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A. The first trophic level B. The second trophic level C. The third trophic level D. The fourth trophic level 相关知识点: 试题来源: 解析 B。解析:在生态系统中,生产者处于第一营养级,食草动物以生产者为食,处于第二营养级。所以答案是B。A选项第一营养级是生产者。C选项第三营养级通常是食肉...
An organism's "trophic level" refers to? Explain how some heterotrophs could be described as either a primary consumer or a secondary consumer. In the complex food chain, what is the primary producer? The energy contained in all tertiary cons...
A. there is less energy available at higher trophic levels B. there is more energy available at higher trophic levels C. the amount of energy is the same at all trophic levels D. energy is not lost in an E. cosystem 相关知识点: 试题...
Related Articles: beaver , ecology , elk , kelp , sea otter , sea urchin , trophic level , trophic pyramid , wolf , trophic cascade Transcript A trophic cascade is ecological change that happens when a predator is removed from the food pyramid. The removal of a carnivore at the top of...
In autumn, when trophic resources showed a twofold reduction in abundance, the population trophic niche width (TNW = 2.58) was significantly broader than during spring (TNW = 2.25), and in both seasons, individual specialization (IS) was significantly higher than expected by chance (= 0.001). ...
Energy transfer in the food chain is from one trophic level to next. However, not all the energy is transferred as some of it is used for movement, growth, or reproduction repair. The energy flow begins from the primary producers that make their own food by using the solar energy through...
The tri-trophic study system consisted of the plant Macropiper excelsum, its main insect herbivore Cleora scriptaria, and two parasitoid wasps: the braconids Aleiodes declanae (endemic specialist) and Meteorus pulchricornis (exotic generalist).3. Parasitism by Aleiodes declanae was significantly ...
Each trophic level is indicated by TP: top predators, C: carnivores, O: omnivores, H: herbivores, FF: filter-feeders, B: basal species, and P: plankton. Red and black outlined nodes represent the biomass of harvested and non-harvested species, respectively. Solid black, solid grey, and ...