polyphagous

简明释义

英[pəˈlɪfəɡəs]美[pəˈlɪfəɡəs]

adj. 多食症的；杂食性的

英英释义

单词用法

同义词

反义词

例句

1.The beet armyworm, Spodoptera exigua (Hubner), is a polyphagous noctuid of worldwide importance that feeds on various agricultural crops, including vegetable, cotton and ornamental.

甜菜夜蛾隶属于鳞翅目夜蛾科，是一种世界性分布、杂食性重要农业害虫，主要危害蔬菜、棉花和观赏植物。

2.The beet armyworm, Spodoptera exigua (Hubner), is a polyphagous noctuid of worldwide importance that feeds on various agricultural crops, including vegetable, cotton and ornamental.

甜菜夜蛾隶属于鳞翅目夜蛾科，是一种世界性分布、杂食性重要农业害虫，主要危害蔬菜、棉花和观赏植物。

3.The pest is polyphagous, has obvious selectivity for hosts and good adaptability to tobacco.

该蝇系多食性害虫，对寄主作物有明显的选择性，对烟草有较强的适应性。

4.More than a half polyphagous, nearly a half Oligophagous or knowing only one host.

有过半种类为多食性，近半为寡食性或仅知一种寄主。

5.Research shows that polyphagous 杂食性的 species are more resilient to environmental changes.

研究表明，polyphagous 杂食性物种对环境变化更具韧性。

6.The polyphagous 杂食性的 nature of certain fish allows them to inhabit diverse aquatic ecosystems.

某些鱼类的polyphagous 杂食性特性使它们能够栖息在多样的水生生态系统中。

7.The polyphagous 杂食性的 behavior of rats makes them a common pest in urban areas.

老鼠的polyphagous 杂食性行为使它们成为城市地区常见的害虫。

8.Many polyphagous 杂食性的 insects can adapt their diets based on food availability.

许多polyphagous 杂食性昆虫可以根据食物的可获得性调整饮食。

9.The polyphagous 杂食性的 nature of the cockroach allows it to thrive in various environments.

蟑螂的polyphagous 杂食性特性使它能够在各种环境中生存。

作文

In the vast world of ecology, the term polyphagous refers to organisms that have a diverse diet, consuming a wide variety of food sources. This adaptability is crucial for survival in fluctuating environments where food availability may vary significantly. For instance, many insects, such as cockroaches and some beetles, are considered polyphagous because they can feed on various organic materials, including decaying plant matter, other insects, and even human food. This trait allows them to thrive in different habitats and ensures their resilience against food scarcity.The concept of being polyphagous extends beyond insects to encompass various animals, including mammals and birds. Take the example of raccoons; these creatures are known for their opportunistic feeding habits, which include fruits, nuts, insects, and even human refuse. Their polyphagous nature enables them to adapt to urban environments where traditional food sources may be limited. Similarly, many bird species exhibit polyphagous behavior, allowing them to exploit a range of food sources from seeds to insects, thus enhancing their chances of survival.From an ecological perspective, polyphagous species play a vital role in maintaining the balance of ecosystems. By feeding on various plants and animals, they contribute to nutrient cycling and help control populations of other species. For example, polyphagous herbivores can prevent any single plant species from dominating an area, promoting biodiversity. In contrast, if a species is too specialized in its diet, it may face extinction if its primary food source becomes scarce due to environmental changes or human activities.However, being polyphagous also comes with its challenges. These organisms must constantly adapt to new food sources, which may require significant behavioral and physiological changes. For instance, a polyphagous insect might need to develop specific enzymes to digest different types of plant material, which can be energetically costly. Additionally, the consumption of a wider variety of foods can expose polyphagous species to toxins and pathogens present in some of these sources, necessitating robust immune systems and detoxification mechanisms.In conclusion, the term polyphagous encapsulates a fascinating aspect of ecological adaptability. Organisms that exhibit this trait demonstrate remarkable versatility in their feeding habits, allowing them to thrive in diverse environments. The ecological implications of polyphagous species are profound, influencing food webs, nutrient cycling, and biodiversity. Understanding the dynamics of polyphagous organisms not only enriches our knowledge of ecology but also highlights the importance of preserving diverse habitats to support these adaptable creatures. As we face global environmental challenges, recognizing the significance of polyphagous species can guide conservation efforts aimed at maintaining ecological balance and resilience.

在生态学的广阔世界中，术语polyphagous指的是那些饮食多样的生物，它们可以消耗多种食物来源。这种适应能力对于在食物供应可能显著变化的环境中生存至关重要。例如，许多昆虫，如蟑螂和某些甲虫，被认为是polyphagous，因为它们可以以各种有机物为食，包括腐烂的植物材料、其他昆虫甚至人类食物。这一特性使它们能够在不同栖息地中繁衍生息，并确保在食物短缺时的韧性。polyphagous的概念不仅限于昆虫，还涵盖了各种动物，包括哺乳动物和鸟类。以浣熊为例；这些生物因其机会主义的觅食习性而闻名，包括水果、坚果、昆虫甚至人类垃圾。它们的polyphagous特性使它们能够适应城市环境，在这些地方传统的食物来源可能有限。同样，许多鸟类也表现出polyphagous行为，使它们能够利用从种子到昆虫的多种食物来源，从而增强生存的机会。从生态学的角度来看，polyphagous物种在维持生态系统平衡方面发挥着重要作用。通过以各种植物和动物为食，它们有助于营养循环，并帮助控制其他物种的种群。例如，polyphagous的食草动物可以防止任何单一植物物种主导一个区域，从而促进生物多样性。相反，如果一个物种在饮食上过于专业化，一旦其主要食物来源因环境变化或人类活动而变得稀缺，它可能面临灭绝的风险。然而，成为polyphagous也带来了挑战。这些生物必须不断适应新的食物来源，这可能需要显著的行为和生理变化。例如，一个polyphagous的昆虫可能需要发展特定的酶来消化不同类型的植物材料，这可能在能量上是昂贵的。此外，消费更广泛的食物种类可能会使polyphagous物种暴露于某些食物来源中的毒素和病原体，从而需要强大的免疫系统和解毒机制。总之，术语polyphagous概括了生态适应性的一个迷人方面。表现出这一特征的生物展示了在觅食习惯上的显著多样性，使它们能够在多样的环境中生存。polyphagous物种的生态意义深远，影响着食物网、营养循环和生物多样性。理解polyphagous生物的动态不仅丰富了我们对生态学的知识，也突出了保护多样栖息地以支持这些适应性强的生物的重要性。当我们面临全球环境挑战时，认识到polyphagous物种的重要性可以指导旨在维持生态平衡和韧性的保护工作。