like this to show people a different perspective on what would otherwise be just another fuzzy caterpillar.


Cattle grazing in prairie. While it can be hard to watch if you’re not used to it, cattle grazing in prairies can be an important part of a management regime that favors wildlife habitat and overall biological diversity. Defoliating dominant grasses forces them to abandon much of their root mass, opening up space for other plants to move in on their territories, and prevents the grasses from becoming a monoculture. During the rest period after a grazing bout, the grasses recover their vigor, but not before newly established plants gain a foothold in the neighborhood too. Grazing can also provide for heterogeneous vegetation structure for wildlife that is difficult to achieve with homogeneous management treatments like fire and haying.


Chris Helzer, author, The Ecology and Management of Prairies in the Central United States

Friday, April 9, 2010

Plant of the Week

Yellow star-grass
Hypoxis hirsuta (L.) Colville
other common names: star-grass
Hypoxis: an ancient Greek name for some plant with sour leaves, later transferred to this genus by Linnaeus. The Latin meaning of hypoxis is “somewhat acid.”
Hirsuta: from Latin, meaning generally “covered with stiff hairs”
Daffodil family: Amaryllidaceae

Photograph by Thomas Rosburg, Wildflowers of the Tallgrass Prairie: The Upper Midwest, Second Edition

Wednesday, April 7, 2010

An Interview with Chris Helzer: Part 1

How long have you been working to protect and reconstruct natural areas?
I got some experience in college through the Wildlife Club at the University of Nebraska-Lincoln—we actually put together our own program through which we tried to help landowners write management plans and manage their sites. It was ambitious but naïve. Just what you’d expect from college students … 

Professionally speaking, I’ve been managing prairies for about 13 years, but I’ve been studying and working in prairies for almost two decades. My first real job out of graduate school was a land steward position with The Nature Conservancy, and I hit the ground running.

What was the catalyst that brought you to appreciate grasslands in the first place?
My college friend Steve Winter first introduced me to the idea that grasslands were kind of an underdog ecosystem, particularly in Nebraska where people tended to equate wildlife habitat and natural areas with trees. Steve pointed out that very few people knew much about prairies and even fewer were doing anything about their conservation. That got me interested, and it didn’t take much for me to be hooked once I started learning about them. I love to stand in a grassland where I can see from horizon to horizon without seeing a tree, and where I can feel like I’m completely enveloped by prairie. At the same time, I can also get tremendous satisfaction from being on my hands and knees in a tiny little prairie and exploring the complex worlds that exist down in the vegetation.


Hoary vetchling on a ridge top at Griffith Prairie in Nebraska. This is one of my favorite photos and also one of the simplest. It’s just a straight-on photograph of a flower, but the flower is perfect, the unopened buds are perfect, and the light was divine. This species grows in big sprawling masses of plants along the steep ridge tops of Griffith and other prairies on the edge between tallgrass and mixed-grass prairie in Nebraska.  


Bison at The Nature Conservancy’s Niobrara Valley Preserve. Bison are both really easy and really difficult to photograph. Often, you can drive right up to the herd, but it’s still frustratingly hard to find them, get near them when the light is good, and have them arrange themselves into a pleasing composition for a photograph. On the other hand, just being in the middle of sandhills prairie with a herd of bison is a pretty neat thing, so it’s hard to complain.
 


Chris Helzer, author, The Ecology and Management of Prairies in the Central United States

Monday, April 5, 2010

This Week in Iowa Nature

Bumblebee queens emerge from their winter hibernation.

Jean C. Prior and James Sandrock, The Iowa Nature Calendar

Friday, April 2, 2010

Plant of the Week

Snow-on-the-mountain
Euphorbia marginata Pursh
other common names: mountain snow, variegated spurge, white-margined spurge, wolf’s milk, milkweed (incorrect)
Euphorbia: named in honor of Euphorbus, who was a physician to King Juba of Numidia
Marginata: alluding to the broad white margins of the leaves, especially the upper leaves of the plant
Spurge family: Euphorbiaceae

Wednesday, March 31, 2010

An Interview with Donald Huffman: Part 3

What advice would you give to beginning biologists? What are the particular challenges of being a biologist in the Midwest?
My advice to beginning biologists is to avoid being too narrow in basic science studies. Considering the importance of cellular and molecular-level biology in the past 50 years, don’t limit yourself to studying organismal or population-level biology. There is a tendency to specialize, but I feel this should be postponed until at least the graduate level, because you cannot predict how useful molecular and cellular techniques and knowledge may be in understanding any group of organisms. It goes without saying that anyone wishing to become a biologist should take advanced courses in chemistry and physics as well as math.

The challenges to a Midwest biologist are about the same as those encountered elsewhere. A broadly trained biologist should be able to function readily in any part of the world. Each region has its own peculiar challenges, and one of the greatest challenges in the Midwest is to understand the problems and solutions arising due to overuse of land for agricultural purposes. Ultimately biologists must join in the effort to correct the pollution and habitat damages that have reduced fertile topsoil and species distribution about 50% in the past 100 years. This means better cooperation among biologists and landowners as well as governmental agencies to help solve such problems as soil erosion, toxic pesticide residues, habitat destruction, etc.

What are your favorite natural areas in Iowa and the Midwest? What areas do you return to constantly, and what’s your favorite newly visited area?
I have several favorite natural areas in Iowa; one of them is a very disrupted habitat of abandoned strip mines where coal was removed. I enjoyed these areas in Kansas where I grew up, and I was glad to see similar habitats in Iowa. I found excellent fossil plants dating back to the Pennsylvanian era, about 350 million years ago. I saw many of the same fossils I had seen earlier and am glad that many of these are now in museum collections around the Midwest and beyond.

Another favorite natural area for me includes a number of the Iowa state parks in which we can find remnants of forested areas. These tend to have excellent mushroom habitats, and if I had to choose a favorite, it would be one from northeast Iowa such as Palisades State Park or Backbone State Park. I enjoy each type of state park but must admit a preference for the more mature forested areas.

My favorite newly visited area is the Loess Hills of northwest Iowa. I have not done serious collecting of mushrooms there, but I am attracted to the unique properties of this area.

You’ve been working on a very interesting blog-related project called BINGO ENGLISH. Tell us more.
BINGO ENGLISH is part of an online program to teach the English language in China. My first year of teaching in China was in mycology, but there was a greater need for English teachers than for biology teachers. I joined my wife in teaching writing and conversation at Zhejiang University in Hangzhou. We taught 8 semesters in China, then were invited to join a writing team preparing a series of English-language textbooks for Chinese university-level students. This resulted in the publication of New College English (NCE), for which both my wife and I wrote and edited. We served as English editors through two editions of this comprehensive series—one book for each of 6 semesters of English—and to date NCE has sold more than 2 million copies and has been adopted by more than 550 universities and colleges in China.

BINGO ENGLISH is an online version of English-language instruction using the NCE books but targeted at noncollege individuals who wish to learn at their own pace with their choice of instructional packages.

My wife and I wrote many blogs about U.S. culture for inclusion in BINGO ENGLISH. Our colleague Ying Huilan showed some of these blogs to the editor of the Foreign Language Teaching and Research Press in Beijing. That resulted in about 80 of the blogs being included in the book Inside U.S. Culture and Life, recently published by that press as a supplemental book for English-language instruction in China.
 

Marasmius oreades (Bolt.: Fr.) Fr. (plate 87); edible
Fairy Ring Mushroom
    Cap 1–5 cm broad, rounded, maturing to bell-shaped to flat, often with prominent blunt knob; cream to reddish tan, fading when dry; dry, smooth; margin sometimes striate at maturity. Flesh thin; white or tan.
    Gills adnexed to nearly free, well separated; paler than cap, creamy white to buff.
    Stalk 2–7 cm long, 2–4.5 mm thick, equal; buff at top, darker brown at bottom, with dense white hairs at base; tough.
    Spores 7–10 x 3.5–6 µm, elliptical, tapered at one end, smooth; spore print white.
    Common, in groups or in fairy rings on lawns, pastures, and grasslands; spring, summer, fall.
    This is one of three species that commonly grow in fairy rings in grasslands such as lawns, golf greens, and pastures. The other two, Chlorophyllum molybdites and Agaricus campestris, are quite different and not likely to be confused with M. oreades. While A. campestris and M. oreades are highly recommended edible species, however, C. molybdites is poisonous. The pesticide history of the area should be known and considered, because M. oreades may take up some lawn pesticides. Clitocybe dealbata, a poisonous species, may be found in the same area with M. oreades. Thus M. oreades should be collected and identified carefully.