melanism

简明释义

英[ˈmeləˌnɪz(ə)m]美[ˈmeləˌnɪzəm]

n. [动] 黑变病

英英释义

单词用法

同义词

反义词

例句

1.Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.

昆虫黑化是自然界中普遍存在的一种多型现象，也成为揭示物种在自然界中进化与适应的经典范例。

2.Sixty percent of the tumors were accompanied with calcification, 35% with ossification, 25.5% with hemosiderin or melanism.

病例伴有钙化，35％有骨化，25.5％有含铁血黄素或黑色素沉着。

3.Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.

昆虫黑化是自然界中普遍存在的一种多型现象，也成为揭示物种在自然界中进化与适应的经典范例。

4.What advantage melanism brings in these circumstances is obscure.

在这些环境中表皮黑化到底有什么优势似乎模糊不清。

5.In some regions, melanism can provide better camouflage for predators.

在某些地区，黑变症可以为捕食者提供更好的伪装。

6.The occurrence of melanism in moths can be attributed to industrial pollution.

蛾类中黑变症的出现可归因于工业污染。

7.The study of melanism reveals how certain species adapt to their environments.

对黑变症的研究揭示了某些物种如何适应其环境。

8.Researchers are investigating the genetic basis of melanism in various animal populations.

研究人员正在调查各种动物种群中黑变症的遗传基础。

9.A black panther is an example of melanism, where the animal has a dark coat due to excess melanin.

黑豹是黑变症的一个例子，其动物因黑色素过多而拥有深色毛发。

作文

Melanism is a fascinating phenomenon found in various species of animals, characterized by an excess of dark pigmentation. This condition results in darker fur, feathers, or scales, which can serve multiple purposes in the lives of these creatures. Understanding melanism (黑色素沉着) not only provides insight into the incredible diversity of nature but also highlights the intricate relationship between organisms and their environments. In the animal kingdom, melanism (黑色素沉着) can be observed in several species, including leopards, jaguars, and even some birds like the black panther, which is actually a melanistic leopard. These animals exhibit a striking appearance that often captures the attention of wildlife enthusiasts and researchers alike. The dark coloration can offer advantages such as improved camouflage in dense forests or shadowy environments, allowing these animals to stalk their prey more effectively. Additionally, melanism (黑色素沉着) can be a response to environmental pressures. For instance, in regions where volcanic activity has created dark landscapes, animals with darker coats may have a better chance of survival due to their ability to blend into their surroundings. This adaptation showcases the principle of natural selection, where traits that enhance survival and reproduction become more common in a population over generations. However, melanism (黑色素沉着) is not solely advantageous; it can also present challenges. In some cases, animals with excessive dark pigmentation may be more susceptible to overheating in warmer climates. This is because darker colors absorb more heat from the sun, which can lead to increased body temperatures and potential health risks. Therefore, the benefits and drawbacks of melanism (黑色素沉着) must be carefully weighed within the context of each species' specific habitat and lifestyle. Moreover, melanism (黑色素沉着) can also play a role in social interactions among animals. In some species, darker individuals may be perceived differently by their peers, influencing mating choices or social hierarchies. For example, in certain bird species, males with more vibrant plumage are often favored by females during mating displays. Conversely, in species where darker coloration is prevalent, it might signal strength or dominance, affecting competition among males. The study of melanism (黑色素沉着) extends beyond individual species; it also contributes to our understanding of biodiversity and conservation efforts. By recognizing the various forms of pigmentation in animals, scientists can better assess the health of ecosystems and the impacts of environmental changes. For instance, shifts in climate or habitat destruction may alter the distribution of melanistic traits in populations, prompting further investigation into how these changes affect survival and reproduction. In conclusion, melanism (黑色素沉着) is a remarkable aspect of the natural world that illustrates the complexity of evolutionary processes. It serves as a reminder of the delicate balance between adaptation and survival in the face of changing environments. As we continue to explore the intricacies of animal behavior and physiology, the significance of melanism (黑色素沉着) will undoubtedly remain a vital topic in the fields of biology and ecology, shedding light on the wonders of life on Earth.