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Natural Resources Wildlife Resources NATURAL RESOURCES WILDLIFE RESOURCES WILDLIFE "For if one link in nature’s chain might be lost, another might be lost until the whole of things will vanish by piecemeal” Thomas Jefferson Wildlife Defined Wildlife are the animals that live wild in a country. Animals include amphibians, reptiles, fish, mammals, birds, and invertebrates. Only animal’s native to the Country are usually considered wildlife and domesticated animals that have become wild, or feral, are usually not included. Wildlife are the wild animals and vegetation, especially animals living in a natural undomesticated state.1 Wildlife in Pennsylvania Figure 1: Animal Chart 2 The vertebrates in Pennsylvania include A great amount of variation exists in a fishes, amphibians, reptiles, birds, and mammal’s size and means of living. More than mammals. Of these vertebrate species the 60 mammal species are known to exist in mammal is the most highly evolved. Mammals Pennsylvania. Most mammals are nocturnal are warm-blooded animals that have hair or and therefore not as easily to observe as other fur, nurse their young, and have four- wildlife. The most obvious forest mammals chambered hearts. All Pennsylvania mammals tend to be the nut-eaters such as squirrels and bear live young. chipmunks while more abundant mammals are in a forest are the deer mouse and white- footed mouse. Birds, though present at any time of the year, are most diverse and abundant during the spring, summer, and fall when migration and breeding are occurring. Pennsylvania has over 180 breeding species of birds and many others Young Red Fox, Commonly called a pass through the state when migrating during “Kit” spring and fall. Like mammals, birds are warm-blooded, able to regulate their own internal temperature so they may remain active 1 Source: Webster’s II New College Dictionary, when it is hot or cold. Boston, NY 1999 2 Vertebrates are a member of the subphylum Reptiles have a body covering of dry scales, Vertebrata, and phylum Chordata that include the claws on their toes, and unlike birds and fishes, amphibians, reptiles, birds, and mammals, mammals, are not capable of producing all of which have a segmented bony or cartilaginous sufficient heat to maintain a constant high body spinal column. (Source: Webster’s II New College temperature. All reptiles are exothermic or Dictionary, Houghton Mifflin Company, 1995) 2 cold-blooded, meaning they depend on their Significant Era’s of Wildlife Conservation environment for body heat. Snakes, lizards, and turtles are all reptiles, and each of these Era of Abundance 1600-1849 groups becomes less abundant from the warm to the cold climates. ¾ Native wildlife was abundant especially bison, grizzly bear, elk, pronghorn, Amphibians differ from reptiles in that they lack waterfowl, and passenger pigeon scales and claws and must remain moist. Like ¾ Animals associated with early reptiles, amphibians are exothermic and often succession were far less common such feel slimy and cold. Most amphibians are as deer and quail found in moist areas, not only because their ¾ Predator control began skin requires moisture, but because they must ¾ Closed season on wildlife (deer) reproduce in water. The amphibians include salamanders, frogs and toads. Eastern Wood Frog: Genus Species: Rana sylvatica Bison: Gensus Species: Bison Bison In Pennsylvania, with some 83,000 miles of streams and rivers and hundreds of lakes, there are over 160 species of fish in about 24 Era of Over Exploitation 1850-1899 different families.3 There are many different types of fish because Pennsylvania offers ¾ Coincided with accelerated human many types of aquatic conditions. Fish settlement of North America habitats include; deep and shallow lakes, ¾ Telegraph allowed tracking of mountain streams, silty rivers, and swamps, herds/flocks and ponds. All fish share some body forms, ¾ Railroads provided transport to local functions and habitats. Most fish are markets ectothermic, have a bony backbone and ¾ Improved firearms facilitated mass skeleton and are grouped under the scientific harvesting class “Osteichthyes”. Fish breathe by taking ¾ Loss of bison, prairie chicken, Eastern up oxygen that is dissolved in water through grizzly, wolves, and passenger pigeon their gills, and their gills release carbon dioxide ¾ Yellowstone National Park established and ammonia. Most all fish reproduce by ¾ First “bag limits” established laying small, round jellylike eggs in the water. ¾ Supreme Court case – Geer vs. Connecticut established public ownership of wildlife Era of Protection 1900-1929 ¾ Drastic declines of wildlife and other Pumpkinseed: Genus Species: resources alarmed the public Lepomis gibbosus ¾ Lacey Act passed ¾ Response to overexploitation was legal protection 3 Source: PA Fishes Chapter 1, Fish Biology, PA Fish & Boat Commission Website, 2003 3 ¾ Legal protection became the primary ¾ Endangered Species Act (ESA) – 3 tool of wildlife conservation versions – 1966, 1969 and 1973 ¾ State fish and game programs emerge ¾ More interest in ecosystem approaches ¾ Still a negative view upon predators ¾ First National Wildlife Refuge established ¾ Federal control over migratory birds Era of Game Management 1930-1965 ¾ Realize a need for more study of biology and ecology of animals ¾ Wildlife conservation orientated toward game animals ¾ Increased public funding of conservation ¾ Aldo Leopold published game management book ¾ Duck stamps authorized by Congress Figure (2): Land Cover in Pennsylvania: to raise funds for wetland preservation Source: DCNR Habitats Website, 2003. ¾ First North American wildlife conference held Land Cover in Pennsylvania ¾ Federal Government plays major role in Pennsylvania’s land area can be classified into wildlife conservation approximately 92.9% rural land cover (forest, fields, water), 7.1% suburban and urban land cover (includes all gravel or rubble) types.4 See Figure 2: Land Cover in Pennsylvania. Combining rural and suburban/urban types, forest comprise 62% of total land cover, herbaceous5 openings comprise 26%, and successional6 habitat comprise 7% of land cover. (See Figure 2) 4 Pennsylvania Habitats. Pennsylvania Department of Conservation and Natural Resources. Pennsylvania Habitats Website. 2003 5 Herbaceous is defined as relating to or typical of an herb distinguished from a woody plant, and 2002-2003 Federal Migratory Duck Stamp green and leaflike in appearance. Source: featuring the Black Scoter Webster’s II New College Dictionary. 1995, Houghton Mifflin Company. Era of Environmental Management 1966- 6 “Successional” refers to the process of ecosystem Present development as brought about by changes in population of species that results in the creation of ¾ Many landmark laws passed: EPA, a geographic region with particular characteristics. Early successional refers to species that tend to NEPA, CEQ, and ESA more quickly give way to other species (weeds, ¾ Recognition that there is a need to look non-native varieties, etc.), typically representing at the environment from a more holistic lower quality habitat. Late-successional refers to approach more persistent species, and tend to be associated ¾ Emergence of Endangered Species with higher value habitat. Souce: Washington State conservation Department of Ecology Website, Definitions and Acronyms, 2003. 4 Wildlife Habitats in Pennsylvania survivors have become more effective in their pursuit. Animals have developed physical In the simplest terms an animal’s habitat7 traits and behaviors that help them get the refers to the place where it lives. A livable most from their environment with the least habitat should offer a supportable climate, a amount of effort or risk. diverse terrain, ample space, and a dependable supply of food and water. The amount and distribution of these will influence the types of wildlife that can survive in an area. Food sources might include insects, plants, seeds, or even other animals. Water sources many be as small as drops of dew found on grass or as large as a lake or river. Wildlife need cover for many life functions, including nesting, escaping from predators, seeking shelter from the elements, and resting. Animals also need space in which to perform necessary activities such as feeding or meeting mates. The space an animal requires if often referred to as its “home range”. A habitat, in essence is the sum total of an animal’s daily needs. These needs may change based on the individual species and Oak-Hickory Forest Habitat in Pennsylvania may change throughout a year or throughout Source: The Field Guide to Wildlife Habitats their lifetime. Even in the course of a day an of the Eastern United States animal may visit more than one habitat to fulfill all its needs. (See Figure 3: Species Diversity Habitat Types in Pennsylvania and Forest Succession) Terrestrial Habitats Forests Farmlands, Grasslands, Open Habitat Urban/Suburban Areas Aquatic Habitats Figure (3): Species Diversity and Forest Succession Wetlands Animals are motivated by the desire to eat, pass on their genes, and avoid predators. Streams, Rivers Through many years of trial and error, the Special Habitats 7 Habitat is an area with the combination of resources like, food, cover, water, and Caves environmental conditions (temperature, precipitation, presence or absence of predators and competitors) that promotes occupancy by Talus Slopes individuals of a given species and allows those individuals to survive and reproduce. Source: Morrison et al. 1992. pg. 11, Wildlife-habitat Vernal Ponds Relationships 5 thickets are
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