| 词汇 | trophic-level |
| 释义 | trophic level noun[ C ] biology, environment specializeduk /ˌtrɒfɪk ˈlevəl/ us /ˌtrɑː.fɪk ˈlevəl/ any of the layers of an ecosystem with the same position in the food chain摄食阶层，食物阶层 Animal & plant biology - general words abiotic anatomic anatomical anatomically correct anti-Darwinian biologist biophysics Darwinist entomological entomologist entomology eukaryote experiment station naturalist organically overstimulate overstimulated overstimulation photosynthetically survival of the fittest Examples of trophic leveltrophic level On feeding on more than one trophiclevel. Dotted lines indicate estimated trophic levels, assuming a trophiclevel fractionation of 3.4 units. An additional trophiclevel might include birds, which prey on snakes, but these were not sampled in this study. However, an additional trophiclevel may exist which includes medium-sized mammals preying on snakes. However, these studies did not measure the effects of nitrogen on the third trophiclevel, the parasitoid. The distribution of spiders may be less affected by the distribution of plant species, because they are one trophiclevel further away from the defence chemicals of plants. This is crucial because the effects of these resistance factors are also likely to be manifested in the third trophiclevel, that is, on natural enemies. The aim of the present study is to quantify levels of diversification of an endemic snail fauna that represents one of the major components of the metazoan consumer trophiclevel. Because of its trophiclevel position, the golden topminow also has a wide array of predators that feed on smaller, surface feeding vertebrates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, determining the trophiclevel of some plankton is not straightforward. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The article establishes the importance of the mean trophiclevel of fisheries as a tool for measuring the health of ocean ecosystems. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The biodiversity of the phytoplankton is poor and its biomass is low, thus the lake's trophiclevel ranges from oligotrophic to mesotrophic. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There is also pyramid of numbers which represent the number of organisms in each trophiclevel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, all birds have beaks and skeletons, which despite having mass are not eaten by the next trophiclevel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Since animals are higher on the trophiclevel, they are less efficient sources of food energy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of trophic level These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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