Preserving the Evolution of Habitats by Managing Barriers

Protecting the evolution of habitat by management barriers Today's contemporary scientific researchers are concerned about the connection and misunderstandings behind the changing endangered species of biological environment of endangered species through time and great experiments I have constantly made progress as I understand. We will investigate the species ecosystem, environment and devastated animal psychology that represent each of these three categories in detail. Sumatran tigers, endangered species - Canada bats, and interstitial - carp in Asia are representative of endangered species.

For the sake of simplicity, it is important to distinguish between human and natural barriers, physical barriers (such as dams, culverts, dry river sections) that impede migration of living things, physical and chemical Recognize the three types of conditions. Habitat barriers (eg thermal or chemical contamination, large lakes or reservoirs not suitable for river experts); biological barriers such as dense predator populations, competitors or most barrier types are identified (Eg waterfalls and waterfalls) existing in the environment of the river network (for example: waterfalls and waterfalls), because there are usually places where changes in terrain are large enough to create these steep slopes - in some parts of the river network they are evenly distributed Instead, the location and abundance of obstacles varies greatly between regions within predictable limits. (Table 1) .35 Human diseases are concentrated not only on geology and topography but also on the places that people need. For example, while point source pollution emissions (chemical pollution barriers) are concentrated in urban areas, Calvert is abundant in areas with high road density (including undeveloped areas such as rural roads and forests) . Dams are focused on geological, topographical and climatic conditions to meet the structural integrity, storage and flow requirements of the dam. Therefore, very large high head dams are less frequent in very low vacuum areas, especially when compared to ubiquitous low head dams ubiquitous in moderate decompression areas. For example, in North Carolina, the dam is more abundant at Piedmont (4 - 7 Dam / 100 km 2 or 7 - 12 Dam / 100 km Brook), which is not a flat coast but a moderate easing area. Plain (1/21 dam / 100 square kilometers, or rivers of 1/23/100 km) (data modified from reference

Since the segmentation of a wide range of habitats caused by the dispersion of obstacles in the stream (intersection of dams and roads) is considered as a major threat to the abundance and diversity of fish, the subdivision effect is preserved and managed It has an important influence. Several lines of evidence suggest that restricting the movement of the flow network has an adverse effect on salmon population. Indirect evidence of the influence of debris in flow is derived from empirical studies correlating with the size and proximity of habitat plaques, the possibilities and abundances of adjacent populations. In addition, Morita and Yokota used a simple spot model to define the threshold population size required for persistence of vitiligo (Salvelinus leucomaensis). Likewise, with regard to a hard squid (Onchorhynchus clarki), Harig and Fausch discovered that the population that moved to a new habitat upstream of the barrier strongly succeeds according to the habitat area upstream of the barrier.