Question
Need help with these for Ecology please and thank you. This is one question, it is the figure and the question.
1.
preserve its habitat. The U.S. Endangered Species functions through the listing of particular species thre ened with extinction, but for each of those species, it m dates the identification and protection of critical habi Worldwide, many other laws protecting biodiversity t a similar approach. Effect past 50-100 years Current trends Decreasing effect Continuing effect Increasing effect Rapidly increasing effect Low Moderate Hi Chapter 24 will describe how the principles of e ogy are applied to protecting habitat and how cons vation biologists work to manage ecosystems and lar scapes. In this section, we will look at the variety of wa in which conservation biologists work to understand a protect biodiversity at the level of genes, populations, a species Temperate forest Tropical Temperate Desert Inland water Genetic analyses are important conservation tools As we saw in Concepts 6.2 and 11.3, small populatio are particularly vulnerable to the effects of genetic dr and inbreeding, which can result in a decrease in gene variation and an increase in the frequency of deleterio alleles. A decrease in genetic variation can limit the exte to which a population can evolve in response to env ronmental change, potentially placing the population a greater risk of extinction. An increase in the frequer Island Habitat Climate Invasive Over Pollution loss change species exploitation (nitrogen, phosphorus) cy of deleterious alleles is also of concern because it ca cause birth or survival rates to drop, thereby decreasir the population growth rate-again increasing the risk Threat Figure 23.15 Different Biomes Face Different Principal Threats The effects of different types of threats on different biomes over the past 50-100 years were exam- ined as part of the Millennium Ecosystem Assessment, an international collaboration among more than 1,000 ecolo- gists commissioned by the United Nations. The color of each box indicates the effect of the threat to date; the direction of the arrow indicates the trend in that threat. (After Millennium Ecosystem Assessment 2005.) extinction By increasing the risk of extinction in these ways genetic problems resulting from small population size can ruin efforts to conserve a species. In some cases, cor servation biologists have addressed this threat head-o by attempting the "genetic rescue" of populations tha otherwise would appear doomed to extinction. Conside the Florida panther (Puma concolor coryi), a subspecie of puma (pumas are also called panthers, cougars, and mountain lions). By the early 1990s, the number of pan thers in Florida had decreased to fewer than 25 individu als. Compared with other puma populations, the Flori da panther population had low genetic diversity and a At a global scale, what factors have been the most important threats to biodiversity over the past decades, and what fac- tors are projected to be the most important in the future? How do these current and future threats differ between ter- restrial and marine biological zones? a A PgUp PgDn F10 F1m FS 5 6 7 8
Explanation / Answer
Option 1 is the correct answer.
All 5 threats are increasing are increasing in the tropical forest according to the figure given above. According to the deciphering key given along with the figure, the following increasing effect is observed in case of tropical forests:
