semelparous

简明释义

英[seməlˈpərəs]美[sɪmelˈpərəs]

终生一胎的

英英释义

单词用法

同义词

反义词

例句

1.Sockeye salmon are semelparous.

红鲑鱼终生只产卵一胎。

2.Sockeye salmon are semelparous.

红鲑鱼终生只产卵一胎。

3.The Pacific salmon is a classic example of a semelparous 一次繁殖的 species, as it spawns only once before dying.

太平洋鲑鱼是一个经典的semelparous 一次繁殖的物种的例子，因为它只在产卵后死亡。

4.Many insects, such as mayflies, are known to be semelparous 一次繁殖的, living just long enough to reproduce.

许多昆虫，如蜉蝣，被认为是semelparous 一次繁殖的，活着的时间仅足够繁殖。

5.In contrast to semelparous 一次繁殖的 organisms, iteroparous species can reproduce multiple times throughout their lives.

与semelparous 一次繁殖的生物相对的是，反复繁殖的物种可以在其生命过程中多次繁殖。

6.The life cycle of the semelparous 一次繁殖的 plant species ensures that all energy is directed towards a single reproductive event.

这种semelparous 一次繁殖的植物物种的生命周期确保所有能量都集中在一次繁殖事件上。

7.Researchers study semelparous 一次繁殖的 species to better understand the evolutionary advantages of this reproductive strategy.

研究人员研究semelparous 一次繁殖的物种，以更好地理解这种繁殖策略的进化优势。

作文

In the fascinating world of biology, various reproductive strategies have evolved among different species to ensure their survival and continuation. One intriguing term that frequently arises in this context is semelparous, which refers to organisms that reproduce only once in their lifetime. This strategy contrasts sharply with iteroparous species, which can reproduce multiple times throughout their lives. Understanding the significance of being semelparous provides insights into the complex strategies that life forms employ to thrive in their environments. Many species of plants and animals exhibit semelparous behavior, and one of the most notable examples is the Pacific salmon. After spending several years maturing in the ocean, these fish return to their birthplace to spawn. The journey back is fraught with challenges, and upon reaching their spawning grounds, they lay thousands of eggs. However, the act of reproduction comes at a high cost; after spawning, the adult salmon typically die shortly thereafter. This single, monumental effort ensures that their genetic material is passed on, albeit at the expense of their own lives. Such a life cycle highlights the intense energy investment that semelparous organisms make in their reproductive process. Another example of semelparous organisms can be found in certain species of plants, such as the agave. These plants grow for many years, accumulating resources and energy before finally flowering. The flowering event is spectacular, as it often involves a massive display of blooms that attract pollinators from far and wide. However, similar to the salmon, once they have completed this reproductive cycle, they die. This strategy may seem extreme, but it serves a purpose: by investing all their energy into one reproductive event, these plants maximize their chances of successful reproduction in a competitive environment. The semelparous strategy can be advantageous in certain ecological contexts. For instance, in environments where conditions are unpredictable or where the risk of predation is high, focusing all reproductive efforts into one significant event can ensure that at least some offspring survive. By producing a large number of offspring in one go, these species increase the likelihood that some will survive to maturity, despite the inherent risks involved. However, being semelparous also comes with its drawbacks. The reliance on a single reproductive event means that if environmental conditions are unfavorable during that time—such as drought, flooding, or predation—the entire reproductive effort can fail. This vulnerability can lead to population declines, especially in changing ecosystems where adaptability is crucial for survival. In conclusion, the concept of semelparous reproduction illustrates a remarkable aspect of biological diversity. While it may seem counterintuitive to invest everything into a single reproductive event, for many species, this strategy has proven effective in ensuring the continuation of their lineage. The study of semelparous organisms not only enriches our understanding of ecological dynamics but also emphasizes the intricate balance of life strategies that have evolved over millions of years. As we continue to explore the natural world, recognizing the value of such reproductive strategies will deepen our appreciation for the complexity of life on Earth.

在生物学的迷人世界中，不同物种为了确保它们的生存和延续，演变出了各种繁殖策略。在这个背景下，一个引人入胜的术语是semelparous，指的是一生只繁殖一次的生物。这种策略与可以在其一生中多次繁殖的iteroparous物种形成了鲜明的对比。理解成为semelparous的意义为我们提供了洞察生命形式在其环境中生存所采用复杂策略的机会。 许多植物和动物物种表现出semelparous行为，其中一个最显著的例子是太平洋鲑鱼。在海洋中成熟数年后，这些鱼类返回出生地进行产卵。回程充满挑战，一旦到达产卵地，它们会产下数千个卵子。然而，繁殖的行为代价极高；产卵后，成年的鲑鱼通常很快就会死亡。这一单一而重要的努力确保了它们的遗传物质得以传递，尽管这牺牲了它们自己的生命。这样的生命周期突显了semelparous生物在繁殖过程中所做出的巨大能量投资。 另一个semelparous生物的例子可以在某些植物物种中找到，例如龙舌兰。这些植物生长多年，积累资源和能量，然后最终开花。开花事件是壮观的，因为它通常涉及大量的花朵，吸引来自远方的传粉者。然而，与鲑鱼类似，一旦完成这一繁殖周期，它们就会死亡。这种策略可能看起来极端，但它有其目的：通过将所有能量投入到一次繁殖事件中，这些植物最大化了在竞争环境中成功繁殖的机会。 在某些生态背景下，semelparous策略可能是有利的。例如，在条件不可预测或捕食风险较高的环境中，将所有繁殖努力集中在一次重大事件上，可以确保至少一些后代生存。通过一次性产生大量后代，这些物种提高了某些后代能够成熟生存的可能性，尽管涉及的风险是固有的。 然而，成为semelparous也带来了缺点。依赖单一的繁殖事件意味着，如果在那个时间环境条件不利——例如干旱、洪水或捕食——整个繁殖努力可能会失败。这种脆弱性可能导致种群下降，尤其是在变化的生态系统中，适应能力对于生存至关重要。 总之，semelparous繁殖的概念展示了生物多样性的一个显著方面。尽管将一切投入到一次繁殖事件中似乎是反直觉的，但对于许多物种来说，这种策略已被证明是有效的，以确保其血统的延续。研究semelparous生物不仅丰富了我们对生态动态的理解，还强调了数百万年来进化出的生命策略的复杂平衡。随着我们继续探索自然世界，认识到这些繁殖策略的价值将加深我们对地球上生命复杂性的欣赏。