net reproductive ratio

简明释义

净再生产比率

英英释义

例句

1.In demographic studies, the net reproductive ratio 净繁殖比 helps predict future population growth.

在人口统计研究中，净繁殖比 net reproductive ratio 有助于预测未来的人口增长。

2.A net reproductive ratio 净繁殖比 greater than one indicates a growing population.

大于1的净繁殖比 net reproductive ratio 表示人口在增长。

3.Conservationists are monitoring the net reproductive ratio 净繁殖比 of endangered species to assess their recovery.

保护主义者正在监测濒危物种的净繁殖比 net reproductive ratio 以评估其恢复情况。

4.The study revealed that the net reproductive ratio 净繁殖比 of the species is declining due to habitat loss.

研究显示，由于栖息地丧失，该物种的净繁殖比 net reproductive ratio 正在下降。

5.The net reproductive ratio 净繁殖比 can be influenced by environmental factors such as food availability.

环境因素如食物供应可以影响净繁殖比 net reproductive ratio。

作文

The concept of the net reproductive ratio is crucial in understanding population dynamics and the overall health of ecosystems. It represents the average number of offspring that a female will produce in her lifetime, taking into account the mortality rates of both females and their offspring. This measure is essential for demographers and ecologists alike, as it provides insight into whether a population is growing, stable, or declining. In essence, the net reproductive ratio allows researchers to gauge the sustainability of a species within its environment. A ratio greater than one indicates that a population is likely to grow, while a ratio of less than one suggests a decline. For instance, if a particular species has a net reproductive ratio of 1.5, it means that, on average, each female is producing 1.5 offspring that survive to reproductive age. This knowledge can inform conservation efforts, especially for endangered species, where understanding reproductive rates is vital for implementing effective management strategies.Moreover, the net reproductive ratio is not static; it can be influenced by various factors including environmental changes, availability of resources, and human activities. For example, habitat destruction can lead to lower survival rates of offspring, thereby decreasing the net reproductive ratio. Conversely, if a species is introduced to a new habitat with abundant resources, their reproductive success might increase, leading to a higher ratio.The implications of understanding the net reproductive ratio extend beyond individual species. In a broader ecological context, it affects community dynamics and biodiversity. If certain species are thriving while others are declining, it can lead to an imbalance in the ecosystem. This imbalance can have cascading effects, altering food webs and disrupting the interactions between different species. Therefore, tracking the net reproductive ratio across various species can provide valuable data for maintaining ecological balance.In conclusion, the net reproductive ratio is a fundamental metric that aids in the comprehension of population trends and ecological health. It serves as a predictive tool for scientists and conservationists, offering insights into the reproductive success of species and the potential impacts of environmental changes. By monitoring this ratio, we can better understand the dynamics of populations and implement strategies to protect biodiversity and ensure the stability of ecosystems. Ultimately, recognizing the importance of the net reproductive ratio will enhance our ability to make informed decisions regarding wildlife conservation and environmental management.

“净生育比”这一概念在理解人口动态和生态系统的整体健康方面至关重要。它代表了一名女性在其一生中平均能产生多少后代，同时考虑到女性及其后代的死亡率。这个指标对人口统计学家和生态学家都很重要，因为它提供了关于一个种群是增长、稳定还是下降的见解。从本质上讲，“净生育比”使研究人员能够评估一个物种在其环境中的可持续性。如果比率大于1，说明该种群可能会增长，而小于1则表明种群在下降。例如，如果某个物种的“净生育比”为1.5，这意味着每只雌性平均能产生1.5只存活到繁殖年龄的后代。这一知识可以为保护工作提供信息，尤其是对于濒危物种而言，了解繁殖率对于实施有效的管理策略至关重要。此外，“净生育比”并不是静态的；它可能受到各种因素的影响，包括环境变化、资源的可用性和人类活动。例如，栖息地破坏可能导致后代的存活率降低，从而降低“净生育比”。相反，如果一个物种被引入到一个资源丰富的新栖息地，其繁殖成功率可能会提高，导致比率上升。理解“净生育比”的影响超出了单个物种的范围。在更广泛的生态背景下，它影响着群落动态和生物多样性。如果某些物种繁荣而其他物种衰退，可能会导致生态系统的不平衡。这种不平衡可能产生连锁反应，改变食物网并干扰不同物种之间的相互作用。因此，跟踪各种物种的“净生育比”可以为维持生态平衡提供有价值的数据。总之，“净生育比”是一个基本指标，有助于理解种群趋势和生态健康。它作为科学家和保护主义者的预测工具，提供了对物种繁殖成功及环境变化潜在影响的见解。通过监测这一比率，我们可以更好地理解种群的动态，并实施保护生物多样性和确保生态系统稳定的策略。最终，认识到“净生育比”的重要性将增强我们在野生动物保护和环境管理方面做出明智决策的能力。