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Transcript
Habitat Control Jay Whiteside Technical Guidance Biologist Ecosystem A biological environment consisting of all living organisms in a particular area as well as all of the nonliving, physical components of the environment in which the organisms interact. Soil – Water – Air - Sunlight Examples: WHAT IS HABITAT ? The area or natural environment in which an organism or population normally lives. A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food. Depending on the species of animal, its habitat can encompass a large geographic area such as a vast prairie or forest, or be relatively small such as a single tree. Habitat Basics A Habitat must contain 4 basic components •Food •micro-organisms, grass, forbs, seeds, fruit, fungi, other organisms •Shelter •leaf and grass litter, herbaceous vegetation, shrubs, trees •Water •dew droplets, creeks, rivers, ponds, lakes, foods •Space •The arrangement of food, shelter, and water within a usable area for the organism Habitat Types There are 2 Basic Habitat Types – Aquatic and Terrestrial Aquatic Habitats Include •Ponds, Lakes, Creeks, Rivers, Wetlands •Microscopic plants and animals, aquatic insects, fish, frogs, salamanders, snakes, beavers, otters, waterfowl. Terrestrial Habitats •Grasslands – Prairies and Savannahs •Insects, songbirds (grasshopper sparrow), snakes, raptors (northern harrier, short-eared owl), gophers, prairie dogs, cottontail rabbit, rodents (cotton rat), coyote, pronghorn, bison •Forests •Insects, songbirds (warblers), snakes (copperhead), raptors (Sharpshinned hawk), Eastern cottontail rabbit, rodents (Eastern wood rat), box turtle, bobcat, gray fox, white-tailed deer WHAT IS HABITAT ? The complex interaction of space, food, water, and cover Complex because what may be of minor importance to some species may be critical to other species Examples: water – necessity for all wildlife; waterfowl, fish, shorebirds, etc. grass – grazing, thermal cover, nesting cover; mice to bison shrubs – loafing cover, screening cover, browse; cardinals to deer WHAT IS HABITAT ? The complex interaction of space, food, water, and cover Complex because what may be of minor importance to some species may be critical to other species Examples: water – necessity for all wildlife; waterfowl, fish, shorebirds, etc. grass – grazing, thermal cover, nesting cover; mice to bison shrubs – loafing cover, screening cover, browse; cardinals to deer WHEN YOU THINK HABITAT, THINK DIVERSITY A habitats quality is directly proportional to the diversity and richness of the plant community. The more different types and species of plants there are, the more habitat niches the plant community will provide. This translates into a diversity of wildlife species and an efficiently operating ecosystem (complex food web). What is Niche? A Habitat Niche is the physical space occupied by an organism. An organisms Ecological Niche is its function or position within the ecological community. Example A fox squirrels habitat is a deciduous forest. Its habitat niche are mast producing trees within the forest and its ecological niche is the dispersal of seeds as well as being prey to predators in the forest community. Why is Niche Important? Understanding the ecological concept of niche allows us to understand the ecological system as a whole. This in turn will help in making decisions that will impact the biotic community positively, or at least prevent us from taking actions that impact it negatively. HABITAT The habitat (and how you manage it) will dictate the number of wildlife species HOW DO YOU MANAGE FOR DIVERSITY ? Many times, the best management techniques to increase diversity are simply the techniques that do not decrease diversity Management is as much not doing the wrong thing as it is doing the right thing Habitat Management The manipulation of vegetation to produce desired conditions that meet specific needs of wildlife species. Tools – Axe – Cow – Plow – Fire – Gun Aldo Leopold’s Tools “ The central thesis of game management is this: game can be restored by the creative use of the same tools that which have heretofore destroyed it – ax, plow, cow, fire and gun…; Management is their purposeful and continuing alignment.” HABITAT MANAGEMENT TECHNIQUES Axe - Brush Management Very site-specific and will ultimately depend on the overall objectives of the property chemical IPT – Basal Spray Foliar Spray: IPT or broadcast mechanical Dozing - Grubbing Shredding Timber Harvest Mechanical Brush Sculpting - Example Forest Management Manipulating forest structure to increase forage production. Thinning – Retain high value trees Mast producers Good crown form 50-70% canopy retained – Remove trees of poor value Cedar, elm, sweetgum, etc. Patch Cleacutts – Size vary depending on soils, slope, and species composition. – 0.5 to 10 acre patches over 15-25% of the area Patch Clearcutts - Wildlife Openings Timber Harvest Incorporate Patch CC with thinning Average 5 ac Distribution – Facilitate easy movement between forest and openings Hydro-axe Mulching Dozer Least desirable Brush Management Planting of native trees and shrubs also qualifies as a brush management practice. Brush management practices should annually affect 10% or 10 ac of the total area under the plan. HABITAT MANAGEMENT TECHNIQUES Cow - Livestock Management Typically the most important factor affecting wildlife density and distribution in the Post Oak Savannah and Blackland Prairie Stocking rates are critical, rotate livestock, defer some pastures Concentrate livestock in ‘improved’ pastures HABITAT MANAGEMENT TECHNIQUES Plow - Range Enhancement The plow is typically used as a tool to set back plant succession and encourage the growth annual plants for food and cover. It can also be used as a tool to restore degraded habitat and build food plots for target wildlife species. Range Enhancement Native Grassland Restoration Basics of Native Grassland Restoration Prepare the site for planting Chemical, Mechanical, Burning Select species mix – The more diverse the better Include both annual and perennial forbs Planting November – May Planting depth should be ¼ inch or less No-till drill or broadcast/harrow Patience - A typical grassland restoration project requires at least 3 full growing seasons for good stand establishment. Must annually affect a minimum of 10% of the total area or 10 acres until the project is completed Typical Native Grass and Forb Mix Little bluestem, big bluestem, yellow indiangrass, sideoats grama, switchgrass, Eastern gammagrass, Maximillion sunflower, purple prairie clover, Engelman daisy, Illinois bundleflower, purple coneflower. The more diverse the seed mix the better. Include both annual and perennial forbs. May be limited by seed availability. Hand collection of seed from local sites. Strip Disking Objective Expose bare soil to encourage germination of weeds. Only disk deep enough to slightly turn the soil. Don’t plow up like a cultivated field. Fall – Winter for growing season forbs. Disk 1/3 of field in strips and rotate each year. Creates excellent brood habitat for quail and turkey. Creates abundant food and bare ground for dove. HABITAT MANAGEMENT TECHNIQUES Fire - Prescribed Burning Most important and most needed habitat management practice Inexpensive No soil disturbance Increased light penetration Increased water infiltration Litter removal Removal of stagnant growth Control of undesirable species Release of nutrients General Guidelines Rangeland – 3yr rotation Forestland – 5-7 year rotation HABITAT MANAGEMENT TECHNIQUES Gun For some species, such as white-tailed deer, harvesting of animals is necessary to maintain the population at levels that will not be detrimental to the habitat. This is typically a result of an unbalanced ecosystem •Top predators have been removed from the habitat resulting in exponential growth of the prey population and over use of critical resources. Wetland Enhancement Annually provide seasonal or permanent water for roosting, feeding, or nesting habitat for wetland wildlife. Shallow wetland management, creation or restoration Other moist soil management such as rotational grazing or exclusion (fencing out) of livestock from wetlands, especially during the growing season. Construction and maintenance of a new project will qualify for 10 years. HABITAT MANAGEMENT TECHNIQUES Riparian Management Most fertile, most productive, and most important habitat in the Post Oak and Blackland Prairie fencing deferment from grazing establish vegetation HABITAT MANAGEMENT TECHNIQUES Control of Native and Exotic Species Invasive Vegetation mesquite yaupon bahia grass Cedar Wildlife deer exotics hogs livestock Summary •Habitat is the area or natural environment in which an organism or population normally lives. A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food. •A habitats quality is directly proportional to the diversity and richness of the plant community. •A Habitat must contain 4 basic components •Food, Shelter, Water, Space •Habitat Management is the manipulation of vegetation to produce desired conditions that meet specific needs of wildlife species. •Aldo Leopold’s Tools – Axe, Cow, Plow, Fire and Gun Questions