bivalves

简明释义

英[ˈbaɪvælvz]美[ˈbaɪvælvz]

n. [无脊椎]双壳类（bivalve 的复数）

英英释义

单词用法

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例句

1.The allopatric coral fossils are collected in the olistostromes of the Upper Triassic Zhuwo Formation in Mandi, Zamtang, and two biozones of Triassic bivalves are established.

首次于壤塘县曼迪乡上三叠统侏倭组的滑塌堆积层中，采获异地埋葬珊瑚群化石，建立三叠纪双壳类两个生物带；

2.Among 52 species of mollusca identified, 45 were gastropods, 7 were bivalves.

调查期间采到的软体动物已鉴定52种，其中腹足类45种，双壳类7种。

3.The tasty bivalves are known for removing excess phytoplankton from water and sequestering nutrients in their shells and flesh.

这些美味的双壳贝类生物以清除水中过量的浮游植物闻名于世，它们把营养变成肉和贝壳。

4.The fossils show that the bottom of the food chain was dominated by species typical of later Triassic Marine faunas - such as crustaceans, fishes and bivalves - and different from preceding ones.

这些化石揭示了生物链的底层被三叠纪后期海洋生物群典型物种所掌控，这不同于之前的世纪里的动物。

5.The changes of environmental factors and physiological processes of organism play an important role in controlling the bioavailability of metal to Marine bivalves.

环境因素和机体生理过程的改变在支配重金属的生物有效性方面起了重要作用。

6.When they attach to clams, as shown above, they prevent these bivalves from opening.

当它们附在蛤蜊上时，象上面插图显示的那样，它们会妨碍这些双壳类生物打开。

7.Many marine ecosystems rely on the presence of bivalves 双壳类动物 for nutrient cycling.

许多海洋生态系统依赖于<顺>双壳类动物的存在来进行营养循环。

8.Oysters, clams, and mussels are all examples of bivalves 双壳类动物 that are popular in seafood cuisine.

牡蛎、蛤蜊和贻贝都是在海鲜烹饪中受欢迎的<顺>双壳类动物的例子。

9.The ability of bivalves 双壳类动物 to filter water makes them important for maintaining water quality.

双壳类动物过滤水的能力使它们在维持水质方面变得重要。

10.Scientists study the growth patterns of bivalves 双壳类动物 to understand environmental changes.

科学家研究<顺>双壳类动物的生长模式，以理解环境变化。

11.In coastal areas, bivalves 双壳类动物 play a key role in the ecosystem by providing habitat for other species.

在沿海地区，<顺>双壳类动物通过为其他物种提供栖息地，在生态系统中发挥关键作用。

作文

Bivalves are a fascinating group of marine and freshwater organisms that belong to the class Bivalvia. These creatures are characterized by their two-part shells, which are hinged together at one end. The term 'bivalve' comes from the Latin word 'bivalvis,' meaning 'two-valved.' Bivalves include well-known species such as clams, oysters, mussels, and scallops. They play a crucial role in aquatic ecosystems and have significant economic importance due to their use in food and aquaculture. One of the most intriguing aspects of bivalves (双壳类动物) is their feeding mechanism. Most bivalves are filter feeders, meaning they obtain their food by filtering plankton and other small particles from the water. They use a specialized structure called gills to trap food particles while simultaneously allowing water to flow through their bodies. This feeding strategy not only sustains the bivalve but also helps maintain water quality in their habitats, making them vital contributors to ecosystem health. In addition to their ecological roles, bivalves (双壳类动物) are economically significant. They are harvested for human consumption and are a staple in many cuisines around the world. Oysters, for instance, are not only enjoyed for their taste but are also cultivated for their pearls, which hold value in the jewelry market. Similarly, mussels and clams are popular seafood items that contribute to local economies, especially in coastal regions where fishing and aquaculture are prevalent. The life cycle of bivalves (双壳类动物) is another area of interest. They typically begin their lives as free-swimming larvae before settling down and developing into adult forms. This transition is critical as it determines their habitat and survival strategies. Many bivalves have a symbiotic relationship with other marine organisms, such as certain species of fish or algae, which can provide them with additional nutrients or protection from predators. However, despite their ecological and economic importance, bivalves (双壳类动物) face several threats. Overfishing, habitat destruction, and pollution are significant challenges that impact their populations. Climate change also poses a risk, as rising ocean temperatures and acidification can affect their growth and reproduction. Conservation efforts are essential to ensure the sustainability of bivalve populations and the health of aquatic ecosystems. In conclusion, bivalves (双壳类动物) are remarkable organisms that contribute significantly to both ecological balance and human economies. Their unique biological characteristics and life cycles make them an interesting subject of study in marine biology. As we continue to learn more about these creatures, it becomes increasingly important to protect their habitats and promote sustainable practices that will allow future generations to enjoy the benefits they provide.