Habitat Conservation ....... by T.R. Michels

[Hammerhead]

Habitat Conservation

I don't claim to know a lot about habitat conservation, other than to say I know we need it, for a variety of reasons. I've lost at least two good deer hunting areas to development since 1997. Obviously those areas also contained songbirds, small mammals, trees, shrubs, herbs, forbs (wildflowers), butterflies and other invertebrates. I've also noticed the destruction of good wildlife habitat (for housing or business development projects) in Minnesota, Wisconsin, Iowa, Colorado, Idaho, Montana, New Mexico and many other states. As a result of this I find myself becoming more interested in, and hopefully more knowledgeable about, both wildlife and habitat conservation.

As I've traveled around the country during the past several years on our Natural History Eco-Tours and family adventures, I've had the opportunity to meet and talk to several different outdoorsman. I recently met the biologist for the "Northern Trail" at the Minnesota Zoo, who manages the wolf, tiger and other exhibits. Then I met the Outdoor Education Manager for the Three Rivers Park District in Hennepin and Scott Counties of Minnesota (which includes the recognized IBA [Important Birding Area] of Murphy Hanrahan Park), and an attorney with the state of Minnesota who writes legislation for threatened or endangered species. And with all of them - our conversation got around to habitat and wildlife conservation.

As a result of talking to Minnesota's State Farmland Wildlife Manager, Al Berner, about such various species as deer, ducks, pheasants, turkeys, sharp-tailed grouse and prairie chickens - I've come to realize that the loss of habitat for many game species also means loss of habitat for many non-game species, such as insects, fish, small mammals and songbirds. In other words what is good for the game birds, is also good for the songbirds and other types of birds.

While I was talking to Al he impressed upon me the need for habitat restoration such as Conservation Reserve Program lands, and other habitat conservation, such as preserving or maintaining existing prairie and wetland habitat. Many upland bird (game) species, such as pheasants, sharp-tailed grouse, prairie chickens, gray partridge, and even turkeys, need large areas of prairies, meadows, swamps, sloughs, fens, oak savanna, etc., for breeding and nesting habitat. Those areas also support Dickcissel, Bobolink, Meadowlark, and various species of sparrows. Many of those areas, because they are often on fairly level ground that might not be suitable for farming, are destroyed to make room for business complexes and housing. I see we just lost an area where I used to photograph Dickcissels in 2007, to farming.

To those outdoorsmen and nature lovers who don't hunt, this might not seem like a concern, except that those areas are also prime habitat for many species of birds, small animals, reptiles, amphibians, fish, wildflowers and other plants. As I lead our natural history tours I've begun noticing the wide variety of native plants, wildflowers and birds that use wetlands, meadows and prairies. I've also begun to realize how much of their habitat is destroyed by human encroachment, in the name of progress.

After watching several programs on the Discovery, History and Animal Planet channels, I've come to realize the importance of wetlands (that serve as important habitat for birds) as barriers to the negative effects of storm surges and flooding. Cattail, sawgrass, rushes and other wetland plants have the ability not only to reduce erosion due to flooding and storm surges, they also have the ability to reduce the harmful effects of pesticides, herbicides and fertilizers on the water and plant life, which provides needed habitat for the wildlife (including birds).

When rain falls on land covered with natural vegetation, the plants can slow the flow of run-off until it has a chance to sink into the ground, resulting in only a 10 per cent run off. However, when rain falls on a parking lot, 55 per cent of the water can run off into local brooks, creeks and wetlands; and from them into larger bodies of water.

Run-off water may contain a variety of contaminants including oil, grease, heavy metals and sediments, plus harmful herbicides and pesticides, and fertilizers containing phosphorus, which can promote the growth of algae, often resulting in mass of green scum floating on the surface of the water, and result in algae "blooms" which often turn the water red-brown or blue-green.

Any of these conditions can result in less sunlight entering the water, causing less photosynthesis by native aquatic plants, resulting in less oxygen content in the water, and the possible spread of less beneficial and /or non-native and invasive plants, which do not help maintain the balance of the eco-system.

The preservation or creation of shallow swamps, sloughs, ponds or lagoons, between run-of water and/or streams, and deeper bodies of water, with their native vegetation, can greatly increase the natural filtration of water. Plants such as cattails, saw grass and sedges that may have extensive root systems which survive in shallow water, not only slow the speed of the water, but also trap sediments, and can filter out and use some of the contaminants that may cause a negative impact on the ecosystem plants in deeper waters.

Habitat Destruction for Economic Gain

Destruction of prairies and meadows for the development of agricultural, business and residential property reduces grasses, sedges and forbs (wildflowers) that provide seeds, pollen, forage and nesting habitat for birds, habitat for small mammals, which in turn support raptors and predatory mammals. Without beneficial ground cover (used by ducks, geese, grouse, songbirds, small mammals, insects, etc.), much of the precipitation that falls on the ground (which would normally soak slowly into the ground) may run off, often eroding the land (which causes further destruction of the habitat) and form gullies that may quickly funnel the water, with any contaminants, into creeks, streams, rivers, sloughs, marshes, ponds, lakes and larger bodied of water.

The construction of even the most primitive of roads in any type of habitat often leads to this same type of erosion, and the same type of habitat destruction and surface and water pollution. Off-road vehicle use often destroys ground cover, which again results in water runoff, and the eventual erosion of the topsoil, and the creation of more gullies; and the cycle continues. I've seen the destruction that the development of gravel roads into the sagebrush flats and foothills of the Rocky Mountains near many towns creates.

Agricultural fields and livestock pastures often allow runoff of pesticides, herbicides, fertilizers and animal waste into creeks, streams, rivers, sloughs, ponds, lakes and rivers; which affects aquatic plants, fish and invertebrates; in turn affecting mammals and birds. This can easily be alleviated by creating buffers of natural vegetation to stop or slow the water from running directly into the water. These buffers can act as habitat for birds and other wildlife. Livestock also cause erosion of the banks of watersheds when they destroy natural vegetation and breakdown the banks. This can be avoided by erecting fences to keep the cattle away from the water

Section Line (as in road-ditch) Habitat

Al Berner informed that by law, the 33 feet on either side of the right of way on all section lines (four of them in on square mile, running from east to west and north to south surrounding the square mile) belongs top the state, and if it was left in natural conditions, would provide thousands of acres of habitat for wildlife in Minnesota. Basically what this means is that the 33 feet on either side of many roads in Minnesota, plus all of the land on section lines without roads, could be left in natural habitat, But, farmers rarely recognize these lines, or honor the laws that forbid them from burning, plowing, mowing and planting those right-of-ways. And to top it off the city, county and state often mow the ditches, effective destroying the habitat, which is not only used by pheasants and ducks to raise young (which often gets the hunters and trappers up in arms), it also is used by many birds and small mammals.

Fire Suppression

Fires, whether from natural causes such as lighting, or caused by humans (intentionally or unintentionally) on prairies and meadows, and in brushy areas and forests, have been part of the natural process of plant regeneration for centuries. Even naturally caused wildfires can be beneficial as they reduce natural fuels, which in turn reduces the chances of wild fires in the near future. Wildfires also expose mineral soil for seedbeds for regeneration of wind-disseminated species, such as fungi, mosses, grasses, forbes and many tree species. The reduction in vegetation in turn helps in the control of insects, diseases, and competing vegetation. As a result of this wildfires often result in the improvement of natural ecosystems and wildlife habitat as varied as wetlands, prairies, brushy areas and forests.

Native Americans often deliberately set fires to clear the land for horticulture, to improve access to some areas, and to change the composition of the plant community to attract game animals (such as bison). Early settlers set fires to assist in preparing the soil for agriculture and to eliminate stubble from the fields in the fall.

However, because of the destruction of human life, property, and resources by wildfires, the general government policy for most of this century has been to utilize man-made fire for the suppression of wildfires. The use of media campaigns such as Smokey the Bear, and Bambi fleeing from a fire, combined with fire suppression practices has resulted in a build up of vegetative fuels in many areas. Fire ecologists expect it will take several years of wildfires to establish a natural fire regime in many ecosystems.

In some areas where fire has been prevented from conducting its natural role in the environment, private and governmental agencies and scientists are setting controlled fires to mimic natural fire and improve landscape health and community safety. "One of the hard lessons we've learned is that eliminating or suppressing all fires actually increases the risk to people, damages natural habitats and drives up fire fighting costs" said Susan Harris, state director for the Nature Conservancy of Missouri.

Years of forest management practices that have eliminated wildfires has resulted in many forests becoming choked with thick undergrowth and small trees, that naturally occurring fires would normally eliminate. After years without fire, these forests become tinderboxes that are prone to hotter burns that are harder to control and pose a greater risk to communities than normal. These intense fires can have the ability to severely damage plant and wildlife species.

The Benefits of Fire

Many plant and animal species need fire to reproduce and thrive. Plants that need fire to reproduce and thrive are referred to as "burn-species". Some of the "burn species" plants are ephemeral annual herbs and forbes that have found an unusual means of adapting to environments that are for the most part unfavorable to their survival.

In the first year after a fire has temporarily diminished dominant forms of vegetation these herbs and forbs may appear and flourish, and upon maturation, they leave their sees behind. Although these plants may disappear from the landscape within a few years of a fire, the seeds can remain viable for up to 100 years or more. The goal of the seeds is to re-colonize the area after another fire. The plants may also appear from time to time in areas disturbed by other means, such as along sections of recently cleared trails, on land slides, and even along the areas of new road construction.

White-tailed deer, doves, quails, turkey, sharp-tailed grouse and prairie chicken are game species that benefit from prescribed fire. Habitat preferences of several endangered species, including the Florida panther, gopher tortoise, indigo snake, and red-cockaded woodpecker, are also enhanced by burning. The benefits to wildlife from fires can be substantial; fruit and seed production is often stimulated; herbage, legumes, and browse from hardwood sprouts may increase in both quality and quantity; and openings are created for feeding, travel, and dusting.

After years of fire suppression in many areas, land managers now have to go back and ignite fires to mimic the natural fires these species depend on. Prior to settlement by the Europeans, occasional fires were an integral part of many ecosystems, and native plants and animals had adapted to the occurrence of wildfires. Forests were a more varied blend of old and young trees, and some forests were more open in character. Fire recycled the nutrients of the dead wood for use by growing plants, and conditioned the forest floor for the regeneration of species that are dependent on disturbance of the forest floor.

Pine trees of many species are a prime example of species that benefit from fire. During high intensity burns, the sealed cones of many pines open up, allowing dispersion of seeds over the fire-cleared ground. Anyone who has visited Yellowstone Park since the latest wildfires there has seen the abundant re-growth of not only the pine trees, but of many grasses, wildfires and shrubs; which have provided new habitat for many species or birds and mammals. In many areas pine trees are failing to regenerate due to past fire control practices.

The federally endangered Red-cockaded Woodpecker is a fire-dependent species. It nests only in mature pine trees that are free of surrounding underbrush. Researchers believe the Red-cockaded Woodpecker colonies in many areas have been abandoned because the sites have become too brushy. Periodic fires would control the brush, which may provide predators with access to woodpecker nests.

Entire ecosystems often need fire to maintain their natural diversity of plants and animals. Many pine-oak, oak forests, and oak savannahs have poor reproductive success without occasional fires. Little or no oak regeneration has occurred in some areas as a result of fire suppression. Oaks provide acorns in the fall, which are an important food source for black bear, white-tailed deer, turkey, and other wildlife.

Part of the problem with "the idea of conservation" is that we humans may have begun to realize too late that in order for this planet, and us, to survive, we must conserve, and preserve, much more of the native habitat of the entire world, than we ever realized - until just the last century, after much of the important and needed habitat has already been destroyed - by us. We need to look at not only saving a particular wildlife or plant species, but saving the surrounding habitat and other species that are all dependent on each other for survival and reproduction.

Eco Systems and Eco-system Management

What is an Ecosystem ?

In recent years conservationists have begun to realize that in order to properly maintain and manage wildlife habitat, they need to look beyond just the immediate area or species of concern, to a much broader area, in which the microbes, animals, plants, and geology of the habitat interact as an entire system, that interacts within itself.

The Glossary of Forestry Terms for the Province of British Columbia defines an ecosystem as "a functional unit consisting of all the living organisms (plants, animals, and microbes) in a given area, and all the non-living physical and chemical factors of their environment, linked together through nutrient cycling and energy flow. An ecosystem can be of any size-a log, pond, field, forest, or the earth's biosphere - but it always functions as a whole unit"

Most Americans are familiar with the term "Yellowstone Ecosystem" which the US Government uses to define the interaction of microbes, plants and animals of the area surrounding Yellowstone Park. This area encompasses not only the caldera or crater of the Yellowstone volcano, but also stretches of the Bechler, Fall, Firehole, Gallatin, Gardiner, Gibbon, Lamar, Lewis, and Yellowstone rivers. One of the original descriptions of the "ecosystem" of Yellowstone took into account the range of the endangered grizzly bear. The Yellowstone Ecosystem was later defined as the range of the cutthroat trout in the area, and later still to the range of the antelope, bison, elk, whitebark pine and other species - until the ecosystem has grown to what it is today, a large part of northwestern Wyoming, and smaller parts of southern Montana and eastern Idaho.

One definition of ecosystem management was expressed by J. Stan Rowe in 1992. "Ecosystem management is the application of the ecosystem approach in the conservation, management, and restoration of regional and local landscape ecosystems. It means that everyone attends to the conservation and sustainability of ecosystems, instead of sharply focusing on the productivity of individual or competing resources -- which has been our traditional mode of operation." An ecosystem can be as small as a backyard or small watershed, or as large as the planet earth.

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T.R. Michels, Trinity Mountain Outdoors, PO Box 284, Wanamingo, MN 55983
Phone: 507-824-3296 E-mail: [email protected] Website: www.TRMichels.com

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I don't really know when that article was written (and I'm not really disputing much of what is said above) but I just wanted to inform readers that the road ditches in Minnesota are forbidden to be mowed (by law) till August 1st. The grass that is mowed is baled and used for cattle bedding and feed. This late mowing allows Pheasant, Partridge, etc to complete their nesting cycle. Since this law has been passed, I have seen an definite increase in the Pheasant population. With the pheasant and partridge population rising, predators like Fox, Skunk and Racoon have also increased in number. There has also been a rise in rodent numbers like Voles, shrews, etc with a consequent rise in Owl and Raptor numbers. A four lane highway with it's median and ditch on each side has a substantial amount of land area which is beneficial to wildlife. The ditches are deep. Some of the grass in the middle will be six feet high.

A little far sighted planning goes a long way. There is still so much that we have to learn about conservation but every little step helps. Small things like setting aside road ditches from being mowed till after the nesting season can have big dividends for wildlife.

Basically what this means is that the 33 feet on either side of many roads in Minnesota, plus all of the land on section lines without roads, could be left in natural habitat, But, farmers rarely recognize these lines, or honor the laws that forbid them from burning, plowing, mowing and planting those right-of-ways. And to top it off the city, county and state often mow the ditches, effective destroying the habitat, which is not only used by pheasants and ducks to raise young (which often gets the hunters and trappers up in arms), it also is used by many birds and small mammals.

Below is a two lane state highway, near where I live, in the period before mowing is allowed. The land all the way up to the tree line belongs to the state and is not mowed till August. You can see how substantial the amount of land that is set aside is. The 33 ft mentioned is for two lane roads, Four lane highways have a more substantial amount of land set aside.

Photo from wikipedia

Here is a ditch that has already been mowed. The crops (soybeans) are starting to encroach on the ditch. If the farmer is caught doing this, he will be forced to plow under the last few rows of crops and revert the area to what it was. In the past this was allowed to slide but now there is a stricter observance of the law. Most of today's farmers are well educated and understand the need for conservation.

Photo from HERE

Below is a four lane Interstate Highway after mowing. You can see the substantial amount of land set aside here. On the right hand side is the road ditch and the state land stretches all the way to the fence-line on the other side of the water. On the left hand side is the median and the the two other travel lanes. On the far side of the two other lanes is another road ditch as wide as the right hand one. So you can see that every mile of highway sets aside huge amounts of land.

Photo from HERE

[shooter]

Good one haji.
+1 xl